Merge pull request #46893 from yguo0905/image-spec

Automatic merge from submit-queue (batch tested with PRs 48890, 46893, 48872, 48896)

Support customized system spec in the node conformance test and create the GKE system spec

ref: https://github.com/kubernetes/kubernetes/issues/46891

- System specs are located in `test/e2e_node/system/specs`. Created one for validating GKE images in `test/e2e_node/system/specs/gke.yaml`.
- `--image-spec-name` can be used to specify a system spec in node e2e and conformance tests. This option maps to `SYSTEM_SPEC_NAME` in a test properties file, which is the user facing configuration. So, users can specify `SYSTEM_SPEC_NAME=gke` to run the image validation using the GKE system spec.
- If `SYSTEM_SPEC_NAME` is unspecified, the default spec (`system.DefaultSysSpec`) will be used.
- We can also use `make test-e2e-node SYSTEM_SPEC_NAME=gke` to run tests using GKE image spec.

**Release note**:
`None`

hack/make-rules/test-e2e-node.sh

@@ -33,6 +33,7 @@ container_runtime_endpoint=${CONTAINER_RUNTIME_ENDPOINT:-""}
 image_service_endpoint=${IMAGE_SERVICE_ENDPOINT:-""}
 run_until_failure=${RUN_UNTIL_FAILURE:-"false"}
 test_args=${TEST_ARGS:-""}
+system_spec_name=${SYSTEM_SPEC_NAME:-}
 
 # Parse the flags to pass to ginkgo
 ginkgoflags=""
@@ -135,7 +136,7 @@ if [ $remote = true ] ; then
     --results-dir="$artifacts" --ginkgo-flags="$ginkgoflags" \
     --image-project="$image_project" --instance-name-prefix="$instance_prefix" \
     --delete-instances="$delete_instances" --test_args="$test_args" --instance-metadata="$metadata" \
-    --image-config-file="$image_config_file" \
+    --image-config-file="$image_config_file" --system-spec-name="$system_spec_name" \
     2>&1 | tee -i "${artifacts}/build-log.txt"
   exit $?
 
@@ -163,7 +164,8 @@ else
 
   # Test using the host the script was run on
   # Provided for backwards compatibility
-  go run test/e2e_node/runner/local/run_local.go --ginkgo-flags="$ginkgoflags" \
+  go run test/e2e_node/runner/local/run_local.go \
+    --system-spec-name="$system_spec_name" --ginkgo-flags="$ginkgoflags" \
     --test-flags="--container-runtime=${runtime} \
     --container-runtime-endpoint=${container_runtime_endpoint} \
     --image-service-endpoint=${image_service_endpoint} \

hack/verify-flags/known-flags.txt

@@ -673,6 +673,8 @@ system-cgroups
 system-pods-startup-timeout
 system-reserved
 system-reserved-cgroup
+system-spec-file
+system-spec-name
 system-validate-mode
 target-port
 target-ram-mb