.. This work is licensed under a Creative Commons Attribution 4.0 International License.
.. http://creativecommons.org/licenses/by/4.0

************
Installation
************

.. contents::
    :depth: 3

The installation of ONAP Policy is **automated** by design and can be done via Docker as a standalone system.  
Various tools, including healthcheck, logs, and Swagger can be used to ensure proper operation.

ONAP Policy Framework: Standalone Quick Start
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
This article explains how to build the ONAP Policy Framework and get it running in Docker as a standalone system. 
This article assumes that:

* You are using a *\*nix* operating system such as linux or macOS.
* You are using a directory called *git* off your home directory *(~/git)* for your git repositories
* Your local maven repository is in the location *~/.m2/repository*
* You have added settings to access the ONAP Nexus to your M2 configuration, see `Maven Settings Example <https://wiki.onap.org/display/DW/Setting+Up+Your+Development+Environment>`_ (bottom of the linked page)

The procedure documented in this article has been verified to work on a MacBook laptop running macOS Sierra Version 10.12.6 and a HP Z600 desktop running Ubuntu 16.04.3 LTS.

Cloning the ONAP repositories
-----------------------------

Run a script such as the script below to clone the required modules from the `ONAP git repository <https://gerrit.onap.org/r/#/admin/projects/?filter=policy>`_. This script clones the ONAP policy code and also clones some modules that ONAP Policy is dependent on.

ONAP Policy requires all the *policy* modules from the ONAP repository. It also requires the ONAP Parent *oparent* module and the ONAP ECOMP SDK *ecompsdkos* module.


.. code-block:: bash
   :caption: Typical ONAP Policy Framework Clone Script
   :linenos:

    #!/usr/bin/env bash
     
    ## script name for output
    MOD_SCRIPT_NAME=`basename $0`
     
    ## the ONAP clone directory, defaults to "onap"
    clone_dir="onap"
     
    ## the ONAP repos to clone
    onap_repos="\
    policy/api \
    policy/common \
    policy/docker \
    policy/drools-applications \
    policy/drools-pdp \
    policy/engine \
    policy/gui \
    policy/pap \
    policy/pdp"
     
    ##
    ## Help screen and exit condition (i.e. too few arguments)
    ##
    Help()
    {
        echo ""
        echo "$MOD_SCRIPT_NAME - clones all required ONAP git repositories"
        echo ""
        echo "       Usage:  $MOD_SCRIPT_NAME [-options]"
        echo ""
        echo "       Options"
        echo "         -d          - the ONAP clone directory, defaults to '.'"
        echo "         -h          - this help screen"
        echo ""
        exit 255;
    }
     
    ##
    ## read command line
    ##
    while [ $# -gt 0 ]
    do
        case $1 in
            #-d ONAP clone directory
            -d)
                shift
                if [ -z "$1" ]; then
                    echo "$MOD_SCRIPT_NAME: no clone directory"
                    exit 1
                fi
                clone_dir=$1
                shift
            ;;
     
            #-h prints help and exists
            -h)
                Help;exit 0;;
     
            *)    echo "$MOD_SCRIPT_NAME: undefined CLI option - $1"; exit 255;;
        esac
    done
     
    if [ -f "$clone_dir" ]; then
        echo "$MOD_SCRIPT_NAME: requested clone directory '$clone_dir' exists as file"
        exit 2
    fi
    if [ -d "$clone_dir" ]; then
        echo "$MOD_SCRIPT_NAME: requested clone directory '$clone_dir' exists as directory"
        exit 2
    fi
     
    mkdir $clone_dir
    if [ $? != 0 ]
    then
        echo cannot clone ONAP repositories, could not create directory '"'$clone_dir'"'
        exit 3
    fi
     
    for repo in $onap_repos
    do
        repoDir=`dirname "$repo"`
        repoName=`basename "$repo"`
     
        if [ ! -z $dirName ]
        then
            mkdir "$clone_dir/$repoDir"
            if [ $? != 0 ]
            then
                echo cannot clone ONAP repositories, could not create directory '"'$clone_dir/repoDir'"'
                exit 4
            fi
        fi
     
        git clone https://gerrit.onap.org/r/${repo} $clone_dir/$repo
    done
     
    echo ONAP has been cloned into '"'$clone_dir'"'


Execution of the script above results in the following directory hierarchy in your *~/git* directory:

