Cleaned up the text, added headings that means the table of contents is
more useful.
NOTE: There are still several TODO sections that need content.
Change-Id: I95903861e358807e48ea3f2143dd7394759a1ff1
Issue-ID: LOG-91
Signed-off-by: MatthewHarffy <Matthew.harffy@amdocs.com>
to many logfiles. The volume of logger output may be enormous,
especially when debugging. Large, disparate logfiles are difficult to
monitor and analyze, and tracing requests across many files, file
to many logfiles. The volume of logger output may be enormous,
especially when debugging. Large, disparate logfiles are difficult to
monitor and analyze, and tracing requests across many files, file
-systems and containers is untenable without tooling.
+systems and containers is untenable without tooling.
The problem of decentralized logger output is addressed by analytics
The problem of decentralized logger output is addressed by analytics
-pipelines such as \ `*Elastic
-Stack* <https://www.elastic.co/products>`__ (ELK). Elastic Stack
+pipelines such as \ `*Elastic
+Stack* <https://www.elastic.co/products>`__ (ELK). Elastic Stack
consumes logs, indexes their contents
consumes logs, indexes their contents
-in \ `*Elasticsearch* <https://www.elastic.co/products/elasticsearch>`__,
+in \ `*Elasticsearch* <https://www.elastic.co/products/elasticsearch>`__,
and makes them accessible, queryable and navigable via a sophisticated
and makes them accessible, queryable and navigable via a sophisticated
Discover* <https://www.elastic.co/guide/en/kibana/current/discover.html>`__.
This elevates the importance of standardization and machine-readability.
Logfiles can remain browsable, but output can be simplified.
Discover* <https://www.elastic.co/guide/en/kibana/current/discover.html>`__.
This elevates the importance of standardization and machine-readability.
Logfiles can remain browsable, but output can be simplified.
these issues will prevent costs from being externalized to consumers
such as analytics. It also affords the opportunity to remedy any issues
with the handling and propagation of contextual information such as
these issues will prevent costs from being externalized to consumers
such as analytics. It also affords the opportunity to remedy any issues
with the handling and propagation of contextual information such as
-transaction identifiers (presently passed as \ **X-ECOMP-RequestID **-
-to be\ ** X-ONAP-RequestID**). This propagation is critical to tracing
+transaction identifiers (presently passed as \ **X-ECOMP-RequestID **-
+to be\ ** X-ONAP-RequestID**). This propagation is critical to tracing
requests as they traverse ONAP and related systems, and is the basis for
requests as they traverse ONAP and related systems, and is the basis for
-many analytics functions.
+many analytics functions.
Rationalized logger configuration and output also paves the way for
other high-performance logger transports, including publishing directly
to analytics via SYSLOG
Rationalized logger configuration and output also paves the way for
other high-performance logger transports, including publishing directly
to analytics via SYSLOG
-(`*RFC3164* <https://www.ietf.org/rfc/rfc3164.txt>`__, \ `*RFC5425* <https://www.ietf.org/rfc/rfc5425.txt>`__, \ `*RFC5426* <https://www.ietf.org/rfc/rfc5426.txt>`__)
+(`*RFC3164* <https://www.ietf.org/rfc/rfc3164.txt>`__, \ `*RFC5425* <https://www.ietf.org/rfc/rfc5425.txt>`__, \ `*RFC5426* <https://www.ietf.org/rfc/rfc5426.txt>`__)
and streams, and mechanisms for durability.
Each change is believed to be individually beneficial:
and streams, and mechanisms for durability.
Each change is believed to be individually beneficial:
========================================
Introduction
========================================
Introduction
The purpose of ONAP logging is to capture information needed to operate,
troubleshoot and report on the performance of the ONAP platform and its
constituent components. Log records may be viewed and consumed directly
by users and systems, indexed and loaded into a datastore, and used to
The purpose of ONAP logging is to capture information needed to operate,
troubleshoot and report on the performance of the ONAP platform and its
constituent components. Log records may be viewed and consumed directly
by users and systems, indexed and loaded into a datastore, and used to
-compute metrics and generate reports.
+compute metrics and generate reports.
The processing of a single client request will often involve multiple
ONAP components and/or subcomponents (interchangeably referred to as
The processing of a single client request will often involve multiple
ONAP components and/or subcomponents (interchangeably referred to as
-‘application’ in this document). The ability to track flows across
-components is critical to understanding ONAP’s behavior and performance.
+application in this document). The ability to track flows across
+components is critical to understanding ONAPs behavior and performance.
ONAP logging uses a universally unique RequestID value in log records to
track the processing of every client request through all the ONAP
components involved in its processing.
ONAP logging uses a universally unique RequestID value in log records to
track the processing of every client request through all the ONAP
components involved in its processing.
-A reference configuration of \ `*Elastic
-Stack * <https://www.elastic.co/products>`__\ can be deployed
-using \ `*ONAP Operations
-Manager* <https://wiki.onap.org/display/DW/ONAP+Operations+Manager+Project>`__.
+A reference configuration of \ `*Elastic
+Stack * <https://www.elastic.co/products>`__\ can be deployed
+using \ `*ONAP Operations
+Manager* <https://wiki.onap.org/display/DW/ONAP+Operations+Manager+Project>`__.
This document gives conventions you can follow to generate conformant,
indexable logging output from your component.
How to Log
This document gives conventions you can follow to generate conformant,
indexable logging output from your component.
How to Log
ONAP prescribes conventions. The use of certain APIs and providers is
recommended, but they are not mandatory. Most components log
ONAP prescribes conventions. The use of certain APIs and providers is
recommended, but they are not mandatory. Most components log
-via \ `*EELF* <https://github.com/att/EELF>`__ or `*SLF4J* <https://www.slf4j.org/>`__ to
+via \ `*EELF* <https://github.com/att/EELF>`__ or `*SLF4J* <https://www.slf4j.org/>`__ to
-like \ `*Logback* <https://logback.qos.ch/>`__ or `*Log4j* <https://logging.apache.org/log4j/2.x/>`__.
+like \ `*Logback* <https://logback.qos.ch/>`__ or `*Log4j* <https://logging.apache.org/log4j/2.x/>`__.
-EELF is the\ ** Event and Error Logging Framework**, described
-at \ `*https://github.com/att/EELF* <https://github.com/att/EELF>`__.
+EELF is the\ **Event and Error Logging Framework**, described
+at \ `*https://github.com/att/EELF* <https://github.com/att/EELF>`__.
EELF abstracts your choice of logging provider, and decorates the
familiar Logger contracts with features like:
EELF abstracts your choice of logging provider, and decorates the
familiar Logger contracts with features like:
-- Generated wiki documentation.
+- Generated wiki documentation.
-- Separate audit, metric, security and debug logs.
+- Separate audit, metric, security and debug logs.
EELF is a facade, so logging output is configured in two ways:
1. By selection of a logging provider such as Logback or Log4j,
EELF is a facade, so logging output is configured in two ways:
1. By selection of a logging provider such as Logback or Log4j,
- typically via the classpath.
+ typically via the classpath.
2. By way of a provider configuration document,
2. By way of a provider configuration document,
- typically \ **logback.xml** or **log4j.xml**.
- See \ `*Providers* <https://wiki.onap.org/display/DW/ONAP+Application+Logging+Guidelines+v1.1#ONAPApplicationLoggingGuidelinesv1.1-Providers>`__.
+ typically \ **logback.xml** or **log4j.xml**.
