Add Helm-2to3.gitlab-ci.yml to Auto DevOps

doc/topics/autodevops/upgrading_auto_deploy_dependencies.md

@@ -77,7 +77,7 @@ The v2 auto-deploy-image drops support for Kubernetes 1.15 and lower. If you nee
 Kubernetes cluster, follow your cloud provider's instructions. Here's
 [an example on GKE](https://cloud.google.com/kubernetes-engine/docs/how-to/upgrading-a-cluster).
 
-#### Helm 3
+#### Helm v3
 
 > [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/228609) in GitLab 13.4.
 
@@ -86,47 +86,38 @@ Previously, `auto-deploy-image` used Helm v2, which used Tiller in a cluster.
 In the v2 `auto-deploy-image`, it uses Helm v3 that doesn't require Tiller anymore.
 
 If your Auto DevOps project has an active environment that was deployed with the v1
-`auto-deploy-image`, use the following steps to upgrade to v2, which uses Helm 3:
+`auto-deploy-image`, use the following steps to upgrade to v2, which uses Helm v3:
 
-1. Modify your `.gitlab-ci.yml` with:
+1. Include the [Helm 2to3 migration CI/CD template](https://gitlab.com/gitlab-org/gitlab/-/raw/master/lib/gitlab/ci/templates/Jobs/Helm-2to3.gitlab-ci.yml):
+
+   - If you are on GitLab.com, or GitLab 14.0.1 or later, this template is already included in Auto DevOps.
+   - On other versions of GitLab, you can modify your `.gitlab-ci.yml` to include the templates:
 
      ```yaml
      include:
        - template: Auto-DevOps.gitlab-ci.yml
-     - remote: https://gitlab.com/hfyngvason/ci-templates/-/raw/master/Helm-2to3.gitlab-ci.yml
-
-   variables:
-     # If this variable is not present, the migration jobs will not show up
-     MIGRATE_HELM_2TO3: "true"
-
-   .auto-deploy:
-     # Optional: If you are on GitLab 13.12 or older, pin the auto-deploy-image
-     # image: registry.gitlab.com/gitlab-org/cluster-integration/auto-deploy-image:v2.6.0
-     variables:
-       AUTO_DEVOPS_FORCE_DEPLOY_V2: 1
-       # If you have non-public pipelines, you can back up the entire namespace in a job artifact
-       # prior to the migration by setting the CI variable BACKUP_NAMESPACE to a non-empty value.
-       # WARNING: If you have public pipelines, this artifact will be public and can
-       #          expose your secrets.
-       # BACKUP_HELM2_RELEASES: 1
+       - remote: https://gitlab.com/gitlab-org/gitlab/-/raw/master/lib/gitlab/ci/templates/Jobs/Helm-2to3.gitlab-ci.yml
      ```
 
-1. Run the `<environment-name>:helm-2to3:migrate` job.
-1. Deploy your environment as usual. This deployment uses Helm 3.
-1. If the deployment succeeds, you can safely run `environment:helm-2to3:cleanup`.
-   This deletes all Helm 2 release data from the namespace.
+1. Set the following CI/CD variables:
 
-   If you set `BACKUP_HELM2_RELEASES` to a non-empty value, the `<environment-name>:helm2to3:migrate`
+   - `MIGRATE_HELM_2TO3` to `true`. If this variable is not present, migration jobs do not run.
+   - `AUTO_DEVOPS_FORCE_DEPLOY_V2` to `1`.
+   - **Optional:** `BACKUP_HELM2_RELEASES` to `1`. If you set this variable, the migration
      job saves a backup for 1 week in a job artifact called `helm-2-release-backups`.
-   If you accidentally delete the Helm 2 releases before you are ready, then
-   this backup is in a Kubernetes manifest file that can be restored using
-   `kubectl apply -f $backup`.
+     If you accidentally delete the Helm v2 releases before you are ready, you can restore
+     this backup from a Kubernetes manifest file by using `kubectl apply -f $backup`.
 
