onap on kubernetes source files

[oom.git] / kubernetes / readiness / docker / init / ready.py

diff --git a/kubernetes/readiness/docker/init/ready.py b/kubernetes/readiness/docker/init/ready.py
new file mode 100644 (file)
index 0000000..c5b55ee
--- /dev/null
+++ b/kubernetes/readiness/docker/init/ready.py
@@ -0,0 +1,76 @@
+#!/usr/bin/python
+from kubernetes import client, config
+import time, argparse, logging, sys, os
+
+#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', '')
+
+client.configuration.host = "https://" + host
+client.configuration.ssl_ca_cert = cert
+client.configuration.api_key['authorization'] = token
+client.configuration.api_key_prefix['authorization'] = 'Bearer'
+
+#setup logging
+log = logging.getLogger(__name__)
+handler = logging.StreamHandler(sys.stdout)
+handler.setFormatter(logging.Formatter('%(asctime)s - %(levelname)s - %(message)s'))
+handler.setLevel(logging.INFO)
+log.addHandler(handler)
+log.setLevel(logging.INFO)
+
+
+def is_ready(container_name):
+    log.info( "Checking if " + container_name + "  is ready")
+    # config.load_kube_config() # for local testing
+    # namespace='onap-sdc' # for local testing
+    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:
+                    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 main(args):
+    # 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)