+ See \ `*Providers* <https://wiki.onap.org/display/DW/ONAP+Application+Logging+Guidelines+v1.1#ONAPApplicationLoggingGuidelinesv1.1-Providers>`__.
-`*SLF4J* <https://www.slf4j.org/>`__ is a logging facade, and a humble
+`*SLF4J* <https://www.slf4j.org/>`__ is a logging facade, and a humble
masterpiece. It combines what's common to all major, modern Java logging
providers into a single interface. This decouples the caller from the
provider, and encourages the use of what's universal, familiar and
masterpiece. It combines what's common to all major, modern Java logging
providers into a single interface. This decouples the caller from the
provider, and encourages the use of what's universal, familiar and
EELF also logs via SLF4J's abstractions.
EELF also logs via SLF4J's abstractions.
Logging providers are normally enabled by their presence in the
classpath. This means the decision may have been made for you, in some
Logging providers are normally enabled by their presence in the
classpath. This means the decision may have been made for you, in some
you can change providers, but since the implementation is typically
abstracted behind EELF or SLF4J, it may not be worth the effort.
you can change providers, but since the implementation is typically
abstracted behind EELF or SLF4J, it may not be worth the effort.
+*******
+Logback
+*******
-Logback is the most commonly used provider. It is generally configured
-by an XML document named \ **logback.xml**.
-See \ `*Configuration* <https://wiki.onap.org/display/DW/ONAP+Application+Logging+Guidelines+v1.1#ONAPApplicationLoggingGuidelinesv1.1-Configuration>`__.
+Logback is the most commonly used provider. It is generally configured
+by an XML document named \ **logback.xml**.
+See \ `*Configuration* <https://wiki.onap.org/display/DW/ONAP+Application+Logging+Guidelines+v1.1#ONAPApplicationLoggingGuidelinesv1.1-Configuration>`__.
+*************
+Log4j 2.X
+*************
Log4j 2.X is somewhat less common than Logback, but equivalent. It is
generally configured by an XML document
Log4j 2.X is somewhat less common than Logback, but equivalent. It is
generally configured by an XML document
-named \ **log4j.xml**. See \ `*Configuration* <https://wiki.onap.org/display/DW/ONAP+Application+Logging+Guidelines+v1.1#ONAPApplicationLoggingGuidelinesv1.1-Configuration>`__.
+named \ **log4j.xml**. See \ `*Configuration* <https://wiki.onap.org/display/DW/ONAP+Application+Logging+Guidelines+v1.1#ONAPApplicationLoggingGuidelinesv1.1-Configuration>`__.
+*********
+Log4j 1.X
+*********
Avoid, since 1.X is EOL, and since it does not support escaping, so its
output may not be
Avoid, since 1.X is EOL, and since it does not support escaping, so its
output may not be
-machine-readable. See \ `*https://logging.apache.org/log4j/1.2/* <https://logging.apache.org/log4j/1.2/>`__.
+machine-readable. See \ `*https://logging.apache.org/log4j/1.2/* <https://logging.apache.org/log4j/1.2/>`__.
This affects existing OpenDaylight-based components like SDNC and APPC,
since ODL releases prior
This affects existing OpenDaylight-based components like SDNC and APPC,
since ODL releases prior
-to \ `*Carbon* <https://www.opendaylight.org/what-we-do/current-release>`__ bundle
-Log4j 1.X, and make it difficult to replace. The \ `*Common Controller
+to \ `*Carbon* <https://www.opendaylight.org/what-we-do/current-release>`__ bundle
+Log4j 1.X, and make it difficult to replace. The \ `*Common Controller
-Project* <https://wiki.onap.org/display/DW/Common+Controller+SDK+Project>`__ project
+Project* <https://wiki.onap.org/display/DW/Common+Controller+SDK+Project>`__ project
targets ODL Carbon, so the problem should resolve in time.
What to Log
targets ODL Carbon, so the problem should resolve in time.
What to Log
The purpose of logging is to capture diagnostic information.
An important aspect of this is analytics, which requires tracing of
requests between components. In a large, distributed system such as ONAP
The purpose of logging is to capture diagnostic information.
An important aspect of this is analytics, which requires tracing of
requests between components. In a large, distributed system such as ONAP
-this is critical to understanding behavior and performance.
+this is critical to understanding behavior and performance.
Messages, Levels, Components and Categories
Messages, Levels, Components and Categories
+--------------------------------------------
It isn't the aim of this document to reiterate the basics, so advice
It isn't the aim of this document to reiterate the basics, so advice
-- Use a logger. Consider using EELF.
+- Use a logger. Consider using EELF.
- Write log messages in English.
- Write meaningful messages. Consider what will be useful to consumers
- Write log messages in English.
- Write meaningful messages. Consider what will be useful to consumers
- Use errorcodes to characterise exceptions.
- Use errorcodes to characterise exceptions.
- Log for analytics as well as troubleshooting.
- Log for analytics as well as troubleshooting.
-Others have written extensively on this:
+Others have written extensively on this:
- `*http://www.masterzen.fr/2013/01/13/the-10-commandments-of-logging/* <http://www.masterzen.fr/2013/01/13/the-10-commandments-of-logging/>`__
- `*http://www.masterzen.fr/2013/01/13/the-10-commandments-of-logging/* <http://www.masterzen.fr/2013/01/13/the-10-commandments-of-logging/>`__
**TODO: more on the importance of transaction ID propagation.**
**TODO: more on the importance of transaction ID propagation.**
A Mapped Diagnostic Context (MDC) allows an arbitrary string-valued
attribute to be attached to a Java thread. The MDC's value is then
emitted with each log message. The set of MDCs associated with a log
A Mapped Diagnostic Context (MDC) allows an arbitrary string-valued
attribute to be attached to a Java thread. The MDC's value is then
emitted with each log message. The set of MDCs associated with a log
-message is serialized as unordered name-value pairs (see `*Text
+message is serialized as unordered name-value pairs (see `*Text
Output* <https://wiki.onap.org/display/DW/ONAP+Application+Logging+Guidelines+v1.1#ONAPApplicationLoggingGuidelinesv1.1-TextOutput>`__).
A good discussion of MDCs can be found
Output* <https://wiki.onap.org/display/DW/ONAP+Application+Logging+Guidelines+v1.1#ONAPApplicationLoggingGuidelinesv1.1-TextOutput>`__).
A good discussion of MDCs can be found
-at \ `*https://logback.qos.ch/manual/mdc.html* <https://logback.qos.ch/manual/mdc.html>`__.
+at \ `*https://logback.qos.ch/manual/mdc.html* <https://logback.qos.ch/manual/mdc.html>`__.
-- Must be set as early in invocation as possible.
+- Must be set as early in invocation as possible.
-- Must be unset on exit.
+- Must be unset on exit.
