xDS interop: Generate deployment_id match label (#30596)

This fixes an issue with KubernetesNamespace.list_deployment_pods()
as well as the deployment itself would select incorrect pods
when multiple deployments share the same namespace.

tools/run_tests/xds_k8s_test_driver/framework/test_app/runners/k8s/k8s_base_runner.py

@@ -25,6 +25,7 @@ import yaml
 
 import framework.helpers.datetime
 import framework.helpers.highlighter
+import framework.helpers.rand
 from framework.infrastructure import gcp
 from framework.infrastructure import k8s
 from framework.test_app.runners import base_runner
@@ -198,6 +199,12 @@ class KubernetesBaseRunner(base_runner.BaseRunner):
         return resource
 
     def _create_deployment(self, template, **kwargs) -> k8s.V1Deployment:
+        # Automatically apply random deployment_id to use in the matchLabels
+        # to prevent selecting pods in the same namespace belonging to
+        # a different deployment.
+        if 'deployment_id' not in kwargs:
+            kwargs['deployment_id'] = framework.helpers.rand.rand_string(
+                lowercase=True)
         deployment = self._create_from_template(template, **kwargs)
         if not isinstance(deployment, k8s.V1Deployment):
             raise _RunnerError('Expected V1Deployment to be created '

tools/run_tests/xds_k8s_test_driver/kubernetes-manifests/client-secure.deployment.yaml

@@ -6,16 +6,19 @@ metadata:
   namespace: ${namespace_name}
   labels:
     app: ${deployment_name}
+    deployment_id: ${deployment_id}
     owner: xds-k8s-interop-test
 spec:
   replicas: 1
   selector:
     matchLabels:
       app: ${deployment_name}
+      deployment_id: ${deployment_id}
   template:
     metadata:
       labels:
         app: ${deployment_name}
+        deployment_id: ${deployment_id}
         owner: xds-k8s-interop-test
       annotations:
         security.cloud.google.com/use-workload-certificates: ""

tools/run_tests/xds_k8s_test_driver/kubernetes-manifests/client.deployment.yaml

@@ -6,16 +6,19 @@ metadata:
   namespace: ${namespace_name}
   labels:
     app: ${deployment_name}
+    deployment_id: ${deployment_id}
     owner: xds-k8s-interop-test
 spec:
   replicas: 1
   selector:
     matchLabels:
       app: ${deployment_name}
+      deployment_id: ${deployment_id}
   template:
     metadata:
       labels:
         app: ${deployment_name}
+        deployment_id: ${deployment_id}
         owner: xds-k8s-interop-test
     spec:
       % if service_account_name:

tools/run_tests/xds_k8s_test_driver/kubernetes-manifests/server-secure.deployment.yaml

@@ -6,18 +6,21 @@ metadata:
   namespace: ${namespace_name}
   labels:
     app: ${deployment_name}
+    deployment_id: ${deployment_id}
     owner: xds-k8s-interop-test
 spec:
   replicas: ${replica_count}
   selector:
     matchLabels:
       app: ${deployment_name}
+      deployment_id: ${deployment_id}
   template:
     metadata:
       annotations:
         security.cloud.google.com/use-workload-certificates: ""
       labels:
         app: ${deployment_name}
+        deployment_id: ${deployment_id}
         owner: xds-k8s-interop-test
     spec:
       serviceAccountName: ${service_account_name}

tools/run_tests/xds_k8s_test_driver/kubernetes-manifests/server.deployment.yaml

@@ -6,16 +6,19 @@ metadata:
   namespace: ${namespace_name}
   labels:
     app: ${deployment_name}
+    deployment_id: ${deployment_id}
     owner: xds-k8s-interop-test
 spec:
   replicas: ${replica_count}
   selector:
     matchLabels:
       app: ${deployment_name}
+      deployment_id: ${deployment_id}
   template:
     metadata:
       labels:
         app: ${deployment_name}
+        deployment_id: ${deployment_id}
         owner: xds-k8s-interop-test
     spec:
       % if service_account_name: