--- /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.updated_replicas == response.spec.replicas and
+ s.replicas == response.spec.replicas and
+ s.ready_replicas == response.spec.replicas and
+ s.current_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 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)
+
+ 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_reference[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