+------+-------------------------------------------------------------------------------------+
+------+-------------------------------------------------------------------------------------+
-| 1 | import java.util.UUID; |
+| 1 | import java.util.UUID; |
-| 2 | import org.slf4j.Logger; |
+| 2 | import org.slf4j.Logger; |
-| 3 | import org.slf4j.LoggerFactory; |
+| 3 | import org.slf4j.LoggerFactory; |
-| 4 | import org.slf4j.MDC; |
+| 4 | import org.slf4j.MDC; |
| | |
| 5 | // ... |
| | |
| | |
| 5 | // ... |
| | |
-| 6 | final Logger logger = LoggerFactory.getLogger(this.getClass()); |
+| 6 | final Logger logger = LoggerFactory.getLogger(this.getClass()); |
| | |
| 7 | MDC.put("SomeUUID", UUID.randomUUID().toString()); |
| | |
| | |
| 7 | MDC.put("SomeUUID", UUID.randomUUID().toString()); |
| | |
-| 9 | logger.info("This message will have a UUID-valued 'SomeUUID' MDC attached."); |
+| 9 | logger.info("This message will have a UUID-valued 'SomeUUID' MDC attached."); |
| | |
| 14 | } |
+------+-------------------------------------------------------------------------------------+
EELF doesn't directly support MDCs, but SLF4J will receive any MDC that
| | |
| 14 | } |
+------+-------------------------------------------------------------------------------------+
EELF doesn't directly support MDCs, but SLF4J will receive any MDC that
-is set (where **com.att.eelf.configuration.SLF4jWrapper** is the
+is set (where **com.att.eelf.configuration.SLF4jWrapper** is the
configured EELF provider):
+------+-------------------------------------------------------------------------------------+
configured EELF provider):
+------+-------------------------------------------------------------------------------------+
-| 1 | import java.util.UUID; |
+| 1 | import java.util.UUID; |
-| 2 | import org.slf4j.Logger; |
+| 2 | import org.slf4j.Logger; |
-| 3 | import org.slf4j.LoggerFactory; |
+| 3 | import org.slf4j.LoggerFactory; |
-| 4 | import org.slf4j.MDC; |
+| 4 | import org.slf4j.MDC; |
-| 5 | import com.att.eelf.configuration.EELFLogger; |
+| 5 | import com.att.eelf.configuration.EELFLogger; |
-| 6 | import com.att.eelf.configuration.EELFManager; |
+| 6 | import com.att.eelf.configuration.EELFManager; |
| | |
| 7 | // ... |
| | |
| | |
| 7 | // ... |
| | |
-| 8 | final EELFLogger logger = EELFManager.getInstance().getLogger(this.getClass()); |
+| 8 | final EELFLogger logger = EELFManager.getInstance().getLogger(this.getClass()); |
| | |
| 9 | MDC.put("SomeUUID", UUID.randomUUID().toString()); |
| | |
| | |
| 9 | MDC.put("SomeUUID", UUID.randomUUID().toString()); |
| | |
-| 11 | logger.info("This message will have a UUID-valued 'SomeUUID' MDC attached."); |
+| 11 | logger.info("This message will have a UUID-valued 'SomeUUID' MDC attached."); |
| | |
| 16 | } |
+------+-------------------------------------------------------------------------------------+
| | |
| 16 | } |
+------+-------------------------------------------------------------------------------------+
+Serializing
+-----------
Output of MDCs must ensure that:
Output of MDCs must ensure that:
| 1 | %replace(%replace(%mdc){'\\t','\\\\\\\\t'}){'\\n','\\\\\\\\n'} |
+-----+------------------------------------------------------------------+
| 1 | %replace(%replace(%mdc){'\\t','\\\\\\\\t'}){'\\n','\\\\\\\\n'} |
+-----+------------------------------------------------------------------+
+MDC - RequestID
+---------------
This is often referred to by other names, including "Transaction ID",
and one of several (pre-standardization) REST header names
This is often referred to by other names, including "Transaction ID",
and one of several (pre-standardization) REST header names
-including \ **X-ECOMP-RequestID** and **X-ONAP-RequestID**.
+including \ **X-ECOMP-RequestID** and **X-ONAP-RequestID**.
-ONAP logging uses a universally unique "**RequestID"** value in log
+ONAP logging uses a universally unique "**RequestID"** value in log
records to track the processing of each client request across all the
ONAP components involved in its processing.
This value:
records to track the processing of each client request across all the
ONAP components involved in its processing.
This value:
-- Is logged as a \ **RequestID** MDC.
+- Is logged as a \ **RequestID** MDC.
- Is propagated between components in REST calls as
- Is propagated between components in REST calls as
- an \ **X-TransactionID** HTTP header.
+ an \ **X-TransactionID** HTTP header.
-Receiving the \ **X-TransactionID** will vary by component according to
+Receiving the \ **X-TransactionID** will vary by component according to
APIs and frameworks. In general:
+-----+--------------------------------------------------------------------------+
APIs and frameworks. In general:
+-----+--------------------------------------------------------------------------+
-| 1 | import javax.ws.rs.core.HttpHeaders; |
+| 1 | import javax.ws.rs.core.HttpHeaders; |
| | |
| 2 | // ... |
| | |
| | |
| 2 | // ... |
| | |
-| 3 | final HttpHeaders headers = ...; |
+| 3 | final HttpHeaders headers = ...; |
| | |
| 4 | // ... |
| | |
| 5 | String txId = headers.getRequestHeaders().getFirst("X-TransactionID"); |
| | |
| | |
| 4 | // ... |
| | |
| 5 | String txId = headers.getRequestHeaders().getFirst("X-TransactionID"); |
| | |
-| 6 | if (StringUtils.isBlank(txId)) { |
+| 6 | if (StringUtils.isBlank(txId)) { |
-| 7 | txId = UUID.randomUUID().toString(); |
+| 7 | txId = UUID.randomUUID().toString(); |
| | |
| 8 | } |
| | |
| 9 | MDC.put("RequestID", txID); |
+-----+--------------------------------------------------------------------------+
| | |
| 8 | } |
| | |
| 9 | MDC.put("RequestID", txID); |
+-----+--------------------------------------------------------------------------+
-Setting the \ **X-TransactionID** likewise will vary. For example:
+Setting the \ **X-TransactionID** likewise will vary. For example:
+-----+---------------------------------------------------+
+-----+---------------------------------------------------+
-| 1 | final String txID = MDC.get("RequestID"); |
+| 1 | final String txID = MDC.get("RequestID"); |
| | |
| 2 | HttpURLConnection cx = ...; |
| | |
| | |
| 2 | HttpURLConnection cx = ...; |
| | |
| 4 | cx.setRequestProperty("X-TransactionID", txID); |
+-----+---------------------------------------------------+
| 4 | cx.setRequestProperty("X-TransactionID", txID); |
+-----+---------------------------------------------------+
+MDC - InvocationID
+------------------
-**InvocationID** is similar to \ **RequestID**, but
-where \ **RequestID** correlates records relating a single, top-level
+**InvocationID** is similar to \ **RequestID**, but
+where \ **RequestID** correlates records relating a single, top-level
invocation of ONAP as it traverses many
invocation of ONAP as it traverses many
-systems, \ **InvocationID** correlates log entries relating to a single
+systems, \ **InvocationID** correlates log entries relating to a single
invocation of a single component. Typically this means via REST, but in
invocation of a single component. Typically this means via REST, but in
-certain cases an \ **InvocationID** may be allocated without a new
+certain cases an \ **InvocationID** may be allocated without a new
invocation, e.g. when a request is retried.
invocation, e.g. when a request is retried.
-**RequestID** and** InvocationID** allow an execution graph to be
+**RequestID** and** InvocationID** allow an execution graph to be
derived. This requires that:
derived. This requires that:
-- The relationship between \ **RequestID** and **InvocationID** is
- reported.
+- The relationship between \ **RequestID** and **InvocationID** is
+ reported.
-- The relationship between caller and recipient is reported for each
+- The relationship between caller and recipient is reported for each
invocation.
The proposed approach is that:
- Callers:
invocation.
The proposed approach is that:
- Callers:
- - Issue a new, unique \ **InvocationID** UUID for each downstream
- call they make.
+ - Issue a new, unique \ **InvocationID** UUID for each downstream
+ call they make.
- - Log the new \ **InvocationID**, indicating the intent to invoke:
+ - Log the new \ **InvocationID**, indicating the intent to invoke:
- - With Markers \ **INVOKE**, and \ **SYNCHRONOUS** if the
+ - With Markers \ **INVOKE**, and \ **SYNCHRONOUS** if the
invocation is synchronous.
invocation is synchronous.
- - With their own \ **InvocationID** still set as an MDC.
+ - With their own \ **InvocationID** still set as an MDC.
- - Pass the \ **InvocationID** as an \ **X-InvocationID** REST
+ - Pass the \ **InvocationID** as an \ **X-InvocationID** REST
header.
- Invoked components:
header.
- Invoked components:
- - Retrieve the \ **InvocationID** from REST headers upon invocation,
- or generate a UUID default.
+ - Retrieve the \ **InvocationID** from REST headers upon invocation,
+ or generate a UUID default.
- - Set the \ **InvocationID** MDC.
+ - Set the \ **InvocationID** MDC.
- - Write a log entry with the Marker \ **ENTRY**. (In EELF this will
+ - Write a log entry with the Marker \ **ENTRY**. (In EELF this will
- - Act as per Callers in all downstream requests.
+ - Act as per Callers in all downstream requests.
- - Write a log entry with the Marker \ **EXIT** upon return. (In EELF
+ - Write a log entry with the Marker \ **EXIT** upon return. (In EELF
this will be to the METRIC log).
- Unset all MDCs on exit.
That seems onerous, but:
this will be to the METRIC log).
- Unset all MDCs on exit.
That seems onerous, but:
-- It's only a few calls.
+- It's only a few calls.
- It can be largely abstracted in the case of EELF logging.
**TODO: code.**
- It can be largely abstracted in the case of EELF logging.
**TODO: code.**
+MDCs - the Rest
+---------------
Other MDCs are logged in a wide range of contexts.
Other MDCs are logged in a wide range of contexts.
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
| **ID** | **MDC** | **Description** | **Required** | **EELF Audit** | **EELF Metric** | **EELF Error** | **EELF Debug** |
+==========+=======================+================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================+================+==================+===================+==================+==================+
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
| **ID** | **MDC** | **Description** | **Required** | **EELF Audit** | **EELF Metric** | **EELF Error** | **EELF Debug** |
+==========+=======================+================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================+================+==================+===================+==================+==================+
-| 1 | BeginTimestamp | Date-time that processing activities being logged begins. The value should be represented in UTC and formatted per ISO 8601, such as â\80\9c2015-06-03T13:21:58+00:00â\80\9d. The time should be shown with the maximum resolution available to the logging component (e.g., milliseconds, microseconds) by including the appropriate number of decimal digits. For example, when millisecond precision is available, the date-time value would be presented as, as â\80\9c2015-06-03T13:21:58.340+00:00â\80\9d. | Y | | | | |
+| 1 | BeginTimestamp | Date-time that processing activities being logged begins. The value should be represented in UTC and formatted per ISO 8601, such as Å\932015-06-03T13:21:58+00:00Â\9d. The time should be shown with the maximum resolution available to the logging component (e.g., milliseconds, microseconds) by including the appropriate number of decimal digits. For example, when millisecond precision is available, the date-time value would be presented as, as Å\932015-06-03T13:21:58.340+00:00Â\9d. | Y | | | | |
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
| 2 | EndTimestamp | Date-time that processing for the request or event being logged ends. Formatting rules are the same as for the BeginTimestamp field above. | Y | | | | |
| | | | | | | | |
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
| 2 | EndTimestamp | Date-time that processing for the request or event being logged ends. Formatting rules are the same as for the BeginTimestamp field above. | Y | | | | |
| | | | | | | | |
| 4 | ServiceInstanceID | This field is optional and should only be included if the information is readily available to the logging component. | | | | | |
| | | | | | | | |
| | | | Transaction requests that create or operate on a particular instance of a service/resource can | | | | | |
| 4 | ServiceInstanceID | This field is optional and should only be included if the information is readily available to the logging component. | | | | | |
| | | | | | | | |
| | | | Transaction requests that create or operate on a particular instance of a service/resource can | | | | | |
-| | | | identify/reference it via a unique â\80\9cserviceInstanceIDâ\80\9d value. This value can be used as a primary key for | | | | | |
+| | | | identify/reference it via a unique Å\93serviceInstanceIDÂ\9d value. This value can be used as a primary key for | | | | | |
| | | | obtaining or updating additional detailed data about that specific service instance from the inventory | | | | | |
| | | | (e.g., AAI). In other words: | | | | | |
| | | | | | | | |
| | | - In the case of processing/logging a transaction request for creating a new service instance, the serviceInstanceID value is determined by either a) the MSO client and passed to MSO or b) by MSO itself upon receipt of a such a request. | | | | | |
| | | | | | | | |
| | | | obtaining or updating additional detailed data about that specific service instance from the inventory | | | | | |
| | | | (e.g., AAI). In other words: | | | | | |
| | | | | | | | |
| | | - In the case of processing/logging a transaction request for creating a new service instance, the serviceInstanceID value is determined by either a) the MSO client and passed to MSO or b) by MSO itself upon receipt of a such a request. | | | | | |
| | | | | | | | |
-| | | - In other cases, the serviceInstanceID value can be used to reference a specific instance of a service as would happen in a â\80\9cMACDâ\80\9d-type request. | | | | | |
+| | | - In other cases, the serviceInstanceID value can be used to reference a specific instance of a service as would happen in a Å\93MACDÂ\9d-type request. | | | | | |
-| | | - ServiceInstanceID is associated with a requestID in log records to facilitate tracing its processing over multiple requests and for a specific service instance. Its value may be left â\80\9cemptyâ\80\9d in subsequent record to the 1 st record where a requestID value is associated with the serviceInstanceID value. | | | | | |
+| | | - ServiceInstanceID is associated with a requestID in log records to facilitate tracing its processing over multiple requests and for a specific service instance. Its value may be left Å\93emptyÂ\9d in subsequent record to the 1 st record where a requestID value is associated with the serviceInstanceID value. | | | | | |
-| | | NOTE: AAI won’t have a serviceInstanceUUID for every service instance. For example, no serviceInstanceUUID is available when the request is coming from an application that may import inventory data. | | | | | |
+| | | NOTE: AAI wont have a serviceInstanceUUID for every service instance. For example, no serviceInstanceUUID is available when the request is coming from an application that may import inventory data. | | | | | |
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
| 5 | VirtualServerName | Physical/virtual server name. Optional: empty if determined that its value can be added by the agent that collects the log files collecting. | | | | | |
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
| 5 | VirtualServerName | Physical/virtual server name. Optional: empty if determined that its value can be added by the agent that collects the log files collecting. | | | | | |
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
| 9 | ResponseCode | This field contains application-specific error codes. For consistency, common error categorizations should be used. | | | | | |
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
| 9 | ResponseCode | This field contains application-specific error codes. For consistency, common error categorizations should be used. | | | | | |
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
-| 10 | ResponseDescription | This field contains a human readable description of the \ **ResponseCode**. | | | | | 11 |
+| 10 | ResponseDescription | This field contains a human readable description of the \ **ResponseCode**. | | | | | 11 |