      **WARNING:**
+     *Do not use this if you have public pipelines*.
      This artifact can contain secrets and is visible to any
      user who can see your job.
 
-1. Remove the `MIGRATE_HELM_2TO3` CI/CD variable.
+1. Run a pipeline and trigger the `<environment-name>:helm-2to3:migrate` job.
+1. Deploy your environment as usual. This deployment uses Helm v3.
+1. If the deployment succeeds, you can safely run `<environment-name>:helm-2to3:cleanup`.
+   This deletes all Helm v2 release data from the namespace.
+1. Remove the `MIGRATE_HELM_2TO3` CI/CD variable or set it to `false`. You can do this one environment at a time using [environment scopes](../../ci/environments/index.md#scoping-environments-with-specs).
 
 #### In-Cluster PostgreSQL Channel 2
 

lib/gitlab/ci/templates/Auto-DevOps.gitlab-ci.yml

@@ -166,6 +166,7 @@ include:
   - template: Jobs/Deploy/EC2.gitlab-ci.yml  # https://gitlab.com/gitlab-org/gitlab/blob/master/lib/gitlab/ci/templates/Jobs/Deploy/EC2.gitlab-ci.yml
   - template: Jobs/DAST-Default-Branch-Deploy.gitlab-ci.yml  # https://gitlab.com/gitlab-org/gitlab/blob/master/lib/gitlab/ci/templates/Jobs/DAST-Default-Branch-Deploy.gitlab-ci.yml
   - template: Jobs/Browser-Performance-Testing.gitlab-ci.yml  # https://gitlab.com/gitlab-org/gitlab/blob/master/lib/gitlab/ci/templates/Jobs/Browser-Performance-Testing.gitlab-ci.yml
+  - template: Jobs/Helm-2to3.gitlab-ci.yml  # https://gitlab.com/gitlab-org/gitlab/blob/master/lib/gitlab/ci/templates/Jobs/Helm-2to3.gitlab-ci.yml
   - template: Security/DAST.gitlab-ci.yml  # https://gitlab.com/gitlab-org/gitlab/blob/master/lib/gitlab/ci/templates/Security/DAST.gitlab-ci.yml
   - template: Security/Container-Scanning.gitlab-ci.yml  # https://gitlab.com/gitlab-org/gitlab/blob/master/lib/gitlab/ci/templates/Security/Container-Scanning.gitlab-ci.yml
   - template: Security/Dependency-Scanning.gitlab-ci.yml  # https://gitlab.com/gitlab-org/gitlab/blob/master/lib/gitlab/ci/templates/Security/Dependency-Scanning.gitlab-ci.yml

