[CE] Port review apps file to CEce-improve-review-apps

Signed-off-by: Rémy Coutable <remy@rymai.me>

6 files changed, 459 insertions, 0 deletions

diff --git a/lib/quality/helm_client.rb b/lib/quality/helm_client.rb
new file mode 100644
index 00000000000..49d953da681
--- /dev/null
+++ b/lib/quality/helm_client.rb
@@ -0,0 +1,47 @@
+# frozen_string_literal: true
+
+require 'time'
+require_relative '../gitlab/popen' unless defined?(Gitlab::Popen)
+
+module Quality
+  class HelmClient
+    attr_reader :namespace
+
+    Release = Struct.new(:name, :revision, :last_update, :status, :chart, :namespace) do
+      def revision
+        @revision ||= self[:revision].to_i
+      end
+
+      def last_update
+        @last_update ||= Time.parse(self[:last_update])
+      end
+    end
+
+    def initialize(namespace: ENV['KUBE_NAMESPACE'])
+      @namespace = namespace
+    end
+
+    def releases(args: [])
+      command = ['list', %(--namespace "#{namespace}"), *args]
+
+      run_command(command)
+        .stdout
+        .lines
+        .select { |line| line.include?(namespace) }
+        .map { |line| Release.new(*line.split(/\t/).map(&:strip)) }
+    end
+
+    def delete(release_name:)
+      run_command(['delete', '--purge', release_name])
+    end
+
+    private
+
+    def run_command(command)
+      final_command = ['helm', *command].join(' ')
+      puts "Running command: `#{final_command}`" # rubocop:disable Rails/Output
+
+      Gitlab::Popen.popen_with_detail([final_command])
+    end
+  end
+end
diff --git a/lib/quality/kubernetes_client.rb b/lib/quality/kubernetes_client.rb
new file mode 100644
index 00000000000..e366a688e3e
--- /dev/null
+++ b/lib/quality/kubernetes_client.rb
@@ -0,0 +1,32 @@
+# frozen_string_literal: true
+
+require_relative '../gitlab/popen' unless defined?(Gitlab::Popen)
+
+module Quality
+  class KubernetesClient
+    attr_reader :namespace
+
+    def initialize(namespace: ENV['KUBE_NAMESPACE'])
+      @namespace = namespace
+    end
+
+    def cleanup(release_name:)
+      command = ['kubectl']
+      command << %(-n "#{namespace}" get ingress,svc,pdb,hpa,deploy,statefulset,job,pod,secret,configmap,pvc,secret,clusterrole,clusterrolebinding,role,rolebinding,sa 2>&1)
+      command << '|' << %(grep "#{release_name}")
+      command << '|' << "awk '{print $1}'"
+      command << '|' << %(xargs kubectl -n "#{namespace}" delete)
+      command << '||' << 'true'
+
+      run_command(command)
+    end
+
+    private
+
+    def run_command(command)
+      puts "Running command: `#{command.join(' ')}`" # rubocop:disable Rails/Output
+
+      Gitlab::Popen.popen_with_detail(command)
+    end
+  end
+end
diff --git a/scripts/review_apps/automated_cleanup.rb b/scripts/review_apps/automated_cleanup.rb
new file mode 100755
index 00000000000..ea53f89c844
--- /dev/null
+++ b/scripts/review_apps/automated_cleanup.rb
@@ -0,0 +1,109 @@
+# frozen_string_literal: true
+
+require 'gitlab'
+require_relative File.expand_path('../../lib/quality/helm_client.rb', __dir__)
+require_relative File.expand_path('../../lib/quality/kubernetes_client.rb', __dir__)
+
+class AutomatedCleanup
+  attr_reader :project_path, :gitlab_token, :cleaned_up_releases
+
+  def initialize(project_path: ENV['CI_PROJECT_PATH'], gitlab_token: ENV['GITLAB_BOT_REVIEW_APPS_CLEANUP_TOKEN'])
+    @project_path = project_path
+    @gitlab_token = gitlab_token
+    @cleaned_up_releases = []
+  end
+
+  def gitlab
+    @gitlab ||= begin
+      Gitlab.configure do |config|
+        config.endpoint = 'https://gitlab.com/api/v4'
+        # gitlab-bot's token "GitLab review apps cleanup"
+        config.private_token = gitlab_token
+      end
+
+      Gitlab
+    end
+  end
+
+  def helm
+    @helm ||= Quality::HelmClient.new
+  end
+
+  def kubernetes
+    @kubernetes ||= Quality::KubernetesClient.new
+  end
+
+  def perform_gitlab_environment_cleanup!(days_for_stop:, days_for_delete:)
+    puts "Checking for review apps not updated in the last #{days_for_stop} days..."
+
+    checked_environments = []
+    delete_threshold = threshold_time(days: days_for_delete)
+    stop_threshold = threshold_time(days: days_for_stop)
+    gitlab.deployments(project_path, per_page: 50).auto_paginate do |deployment|
+      next unless deployment.environment.name.start_with?('review/')
+      next if checked_environments.include?(deployment.environment.slug)
+
+      puts
+
+      checked_environments << deployment.environment.slug
+      deployed_at = Time.parse(deployment.created_at)
+
+      if deployed_at < delete_threshold
+        print_release_state(subject: 'Review app', release_name: deployment.environment.slug, release_date: deployment.created_at, action: 'deleting')
+        gitlab.delete_environment(project_path, deployment.environment.id)
+        cleaned_up_releases << deployment.environment.slug
+      elsif deployed_at < stop_threshold
+        print_release_state(subject: 'Review app', release_name: deployment.environment.slug, release_date: deployment.created_at, action: 'stopping')
+        gitlab.stop_environment(project_path, deployment.environment.id)
+        cleaned_up_releases << deployment.environment.slug
+      else
+        print_release_state(subject: 'Review app', release_name: deployment.environment.slug, release_date: deployment.created_at, action: 'leaving')
+      end
+    end
+  end
+
+  def perform_helm_releases_cleanup!(days:)
+    puts "Checking for Helm releases not updated in the last #{days} days..."
+
+    threshold_day = threshold_time(days: days)
+    helm.releases(args: ['--deployed', '--failed', '--date', '--reverse', '--max 25']).each do |release|
+      next if cleaned_up_releases.include?(release.name)
+
+      if release.last_update < threshold_day
+        print_release_state(subject: 'Release', release_name: release.name, release_date: release.last_update, action: 'cleaning')
+        helm.delete(release_name: release.name)
+        kubernetes.cleanup(release_name: release.name)
+      else
+        print_release_state(subject: 'Release', release_name: release.name, release_date: release.last_update, action: 'leaving')
+      end
+    end
+  end
+
+  def threshold_time(days:)
+    Time.now - days * 24 * 3600
+  end
+
+  def print_release_state(subject:, release_name:, release_date:, action:)
+    puts "\n#{subject} '#{release_name}' was last deployed on #{release_date}: #{action} it."
+  end
+end
+
+def timed(task)
+  start = Time.now
+  yield(self)
+  puts "#{task} finished in #{Time.now - start} seconds.\n"
+end
+
+automated_cleanup = AutomatedCleanup.new
+
+timed('Review apps cleanup') do
+  automated_cleanup.perform_gitlab_environment_cleanup!(days_for_stop: 5, days_for_delete: 6)
+end
+
+puts
+
+timed('Helm releases cleanup') do
+  automated_cleanup.perform_helm_releases_cleanup!(days: 7)
+end
+
+exit(0)
diff --git a/scripts/review_apps/review-apps.sh b/scripts/review_apps/review-apps.sh
new file mode 100755
index 00000000000..78293464265
--- /dev/null
+++ b/scripts/review_apps/review-apps.sh
@@ -0,0 +1,184 @@
+[[ "$TRACE" ]] && set -x
+export TILLER_NAMESPACE="$KUBE_NAMESPACE"
+
+function check_kube_domain() {
+  if [ -z ${REVIEW_APPS_DOMAIN+x} ]; then
+    echo "In order to deploy or use Review Apps, REVIEW_APPS_DOMAIN variable must be set"
+    echo "You can do it in Auto DevOps project settings or defining a variable at group or project level"
+    echo "You can also manually add it in .gitlab-ci.yml"
+    false
+  else
+    true
+  fi
+}
+
+function download_gitlab_chart() {
+  curl -o gitlab.tar.bz2 https://gitlab.com/charts/gitlab/-/archive/$GITLAB_HELM_CHART_REF/gitlab-$GITLAB_HELM_CHART_REF.tar.bz2
+  tar -xjf gitlab.tar.bz2
+  cd gitlab-$GITLAB_HELM_CHART_REF
+
+  helm init --client-only
+  helm repo add gitlab https://charts.gitlab.io
+  helm dependency update
+  helm dependency build
+}
+
+function ensure_namespace() {
+  kubectl describe namespace "$KUBE_NAMESPACE" || kubectl create namespace "$KUBE_NAMESPACE"
+}
+
+function install_tiller() {
+  echo "Checking Tiller..."
