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-rw-r--r--cloudify-onap/docker-custom-readiness/ready.py85
1 files changed, 85 insertions, 0 deletions
diff --git a/cloudify-onap/docker-custom-readiness/ready.py b/cloudify-onap/docker-custom-readiness/ready.py
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+++ b/cloudify-onap/docker-custom-readiness/ready.py
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+#!/usr/bin/python
+#from kubernetes import client, config
+import kubernetes
+import time, argparse, logging, sys, os, base64
+import yaml
+
+#setup logging
+log = logging.getLogger(__name__)
+handler = logging.StreamHandler(sys.stdout)
+handler.setFormatter(logging.Formatter('%(asctime)s - %(levelname)s - %(message)s'))
+handler.setLevel(logging.DEBUG)
+log.addHandler(handler)
+log.setLevel(logging.DEBUG)
+
+
+def is_ready(container_name):
+ log.info( "Checking if " + container_name + " is ready")
+
+ kubernetes.config.kube_config.KubeConfigLoader(config_dict=get_k8s_config_env()).load_and_set()
+ client = kubernetes.client
+ namespace = get_namespace_env()
+ v1 = client.CoreV1Api()
+
+ ready = False
+
+ try:
+ response = v1.list_namespaced_pod(namespace=namespace, watch=False)
+ for i in response.items:
+ for s in i.status.container_statuses:
+ if s.name == container_name:
+ log.debug ( "response %s" % response )
+ ready = s.ready
+ if not ready:
+ log.info( container_name + " is not ready.")
+ else:
+ log.info( container_name + " is ready!")
+ else:
+ continue
+ return ready
+ except Exception as e:
+ log.error("Exception when calling list_namespaced_pod: %s\n" % e)
+
+
+def get_k8s_config_env():
+ try:
+ k8s_config_env = os.environ.get("K8S_CONFIG_B64")
+ decoded = base64.b64decode(k8s_config_env)
+ return yaml.load(decoded)
+ except KeyError as ke:
+ raise Exception("K8S_CONFIG_B64 variable is not set.")
+
+
+def get_namespace_env():
+ try:
+ namespace_env = os.environ.get("NAMESPACE")
+ return namespace_env
+ except KeyError as ke:
+ raise Exception("NAMESPACE variable is not set.")
+
+
+def main(args):#from kubernetes import client, config
+
+ # args are a list of container names
+ for container_name in args:
+ # 5 min, TODO: make configurable
+ timeout = time.time() + 60 * 10
+ 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:
+ time.sleep(5)
+
+
+if __name__ == "__main__":
+ parser = argparse.ArgumentParser(description='Process some names.')
+ parser.add_argument('--container-name', action='append', required=True, help='A container name')
+ args = parser.parse_args()
+ arg_dict = vars(args)
+
+ for arg in arg_dict.itervalues():
+ main(arg)