Create test to check for mandatory services

Signed-off-by: josephineSei <[email protected]>

Tests/iaas/mandatory-services/mandatory-iaas-services.py

@@ -0,0 +1,94 @@
+"""Mandatory APIs checker
+
+This script retrieves the endpoint catalog from Keystone using the OpenStack
+SDK and checks whether all mandatory APi endpoints, are present.
+The script relies on an OpenStack SDK compatible clouds.yaml file for
+authentication with Keystone.
+As the s3 endpoint might differ, a missing one will only result in a warning.
+"""
+
+import argparse
+import getpass
+import logging
+import os
+
+import openstack
+
+
+logger = logging.getLogger(__name__)
+mandatory_services = ["compute", "identity", "image", "block-storage",
+                      "network", "load-balancer", "s3", "placement"]
+
+
+def connect(cloud_name: str) -> openstack.connection.Connection:
+    """Create a connection to an OpenStack cloud
+    :param string cloud_name:
+        The name of the configuration to load from clouds.yaml.
+    :returns: openstack.connnection.Connection
+    """
+    return openstack.connect(
+        cloud=cloud_name,
+    )
+
+
+def check_presence_of_mandatory_services(cloud_name: str):
+    try:
+        connection = connect(cloud_name)
+        services = connection.service_catalog
+    except Exception as e:
+        print(str(e))
+        raise Exception(
+            f"Connection to cloud '{cloud_name}' was not successfully. "
+            f"The Catalog endpoint could not be accessed. "
+            f"Please check your cloud connection and authorization."
+        )
+
+    for svc in services:
+        svc_type = svc['type']
+        if svc_type in mandatory_services:
+            mandatory_services.remove(svc_type)
+
+    if not mandatory_services:
+        # every mandatory service API had an endpoint
+        return 0
+    else:
+        # if only s3 is not available, that might be named differently
+        if mandatory_services == ["s3"]:
+            logger.warning("No s3 endpoint found.")
+            return 0
+        else:
+            # there were multiple mandatory APIs not found
+            logger.error(f"The following endpoints are missing: "
+                         f"{mandatory_services}")
+            return len(mandatory_services)
+
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="SCS Mandatory IaaS Service Checker")
+    parser.add_argument(
+        "--os-cloud", type=str,
+        help="Name of the cloud from clouds.yaml, alternative "
+        "to the OS_CLOUD environment variable"
+    )
+    parser.add_argument(
+        "--debug", action="store_true",
+        help="Enable OpenStack SDK debug logging"
+    )
+    args = parser.parse_args()
+    openstack.enable_logging(debug=args.debug)
+
+    # parse cloud name for lookup in clouds.yaml
+    cloud = os.environ.get("OS_CLOUD", None)
+    if args.os_cloud:
+        cloud = args.os_cloud
+    assert cloud, (
+        "You need to have the OS_CLOUD environment variable set to your cloud "
+        "name or pass it via --os-cloud"
+    )
+
+    return check_presence_of_mandatory_services(cloud)
+
+
+if __name__ == "__main__":
+    main()