provide subnets ids directly to the tool via argument

resalloc_ibm_cloud/argparsers.py

@@ -4,6 +4,7 @@
 
 import argparse
 
+
 def default_arg_parser():
     """
     The part that every resalloc-ibm-cloud utility needs
@@ -45,10 +46,13 @@ def vm_arg_parser():
         "--no-floating-ip", action="store_true", help="Don't use floating IPs (for VPN)"
     )
     parser_create.add_argument(
-        "--zones",
+        "--subnets-ids",
+        type=str,
+        nargs="+",
         help=(
-            "Path to json file with zones as keys and subnet id as value."
-            'content of file will look like: {"jp-tok-1": "secret-subnet-id-123-abcd", ...}'
+            "Space separated list of subnets ids. In case zones are different than a"
+            " basic zone, then specify subnet id with zone colon separated like this:"
+            " zone-1:subnet-id-1 zone-2:subnet-id-2"
         ),
         required=True,
     )

resalloc_ibm_cloud/ibm_cloud_vm.py

@@ -3,7 +3,6 @@
 """
 
 
-import json
 import logging
 import pipes
 import os
@@ -132,8 +131,7 @@ def create_instance(service, instance_name, opts):
     """
 
     log = opts.log
-    with open(opts.zones, "r", encoding="utf-8") as zone_file:
-        zones = json.load(zone_file)
+    zone, subnet_id = _get_zone_and_subnet_id(opts)
 
     instance_prototype_model = {
         "keys": [{"id": opts.ssh_key_id}],
@@ -155,14 +153,14 @@ def create_instance(service, instance_name, opts):
         "primary_network_interface": {
             "name": "primary-network-interface",
             "subnet": {
-                "id": zones[opts.zone],
+                "id": subnet_id,
             },
             "security_groups": [
                 {"id": opts.security_group_id},
             ],
         },
         "zone": {
-            "name": urlparse(opts.se),
+            "name": zone,
         },
         "volume_attachments": [
             {
@@ -344,10 +342,6 @@ def main():
         opts.instance = "production" if "-prod-" in name else "devel"
 
     if opts.subparser == "create":
-        with open(opts.zones, "r", encoding="utf-8") as zone_file:
-            allowed_zones = list(json.load(zone_file).keys())
-
-        opts.zone = random.choice(allowed_zones)
         # detect_floating_ip_name(opts)
         create_instance(service, name, opts)
     elif opts.subparser == "delete":