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
| 11 | InstanceUUID | If known, this field contains a universally unique identifier used to differentiate between multiple instances of the same (named) log writing service/application. Its value is set at instance creation time (and read by it, e.g., at start/initialization time from the environment). This value should be picked up by the component instance from its configuration file and subsequently used to enable differentiation of log records created by multiple, locally load balanced ONAP component or subcomponent instances that are otherwise identically configured. | | | | | |
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
| 11 | InstanceUUID | If known, this field contains a universally unique identifier used to differentiate between multiple instances of the same (named) log writing service/application. Its value is set at instance creation time (and read by it, e.g., at start/initialization time from the environment). This value should be picked up by the component instance from its configuration file and subsequently used to enable differentiation of log records created by multiple, locally load balanced ONAP component or subcomponent instances that are otherwise identically configured. | | | | | |
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
-| 12 | Severity | Optional: 0, 1, 2, 3 see \ `*Nagios* <https://en.wikipedia.org/wiki/Nagios>`__ monitoring/alerting for specifics/details. | | | | | |
+| 12 | Severity | Optional: 0, 1, 2, 3 see \ `*Nagios* <https://en.wikipedia.org/wiki/Nagios>`__ monitoring/alerting for specifics/details. | | | | | |
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
| 13 | TargetEntity | It contains the name of the ONAP component or sub-component, or external entity, at which the operation activities captured in this metrics log record is invoked. | Y | | | | |
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
| 13 | TargetEntity | It contains the name of the ONAP component or sub-component, or external entity, at which the operation activities captured in this metrics log record is invoked. | Y | | | | |
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
| 15 | Server | This field contains the Virtual Machine (VM) Fully Qualified Domain Name (FQDN) if the server is virtualized. Otherwise, it contains the host name of the logging component. | Y | | | | |
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
| 15 | Server | This field contains the Virtual Machine (VM) Fully Qualified Domain Name (FQDN) if the server is virtualized. Otherwise, it contains the host name of the logging component. | Y | | | | |
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
-| 16 | ServerIPAddress | This field contains the logging component host server’s IP address if known (e.g. Jetty container’s listening IP address). Otherwise it is empty. | | | | | |
+| 16 | ServerIPAddress | This field contains the logging component host servers IP address if known (e.g. Jetty containers listening IP address). Otherwise it is empty. | | | | | |
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
-| 17 | ServerFQDN | Unclear, but possibly duplicating one or both of \ **Server** and **ServerIPAddress**. | | | | | |
+| 17 | ServerFQDN | Unclear, but possibly duplicating one or both of \ **Server** and **ServerIPAddress**. | | | | | |
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
-| 18 | ClientIPAddress | This field contains the requesting remote client application’s IP address if known. Otherwise this field can be empty. | | | | | |
+| 18 | ClientIPAddress | This field contains the requesting remote client applications IP address if known. Otherwise this field can be empty. | | | | | |
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
| 19 | ProcessKey | This field can be used to capture the flow of a transaction through the system by indicating the components and operations involved in processing. If present, it can be denoted by a comma separated list of components and applications. | | | | | |
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
| 19 | ProcessKey | This field can be used to capture the flow of a transaction through the system by indicating the components and operations involved in processing. If present, it can be denoted by a comma separated list of components and applications. | | | | | |
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
| 28 | CustomField4 | (Defunct now that MDCs are serialized as NVPs.) | | | | | |
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
| 28 | CustomField4 | (Defunct now that MDCs are serialized as NVPs.) | | | | | |
+----------+-----------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------+------------------+-------------------+------------------+------------------+
| 2017-09-07T18:04:03.679Z\|\|\|\|\|qtp1013423070-72297\|\|ASDC\|SDC-BE\|\|\|\|\|\|\|N/A\|INFO\|\|\|\|10.42.88.30\|\|o.o.s.v.r.s.VendorLicenseModelsImpl\|\|ActivityType=<audit>, Desc=< --Audit-- Create VLM. VLM Name: lm4> |
+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| 2017-09-07T18:04:03.679Z\|\|\|\|\|qtp1013423070-72297\|\|ASDC\|SDC-BE\|\|\|\|\|\|\|N/A\|INFO\|\|\|\|10.42.88.30\|\|o.o.s.v.r.s.VendorLicenseModelsImpl\|\|ActivityType=<audit>, Desc=< --Audit-- Create VLM. VLM Name: lm4> |
+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
-**TODO: this is the earlier output format. Let's find an example which
-matches the latest line format.**
+**TODO: this is the earlier output format. Let's find an example which matches the latest line format.**
Markers differ from MDCs in two important ways:
Markers differ from MDCs in two important ways:
-1. They have a name, but no value. They are a tag.
+1. They have a name, but no value. They are a tag.
2. Their scope is limited to logger calls which specifically reference
them; they are
2. Their scope is limited to logger calls which specifically reference
them; they are
- not \ `*ThreadLocal* <https://docs.oracle.com/javase/8/docs/api/java/lang/ThreadLocal.html>`__.
+ not \ `*ThreadLocal* <https://docs.oracle.com/javase/8/docs/api/java/lang/ThreadLocal.html>`__.
+-----+-----------------------------------------------------------------------+
+-----+-----------------------------------------------------------------------+
-| 1 | import org.slf4j.Logger; |
+| 1 | import org.slf4j.Logger; |
-| 2 | import org.slf4j.LoggerFactory; |
+| 2 | import org.slf4j.LoggerFactory; |
-| 3 | import org.slf4j.Marker; |
+| 3 | import org.slf4j.Marker; |
-| 4 | import org.slf4j.MarkerFactory; |
+| 4 | import org.slf4j.MarkerFactory; |
| | |
| 5 | // ... |
| | |
| | |
| 5 | // ... |
| | |
-| 6 | final Logger logger = LoggerFactory.getLogger(this.getClass()); |
+| 6 | final Logger logger = LoggerFactory.getLogger(this.getClass()); |
-| 7 | final Marker marker = MarkerFactory.getMarker("MY\_MARKER"); |
+| 7 | final Marker marker = MarkerFactory.getMarker("MY\_MARKER"); |
-| 8 | logger.warn(marker, "This warning has a 'MY\_MARKER' annotation."); |
+| 8 | logger.warn(marker, "This warning has a 'MY\_MARKER' annotation."); |
+-----+-----------------------------------------------------------------------+
EELF does not allow Markers to be set directly. See notes on
+-----+-----------------------------------------------------------------------+
EELF does not allow Markers to be set directly. See notes on
-the \ **InvocationID** MDC.
+the \ **InvocationID** MDC.
+Serializing
+-----------
Marker names also need to be escaped, though they're much less likely to
contain problematic characters than MDC values.
Marker names also need to be escaped, though they're much less likely to
contain problematic characters than MDC values.
| 1 | %replace(%replace(%marker){'\\t','\\\\\\\\t'}){'\\n','\\\\\\\\n'} |
+-----+---------------------------------------------------------------------+
| 1 | %replace(%replace(%marker){'\\t','\\\\\\\\t'}){'\\n','\\\\\\\\n'} |
+-----+---------------------------------------------------------------------+
+Marker - ENTRY
+--------------
This should be reported as early in invocation as possible, immediately
This should be reported as early in invocation as possible, immediately
-after setting the \ **RequestID** and **InvocationID** MDCs.
+after setting the \ **RequestID** and **InvocationID** MDCs.
-It can be automatically set by EELF, and written to the AUDIT log.
+It can be automatically set by EELF, and written to the AUDIT log.
-It must be manually set otherwise.
