Docker - Continuous integration

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Docker integration with continuous integration system in order to build and publish

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Travis

Build and deployment script to Docker Hub

#!/bin/sh
docker login -e $DOCKER_EMAIL -u $DOCKER_USER -p $DOCKER_PASS
if [ "$TRAVIS_BRANCH" = "master" ]; then
    TAG="latest"
else
    TAG="$TRAVIS_BRANCH"
fi
docker build -f Dockerfile -t $TRAVIS_REPO_SLUG:$TAG .
docker push $TRAVIS_REPO_SLUG

where:

• docker command:
  • Docker - Login
  • Docker - Build (an image from a Dockerfile)
  • Docker - Push
• Travis System from Default-Environment-Variables
  • TRAVIS_REPO_SLUG is the slug (in form: owner_name/repo_name) of the repository currently being built. See Default-Environment-Variables
  • TRAVIS_BRANCH is the name of the branch.
• DOCKER_EMAIL, DOCKER_USER, DOCKER_PASS are Travis environment variable of the Travis repo.

Deployment to Heroku

#!/bin/sh
wget -qO- https://toolbelt.heroku.com/install-ubuntu.sh | sh
heroku plugins:install heroku-container-registry
docker login -e _ -u _ --password=$HEROKU_API_KEY registry.heroku.com
heroku container:push web --app $HEROKU_APP_NAME

.travis.yml configuration file

after_success:
  - sh .travis/deploy_dockerhub.sh
  - test “$TRAVIS_BRANCH” = “master” && sh .travis/deploy_heroku.sh

where:

• the file deploy_dockerhub.sh and deploy_heroku.sh are located under a .travis directory in the code repository.

Documentation / Reference

• https://medium.com/bettercode/how-to-build-a-modern-ci-cd-pipeline-5faa01891a5b