feat: kms base64 plugin for e2e tests

Signed-off-by: Nilekh Chaudhari <1626598+nilekhc@users.noreply.github.com>

test/e2e/testing-manifests/auth/encrypt/encryption-config.yaml

@@ -4,7 +4,7 @@ resources:
   - resources:
     - secrets
     providers:
-    - secretbox:
-        keys:
-        - name: key1
-          secret: YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXoxMjM0NTY=
+    - kms:
+        apiVersion: v2
+        name: kmsprovider
+        endpoint: unix:///tmp/kms.socket

test/e2e/testing-manifests/auth/encrypt/kind.yaml

@@ -1,5 +1,10 @@
 kind: Cluster
 apiVersion: kind.x-k8s.io/v1alpha4
+# this containerd config patch sets the registry to the local registry where we push mock kms provider
+containerdConfigPatches:
+- |-
+  [plugins."io.containerd.grpc.v1.cri".registry.mirrors."localhost:5000"]
+    endpoint = ["http://kind-registry:5000"]
 nodes:
 - role: control-plane
   extraMounts:
@@ -7,12 +12,17 @@ nodes:
     hostPath: test/e2e/testing-manifests/auth/encrypt/encryption-config.yaml
     readOnly: true
     propagation: None
+  - containerPath: /etc/kubernetes/manifests/kubernetes-kms.yaml
+    hostPath: staging/src/k8s.io/kms/internal/plugins/mock/kms.yaml
+    readOnly: true
+    propagation: None
   kubeadmConfigPatches:
     - |
       kind: ClusterConfiguration
       apiServer:
         extraArgs:
           encryption-provider-config: "/etc/kubernetes/encryption-config.yaml"
+          feature-gates: "KMSv2=true"
           v: "5"
         extraVolumes:
         - name: encryption-config
@@ -20,6 +30,9 @@ nodes:
           mountPath: "/etc/kubernetes/encryption-config.yaml"
           readOnly: true
           pathType: File
+        - name: sock-path
+          hostPath: "/tmp"
+          mountPath: "/tmp"
       scheduler:
         extraArgs:
           v: "5"

test/e2e/testing-manifests/auth/encrypt/setup-cluster-prereqs.sh

@@ -0,0 +1,87 @@
+#!/usr/bin/env bash
+
+# Copyright 2023 The Kubernetes Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This script does following:
+# 1. Creates local registry if not already present. This registry is used to push the kms mock plugin image.
+# 2. Build and push the kms mock plugin image to the local registry.
+# 3. Connect local registry to kind network so that kind cluster created using kubetest2 in prow CI job can pull the kms mock plugin image.
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+# build_and_push_mock_plugin builds and pushes the kms mock plugin image to the local registry.
+build_and_push_mock_plugin() {
+    docker buildx build \
+        --no-cache \
+        --platform linux/amd64 \
+        --output=type=docker \
+        -t localhost:5000/mock-kms-provider:e2e \
+        -f staging/src/k8s.io/kms/internal/plugins/mock/Dockerfile staging/src/k8s.io/ \
+        --progress=plain;
+
+    docker push localhost:5000/mock-kms-provider:e2e
+}
+
+# create_registry creates local registry if not already present.
+create_registry() {
+    running="$(docker inspect -f '{{.State.Running}}' "kind-registry" 2>/dev/null || true)"
+    if [ "${running}" != 'true' ]; then
+        echo "Creating local registry"
+        docker run \
+            -d --restart=always -p "5000:5000" --name "kind-registry" \
+            registry:2
+    else 
+        echo "Local registry is already running"
+    fi
+}
+
+# connect_registry connects local registry to kind network.
+connect_registry(){
+    # wait for the kind network to exist
+    # infinite loop here is fine because kubetest2 will timeout if kind cluster creation fails and that will terminate the CI job
+    for ((; ;)); do
+        if docker network ls | grep "kind"; then
+            break
+        else
+            echo "'docker network ls' does not have 'kind' network to connect registry"
+            sleep 1
+    fi
+    done
+
+    containers=$(docker network inspect "kind" -f "{{range .Containers}}{{.Name}} {{end}}")
+    needs_connect="true"
+    for c in $containers; do
+        if [ "$c" = "kind-registry" ]; then
+            needs_connect="false"
+        fi
+    done
+
+    if [ "${needs_connect}" = "true" ]; then
+        echo "connecting kind network to kind-registry"
+        docker network connect "kind" "kind-registry"
+    else
+        echo "'kind' network is already connected to 'kind-registry'"
+    fi
+}
+
+main(){
+    create_registry
+    build_and_push_mock_plugin
+    connect_registry &
+}
+
+main