    *  ~/git/onap
    *  ~/git/onap/policy
    *  ~/git/onap/policy/api
    *  ~/git/onap/policy/common
    *  ~/git/onap/policy/docker
    *  ~/git/onap/policy/drools-applications
    *  ~/git/onap/policy/drools-pdp
    *  ~/git/onap/policy/engine
    *  ~/git/onap/policy/gui
    *  ~/git/onap/policy/pap
    *  ~/git/onap/policy/pdp    


Building ONAP
-------------

**Step 1.** Optionally, for a completely clean build, remove the ONAP built modules from your local repository.

	.. code-block:: bash 
	
	    rm -fr ~/.m2/repository/org/onap
	    rm -fr ~/.m2/repository/org/openecomp
	    rm -fr ~/.m2/repisotory/com/att


**Step 2**.  A pom such as the one below can be used to build the ONAP Policy Framework modules. Create the *pom.xml* file in the directory *~/git/onap/policy*.

.. code-block:: xml 
   :caption: Typical pom.xml to build the ONAP Policy Framework
   :linenos:

    <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
        <groupId>org.onap</groupId>
        <artifactId>onap-policy</artifactId>
        <version>1.0.0-SNAPSHOT</version>
        <packaging>pom</packaging>
        <name>${project.artifactId}</name>
        <inceptionYear>2017</inceptionYear>
        <organization>
            <name>ONAP</name>
        </organization>
     
        <modules>
            <module>common</module>
            <module>engine</module>
            <module>pdp</module>
            <module>pap</module>
            <module>drools-pdp</module>
            <module>drools-applications</module>
            <module>api</module>
            <module>gui</module>
            <module>docker</module>
        </modules>
    </project>


**Step 3**. You can now build the ONAP framework

   *  On *Ubuntu*, just build the Policy Framework tests and all

		.. code-block:: bash 
		
	            cd ~/git/onap
	            mvn clean install 

   *  On *macOS*, you must build build the ONAP framework with tests turned off first. Then rebuild the framework with tests turned on and all tests will pass. Note: The reason for this behaviour will be explored later. 
    
		.. code-block:: bash 

	            cd ~/git/onap
	            mvn clean install -DskipTests
 	            mvn install
 

Building the ONAP Policy Framework Docker Images
------------------------------------------------
The instructions here are based on the instructions in the file *~/git/onap/policy/docker/README.md*.


**Step 1.** Build the policy engine docker image:

		.. code-block:: bash 

		    cd ~/git/onap/policy/engine/packages/docker/target
		    docker build -t onap/policy-pe policy-pe


**Step 2.** Build the Drools PDP docker image:

		.. code-block:: bash 

		    cd ~/git/onap/policy/drools-pdp/packages/docker/target
		    docker build -t onap/policy-drools policy-drools


**Step 3.** Build the Policy Nexus docker image:

		.. code-block:: bash 

		    cd ~/git/onap/policy/docker
		    docker build -t onap/policy-nexus policy-nexus


Starting the ONAP Policy Framework Docker Images
------------------------------------------------

In order to run the containers, you can use *docker-compose*. This uses the *docker-compose.yml* yaml file to bring up the ONAP Policy Framework.

**Step 1.** Make the file config/drools/drools-tweaks.sh executable.

		.. code-block:: bash 

		    chmod +x config/drools/drools-tweaks.sh


**Step 2.** Set the IP address to use to be an IP address of a suitable interface on your machine. Save the IP address into the file *config/pe/ip_addr.txt*.


**Step 3.** Set the environment variable *MTU* to be a suitable MTU size for the application.

		.. code-block:: bash 

		    export MTU=9126


**Step 4.** Determine if you want policies pre-loaded or not. By default, all the configuration and operational policies will be pre-loaded by the docker compose script. If you do not wish for that to happen, then export this variable:

		.. code-block:: bash 

		    export PRELOAD_POLICIES=false


**Step 5.** Run the system using *docker-compose*. Note that on some systems you may have to run the *docker-compose* command as root or using *sudo*. Note that this command takes a number of minutes to execute on a laptop or desktop computer.

		.. code-block:: bash 

		    docker-compose up


Installation Complete
---------------------

**You now have a full standalone ONAP Policy framework up and running!**


.. _Standalone Quick Start : https://wiki.onap.org/display/DW/ONAP+Policy+Framework%3A+Standalone+Quick+Start



End of Document