golang scratch docker builder - gitlab ci yaml

.gitlab-ci.yaml

# Review and update variables in each stage as needed
# Pipeline uses gitlab k8 integration and a couple of custom containers
  ## The code is based on the gitlab autodevops yaml
# The pipeline builds two docker images
  ## First image is for development using Ubuntu as base (so you can debug inside the container)
  ## Second image is for production built from scratch
# Currently only the dev stage is deployed
  
cache:
  untracked: true
  key: $CI_COMMIT_REF_SLUG
  paths:
    - vendor/

variables:
  REPO_NAME: gitlab.com/sovchinn/hello_world

stages:
    - setup
    - test
    - compile
    - build
    - deploy

setup:
    stage: setup
    image: sovchinn/builder
    before_script:
      - mkdir -p $GOPATH/src/$REPO_NAME
      - ln -svf $CI_PROJECT_DIR/* $GOPATH/src/$REPO_NAME
      - cd $GOPATH/src/$REPO_NAME
    script:
      - "[ ! -f glide.yaml ] || glide install -v"
    artifacts:
      paths:
        - vendor/

test:
    stage: test
    image: golang:latest
    before_script:
      - mkdir -p $GOPATH/src/$REPO_NAME
      - ln -svf $CI_PROJECT_DIR/* $GOPATH/src/$REPO_NAME
      - cd $GOPATH/src/$REPO_NAME
    script:
      - go fmt $(go list ./... | grep -v /vendor/)
      - go vet $(go list ./... | grep -v /vendor/)
      - go test -race $(go list ./... | grep -v /vendor/)

build:go:dev:
    stage: compile
    image: golang:latest
    variables:
        CGO_ENABLED: 0
        GOOS: linux
    before_script:
      - mkdir -p $GOPATH/src/$REPO_NAME
      - ln -svf $CI_PROJECT_DIR/* $GOPATH/src/$REPO_NAME
      - cd $GOPATH/src/$REPO_NAME
    script:
      - go build -a -installsuffix cgo -o $CI_PROJECT_DIR/release
    artifacts:
      paths:
        - release

build:docker:dev:
    stage: build
    image: docker:latest
    variables:
      DOCKER_DRIVER: overlay2
      CI_APPLICATION_REPOSITORY: $CI_REGISTRY_IMAGE/$CI_COMMIT_REF_SLUG/dev
      CI_APPLICATION_TAG: dev_$CI_COMMIT_SHA
      BASE: ubuntu:zesty
    services:
      - docker:dind
    script:
      - docker build --cache-from $CI_APPLICATION_REPOSITORY/dev --build-arg BASE=$BASE -t "$CI_APPLICATION_REPOSITORY:$CI_APPLICATION_TAG" -t $CI_APPLICATION_REPOSITORY:latest .
      - docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" "$CI_REGISTRY"
      - docker push "$CI_APPLICATION_REPOSITORY:$CI_APPLICATION_TAG"
      - docker push $CI_APPLICATION_REPOSITORY:latest
    dependencies:
      - build:go:dev

build:go:prod:
    stage: compile
    image: golang:latest
    variables:
        CGO_ENABLED: 0
        GOOS: linux
    before_script:
      - mkdir -p $GOPATH/src/$REPO_NAME
      - ln -svf $CI_PROJECT_DIR/* $GOPATH/src/$REPO_NAME
      - cd $GOPATH/src/$REPO_NAME
    script:
      - go build -ldflags '-w -s' -a -installsuffix cgo -o $CI_PROJECT_DIR/release
    artifacts:
      paths:
        - release

build:docker:prod:
    stage: build
    image: docker:latest
    variables:
      DOCKER_DRIVER: overlay2
      CI_APPLICATION_REPOSITORY: $CI_REGISTRY_IMAGE/$CI_COMMIT_REF_SLUG/prod
      CI_APPLICATION_TAG: prod_$CI_COMMIT_SHA
      BASE: scratch
    services:
      - docker:dind
    script:
      - docker build --cache-from $CI_APPLICATION_REPOSITORY/prod --build-arg BASE=$BASE -t "$CI_APPLICATION_REPOSITORY:$CI_APPLICATION_TAG" -t $CI_APPLICATION_REPOSITORY:latest .
      - docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" "$CI_REGISTRY"
      - docker push "$CI_APPLICATION_REPOSITORY:$CI_APPLICATION_TAG"
      - docker push $CI_APPLICATION_REPOSITORY:latest
    dependencies:
      - build:go:prod

deploy:dev:
    stage: deploy
    image: sovchinn/deployer
    variables:
      APP_NAME: $CI_PROJECT_NAME-$CI_COMMIT_REF_SLUG
      CHART_TEMPLATE: sovchinn/deploy-app
      CI_APPLICATION_REPOSITORY: $CI_REGISTRY_IMAGE/$CI_COMMIT_REF_SLUG/dev
      CI_APPLICATION_TAG: dev_$CI_COMMIT_SHA
      SVC_INTERNAL_PORT: 8080
      SVC_PUBLISH_PORT: 80
      SVC_URL: $CI_PROJECT_NAME-$CI_COMMIT_REF_SLUG.local
      SVC_PROTOCOL: http
      REPLICAS: 1
      SERVICE_ENABLED: "true"
    before_script:
      - helm init --client-only
      - helm repo add stable https://kubernetes-charts.storage.googleapis.com/
      - helm repo add incubator https://kubernetes-charts-incubator.storage.googleapis.com/
      - helm repo add sovchinn https://charts.sergeovchinnikov.com
      - helm repo update
    script:
      - mkdir -p /root/.kube
      - cp /files/config /root/.kube/
      - helm fetch $CHART_TEMPLATE --untar
      - rm -Rf chart
      - mv $(basename $CHART_TEMPLATE) chart
      - helm dependency update chart
      - helm dependency build chart
      - helm upgrade --install 
        --wait 
        --set service.enabled=$SERVICE_ENABLED 
        --set releaseOverride=$CI_ENVIRONMENT_SLUG 
        --set image.repository=$CI_APPLICATION_REPOSITORY 
        --set image.tag=$CI_APPLICATION_TAG 
        --set image.pullPolicy=IfNotPresent 
        --set service.url=$CI_ENVIRONMENT_URL 
        --set service.internalPort=$SVC_INTERNAL_PORT
        --set service.externalPort=$SVC_PUBLISH_PORT
        --set replicaCount=$REPLICAS
        --namespace=$KUBE_NAMESPACE 
        --version=$CI_PIPELINE_ID-$CI_JOB_ID 
        $APP_NAME 
        chart/
    environment:
      name: dev
      url: $SVC_PROTOCOL://$SVC_URL