cyber-dojo/service-yaml

repo for the cyberdojo/service-yaml Docker image

• The source for the cyberdojo/service-yaml Docker image.
• Prints yaml for specified cyber-dojo services to stdout.
• Tees stdin to stdout allowing catted yml files to be blended into stdout.
• The stdout then becomes piped stdin and is consumed by docker-compose --file - (rather than from a named yml file).
• This design is because docker-compose cannot combine named yml files with yml from stdin.
  • So, instead, you must cat the yml files and pipe stdin into the docker run ... cyberdojo/service-yaml command (see the cat in the example below).
• Note that a docker-compose command receiving its yaml from stdin cannot base relative paths (in volume-mounts) from the directory of the yml file (since there isn't one). Instead it uses the current working directory. Caveat emptor.

Example:

$ cat docker-compose.yml \
   | docker run --rm --interactive cyberdojo/service-yaml \
          custom-start-points \
       exercises-start-points \
       languages-start-points \
                      creator \
                     selenium \
   | tee /tmp/augmented-docker-compose.peek.yml \
   | docker-compose \
       --file -     \
       up           \
       --detach

Here's docker-compose.yml

$ cat docker-compose.yml

version: '3.7'

services:
  client:
    build:
      args: [ COMMIT_SHA, CYBER_DOJO_CREATOR_CLIENT_PORT ]
      context: src/client
    depends_on:
      - selenium
    image: cyberdojo/creator-client
    ...

Here's the generated yml

$ cat /tmp/augmented-docker-compose.peek.yml

version: '3.7'

services:

  client:
    build:
      args: [ COMMIT_SHA, CYBER_DOJO_CREATOR_CLIENT_PORT ]
      context: src/client
    depends_on:
      - selenium
    image: cyberdojo/creator-client
    ...

  custom-start-points:
    image: ${CYBER_DOJO_CUSTOM_START_POINTS_IMAGE}:${CYBER_DOJO_CUSTOM_START_POINTS_TAG}
    ports: [ "${CYBER_DOJO_CUSTOM_START_POINTS_PORT}:${CYBER_DOJO_CUSTOM_START_POINTS_PORT}" ]
    read_only: true
    restart: "no"
    tmpfs: /tmp
    user: nobody

  exercises-start-points:
    image: ${CYBER_DOJO_EXERCISES_START_POINTS_IMAGE}:${CYBER_DOJO_EXERCISES_START_POINTS_TAG}
    ports: [ "${CYBER_DOJO_EXERCISES_START_POINTS_PORT}:${CYBER_DOJO_EXERCISES_START_POINTS_PORT}" ]
    read_only: true
    restart: "no"
    tmpfs: /tmp
    user: nobody


  languages-start-points:
    image: ${CYBER_DOJO_LANGUAGES_START_POINTS_IMAGE}:${CYBER_DOJO_LANGUAGES_START_POINTS_TAG}
    ports: [ "${CYBER_DOJO_LANGUAGES_START_POINTS_PORT}:${CYBER_DOJO_LANGUAGES_START_POINTS_PORT}" ]
    read_only: true
    restart: "no"
    tmpfs: /tmp
    user: nobody

  creator:
    depends_on:
      - custom-start-points
      - exercises-start-points
      - languages-start-points
      - saver
    image: ${CYBER_DOJO_CREATOR_IMAGE}:${CYBER_DOJO_CREATOR_TAG}
    ports: [ "${CYBER_DOJO_CREATOR_PORT}:${CYBER_DOJO_CREATOR_PORT}" ]
    read_only: true
    restart: "no"
    tmpfs: /tmp
    user: nobody

  saver:
    image: ${CYBER_DOJO_SAVER_IMAGE}:${CYBER_DOJO_SAVER_TAG}
    ports: [ "${CYBER_DOJO_SAVER_PORT}:${CYBER_DOJO_SAVER_PORT}" ]
    read_only: true
    restart: "no"
    tmpfs:
      - /cyber-dojo:uid=19663,gid=65533
      - /tmp:uid=19663,gid=65533
    user: saver

  selenium:
    image: selenium/standalone-firefox
    ports: [ "4444:4444" ]