instance wide configuration (#1010)

TODO:
* [x] add setting initial set of admins during deployment

src/deployment/set_admins.py

@@ -0,0 +1,60 @@
+#!/usr/bin/env python
+#
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+
+import argparse
+import json
+from typing import List, Optional
+from uuid import UUID
+
+from azure.common.client_factory import get_client_from_cli_profile
+from azure.cosmosdb.table.tableservice import TableService
+from azure.mgmt.storage import StorageManagementClient
+
+TABLE_NAME = "InstanceConfig"
+
+
+def create_if_missing(table_service: TableService) -> None:
+    if not table_service.exists(TABLE_NAME):
+        table_service.create_table(TABLE_NAME)
+
+
+def update_admins(
+    table_service: TableService, resource_group: str, admins: List[UUID]
+) -> None:
+    create_if_missing(table_service)
+    admins_as_str: Optional[List[str]] = None
+    if admins:
+        admins_as_str = [str(x) for x in admins]
+
+    table_service.insert_or_merge_entity(
+        TABLE_NAME,
+        {
+            "PartitionKey": resource_group,
+            "RowKey": resource_group,
+            "admins": json.dumps(admins_as_str),
+        },
+    )
+
+
+def main() -> None:
+    formatter = argparse.ArgumentDefaultsHelpFormatter
+    parser = argparse.ArgumentParser(formatter_class=formatter)
+    parser.add_argument("resource_group")
+    parser.add_argument("storage_account")
+    parser.add_argument("admins", type=UUID, nargs="*")
+    args = parser.parse_args()
+
+    client = get_client_from_cli_profile(StorageManagementClient)
+    storage_keys = client.storage_accounts.list_keys(
+        args.resource_group, args.storage_account
+    )
+    table_service = TableService(
+        account_name=args.storage_account, account_key=storage_keys.keys[0].value
+    )
+    update_admins(table_service, args.resource_group, args.admins)
+
+
+if __name__ == "__main__":
+    main()