+It must be manually set otherwise.
| 1 | //TODO |
+-----+----------+
| 1 | //TODO |
+-----+----------+
**SLF4J**
+-----+------------------------------------------------------------------------+
**SLF4J**
+-----+------------------------------------------------------------------------+
-| 1 | public static final Marker ENTRY = MarkerFactory.getMarker("ENTRY"); |
+| 1 | public static final Marker ENTRY = MarkerFactory.getMarker("ENTRY"); |
| | |
| 2 | // ... |
| | |
| | |
| 2 | // ... |
| | |
-| 3 | final Logger logger = LoggerFactory.getLogger(this.getClass()); |
+| 3 | final Logger logger = LoggerFactory.getLogger(this.getClass()); |
-| 4 | logger.debug(ENTRY, "Entering."); |
+| 4 | logger.debug(ENTRY, "Entering."); |
+-----+------------------------------------------------------------------------+
+-----+------------------------------------------------------------------------+
+Marker - EXIT
+-------------
This should be reported as late in invocation as possible, immediately
This should be reported as late in invocation as possible, immediately
-before unsetting the \ **RequestID** and **InvocationID** MDCs.
+before unsetting the \ **RequestID** and **InvocationID** MDCs.
It can be automatically reported by EELF, and written to the METRIC
It can be automatically reported by EELF, and written to the METRIC
It must be manually set otherwise.
It must be manually set otherwise.
| 1 | //TODO |
+-----+----------+
| 1 | //TODO |
+-----+----------+
**SLF4J**
+-----+----------------------------------------------------------------------+
**SLF4J**
+-----+----------------------------------------------------------------------+
-| 1 | public static final Marker EXIT = MarkerFactory.getMarker("EXIT"); |
+| 1 | public static final Marker EXIT = MarkerFactory.getMarker("EXIT"); |
| | |
| 2 | // ... |
| | |
| | |
| 2 | // ... |
| | |
-| 3 | final Logger logger = LoggerFactory.getLogger(this.getClass()); |
+| 3 | final Logger logger = LoggerFactory.getLogger(this.getClass()); |
-| 4 | logger.debug(EXIT, "Exiting."); |
+| 4 | logger.debug(EXIT, "Exiting."); |
+-----+----------------------------------------------------------------------+
+-----+----------------------------------------------------------------------+
+Marker - INVOKE
+---------------
This should be reported by the caller of another ONAP component via
This should be reported by the caller of another ONAP component via
-REST, including a newly allocated \ **InvocationID**, which will be
-passed to the caller.
+REST, including a newly allocated \ **InvocationID**, which will be
+passed to the caller.
**SLF4J**
+------+--------------------------------------------------------------------------+
**SLF4J**
+------+--------------------------------------------------------------------------+
-| 1 | public static final Marker INVOKE = MarkerFactory.getMarker("INVOKE"); |
+| 1 | public static final Marker INVOKE = MarkerFactory.getMarker("INVOKE"); |
| | |
| 2 | // ... |
| | |
| | |
| 2 | // ... |
| | |
| | |
| 4 | // Generate and report invocation ID. |
| | |
| | |
| 4 | // Generate and report invocation ID. |
| | |
-| 6 | final String invocationID = UUID.randomUUID().toString(); |
+| 6 | final String invocationID = UUID.randomUUID().toString(); |
| | |
| 7 | MDC.put(MDC\_INVOCATION\_ID, invocationID); |
| | |
| | |
| 7 | MDC.put(MDC\_INVOCATION\_ID, invocationID); |
| | |
-| 9 | logger.debug(INVOKE\_SYNCHRONOUS, "Invoking synchronously ... "); |
+| 9 | logger.debug(INVOKE\_SYNCHRONOUS, "Invoking synchronously ... "); |
-| 12 | MDC.remove(MDC\_INVOCATION\_ID); |
+| 12 | MDC.remove(MDC\_INVOCATION\_ID); |
| | |
| 15 | // Pass invocationID as HTTP X-InvocationID header. |
| | |
| | |
| 15 | // Pass invocationID as HTTP X-InvocationID header. |
| | |
| | |
| 17 | callDownstreamSystem(invocationID, ... ); |
+------+--------------------------------------------------------------------------+
**TODO: EELF, without changing published APIs.**
| | |
| 17 | callDownstreamSystem(invocationID, ... ); |
+------+--------------------------------------------------------------------------+
**TODO: EELF, without changing published APIs.**
-**Marker - SYNCHRONOUS**
+Marker - SYNCHRONOUS
+------------------------
-This should accompany \ **INVOKE** when the invocation is synchronous.
+This should accompany \ **INVOKE** when the invocation is synchronous.
**SLF4J**
+------+-------------------------------------------------------------------------+
**SLF4J**
+------+-------------------------------------------------------------------------+
-| 1 | public static final Marker INVOKE\_SYNCHRONOUS; |
+| 1 | public static final Marker INVOKE\_SYNCHRONOUS; |
-| 3 | INVOKE\_SYNCHRONOUS = MarkerFactory.getMarker("INVOKE"); |
+| 3 | INVOKE\_SYNCHRONOUS = MarkerFactory.getMarker("INVOKE"); |
-| 4 | INVOKE\_SYNCHRONOUS.add(MarkerFactory.getMarker("SYNCHRONOUS")); |
+| 4 | INVOKE\_SYNCHRONOUS.add(MarkerFactory.getMarker("SYNCHRONOUS")); |
| | |
| 5 | } |
| | |
| 6 | // ... |
| | |
| | |
| 5 | } |
| | |
| 6 | // ... |
| | |
| | |
| 8 | // Generate and report invocation ID. |
| | |
| | |
| 8 | // Generate and report invocation ID. |
| | |
-| 10 | final String invocationID = UUID.randomUUID().toString(); |
+| 10 | final String invocationID = UUID.randomUUID().toString(); |
| | |
| 11 | MDC.put(MDC\_INVOCATION\_ID, invocationID); |
| | |
| | |
| 11 | MDC.put(MDC\_INVOCATION\_ID, invocationID); |
| | |
-| 13 | logger.debug(INVOKE\_SYNCHRONOUS, "Invoking synchronously ... "); |
+| 13 | logger.debug(INVOKE\_SYNCHRONOUS, "Invoking synchronously ... "); |
-| 16 | MDC.remove(MDC\_INVOCATION\_ID); |
+| 16 | MDC.remove(MDC\_INVOCATION\_ID); |
| | |
| 19 | // Pass invocationID as HTTP X-InvocationID header. |
| | |
| | |
| 19 | // Pass invocationID as HTTP X-InvocationID header. |
| | |
| | |
| 21 | callDownstreamSystem(invocationID, ... ); |
+------+-------------------------------------------------------------------------+
| | |
| 21 | callDownstreamSystem(invocationID, ... ); |
+------+-------------------------------------------------------------------------+
-**TODO: EELF, without changing published APIs. **
+**TODO: EELF, without changing published APIs.**
-Errorcodes are reported as MDCs.
+Errorcodes are reported as MDCs.
Exceptions should be accompanied by an errrorcode. Typically this is
achieved by incorporating errorcodes into your exception hierarchy and
error handling. ONAP components generally do not share this kind of
code, though EELF defines a marker interface (meaning it has no
Exceptions should be accompanied by an errrorcode. Typically this is
achieved by incorporating errorcodes into your exception hierarchy and
error handling. ONAP components generally do not share this kind of
code, though EELF defines a marker interface (meaning it has no
-methods) \ **EELFResolvableErrorEnum**.
+methods) \ **EELFResolvableErrorEnum**.
A common convention is for errorcodes to have two components:
A common convention is for errorcodes to have two components:
-1. A \ **prefix**, which identifies the origin of the error.