lib/gitlab/ci/templates/Jobs/Helm-2to3.gitlab-ci.yml

+# This is a pre-release of a Helm 2to3 migration template to facilitate
+# the migration of Auto DevOps releases to Helm 3.
+#
+# To use, set the CI variable MIGRATE_HELM_2TO3 to "true".
+# For more details, go to https://docs.gitlab.com/ee/topics/autodevops/upgrading_auto_deploy_dependencies.html#helm-v3
+
+.helm-2to3-migrate:
+  image: registry.gitlab.com/gitlab-org/cluster-integration/helm-install-image/releases/helm-2to3-2.17.0-3.5.3-kube-1.16.15-alpine-3.12
+  # NOTE: We use the deploy stage because:
+  #   - It exists in all versions of Auto DevOps.
+  #   - It is _empty_.
+  #   - It precedes any Kubernetes deployments.
+  # Users on older versions of GitLab can include this template without adjusting their stages.
+  stage: deploy
+  needs: []
+  artifacts:
+    when: always
+    expire_in: 1 week
+    paths:
+      - helm-2-release-backups/
+  before_script:
+    - mkdir helm-2-release-backups
+    - apk add jq
+    - export TILLER_NAMESPACE=$KUBE_NAMESPACE
+    - export HELM_HOST="localhost:44134"
+    - nohup tiller -listen "${HELM_HOST}" >tiller.log 2>&1 &
+    - helm2 init --client-only
+  script:
+    # check for releases
+    - releases=$(helm2 ls --output json | jq -r '.Releases[].Name')
+    # back up entire namespace if the user opts into it
+    - |
+      if [[ -n "$releases" && -n "$BACKUP_HELM2_RELEASES" ]]; then
+        echo "Backing up releases"
+        kubectl get configmap -n "$KUBE_NAMESPACE" -l "OWNER=TILLER" -o yaml > "helm-2-release-backups/$KUBE_NAMESPACE.yaml"
+      fi
+    # adopt manifests from each release
+    - |
+      for release in $releases; do
+        chart=$(helm2 ls "^$release\$" --output json | jq -r '.Releases[0].Chart')
+        echo "Adopting Helm v2 manifests from $release"
+        # some resource kinds must be listed explicitly https://github.com/kubernetes/kubernetes/issues/42885
+        for name in $(kubectl -n "$KUBE_NAMESPACE" get all,ingress,daemonset -o name -l chart="$chart"); do
+          kubectl annotate --overwrite "$name" meta.helm.sh/release-name="$release"
+          kubectl annotate --overwrite "$name" meta.helm.sh/release-namespace="$KUBE_NAMESPACE"
+          kubectl label --overwrite "$name" app.kubernetes.io/managed-by=Helm
+        done
+      done
+    # migrate each release
+    - |
+      for release in $releases; do
+        echo "Migrating release: $release"
+        helm3 2to3 convert --ignore-already-migrated --release-storage configmaps --tiller-out-cluster --tiller-ns "$TILLER_NAMESPACE" "$release"
+      done
+
+.helm-2to3-cleanup:
+  image: registry.gitlab.com/gitlab-org/cluster-integration/helm-install-image/releases/helm-2to3-2.17.0-3.5.3-kube-1.16.15-alpine-3.12
+  stage: cleanup
+  environment:
+    action: prepare
+  before_script:
+    - export TILLER_NAMESPACE=$KUBE_NAMESPACE
+    - export HELM_HOST="localhost:44134"
+    - nohup tiller -listen "${HELM_HOST}" >tiller.log 2>&1 &
+    - helm2 init --client-only
+  script:
+    - helm3 2to3 cleanup --skip-confirmation --release-storage configmaps --tiller-out-cluster --tiller-ns "$TILLER_NAMESPACE"
+
+.review:
+  environment:
+    name: review/$CI_COMMIT_REF_NAME
+  rules:
+    - if: '$MIGRATE_HELM_2TO3 != "true"'
+      when: never
+    - if: '$CI_KUBERNETES_ACTIVE == null || $CI_KUBERNETES_ACTIVE == ""'
+      when: never
+    - if: '$CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH'
+      when: never
+    - if: '$REVIEW_DISABLED'
+      when: never
+    - if: '$CI_COMMIT_TAG || $CI_COMMIT_BRANCH'
+      when: manual
+
+review:helm-2to3:migrate:
+  extends: [.review, .helm-2to3-migrate]
+
+review:helm-2to3:cleanup:
+  extends: [.review, .helm-2to3-cleanup]
+  rules:
+    - if: '$MIGRATE_HELM_2TO3 != "true" && $CLEANUP_HELM_2TO3 == null'
+      when: never
+    - if: '$CI_KUBERNETES_ACTIVE == null || $CI_KUBERNETES_ACTIVE == ""'
+      when: never
+    - if: '$CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH'
+      when: never
+    - if: '$REVIEW_DISABLED'
+      when: never
+    - if: '$CI_COMMIT_TAG || $CI_COMMIT_BRANCH'
+      when: manual
+
+.staging:
+  environment:
+    name: staging
+  rules:
+    - if: '$MIGRATE_HELM_2TO3 != "true"'
+      when: never
+    - if: '$CI_KUBERNETES_ACTIVE == null || $CI_KUBERNETES_ACTIVE == ""'
+      when: never
+    - if: '$CI_COMMIT_BRANCH != $CI_DEFAULT_BRANCH'
+      when: never
+    - if: '$STAGING_ENABLED'
+      when: manual
+
+staging:helm-2to3:migrate:
+  extends: [.staging, .helm-2to3-migrate]
+
+staging:helm-2to3:cleanup:
+  extends: [.staging, .helm-2to3-cleanup]
+  rules:
+    - if: '$MIGRATE_HELM_2TO3 != "true" && $CLEANUP_HELM_2TO3 == null'
+      when: never
+    - if: '$CI_KUBERNETES_ACTIVE == null || $CI_KUBERNETES_ACTIVE == ""'
+      when: never
+    - if: '$CI_COMMIT_BRANCH != $CI_DEFAULT_BRANCH'
+      when: never
+    - if: '$STAGING_ENABLED'
+      when: manual
+
+.production:
+  environment:
+    name: production
+  rules:
+    - if: '$MIGRATE_HELM_2TO3 != "true"'
+      when: never
+    - if: '$CI_KUBERNETES_ACTIVE == null || $CI_KUBERNETES_ACTIVE == ""'
+      when: never
+    - if: '$CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH'
+      when: manual
+
+production:helm-2to3:migrate:
+  extends: [.production, .helm-2to3-migrate]
+
+production:helm-2to3:cleanup:
+  extends: [.production, .helm-2to3-cleanup]
+  rules:
+    - if: '$MIGRATE_HELM_2TO3 != "true" && $CLEANUP_HELM_2TO3 == null'
+      when: never
+    - if: '$CI_KUBERNETES_ACTIVE == null || $CI_KUBERNETES_ACTIVE == ""'
+      when: never
+    - if: '$CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH'
+      when: manual

