add chart testing on PRs

.circleci/config.yml

@@ -1,5 +1,23 @@
 version: 2
 jobs:
+  lint-charts:
+    docker:
+      - image: gcr.io/kubernetes-charts-ci/test-image:v3.3.2
+    steps:
+      - checkout
+      - run:
+          name: lint
+          command: |
+            git remote add upstream https://github.com/paulczar/percona-helm-charts
+            git fetch upstream master
+            ct lint --config .circleci/ct.yaml
+  install-charts:
+    machine: true
+    steps:
+      - checkout
+      - run:
+          no_output_timeout: 12m
+          command: .circleci/install_charts.sh
   lint-scripts:
     docker:
       - image: koalaman/shellcheck-alpine
@@ -22,12 +40,23 @@ jobs:
 
 workflows:
   version: 2
-  release:
+  lint-and-install:
     jobs:
       - lint-scripts
+      - lint-charts:
+          filters:
+            branches:
+              ignore: master
+            tags:
+              ignore: /.*/
+      - install-charts:
+          requires:
+            - lint-charts
+  release:
+    jobs:
       - release-charts:
           filters:
             tags:
               ignore: /.*/
             branches:
-              only: master
+              only: master

.circleci/ct.yaml

@@ -0,0 +1 @@
+helm-extra-args: --timeout 600

.circleci/install_charts.sh

@@ -0,0 +1,92 @@
+#!/usr/bin/env bash
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+readonly CT_VERSION=v2.3.3
+readonly KIND_VERSION=0.2.1
+readonly CLUSTER_NAME=chart-testing
+readonly K8S_VERSION=v1.14.0
+
+run_ct_container() {
+    echo 'Running ct container...'
+    docker run --rm --interactive --detach --network host --name ct \
+        --volume "$(pwd)/.circleci/ct.yaml:/etc/ct/ct.yaml" \
+        --volume "$(pwd):/workdir" \
+        --workdir /workdir \
+        "quay.io/helmpack/chart-testing:$CT_VERSION" \
+        cat
+    echo
+}
+
+cleanup() {
+    echo 'Removing ct container...'
+    docker kill ct > /dev/null 2>&1
+
+    echo 'Done!'
+}
+
+docker_exec() {
+    docker exec --interactive ct "$@"
+}
+
+create_kind_cluster() {
+    echo 'Installing kind...'
+
+    curl -sSLo kind "https://github.com/kubernetes-sigs/kind/releases/download/$KIND_VERSION/kind-linux-amd64"
+    chmod +x kind
+    sudo mv kind /usr/local/bin/kind
+
+    kind create cluster --name "$CLUSTER_NAME" --config .circleci/kind-config.yaml --image "kindest/node:$K8S_VERSION" --wait 60s
+
+    docker_exec mkdir -p /root/.kube
+
+    echo 'Copying kubeconfig to container...'
+    local kubeconfig
+    kubeconfig="$(kind get kubeconfig-path --name "$CLUSTER_NAME")"
+    docker cp "$kubeconfig" ct:/root/.kube/config
+
+    docker_exec kubectl cluster-info
+    echo
+
+    docker_exec kubectl get nodes
+    echo
+}
+
+install_local_path_provisioner() {
+    docker_exec kubectl delete storageclass standard
+    docker_exec kubectl apply -f https://raw.githubusercontent.com/rancher/local-path-provisioner/master/deploy/local-path-storage.yaml
+}
+
+install_tiller() {
+    echo 'Installing Tiller...'
+    docker_exec kubectl --namespace kube-system create sa tiller
+    docker_exec kubectl create clusterrolebinding tiller-cluster-rule --clusterrole=cluster-admin --serviceaccount=kube-system:tiller
+    docker_exec helm init --service-account tiller --upgrade --wait
+    echo
+}
+
+install_charts() {
+    docker_exec ct install
+    echo
+}
+
+main() {
+    run_ct_container
+    trap cleanup EXIT
+
+    changed=$(docker_exec ct list-changed)
+    if [[ -z "$changed" ]]; then
+        echo 'No chart changes detected.'
+        return
+    fi
+
+    echo 'Chart changes detected.'
+    create_kind_cluster
+    install_local_path_provisioner
+    install_tiller
+    install_charts
+}
+
+main

.circleci/kind-config.yaml

@@ -0,0 +1,6 @@
+kind: Cluster
+apiVersion: kind.sigs.k8s.io/v1alpha3
+nodes:
+  - role: control-plane
+  - role: worker
+  - role: worker