+  helm init --upgrade
+  kubectl rollout status -n "$TILLER_NAMESPACE" -w "deployment/tiller-deploy"
+  if ! helm version --debug; then
+    echo "Failed to init Tiller."
+    return 1
+  fi
+  echo ""
+}
+
+function create_secret() {
+  echo "Create secret..."
+
+  kubectl create secret generic -n "$KUBE_NAMESPACE" \
+    $CI_ENVIRONMENT_SLUG-gitlab-initial-root-password \
+    --from-literal=password=$REVIEW_APPS_ROOT_PASSWORD \
+    --dry-run -o json | kubectl apply -f -
+}
+
+function previousDeployFailed() {
+  set +e
+  echo "Checking for previous deployment of $CI_ENVIRONMENT_SLUG"
+  deployment_status=$(helm status $CI_ENVIRONMENT_SLUG >/dev/null 2>&1)
+  status=$?
+  # if `status` is `0`, deployment exists, has a status
+  if [ $status -eq 0 ]; then
+    echo "Previous deployment found, checking status"
+    deployment_status=$(helm status $CI_ENVIRONMENT_SLUG | grep ^STATUS | cut -d' ' -f2)
+    echo "Previous deployment state: $deployment_status"
+    if [[ "$deployment_status" == "FAILED" || "$deployment_status" == "PENDING_UPGRADE" || "$deployment_status" == "PENDING_INSTALL" ]]; then
+      status=0;
+    else
+      status=1;
+    fi
+  else
+    echo "Previous deployment NOT found."
+  fi
+  set -e
+  return $status
+}
+
+function deploy() {
+  track="${1-stable}"
+  name="$CI_ENVIRONMENT_SLUG"
+
+  if [[ "$track" != "stable" ]]; then
+    name="$name-$track"
+  fi
+
+  replicas="1"
+  service_enabled="false"
+  postgres_enabled="$POSTGRES_ENABLED"
+  gitlab_migrations_image_repository="registry.gitlab.com/gitlab-org/build/cng-mirror/gitlab-rails-ce"
+  gitlab_sidekiq_image_repository="registry.gitlab.com/gitlab-org/build/cng-mirror/gitlab-sidekiq-ce"
+  gitlab_unicorn_image_repository="registry.gitlab.com/gitlab-org/build/cng-mirror/gitlab-unicorn-ce"
+  gitlab_gitaly_image_repository="registry.gitlab.com/gitlab-org/build/cng-mirror/gitaly"
+  gitlab_shell_image_repository="registry.gitlab.com/gitlab-org/build/cng-mirror/gitlab-shell"
+  gitlab_workhorse_image_repository="registry.gitlab.com/gitlab-org/build/cng-mirror/gitlab-workhorse-ce"
+
+  if [[ "$CI_PROJECT_NAME" == "gitlab-ee" ]]; then
+    gitlab_migrations_image_repository="registry.gitlab.com/gitlab-org/build/cng-mirror/gitlab-rails-ee"
+    gitlab_sidekiq_image_repository="registry.gitlab.com/gitlab-org/build/cng-mirror/gitlab-sidekiq-ee"
+    gitlab_unicorn_image_repository="registry.gitlab.com/gitlab-org/build/cng-mirror/gitlab-unicorn-ee"
+    gitlab_workhorse_image_repository="registry.gitlab.com/gitlab-org/build/cng-mirror/gitlab-workhorse-ee"
+  fi
+
+  # canary uses stable db
+  [[ "$track" == "canary" ]] && postgres_enabled="false"
+
+  env_track=$( echo $track | tr -s  '[:lower:]'  '[:upper:]' )
+  env_slug=$( echo ${CI_ENVIRONMENT_SLUG//-/_} | tr -s  '[:lower:]'  '[:upper:]' )
+
+  if [[ "$track" == "stable" ]]; then
+    # for stable track get number of replicas from `PRODUCTION_REPLICAS`
+    eval new_replicas=\$${env_slug}_REPLICAS
+    service_enabled="true"
+  else
+    # for all tracks get number of replicas from `CANARY_PRODUCTION_REPLICAS`
+    eval new_replicas=\$${env_track}_${env_slug}_REPLICAS
+  fi
+  if [[ -n "$new_replicas" ]]; then
+    replicas="$new_replicas"
+  fi
+
+  # Cleanup and previous installs, as FAILED and PENDING_UPGRADE will cause errors with `upgrade`
+  if [ "$CI_ENVIRONMENT_SLUG" != "production" ] && previousDeployFailed ; then
+    echo "Deployment in bad state, cleaning up $CI_ENVIRONMENT_SLUG"
+    delete
+    cleanup
+  fi
+  helm repo add gitlab https://charts.gitlab.io/
+  helm dep update .
