Merge pull request kubernetes#50450 from aleksandra-malinowska/scalab…

…ility-tests-clean

Automatic merge from submit-queue

Add Cluster Autoscaler scalability test suite

This suite is intended for manually testing Cluster Autoscaler on large clusters. It isn't supposed to be run automatically (at least for now).

It can be run on Kubemark (with kubernetes#50440) with the following setup:
- start Kubemark with NUM_NODES=1 (as we require there to be exactly 1 replica per hollow-node replication controller in this setup)
- set kubemark-master machine type manually to appropriate type for the Kubemark cluster size. Maximum Kubemark cluster size reached in test run is defined by maxNodes constant, so for maxNodes=1000, please upgrade to n1-standard-32. Adjust if modifying maxNodes.
- start Cluster Autoscaler pod in the external cluster using image built from version with Kubemark cloud provider (release pending)
- for grabbing metrics from ClusterAutoscaler (with kubernetes#50382), add "--include-cluster-autoscaler=true" parameter in addition to regular flags for gathering components' metrics/resource usage during e2e tests

cc @bskiba

test/e2e/autoscaling/BUILD

@@ -11,6 +11,7 @@ go_library(
     name = "go_default_library",
     srcs = [
         "autoscaling_timer.go",
+        "cluster_autoscaler_scalability.go",
         "cluster_size_autoscaling.go",
         "dns_autoscaling.go",
         "framework.go",
@@ -33,9 +34,11 @@ go_library(
         "//vendor/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/fields:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/labels:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/types:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/util/errors:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/util/intstr:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/util/sets:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/util/strategicpatch:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/util/uuid:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/util/wait:go_default_library",
         "//vendor/k8s.io/client-go/kubernetes:go_default_library",