From b297cdcbdfa290e04acffe4a8ac272309b00b5f4 Mon Sep 17 00:00:00 2001
From: Thong Kuah <tkuah@gitlab.com>
Date: Fri, 5 Jul 2019 23:54:15 +1200
Subject: [PATCH] Extract deploy functions in a base image

https://gitlab.com/gitlab-org/cluster-integration/auto-deploy-image
---
 .../extract_auto_deploy_into_base_image.yml   |   5 +
 .../ci/templates/Auto-DevOps.gitlab-ci.yml    |   3 -
 .../ci/templates/Jobs/Deploy.gitlab-ci.yml    | 421 ++----------------
 3 files changed, 53 insertions(+), 376 deletions(-)
 create mode 100644 changelogs/unreleased/extract_auto_deploy_into_base_image.yml

diff --git a/changelogs/unreleased/extract_auto_deploy_into_base_image.yml b/changelogs/unreleased/extract_auto_deploy_into_base_image.yml
new file mode 100644
index 00000000000..ff0d1f3bd71
--- /dev/null
+++ b/changelogs/unreleased/extract_auto_deploy_into_base_image.yml
@@ -0,0 +1,5 @@
+---
+title: Extract Auto DevOps deploy functions into a base image
+merge_request: 30404
+author:
+type: changed
diff --git a/lib/gitlab/ci/templates/Auto-DevOps.gitlab-ci.yml b/lib/gitlab/ci/templates/Auto-DevOps.gitlab-ci.yml
index 7b9a169a91f..5c1c0c142e5 100644
--- a/lib/gitlab/ci/templates/Auto-DevOps.gitlab-ci.yml
+++ b/lib/gitlab/ci/templates/Auto-DevOps.gitlab-ci.yml
@@ -50,9 +50,6 @@ variables:
   POSTGRES_DB: $CI_ENVIRONMENT_SLUG
   POSTGRES_VERSION: 9.6.2
 
-  KUBERNETES_VERSION: 1.11.10
-  HELM_VERSION: 2.14.0
-
   DOCKER_DRIVER: overlay2
 
   ROLLOUT_RESOURCE_TYPE: deployment
diff --git a/lib/gitlab/ci/templates/Jobs/Deploy.gitlab-ci.yml b/lib/gitlab/ci/templates/Jobs/Deploy.gitlab-ci.yml
index 6ead127e7b6..a8ec2d4781d 100644
--- a/lib/gitlab/ci/templates/Jobs/Deploy.gitlab-ci.yml
+++ b/lib/gitlab/ci/templates/Jobs/Deploy.gitlab-ci.yml
@@ -1,14 +1,17 @@
+.auto-deploy:
+  image: "registry.gitlab.com/gitlab-org/cluster-integration/auto-deploy-image:v0.1.0"
+
 review:
+  extends: .auto-deploy
   stage: review
   script:
-    - check_kube_domain
-    - install_dependencies
-    - download_chart
-    - ensure_namespace
-    - initialize_tiller
-    - create_secret
-    - deploy
-    - persist_environment_url
+    - auto-deploy check_kube_domain
+    - auto-deploy download_chart
+    - auto-deploy ensure_namespace
+    - auto-deploy initialize_tiller
+    - auto-deploy create_secret
+    - auto-deploy deploy
+    - auto-deploy persist_environment_url
   environment:
     name: review/$CI_COMMIT_REF_NAME
     url: http://$CI_PROJECT_ID-$CI_ENVIRONMENT_SLUG.$KUBE_INGRESS_BASE_DOMAIN
@@ -27,13 +30,13 @@ review:
       - $REVIEW_DISABLED
 
 stop_review:
+  extends: .auto-deploy
   stage: cleanup
   variables:
     GIT_STRATEGY: none
   script:
-    - install_dependencies
-    - initialize_tiller
-    - delete
+    - auto-deploy initialize_tiller
+    - auto-deploy delete
   environment:
     name: review/$CI_COMMIT_REF_NAME
     action: stop
@@ -57,15 +60,15 @@ stop_review:
 # STAGING_ENABLED.
 
 staging:
+  extends: .auto-deploy
   stage: staging
   script:
-    - check_kube_domain
-    - install_dependencies
-    - download_chart
-    - ensure_namespace
-    - initialize_tiller
-    - create_secret
-    - deploy
+    - auto-deploy check_kube_domain
+    - auto-deploy download_chart
+    - auto-deploy ensure_namespace
+    - auto-deploy initialize_tiller
+    - auto-deploy create_secret
+    - auto-deploy deploy
   environment:
     name: staging
     url: http://$CI_PROJECT_PATH_SLUG-staging.$KUBE_INGRESS_BASE_DOMAIN
@@ -81,15 +84,15 @@ staging:
 # CANARY_ENABLED.
 