+
+HELM_CMD=$(cat << EOF
+  helm upgrade --install \
+    --wait \
+    --timeout 600 \
+    --set releaseOverride="$CI_ENVIRONMENT_SLUG" \
+    --set global.hosts.hostSuffix="$HOST_SUFFIX" \
+    --set global.hosts.domain="$REVIEW_APPS_DOMAIN" \
+    --set certmanager.install=false \
+    --set global.ingress.configureCertmanager=false \
+    --set global.ingress.tls.secretName=tls-cert \
+    --set global.ingress.annotations."external-dns\.alpha\.kubernetes\.io/ttl"="10"
+    --set gitlab.unicorn.resources.requests.cpu=200m \
+    --set gitlab.sidekiq.resources.requests.cpu=100m \
+    --set gitlab.gitlab-shell.resources.requests.cpu=100m \
+    --set redis.resources.requests.cpu=100m \
+    --set minio.resources.requests.cpu=100m \
+    --set gitlab.migrations.image.repository="$gitlab_migrations_image_repository" \
+    --set gitlab.migrations.image.tag="$CI_COMMIT_REF_NAME" \
+    --set gitlab.sidekiq.image.repository="$gitlab_sidekiq_image_repository" \
+    --set gitlab.sidekiq.image.tag="$CI_COMMIT_REF_NAME" \
+    --set gitlab.unicorn.image.repository="$gitlab_unicorn_image_repository" \
+    --set gitlab.unicorn.image.tag="$CI_COMMIT_REF_NAME" \
+    --set gitlab.gitaly.image.repository="registry.gitlab.com/gitlab-org/build/cng-mirror/gitaly" \
+    --set gitlab.gitaly.image.tag="v$GITALY_VERSION" \
+    --set gitlab.gitlab-shell.image.repository="registry.gitlab.com/gitlab-org/build/cng-mirror/gitlab-shell" \
+    --set gitlab.gitlab-shell.image.tag="v$GITLAB_SHELL_VERSION" \
+    --set gitlab.unicorn.workhorse.image="$gitlab_workhorse_image_repository" \
+    --set gitlab.unicorn.workhorse.tag="$CI_COMMIT_REF_NAME" \
+    --namespace="$KUBE_NAMESPACE" \
+    --version="$CI_PIPELINE_ID-$CI_JOB_ID" \
+    "$name" \
+    .
+EOF
+)
+
+  echo "Deploying with:"
+  echo $HELM_CMD
+
+  eval $HELM_CMD
+}
+
+function delete() {
+  track="${1-stable}"
+  name="$CI_ENVIRONMENT_SLUG"
+
+  if [[ "$track" != "stable" ]]; then
+    name="$name-$track"
+  fi
+
+  echo "Deleting release '$name'..."
+  helm delete --purge "$name" || true
+}
+
+function cleanup() {
+  echo "Cleaning up $CI_ENVIRONMENT_SLUG..."