spec/lib/gitlab/ci/templates/auto_devops_gitlab_ci_yaml_spec.rb

@@ -34,6 +34,7 @@ RSpec.describe 'Auto-DevOps.gitlab-ci.yml' do
           expect(build_names).not_to include('canary')
           expect(build_names).not_to include('review')
           expect(build_names).not_to include(a_string_matching(/rollout \d+%/))
+          expect(build_names).not_to include(a_string_matching(/helm-2to3\d+%/))
         end
       end
 
@@ -190,6 +191,17 @@ RSpec.describe 'Auto-DevOps.gitlab-ci.yml' do
                 expect(build_names).not_to include(a_string_matching(/rollout \d+%/))
               end
             end
+
+            context 'when MIGRATE_HELM_2TO3=true' do
+              before do
+                create(:ci_variable, project: project, key: 'MIGRATE_HELM_2TO3', value: 'true')
+              end
+
+              it 'includes a helm-2to3:migrate and a helm-2to3:cleanup job' do
+                expect(build_names).to include('production:helm-2to3:migrate')
+                expect(build_names).to include('production:helm-2to3:cleanup')
+              end
+            end
           end
 
           context 'outside of default branch' do
@@ -207,12 +219,23 @@ RSpec.describe 'Auto-DevOps.gitlab-ci.yml' do
               expect(build_names).to include('review')
               expect(build_names).not_to include(a_string_matching(/rollout \d+%/))
             end
+
+            context 'when MIGRATE_HELM_2TO3=true' do
+              before do
+                create(:ci_variable, project: project, key: 'MIGRATE_HELM_2TO3', value: 'true')
+              end
+
+              it 'includes a helm-2to3:migrate and a helm-2to3:cleanup job' do
+                expect(build_names).to include('review:helm-2to3:migrate')
+                expect(build_names).to include('review:helm-2to3:cleanup')
+              end
+            end
           end
         end
       end
     end
 
-    describe 'build-pack detection' do
+    describe 'buildpack detection' do
       using RSpec::Parameterized::TableSyntax
 
       where(:case_name, :files, :variables, :include_build_names, :not_include_build_names) do