+1. A \ **prefix**, which identifies the origin of the error.
-2. A \ **suffix**, which identifies the kind of error.
+2. A \ **suffix**, which identifies the kind of error.
Suffixes may be numeric or text. They may also be common to more than
one component.
Suffixes may be numeric or text. They may also be common to more than
one component.
+-----+-------------------------------+
Output Format
+-----+-------------------------------+
Output Format
-1. Logs should be human-readable (within reason).
+1. Logs should be human-readable (within reason).
2. Shipper and indexing performance and durability depends on logs that
can be parsed quickly and reliably.
3. Consistency means fewer shipping and indexing rules are required.
2. Shipper and indexing performance and durability depends on logs that
can be parsed quickly and reliably.
3. Consistency means fewer shipping and indexing rules are required.
+***********
+Text Output
+***********
ONAP needs to strike a balance between human-readable and
machine-readable logs. This means:
ONAP needs to strike a balance between human-readable and
machine-readable logs. This means:
-- The use of tab (**\\t**) as a delimiter.
+- The use of tab (**\\t**) as a delimiter.
- Escaping all messages, exceptions, MDC values, Markers, etc. to
replace tabs in their content.
- Escaping all messages, exceptions, MDC values, Markers, etc. to
replace tabs in their content.
-- Escaping all newlines with \ **\\n** so that each entry is on one
- line.
+- Escaping all newlines with \ **\\n** so that each entry is on one
+ line.
In logback, this looks like:
+-----+-------------------------------------------------------------------------------+
In logback, this looks like:
+-----+-------------------------------------------------------------------------------+
-| 1 | <property name="defaultPattern" value="%nopexception%logger |
+| 1 | <property name="defaultPattern" value="%nopexception%logger |
| | |
| 2 | \\t%date{yyyy-MM-dd'T'HH:mm:ss.SSSXXX,UTC} |
| | |
| | |
| 2 | \\t%date{yyyy-MM-dd'T'HH:mm:ss.SSSXXX,UTC} |
| | |
| 9 | \\t%n"/> |
+-----+-------------------------------------------------------------------------------+
| 9 | \\t%n"/> |
+-----+-------------------------------------------------------------------------------+
-The output of which, with MDCs, a Marker and a nested exception, with
-newlines added for readability looks like:
+The output of which, with MDCs, a Marker and a nested exception, with newlines added for readability looks like:
Default Logstash indexing rules understand output in this format.
Default Logstash indexing rules understand output in this format.
+**********
+XML Output
+**********
For Log4j 1.X output, since escaping is not supported, the best
For Log4j 1.X output, since escaping is not supported, the best
-alternative is to emit logs in XML format.
+alternative is to emit logs in XML format.
There may be other instances where XML (or JSON) output may be
There may be other instances where XML (or JSON) output may be
-desirable. Default indexing rules support
+desirable. Default indexing rules support
-Default Logstash indexing rules understand the XML output of \ `*Log4J's
+Default Logstash indexing rules understand the XML output of \ `*Log4J's
XMLLayout* <https://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/xml/XMLLayout.html>`__.
Output Location
XMLLayout* <https://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/xml/XMLLayout.html>`__.
Output Location
Standardization of output locations makes logs easier to locate and ship
Standardization of output locations makes logs easier to locate and ship
-Logfiles should default to beneath \ **/var/log**, and
-beneath \ **/var/log/ONAP** in the case of core ONAP components:
+Logfiles should default to beneath \ **/var/log**, and
+beneath \ **/var/log/ONAP** in the case of core ONAP components:
+-----+-----------------------------------------------------+
| 1 | /var/log/ONAP/<component>[/<subcomponent>]/\*.log |
+-----+-----------------------------------------------------+
Configuration
+-----+-----------------------------------------------------+
| 1 | /var/log/ONAP/<component>[/<subcomponent>]/\*.log |
+-----+-----------------------------------------------------+
Configuration
Logging providers should be configured by file. Files should be at a
predictable, static location, so that they can be written by deployment
Logging providers should be configured by file. Files should be at a
predictable, static location, so that they can be written by deployment
-automation. Ideally this should be under \ **/etc/ONAP**, but compliance
+automation. Ideally this should be under \ **/etc/ONAP**, but compliance
-All logger provider configuration document locations namespaced by
+All logger provider configuration document locations namespaced by
component and (if applicable) subcomponent by default:
+-----+---------------------------------------------------------+
| 1 | /etc/onap/<component>[/<subcomponent>]/<provider>.xml |
+-----+---------------------------------------------------------+
component and (if applicable) subcomponent by default:
+-----+---------------------------------------------------------+
| 1 | /etc/onap/<component>[/<subcomponent>]/<provider>.xml |
+-----+---------------------------------------------------------+
-Where \ **<provider>.xml**, will typically be one of:
+Where \ **<provider>.xml**, will typically be one of:
+Reconfiguration
+===============
Logger providers should reconfigure themselves automatically when their
configuration file is rewritten. All major providers should support
Logger providers should reconfigure themselves automatically when their
configuration file is rewritten. All major providers should support
-The default interval is 10s.
+The default interval is 10s.
The location of the configuration file MAY be overrideable, for example
by an environment variable, but this is left for individual components
The location of the configuration file MAY be overrideable, for example
by an environment variable, but this is left for individual components
+Archetypes
+============
Configuration archetypes can be found in the ONAP codebase. Choose
according to your provider, and whether you're logging via EELF. Efforts
Configuration archetypes can be found in the ONAP codebase. Choose
according to your provider, and whether you're logging via EELF. Efforts
are where pipe (\|) is used as a separator. (Previously it was "\|").
Retention
are where pipe (\|) is used as a separator. (Previously it was "\|").
Retention
Logfiles are often large. Logging providers allow retention policies to
Logfiles are often large. Logging providers allow retention policies to
Retention has to balance:
Retention has to balance:
-- The need to index logs before they're removed.
+- The need to index logs before they're removed.
-- The need to retain logs for other (including regulatory) purposes.
+- The need to retain logs for other (including regulatory) purposes.
Defaults are subject to change. Currently they are:
Defaults are subject to change. Currently they are:
-1. Files <= 50MB before rollover.
+1. Files <= 50MB before rollover.
-2. Files retain for 30 days.
+2. Files retain for 30 days.
-3. Total files capped at 10GB.
+3. Total files capped at 10GB.
In Logback configuration XML:
+------+-------------------------------------------------------------------------------------------------------------+
In Logback configuration XML:
+------+-------------------------------------------------------------------------------------------------------------+
-| 1 | <appender name="file" class="ch.qos.logback.core.rolling.RollingFileAppender"> |
+| 1 | <appender name="file" class="ch.qos.logback.core.rolling.RollingFileAppender"> |
-| 2 | <file>${outputDirectory}/${outputFilename}.log</file> |
+| 2 | <file>${outputDirectory}/${outputFilename}.log</file> |
-| 3 | <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy"> |
+| 3 | <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy"> |
-| 4 | <fileNamePattern>${outputDirectory}/${outputFilename}.%d{yyyy-MM-dd}.%i.log.zip</fileNamePattern> |
+| 4 | <fileNamePattern>${outputDirectory}/${outputFilename}.%d{yyyy-MM-dd}.%i.log.zip</fileNamePattern> |
-| 5 | <maxFileSize>50MB</maxFileSize> |
+| 5 | <maxFileSize>50MB</maxFileSize> |
-| 6 | <maxHistory>30</maxHistory> |
+| 6 | <maxHistory>30</maxHistory> |
-| 7 | <totalSizeCap>10GB</totalSizeCap> |
+| 7 | <totalSizeCap>10GB</totalSizeCap> |
-| 8 | </rollingPolicy> |
+| 8 | </rollingPolicy> |
| | |
| 12 | </appender> |
+------+-------------------------------------------------------------------------------------------------------------+
Types of EELF Logs
| | |
| 12 | </appender> |
+------+-------------------------------------------------------------------------------------------------------------+
Types of EELF Logs
EELF guidelines stipulate that an application should output log records
to four separate files:
EELF guidelines stipulate that an application should output log records
to four separate files:
4. debug
This applies only to EELF logging. Components which log directly to a
4. debug
This applies only to EELF logging. Components which log directly to a
-provider may choose to emit the same set of logs, but most do not.
