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Unique deployment imagesΒΆ

We are create the deploy.sh file that Travis CI is going to execute:

# Build images
docker build -t deiveris/multi-client -f ./client/Dockerfile ./client
docker build -t deiveris/multi-server -f ./server/Dockerfile ./server
docker build -t deiveris/multi-worker -f ./worker/Dockerfile ./worker

# Push to Docker Hub
docker push deiveris/multi-client 
docker push deiveris/multi-server
docker push deiveris/multi-woker

# Apply configrations
kubectl apply -f k8s

# Imperatively set latest images on each deployment
kubectl set image deployments/server-deployment server=deiveris/multi-server

This deployment will not work perfectly, because it will set the latest tag to the deployments. Since the latest was already previously set, there will be no changes.

This can be fixed by using a git commit SHA checksum. Before we apply this, we will create new environment variables for travis:

sudo: required
services:
  - docker
env:
  global:
    - SHA = $(git rev-parse HEAD)
    - CLOUDSDK_CORE_DISABLE_PROMPTS=1
before_install:
  - openssl aes-256-cbc -K $encrypted_0c35eebf403c_key -iv $encrypted_0c35eebf403c_iv -in service-account.json.enc -out service-account.json -d
  - curl https://sdk.cloud.google.com | bash > /dev/null;
  - source $HOME/google-cloud-sdk/path.bash.inc
  - gcloud components update kubectl
  - gcloud auth activate-service-account --key-file service-account.json
  - gcloud config set project multi-k8s-236808
  - gcloud config set compute/zone europe-west1-c
  - gcloud container clusters get-credentials multi-cluster
  - echo "$DOCKER_PASSWORD" | docker login -u "$DOCKER_ID" --password-stdin
  - docker build -t deiveris/react-test -f ./client/Dockerfile.dev ./client

script:
  - docker run deiveris/react-test npm test -- --coverage

deploy:
  provider: script
  script: bash ./deploy.sh
  on: 
    branch: master

Now the deployment script will look like this:

# Build images
docker build -t deiveris/multi-client:latest -t deiveris/multi-client:$SHA -f ./client/Dockerfile ./client
docker build -t deiveris/multi-server:latest -t deiveris/multi-server:$SHA -f ./server/Dockerfile ./server
docker build -t deiveris/multi-worker:latest -t deiveris/multi-worker:$SHA -f ./worker/Dockerfile ./worker

# Push to Docker Hub

docker push deiveris/multi-client:latest
docker push deiveris/multi-server:latest
docker push deiveris/multi-woker:latest

docker push deiveris/multi-client:$SHA
docker push deiveris/multi-server:$SHA
docker push deiveris/multi-woker:$SHA

# Apply configrations
kubectl apply -f k8s

# Imperatively set latest images on each deployment
kubectl set image deployments/server-deployment server=deiveris/multi-server:$SHA
kubectl set image deployments/client-deployment client=deiveris/multi-client:$SHA
kubectl set image deployments/worker-deployment worker=deiveris/multi-worker:$SHA