1 files changed, 122 insertions, 0 deletions
diff --git a/kubernetes/common/cassandra/resources/exec.py b/kubernetes/common/cassandra/resources/exec.py
new file mode 100644
index 0000000000..5b3ae33371
--- /dev/null
+++ b/kubernetes/common/cassandra/resources/exec.py
@@ -0,0 +1,122 @@
+#!/usr/bin/python
+import getopt
+import logging
+import os
+import sys
+import time
+
+from kubernetes import config
+from kubernetes.client import Configuration
+from kubernetes.client.apis import core_v1_api
+from kubernetes.client.rest import ApiException
+from kubernetes.stream import stream
+
+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)
+handler.setFormatter(logging.Formatter('%(asctime)s - %(levelname)s - %(message)s'))
+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'
+configuration.assert_hostname = False
+coreV1Api = client.CoreV1Api(client.ApiClient(configuration))
+api_instance = client.CoreV1Api(client.ApiClient(configuration))
+
+def run_command( pod_name, command ):
+        try:
+                exec_command = [
+                    '/bin/sh',
+                    '-c',
+                    command]
+                resp = stream(api_instance.connect_get_namespaced_pod_exec, pod_name, namespace,
+                      command=exec_command,
+                      stderr=True, stdin=False,
+                      stdout=True, tty=False)
+        except ApiException as e:
+                print("Exception when calling CoreV1Api->connect_get_namespaced_pod_exec: %s\n" % e)
+                return False
+        print(resp)
+        return True
+
+def find_pod(container_name,command,pods):
+    ready = False
+    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:
+                    if pods == True:
+                       print (i.metadata.name)
+                    else:
+                       ready = run_command(i.metadata.name,command)
+                else:
+                    continue
+    except Exception as e:
+        log.error("Exception when calling list_namespaced_pod: %s\n" % e)
+
+    return ready
+
+
+DESCRIPTION = "Kubernetes container readiness check utility"
+USAGE = "Usage: ready.py [-t <timeout>] -c <container_name> [-c <container_name> ...]\n" \
+        "where\n" \
+        "<container_name> - name of the container to wait for\n"
+
+def main(argv):
+    pods = False
+    command = ""
+    container_name = ""
+    try:
+        opts, args = getopt.getopt(argv, "ghp:c:", ["pod-container-name=", "command=", "help","getpods"])
+        for opt, arg in opts:
+            if opt in ("-h", "--help"):
+                print("%s\n\n%s" % (DESCRIPTION, USAGE))
+                sys.exit()
+            elif opt in ("-p", "--pod-container-name"):
+                container_name = arg
+            elif opt in ("-c", "--command"):
+                command = arg
+            elif opt in ("-g", "--getpods"):
+                pods = True
+    except (getopt.GetoptError, ValueError) as e:
+        print("Error parsing input parameters: %s\n" % e)
+        print(USAGE)
+        sys.exit(2)
+    if container_name.__len__() == 0:
+        print("Missing required input parameter(s)\n")
+        print(USAGE)
+        sys.exit(2)
+
+    if pods == False:
+            if command.__len__() == 0:
+                print("Missing required input parameter(s)\n")
+                print(USAGE)
+                sys.exit(2)
+    ready = find_pod(container_name,command,pods)
+    if ready == False:
+        sys.exit(2)
+
+if __name__ == "__main__":
+    main(sys.argv[1:])
+
+