myapp1

1. Write Dockerfile

   FROM scratch
   
   LABEL maintainer "Takahide Nogayama <[email protected]>"
   
   CMD ["/bin/bash"]

2. Write .travis.yml

   language: bash
   
   services:
     - docker
   
   before_install:
     - docker image build --tag nogayama/test1:latest .
   
   script:
     - echo hello

3. Go Travis CI Org with Github authentication

4. Enable travis

   

5. git add, commit, push

6. gem install travis

7. travis login --org

8. edit .travis.yml by travis command

   $ travis encrypt DOCKER_USERNAME=nogayama --add env.global
   $ travis encrypt DOCKER_PASSWORD=PASSWORD --add env.global

   • see Encrypting environment variables

9. add docker login to Dockerfile

10. add docker push. see pushing-a-docker-image-to-a-registry

    language: bash
    
    env:
      global:
      - secure: UrIeCrb ... gy4o=
      - secure: nbBGdzaz ... GGs4=
    
    services:
    - docker
    
    before_install:
    - docker image build --tag nogayama/myapp1:latest .
    - echo "$DOCKER_PASSWORD" | docker login -u "$DOCKER_USERNAME" --password-stdin
    - docker image push nogayama/myapp1:latest
    
    script:
    - echo hello

11. The logs at Travis-CI https://travis-ci.org/nogayama/myapp1 was

    Worker information
    60.11s0.01s0.00s0.01s
    system_info
    7Build system information
    341
    3420.02s0.00s0.38s0.50s1.03s0.00s0.04s0.00s0.01s0.01s0.01s0.01s0.01s0.00s0.00s0.03s0.00s0.01s0.39s0.00s0.00s0.00s0.01s0.00s0.07s0.00s0.01s0.00s0.02s0.04s0.00s5.07s0.00s1.20s
    docker_mtu
    343docker stop/waiting
    resolvconf
    345resolvconf stop/waiting
    services
    3473.02s$ sudo service docker start
    git.checkout
    3490.62s$ git clone --depth=50 --branch=master https://github.com/[secure]/myapp1.git [secure]/myapp1
    353
    3540.02s
    355Setting environment variables from repository settings
    356$ export DOCKER_USERNAME=[secure]
    357
    358Setting environment variables from .travis.yml
    359$ export DOCKER_USERNAME=[secure]
    360$ export DOCKER_PASSWORD=[secure]
    361
    362$ bash -c 'echo $BASH_VERSION'
    3634.3.11(1)-release
    364
    before_install.1
    3650.51s$ docker image build --tag [secure]/myapp1:latest .
    before_install.2
    3790.56s$ echo "$DOCKER_PASSWORD" | docker login -u "$DOCKER_USERNAME" --password-stdin
    before_install.3
    3812.39s$ docker image push [secure]/myapp1:latest
    3840.00s$ echo hello
    385hello
    386The command "echo hello" exited with 0.
    387
    388
    389Done. Your build exited with 0.
    
    

12. confirm the image is pushed on Docker Hub.