 canary:
+  extends: .auto-deploy
   stage: canary
   script:
-    - check_kube_domain
-    - install_dependencies
-    - download_chart
-    - ensure_namespace
-    - initialize_tiller
-    - create_secret
-    - deploy canary
+    - auto-deploy check_kube_domain
+    - auto-deploy download_chart
+    - auto-deploy ensure_namespace
+    - auto-deploy initialize_tiller
+    - auto-deploy create_secret
+    - auto-deploy deploy canary
   environment:
     name: production
     url: http://$CI_PROJECT_PATH_SLUG.$KUBE_INGRESS_BASE_DOMAIN
@@ -102,18 +105,18 @@ canary:
       - $CANARY_ENABLED
 
 .production: &production_template
+  extends: .auto-deploy
   stage: production
   script:
-    - check_kube_domain
-    - install_dependencies
-    - download_chart
-    - ensure_namespace
-    - initialize_tiller
-    - create_secret
-    - deploy
-    - delete canary
-    - delete rollout
-    - persist_environment_url
+    - auto-deploy check_kube_domain
+    - auto-deploy download_chart
+    - auto-deploy ensure_namespace
+    - auto-deploy initialize_tiller
+    - auto-deploy create_secret
+    - auto-deploy deploy
+    - auto-deploy delete canary
+    - auto-deploy delete rollout
+    - auto-deploy persist_environment_url
   environment:
     name: production
     url: http://$CI_PROJECT_PATH_SLUG.$KUBE_INGRESS_BASE_DOMAIN
@@ -152,17 +155,17 @@ production_manual:
 # This job implements incremental rollout on for every push to `master`.
 