+  kubectl -n "$KUBE_NAMESPACE" get ingress,svc,pdb,hpa,deploy,statefulset,job,pod,secret,configmap,pvc,secret,clusterrole,clusterrolebinding,role,rolebinding,sa 2>&1 \
+    | grep "$CI_ENVIRONMENT_SLUG" \
+    | awk '{print $1}' \
+    | xargs kubectl -n "$KUBE_NAMESPACE" delete \
+    || true
+}
diff --git a/spec/lib/quality/helm_client_spec.rb b/spec/lib/quality/helm_client_spec.rb
new file mode 100644
index 00000000000..553cd8719de
--- /dev/null
+++ b/spec/lib/quality/helm_client_spec.rb
@@ -0,0 +1,62 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Quality::HelmClient do
+  let(:namespace) { 'review-apps-ee' }
+  let(:release_name) { 'my-release' }
+  let(:raw_helm_list_result) do
+    <<~OUTPUT
+    NAME                    	REVISION	UPDATED                 	STATUS	CHART       	NAMESPACE
+    review-improve-re-2dsd9d	1       	Tue Jul 31 15:53:17 2018	FAILED	gitlab-0.3.4	#{namespace}
+    review-11-1-stabl-3r2fso	1       	Mon Jul 30 22:44:14 2018	FAILED	gitlab-0.3.3	#{namespace}
+    review-49375-css-fk664j 	1       	Thu Jul 19 11:01:30 2018	FAILED	gitlab-0.2.4	#{namespace}
+    OUTPUT
+  end
+
+  subject { described_class.new(namespace: namespace) }
+
+  describe '#releases' do
+    it 'calls helm list with default arguments' do
+      expect(Gitlab::Popen).to receive(:popen_with_detail)
+        .with([%(helm list --namespace "#{namespace}")])
+        .and_return(Gitlab::Popen::Result.new([], ''))
+
+      subject.releases
+    end
+
+    it 'calls helm list with given arguments' do
+      expect(Gitlab::Popen).to receive(:popen_with_detail)
+        .with([%(helm list --namespace "#{namespace}" --deployed)])
+        .and_return(Gitlab::Popen::Result.new([], ''))
+
+      subject.releases(args: ['--deployed'])
+    end
+
+    it 'returns a list of Release objects' do
+      expect(Gitlab::Popen).to receive(:popen_with_detail)
+        .with([%(helm list --namespace "#{namespace}" --deployed)])
+        .and_return(Gitlab::Popen::Result.new([], raw_helm_list_result))
+
+      releases = subject.releases(args: ['--deployed'])
+
+      expect(releases.size).to eq(3)
+      expect(releases[0].name).to eq('review-improve-re-2dsd9d')
+      expect(releases[0].revision).to eq(1)
+      expect(releases[0].last_update).to eq(Time.parse('Tue Jul 31 15:53:17 2018'))
+      expect(releases[0].status).to eq('FAILED')
+      expect(releases[0].chart).to eq('gitlab-0.3.4')
+      expect(releases[0].namespace).to eq(namespace)
+    end
+  end
+
+  describe '#delete' do
+    it 'calls helm delete with default arguments' do
+      expect(Gitlab::Popen).to receive(:popen_with_detail)
+        .with(["helm delete --purge #{release_name}"])
+        .and_return(Gitlab::Popen::Result.new([], '', '', 0))
+
+      expect(subject.delete(release_name: release_name).status).to eq(0)
+    end
+  end
+end
diff --git a/spec/lib/quality/kubernetes_client_spec.rb b/spec/lib/quality/kubernetes_client_spec.rb
new file mode 100644
index 00000000000..3c0c0d0977a
--- /dev/null
+++ b/spec/lib/quality/kubernetes_client_spec.rb
@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Quality::KubernetesClient do
+  subject { described_class.new(namespace: 'review-apps-ee') }
+
+  describe '#cleanup' do
+    it 'calls kubectl with the correct arguments' do
+      # popen_with_detail will receive an array with a bunch of arguments; we're
+      # only concerned with it having the correct namespace and release name
+      expect(Gitlab::Popen).to receive(:popen_with_detail) do |args|
+        expect(args)
+          .to satisfy_one { |arg| arg.start_with?('-n "review-apps-ee" get') }
+        expect(args)
+          .to satisfy_one { |arg| arg == 'grep "my-release"' }
+        expect(args)
+          .to satisfy_one { |arg| arg.end_with?('-n "review-apps-ee" delete') }
+      end
+
+      # We're not verifying the output here, just silencing it
+      expect { subject.cleanup(release_name: 'my-release') }.to output.to_stdout
+    end
+  end
+end