add delete-cluster script

Author: sjpb

Diff for: dev/delete-cluster.py

@@ -0,0 +1,46 @@
+#!/usr/bin/env python
+
+"""
+Delete infrastructure for a cluster without using Terraform. Useful for CI clusters.
+
+Usage:
+    delete-cluster.py PREFIX
+
+Where PREFIX is the string at the start of the resource's names.
+It will list matching resources and prompt to confirm deletion.
+"""
+
+import sys, json, subprocess, pprint
+
+
+CLUSTER_RESOURCES = ['server', 'port', 'volume']
+
+def delete_cluster(cluster_prefix):
+    to_delete = {}
+    for resource_type in CLUSTER_RESOURCES:
+        to_delete[resource_type] = []
+        resource_list = subprocess.run(f'openstack {resource_type} list --format json', stdout=subprocess.PIPE, shell=True)
+        resources = json.loads(resource_list.stdout)
+        for item in resources:
+            try:
+                if item['Name'] is not None and item['Name'].startswith(cluster_prefix):
+                    print(resource_type, item['Name'], item['ID'])
+                    to_delete[resource_type].append(item)
+            except:
+                print(resource_type, item)
+                raise
+    if input('Delete these (y/n)?:') == 'y':
+        for resource_type in CLUSTER_RESOURCES:
+            items = [v['ID'] for v in to_delete[resource_type]]
+            if items:
+                # delete all resources of each type in a single call for speed:
+                subprocess.run(f"openstack {resource_type} delete {' '.join(items)}", stdout=subprocess.PIPE, shell=True)
+                print(f'Deleted {len(items)} {resource_type}s')
+    else:
+        print('Cancelled - no resources deleted')
+
+if __name__ == '__main__':
+    if len(sys.argv) != 2:
+        print('ERROR: Incorrect argument(s).\n' + __doc__)
+        exit(1)
+    delete_cluster(sys.argv[1])