Update webapp deployment flow for supporting custom domains (#963)

Part of https://www.notion.so/Support-custom-domains-in-deploy-laconic-com-18aa6b22d4728067a44ae27090c02ce5 and cerc-io/snowballtools-base#47

- Set `value` (IP address for `A` resource) in the DNS records
- Update `deploy-webapp-from-registry` command with an option to pass k8s cluster IP address (only required with fqdn policy `allow`)

Reviewed-on: cerc-io/stack-orchestrator#963
Reviewed-by: ashwin <ashwin@noreply.git.vdb.to>
Co-authored-by: Prathamesh Musale <prathamesh.musale0@gmail.com>
Co-committed-by: Prathamesh Musale <prathamesh.musale0@gmail.com>

stack_orchestrator/deploy/webapp/deploy_webapp_from_registry.py

@@ -54,6 +54,7 @@ def process_app_deployment_request(
     deployment_record_namespace,
     dns_record_namespace,
     default_dns_suffix,
+    dns_value,
     deployment_parent_dir,
     kube_config,
     image_registry,
@@ -251,6 +252,7 @@ def process_app_deployment_request(
         dns_record,
         dns_lrn,
         deployment_dir,
+        dns_value,
         app_deployment_request,
         webapp_deployer_record,
         logger,
@@ -304,6 +306,7 @@ def dump_known_requests(filename, requests, status="SEEN"):
     help="How to handle requests with an FQDN: prohibit, allow, preexisting",
     default="prohibit",
 )
+@click.option("--ip", help="IP address of the k8s deployment (to be set in DNS record)", default=None)
 @click.option("--record-namespace-dns", help="eg, lrn://laconic/dns", required=True)
 @click.option(
     "--record-namespace-deployments",
@@ -381,6 +384,7 @@ def command(  # noqa: C901
     only_update_state,
     dns_suffix,
     fqdn_policy,
+    ip,
     record_namespace_dns,
     record_namespace_deployments,
     dry_run,
@@ -429,6 +433,13 @@ def command(  # noqa: C901
         )
         sys.exit(2)
 
+    if fqdn_policy == "allow" and not ip:
+        print(
+            "--ip is required with 'allow' fqdn-policy",
+            file=sys.stderr,
+        )
+        sys.exit(2)
+
     tempdir = tempfile.mkdtemp()
     gpg = gnupg.GPG(gnupghome=tempdir)
 
@@ -665,6 +676,7 @@ def command(  # noqa: C901
                         record_namespace_deployments,
                         record_namespace_dns,
                         dns_suffix,
+                        ip,
                         os.path.abspath(deployment_parent_dir),
                         kube_config,
                         image_registry,

stack_orchestrator/deploy/webapp/util.py

@@ -689,6 +689,7 @@ def publish_deployment(
     dns_record,
     dns_lrn,
     deployment_dir,
+    dns_value=None,
     app_deployment_request=None,
     webapp_deployer_record=None,
     logger=None,
@@ -721,6 +722,8 @@ def publish_deployment(
     }
     if app_deployment_request:
         new_dns_record["record"]["request"] = app_deployment_request.id
+    if dns_value:
+        new_dns_record["record"]["value"] = dns_value
 
     if logger:
         logger.log("Publishing DnsRecord.")