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How to add Dockerfiles to configuration file

The script that handles distributing build jobs across Travis CI shards relies on the parsefiles_config YAML file. This file contains a mapping from each application that has a Dockerfile to its corresponding weight/rank. The rank refers to the approximate running time of a Travis Docker build for that application's Dockerfile. When adding a new Dockerfile to the configuration repository, this configuration file needs to be manually updated in order to ensure that the Dockerfile is also built.

To modify configuration file:

  1. Edit the docker.mk file:

  2. Modify docker_test to include date commands.

    Replace

    $(docker_test)%: .build/%/Dockerfile.test
        docker build -t $*:test -f $< .
    

    with

    $(docker_test)%: .build/%/Dockerfile.test
        date
        docker build -t $*:test -f $< .
        date
    
  3. Replace the command that runs the dependency analyzer with a line to build your Dockerfiles.

    For example, if adding Dockerfile for ecommerce, rabbit mq, replace

    images:=$(if $(TRAVIS_COMMIT_RANGE),$(shell git diff --name-only $(TRAVIS_COMMIT_RANGE) | python util/parsefiles.py),$(all_images))

    with

    images:= ecommerce rabbitmq

  4. Replace the command that runs the balancing script with a line to build all images.

    Replace

    docker.test.shard: $(foreach image,$(shell echo $(images) | python util/balancecontainers.py $(SHARDS) | awk 'NR%$(SHARDS)==$(SHARD)'),$(docker_test)$(image))

    with

    docker.test.shard: $(foreach image,$(shell echo $(images) | tr ' ' '\n' | awk 'NR%$(SHARDS)==$(SHARD)'),$(docker_test)$(image))

  5. Commit and push to your branch.

  6. Wait for Travis CI to run the builds.

  7. Upon completion, examine the Travis CI logs to find where your Dockerfile was built (search for "docker build -t"). Your Dockerfile should be built by one of the build jobs with "MAKE_TARGET=docker.test.shard". Find the amount of time the build took by comparing the output of the date command before the build command starts and the date command after the build command completes.

  8. Round build time to a whole number, and add it to the configuration/util/parsefiles_config.yml file.

  9. Undo steps 2, 3, 4 to revert back to the original state of the docker.mk file.

  10. Commit and push to your branch. Your Dockerfile should now be built as a part of the Travis CI tests.