+provider may choose to emit the same set of logs, but most do not.
An audit log is required for EELF-enabled components, and provides a
summary view of the processing of a (e.g., transaction) request within
An audit log is required for EELF-enabled components, and provides a
summary view of the processing of a (e.g., transaction) request within
component.
Audit log records are intended to capture the high level view of
component.
Audit log records are intended to capture the high level view of
-activity within an ONAP component. Specifically, an API request handled
+activity within an ONAP component. Specifically, an API request handled
by an ONAP component is reflected in a single Audit log record that
captures the time the request was received, the time that processing was
completed, as well as other information about the API request (e.g., API
name, on whose behalf it was invoked, etc).
Metric Log
by an ONAP component is reflected in a single Audit log record that
captures the time the request was received, the time that processing was
completed, as well as other information about the API request (e.g., API
name, on whose behalf it was invoked, etc).
Metric Log
A metric log is required for EELF-enabled components, and provides a
more detailed view into the processing of a transaction within an
A metric log is required for EELF-enabled components, and provides a
more detailed view into the processing of a transaction within an
ONAP or non-ONAP entities.
Suboperations invoked as part of the processing of the API request are
ONAP or non-ONAP entities.
Suboperations invoked as part of the processing of the API request are
-logged in the Metrics log. For example, when a call is made to another
-ONAP component or external (i.e., non-ONAP) entity, a Metrics log record
+logged in the Metrics log. For example, when a call is made to another
+ONAP component or external (i.e., non-ONAP) entity, a Metrics log record
captures that call. In such a case, the Metrics log record indicates
captures that call. In such a case, the Metrics log record indicates
-(among other things) the time the call is made, when it returns, the
-entity that is called, and the API invoked on that entity. The Metrics
+(among other things) the time the call is made, when it returns, the
+entity that is called, and the API invoked on that entity. The Metrics
log record contain the same RequestID as the Audit log record so the two
can be correlated.
log record contain the same RequestID as the Audit log record so the two
can be correlated.
satisfy the API request captured in the Audit log record.
Error Log
satisfy the API request captured in the Audit log record.
Error Log
An error log is required for EELF-enabled components, and is intended to
An error log is required for EELF-enabled components, and is intended to
-capture info, warn, error and fatal conditions sensed (“exception
-handledâ\80\9d) by the software components.
+capture info, warn, error and fatal conditions sensed (œexception
+handledÂ\9d) by the software components.
A debug log is optional for EELF-enabled components, and is intended to
capture whatever data may be needed to debug and correct abnormal
conditions of the application.
Engine.out
A debug log is optional for EELF-enabled components, and is intended to
capture whatever data may be needed to debug and correct abnormal
conditions of the application.
Engine.out
Console logging may also be present, and is intended to capture
Console logging may also be present, and is intended to capture
-“system/infrastructure” records. That is stdout and stderr assigned to a
-single “engine.out” file in a directory configurable (e.g. as an
+system/infrastructure records. That is stdout and stderr assigned to a
+single œengine.out file in a directory configurable (e.g. as an
environment/shell variable) by operations personnel.
New ONAP Component Checklist
environment/shell variable) by operations personnel.
New ONAP Component Checklist
+============================
By following a few simple rules:
By following a few simple rules:
-- Your component's output will be indexed automatically.
+- Your component's output will be indexed automatically.
- Analytics will be able to trace invocation through your component.
Obligations fall into two categories:
- Analytics will be able to trace invocation through your component.
Obligations fall into two categories:
-1. Conventions regarding configuration, line format and output.
+1. Conventions regarding configuration, line format and output.
-2. Ensuring the propagation of contextual information.
+2. Ensuring the propagation of contextual information.
You must:
1. Choose a Logging provider and/or EELF. Decisions, decisions.
2. Create a configuration file based on an existing
You must:
1. Choose a Logging provider and/or EELF. Decisions, decisions.
2. Create a configuration file based on an existing
- archetype. See \ `*Configuration* <https://wiki.onap.org/display/DW/ONAP+Application+Logging+Guidelines+v1.1#ONAPApplicationLoggingGuidelinesv1.1-Configuration>`__.
+ archetype. See \ `*Configuration* <https://wiki.onap.org/display/DW/ONAP+Application+Logging+Guidelines+v1.1#ONAPApplicationLoggingGuidelinesv1.1-Configuration>`__.
3. Read your configuration file when your components initialize logging.
4. Write logs to a standard location so that they can be shipped by
3. Read your configuration file when your components initialize logging.
4. Write logs to a standard location so that they can be shipped by
- Filebeat for indexing. See \ `*Output
+ Filebeat for indexing. See \ `*Output
Location* <https://wiki.onap.org/display/DW/ONAP+Application+Logging+Guidelines+v1.1#ONAPApplicationLoggingGuidelinesv1.1-OutputLocation>`__.
5. Report transaction state:
Location* <https://wiki.onap.org/display/DW/ONAP+Application+Logging+Guidelines+v1.1#ONAPApplicationLoggingGuidelinesv1.1-OutputLocation>`__.
5. Report transaction state:
- a. Retrieve, default and propagate \ **RequestID**. See \ `*MDC -
+ a. Retrieve, default and propagate \ **RequestID**. See \ `*MDC -
RequestID* <https://wiki.onap.org/display/DW/ONAP+Application+Logging+Guidelines+v1.1#ONAPApplicationLoggingGuidelinesv1.1-MDC-RequestID>`__.
b. At each invocation of one ONAP component by another:
RequestID* <https://wiki.onap.org/display/DW/ONAP+Application+Logging+Guidelines+v1.1#ONAPApplicationLoggingGuidelinesv1.1-MDC-RequestID>`__.
b. At each invocation of one ONAP component by another:
- i. Initialize and propagate \ **InvocationID**. See \ `*MDC -
+ i. Initialize and propagate \ **InvocationID**. See \ `*MDC -
Invocation
ID* <https://wiki.onap.org/display/DW/ONAP+Application+Logging+Guidelines+v1.1#ONAPApplicationLoggingGuidelinesv1.1-MDC-InvocationID>`__.
Invocation
ID* <https://wiki.onap.org/display/DW/ONAP+Application+Logging+Guidelines+v1.1#ONAPApplicationLoggingGuidelinesv1.1-MDC-InvocationID>`__.
- ii. Report \ **INVOKE** and **SYNCHRONOUS** markers in caller.
+ ii. Report \ **INVOKE** and **SYNCHRONOUS** markers in caller.
- iii. Report \ **ENTRY** and **EXIT** markers in recipient.
+ iii. Report \ **ENTRY** and **EXIT** markers in recipient.
- They are unordered.
\ No newline at end of file
+ They are unordered.
\ No newline at end of file