+++ /dev/null
-#!/usr/bin/env python
-import getopt
-import logging
-import os
-import sys
-import time
-import random
-
-from kubernetes import client
-
-# extract env variables.
-namespace = os.environ['NAMESPACE']
-cert = os.environ['CERT']
-host = os.environ['KUBERNETES_SERVICE_HOST']
-token_path = os.environ['TOKEN']
-
-with open(token_path, 'r') as token_file:
- token = token_file.read().replace('\n', '')
-
-# setup logging
-log = logging.getLogger(__name__)
-handler = logging.StreamHandler(sys.stdout)
-formatter = logging.Formatter('%(asctime)s - %(levelname)s - %(message)s')
-handler.setFormatter(formatter)
-handler.setLevel(logging.INFO)
-log.addHandler(handler)
-log.setLevel(logging.INFO)
-
-configuration = client.Configuration()
-configuration.host = "https://" + host
-configuration.ssl_ca_cert = cert
-configuration.api_key['authorization'] = token
-configuration.api_key_prefix['authorization'] = 'Bearer'
-coreV1Api = client.CoreV1Api(client.ApiClient(configuration))
-api_instance = client.ExtensionsV1beta1Api(client.ApiClient(configuration))
-api = client.AppsV1beta1Api(client.ApiClient(configuration))
-batchV1Api = client.BatchV1Api(client.ApiClient(configuration))
-
-
-def is_job_complete(job_name):
- complete = False
- log.info("Checking if " + job_name + " is complete")
- try:
- response = batchV1Api.read_namespaced_job_status(job_name, namespace)
- if response.status.succeeded == 1:
- job_status_type = response.status.conditions[0].type
- if job_status_type == "Complete":
- complete = True
- log.info(job_name + " is complete")
- else:
- log.info(job_name + " is not complete")
- else:
- log.info(job_name + " has not succeeded yet")
- return complete
- except Exception as e:
- log.error("Exception when calling read_namespaced_job_status: %s\n" % e)
-
-
-def wait_for_statefulset_complete(statefulset_name):
- try:
- response = api.read_namespaced_stateful_set(statefulset_name, namespace)
- s = response.status
- if (s.replicas == response.spec.replicas and
- s.ready_replicas == response.spec.replicas and
- s.observed_generation == response.metadata.generation):
- log.info("Statefulset " + statefulset_name + " is ready")
- return True
- else:
- log.info("Statefulset " + statefulset_name + " is not ready")
- return False
- except Exception as e:
- log.error("Exception when waiting for Statefulset status: %s\n" % e)
-
-
-def wait_for_deployment_complete(deployment_name):
- try:
- response = api.read_namespaced_deployment(deployment_name, namespace)
- s = response.status
- if (s.unavailable_replicas is None and
- ( s.updated_replicas is None or s.updated_replicas == response.spec.replicas ) and
- s.replicas == response.spec.replicas and
- s.ready_replicas == response.spec.replicas and
- s.observed_generation == response.metadata.generation):
- log.info("Deployment " + deployment_name + " is ready")
- return True
- else:
- log.info("Deployment " + deployment_name + " is not ready")
- return False
- except Exception as e:
- log.error("Exception when waiting for deployment status: %s\n" % e)
-
-
-def wait_for_daemonset_complete(daemonset_name):
- try:
- response = api_instance.read_namespaced_daemon_set(daemonset_name, namespace)
- s = response.status
- if s.desired_number_scheduled == s.number_ready:
- log.info("DaemonSet: " + str(s.number_ready) + "/" + str(s.desired_number_scheduled) + " nodes ready --> " + daemonset_name + " is ready")
- return True
- else:
- log.info("DaemonSet: " + str(s.number_ready) + "/" + str(s.desired_number_scheduled) + " nodes ready --> " + daemonset_name + " is not ready")
- return False
- except Exception as e:
- log.error("Exception when waiting for DaemonSet status: %s\n" % e)
-
-
-def is_ready(container_name):
- ready = False
- log.info("Checking if " + container_name + " is ready")
- try:
- response = coreV1Api.list_namespaced_pod(namespace=namespace,
- watch=False)
- for i in response.items:
- # container_statuses can be None, which is non-iterable.
- if i.status.container_statuses is None:
- continue
- for s in i.status.container_statuses:
- if s.name == container_name:
- name = read_name(i)
- if i.metadata.owner_references[0].kind == "StatefulSet":
- ready = wait_for_statefulset_complete(name)
- elif i.metadata.owner_references[0].kind == "ReplicaSet":
- deployment_name = get_deployment_name(name)
- ready = wait_for_deployment_complete(deployment_name)
- elif i.metadata.owner_references[0].kind == "Job":
- ready = is_job_complete(name)
- elif i.metadata.owner_references[0].kind == "DaemonSet":
- ready = wait_for_daemonset_complete(i.metadata.owner_references[0].name)
-
- return ready
-
- else:
- continue
- return ready
- except Exception as e:
- log.error("Exception when calling list_namespaced_pod: %s\n" % e)
-
-
-def read_name(item):
- return item.metadata.owner_references[0].name
-
-
-def get_deployment_name(replicaset):
- api_response = api_instance.read_namespaced_replica_set_status(replicaset,
- namespace)
- deployment_name = read_name(api_response)
- return deployment_name
-
-
-DEF_TIMEOUT = 10
-DESCRIPTION = "Kubernetes container readiness check utility"
-USAGE = "Usage: ready.py [-t <timeout>] -c <container_name> " \
- "[-c <container_name> ...]\n" \
- "where\n" \
- "<timeout> - wait for container readiness timeout in min, " \
- "default is " + str(DEF_TIMEOUT) + "\n" \
- "<container_name> - name of the container to wait for\n"
-
-
-def main(argv):
- # args are a list of container names
- container_names = []
- timeout = DEF_TIMEOUT
- try:
- opts, args = getopt.getopt(argv, "hc:t:", ["container-name=",
- "timeout=",
- "help"])
- for opt, arg in opts:
- if opt in ("-h", "--help"):
- print("%s\n\n%s" % (DESCRIPTION, USAGE))
- sys.exit()
- elif opt in ("-c", "--container-name"):
- container_names.append(arg)
- elif opt in ("-t", "--timeout"):
- timeout = float(arg)
- except (getopt.GetoptError, ValueError) as e:
- print("Error parsing input parameters: %s\n" % e)
- print(USAGE)
- sys.exit(2)
- if container_names.__len__() == 0:
- print("Missing required input parameter(s)\n")
- print(USAGE)
- sys.exit(2)
-
- for container_name in container_names:
- timeout = time.time() + timeout * 60
- while True:
- ready = is_ready(container_name)
- if ready is True:
- break
- elif time.time() > timeout:
- log.warning("timed out waiting for '" + container_name +
- "' to be ready")
- exit(1)
- else:
- # spread in time potentially parallel execution in multiple
- # containers
- time.sleep(random.randint(5, 11))
-
-
-if __name__ == "__main__":
- main(sys.argv[1:])
-
Code Review / oom.git / blobdiff