 .rollout: &rollout_template
+  extends: .auto-deploy
   script:
-    - check_kube_domain
-    - install_dependencies
-    - download_chart
-    - ensure_namespace
-    - initialize_tiller
-    - create_secret
-    - deploy rollout $ROLLOUT_PERCENTAGE
-    - scale stable $((100-ROLLOUT_PERCENTAGE))
-    - delete canary
-    - persist_environment_url
+    - auto-deploy check_kube_domain
+    - auto-deploy download_chart
+    - auto-deploy ensure_namespace
+    - auto-deploy initialize_tiller
+    - auto-deploy create_secret
+    - auto-deploy deploy rollout $ROLLOUT_PERCENTAGE
+    - auto-deploy scale stable $((100-ROLLOUT_PERCENTAGE))
+    - auto-deploy delete canary
+    - auto-deploy persist_environment_url
   environment:
     name: production
     url: http://$CI_PROJECT_PATH_SLUG.$KUBE_INGRESS_BASE_DOMAIN
@@ -240,331 +243,3 @@ rollout 100%:
   <<: *manual_rollout_template
   <<: *production_template
   allow_failure: false
-
-.deploy_helpers: &deploy_helpers |
-  [[ "$TRACE" ]] && set -x
-  export RELEASE_NAME=${HELM_RELEASE_NAME:-$CI_ENVIRONMENT_SLUG}
-  auto_database_url=postgres://${POSTGRES_USER}:${POSTGRES_PASSWORD}@${RELEASE_NAME}-postgres:5432/${POSTGRES_DB}
-  export DATABASE_URL=${DATABASE_URL-$auto_database_url}
-  export TILLER_NAMESPACE=$KUBE_NAMESPACE
-
-  function get_replicas() {
-    track="${1:-stable}"
-    percentage="${2:-100}"
-
-    env_track=$( echo $track | tr -s  '[:lower:]'  '[:upper:]' )
-    env_slug=$( echo ${CI_ENVIRONMENT_SLUG//-/_} | tr -s  '[:lower:]'  '[:upper:]' )
-
-    if [[ "$track" == "stable" ]] || [[ "$track" == "rollout" ]]; then
-      # for stable track get number of replicas from `PRODUCTION_REPLICAS`
-      eval new_replicas=\$${env_slug}_REPLICAS
-      if [[ -z "$new_replicas" ]]; then
-        new_replicas=$REPLICAS
-      fi
-    else
-      # for all tracks get number of replicas from `CANARY_PRODUCTION_REPLICAS`
-      eval new_replicas=\$${env_track}_${env_slug}_REPLICAS
-      if [[ -z "$new_replicas" ]]; then
-        eval new_replicas=\${env_track}_REPLICAS
-      fi
-    fi
-
-    replicas="${new_replicas:-1}"
-    replicas="$(($replicas * $percentage / 100))"
-
-    # always return at least one replicas
-    if [[ $replicas -gt 0 ]]; then
-      echo "$replicas"
-    else
-      echo 1
-    fi
-  }
-
-  # Extracts variables prefixed with K8S_SECRET_
-  # and creates a Kubernetes secret.
-  #
-  # e.g. If we have the following environment variables:
-  #   K8S_SECRET_A=value1
-  #   K8S_SECRET_B=multi\ word\ value
-  #
-  # Then we will create a secret with the following key-value pairs:
-  #   data:
-  #     A: dmFsdWUxCg==
-  #     B: bXVsdGkgd29yZCB2YWx1ZQo=
-  function create_application_secret() {
-    track="${1-stable}"
-    export APPLICATION_SECRET_NAME=$(application_secret_name "$track")
-
-    env | sed -n "s/^K8S_SECRET_\(.*\)$/\1/p" > k8s_prefixed_variables
-
-    kubectl create secret \
-      -n "$KUBE_NAMESPACE" generic "$APPLICATION_SECRET_NAME" \
-      --from-env-file k8s_prefixed_variables -o yaml --dry-run |
-      kubectl replace -n "$KUBE_NAMESPACE" --force -f -
-
-    export APPLICATION_SECRET_CHECKSUM=$(cat k8s_prefixed_variables | sha256sum | cut -d ' ' -f 1)
-
-    rm k8s_prefixed_variables
-  }
-
-  function deploy_name() {
-    name="$RELEASE_NAME"
-    track="${1-stable}"
-
-    if [[ "$track" != "stable" ]]; then
-      name="$name-$track"
-    fi
-
-    echo $name
-  }
-
-  function application_secret_name() {
-    track="${1-stable}"
-    name=$(deploy_name "$track")
-
-    echo "${name}-secret"
-  }
-
-  function deploy() {
-    track="${1-stable}"
-    percentage="${2:-100}"
-    name=$(deploy_name "$track")
-
-    if [[ -z "$CI_COMMIT_TAG" ]]; then
-      image_repository=${CI_APPLICATION_REPOSITORY:-$CI_REGISTRY_IMAGE/$CI_COMMIT_REF_SLUG}
-      image_tag=${CI_APPLICATION_TAG:-$CI_COMMIT_SHA}
-    else
-      image_repository=${CI_APPLICATION_REPOSITORY:-$CI_REGISTRY_IMAGE}
-      image_tag=${CI_APPLICATION_TAG:-$CI_COMMIT_TAG}
-    fi
-
-    service_enabled="true"
-    postgres_enabled="$POSTGRES_ENABLED"
-
-    # if track is different than stable,
-    # re-use all attached resources
-    if [[ "$track" != "stable" ]]; then
-      service_enabled="false"
-      postgres_enabled="false"
-    fi
-
-    replicas=$(get_replicas "$track" "$percentage")
-
-    if [[ "$CI_PROJECT_VISIBILITY" != "public" ]]; then
-      secret_name='gitlab-registry'
-    else
-      secret_name=''
-    fi
-
-    create_application_secret "$track"
-
-    env_slug=$(echo ${CI_ENVIRONMENT_SLUG//-/_} | tr -s '[:lower:]' '[:upper:]')
-    eval env_ADDITIONAL_HOSTS=\$${env_slug}_ADDITIONAL_HOSTS
-    if [ -n "$env_ADDITIONAL_HOSTS" ]; then
-      additional_hosts="{$env_ADDITIONAL_HOSTS}"
-    elif [ -n "$ADDITIONAL_HOSTS" ]; then
-      additional_hosts="{$ADDITIONAL_HOSTS}"
-    fi
-
-    if [[ -n "$DB_INITIALIZE" && -z "$(helm ls -q "^$name$")" ]]; then
-      echo "Deploying first release with database initialization..."
-      helm upgrade --install \
-        --wait \
-        --set service.enabled="$service_enabled" \
-        --set gitlab.app="$CI_PROJECT_PATH_SLUG" \
-        --set gitlab.env="$CI_ENVIRONMENT_SLUG" \
-        --set releaseOverride="$RELEASE_NAME" \
-        --set image.repository="$image_repository" \
-        --set image.tag="$image_tag" \
-        --set image.pullPolicy=IfNotPresent \
-        --set image.secrets[0].name="$secret_name" \
-        --set application.track="$track" \
-        --set application.database_url="$DATABASE_URL" \
-        --set application.secretName="$APPLICATION_SECRET_NAME" \
-        --set application.secretChecksum="$APPLICATION_SECRET_CHECKSUM" \
-        --set service.commonName="le-$CI_PROJECT_ID.$KUBE_INGRESS_BASE_DOMAIN" \
-        --set service.url="$CI_ENVIRONMENT_URL" \
-        --set service.additionalHosts="$additional_hosts" \
-        --set replicaCount="$replicas" \
-        --set postgresql.enabled="$postgres_enabled" \
-        --set postgresql.nameOverride="postgres" \
-        --set postgresql.postgresUser="$POSTGRES_USER" \
-        --set postgresql.postgresPassword="$POSTGRES_PASSWORD" \
-        --set postgresql.postgresDatabase="$POSTGRES_DB" \
-        --set postgresql.imageTag="$POSTGRES_VERSION" \
-        --set application.initializeCommand="$DB_INITIALIZE" \
-        $HELM_UPGRADE_EXTRA_ARGS \
-        --namespace="$KUBE_NAMESPACE" \
-        "$name" \
-        chart/
-
-      echo "Deploying second release..."
-      helm upgrade --reuse-values \
-        --wait \
-        --set application.initializeCommand="" \
-        --set application.migrateCommand="$DB_MIGRATE" \
-        $HELM_UPGRADE_EXTRA_ARGS \
-        --namespace="$KUBE_NAMESPACE" \
-        "$name" \
-        chart/
-    else
-      echo "Deploying new release..."
-      helm upgrade --install \
-        --wait \
-        --set service.enabled="$service_enabled" \
-        --set gitlab.app="$CI_PROJECT_PATH_SLUG" \
-        --set gitlab.env="$CI_ENVIRONMENT_SLUG" \
-        --set releaseOverride="$RELEASE_NAME" \
-        --set image.repository="$image_repository" \
-        --set image.tag="$image_tag" \
-        --set image.pullPolicy=IfNotPresent \
-        --set image.secrets[0].name="$secret_name" \
-        --set application.track="$track" \
-        --set application.database_url="$DATABASE_URL" \
-        --set application.secretName="$APPLICATION_SECRET_NAME" \
-        --set application.secretChecksum="$APPLICATION_SECRET_CHECKSUM" \
-        --set service.commonName="le-$CI_PROJECT_ID.$KUBE_INGRESS_BASE_DOMAIN" \
-        --set service.url="$CI_ENVIRONMENT_URL" \
-        --set service.additionalHosts="$additional_hosts" \
-        --set replicaCount="$replicas" \
-        --set postgresql.enabled="$postgres_enabled" \
-        --set postgresql.nameOverride="postgres" \
-        --set postgresql.postgresUser="$POSTGRES_USER" \
-        --set postgresql.postgresPassword="$POSTGRES_PASSWORD" \
-        --set postgresql.postgresDatabase="$POSTGRES_DB" \
-        --set postgresql.imageTag="$POSTGRES_VERSION" \
-        --set application.migrateCommand="$DB_MIGRATE" \
-        $HELM_UPGRADE_EXTRA_ARGS \
-        --namespace="$KUBE_NAMESPACE" \
-        "$name" \
-        chart/
-    fi
-
-    if [[ -z "$ROLLOUT_STATUS_DISABLED" ]]; then
-      kubectl rollout status -n "$KUBE_NAMESPACE" -w "$ROLLOUT_RESOURCE_TYPE/$name"
-    fi
-  }
-
-  function scale() {
-    track="${1-stable}"
-    percentage="${2-100}"
-    name=$(deploy_name "$track")
-
-    replicas=$(get_replicas "$track" "$percentage")
-
-    if [[ -n "$(helm ls -q "^$name$")" ]]; then
-      helm upgrade --reuse-values \
-        --wait \
-        --set replicaCount="$replicas" \
-        --namespace="$KUBE_NAMESPACE" \
-        "$name" \
-        chart/
-    fi
-  }
-
-  function install_dependencies() {
-    apk add -U openssl curl tar gzip bash ca-certificates git
-    curl -sSL -o /etc/apk/keys/sgerrand.rsa.pub https://alpine-pkgs.sgerrand.com/sgerrand.rsa.pub
-    curl -sSL -O https://github.com/sgerrand/alpine-pkg-glibc/releases/download/2.28-r0/glibc-2.28-r0.apk
-    apk add glibc-2.28-r0.apk
-    rm glibc-2.28-r0.apk
-
-    curl -sS "https://kubernetes-helm.storage.googleapis.com/helm-v${HELM_VERSION}-linux-amd64.tar.gz" | tar zx
-    mv linux-amd64/helm /usr/bin/
-    mv linux-amd64/tiller /usr/bin/
-    helm version --client
-    tiller -version
-
-    curl -sSL -o /usr/bin/kubectl "https://storage.googleapis.com/kubernetes-release/release/v${KUBERNETES_VERSION}/bin/linux/amd64/kubectl"
-    chmod +x /usr/bin/kubectl
-    kubectl version --client
-  }
-
-  function download_chart() {
-    if [[ ! -d chart ]]; then
-      auto_chart=${AUTO_DEVOPS_CHART:-gitlab/auto-deploy-app}
-      auto_chart_name=$(basename $auto_chart)
-      auto_chart_name=${auto_chart_name%.tgz}
-      auto_chart_name=${auto_chart_name%.tar.gz}
-    else
-      auto_chart="chart"
-      auto_chart_name="chart"
-    fi
-
-    helm init --client-only
-    helm repo add ${AUTO_DEVOPS_CHART_REPOSITORY_NAME:-gitlab} ${AUTO_DEVOPS_CHART_REPOSITORY:-https://charts.gitlab.io} ${AUTO_DEVOPS_CHART_REPOSITORY_USERNAME:+"--username" "$AUTO_DEVOPS_CHART_REPOSITORY_USERNAME"} ${AUTO_DEVOPS_CHART_REPOSITORY_PASSWORD:+"--password" "$AUTO_DEVOPS_CHART_REPOSITORY_PASSWORD"}
-    if [[ ! -d "$auto_chart" ]]; then
-      helm fetch ${auto_chart} --untar
-    fi
-    if [ "$auto_chart_name" != "chart" ]; then
-      mv ${auto_chart_name} chart
-    fi
-
-    helm dependency update chart/
-    helm dependency build chart/
-  }
-
-  function ensure_namespace() {
-    kubectl get namespace "$KUBE_NAMESPACE" || kubectl create namespace "$KUBE_NAMESPACE"
-  }
-
-  function check_kube_domain() {
-    if [[ -z "$KUBE_INGRESS_BASE_DOMAIN" ]]; then
-      echo "In order to deploy or use Review Apps,"
-      echo "KUBE_INGRESS_BASE_DOMAIN variables must be set"
-      echo "From 11.8, you can set KUBE_INGRESS_BASE_DOMAIN in cluster settings"
-      echo "or by defining a variable at group or project level."
-      echo "You can also manually add it in .gitlab-ci.yml"
-      false
-    else
-      true
-    fi
-  }
-
-  function initialize_tiller() {
-    echo "Checking Tiller..."
-
-    export HELM_HOST="localhost:44134"
-    tiller -listen ${HELM_HOST} -alsologtostderr > /dev/null 2>&1 &
-    echo "Tiller is listening on ${HELM_HOST}"
-
-    if ! helm version --debug; then
-      echo "Failed to init Tiller."
-      return 1
-    fi
-    echo ""
-  }
-
-  function create_secret() {
-    echo "Create secret..."
-    if [[ "$CI_PROJECT_VISIBILITY" == "public" ]]; then
-      return
-    fi
-
-    kubectl create secret -n "$KUBE_NAMESPACE" \
-      docker-registry gitlab-registry \
-      --docker-server="$CI_REGISTRY" \
-      --docker-username="${CI_DEPLOY_USER:-$CI_REGISTRY_USER}" \
-      --docker-password="${CI_DEPLOY_PASSWORD:-$CI_REGISTRY_PASSWORD}" \
-      --docker-email="$GITLAB_USER_EMAIL" \
-      -o yaml --dry-run | kubectl replace -n "$KUBE_NAMESPACE" --force -f -
-  }
-
-  function persist_environment_url() {
-      echo $CI_ENVIRONMENT_URL > environment_url.txt
-  }
-
-  function delete() {
-    track="${1-stable}"
-    name=$(deploy_name "$track")
-
-    if [[ -n "$(helm ls -q "^$name$")" ]]; then
-      helm delete --purge "$name"
-    fi
-
-    secret_name=$(application_secret_name "$track")
-    kubectl delete secret --ignore-not-found -n "$KUBE_NAMESPACE" "$secret_name"
-  }
-
-before_script:
-  - *deploy_helpers