代码在 Dockerfile 中有效，但在 docker-compose.yml 中无效

Question

I have to docker procedures: 1) First one uses a Dockerfile and does docker build -t d1. and then docker run -p 4022:22 d1 2) Second one uses a docker-compose.yml file, launched by command docker-compose up

First one works, no error, second one fails, the command ansible-galaxy wich does https git operations never happens, but shows no error. Any Idea?

The Dockerfile content

FROM myregistry.org/ansible-rhel:admin

COPY . /home/ansible/playbook-ldap-myapp
WORKDIR /home/ansible/playbook-ldap-myapp
USER ansible
RUN ansible-galaxy install -fr requirements.yml --roles-path roles/

The docker-compose.yml content

version: '3'

networks:
  public: {}

volumes:
  playbook:
    driver: local
    driver_opts:
      type: none
      o: bind
      device: $PWD

services:
  ansible-admin:
    image: myregistry.org/ansible-rhel:admin
    ports:
      - '4022:22'
    networks:
      - public
    volumes:
      - playbook:/home/ansible/playbook-ldap-myapp
    working_dir: /home/ansible/playbook-ldap-myapp
    user: ansible
    command: ''
    command: 'ansible-galaxy install -fr requirements.yml --roles-path roles/'

Answer 1

In your docker-compose.yml you have two command: entries:

    command: ''
    command: 'ansible-galaxy install -fr requirements.yml --roles-path roles/'

Per the Docker Compose file version 3 reference at: https://docs.docker.com/compose/compose-file/

The command: attribute overrides the default executable that runs within your specified entrypoint, at run time.

There can only be one command , and the first command you have specified ostensibly causes additional command entries to be ignored.

Remove the command: '' line and your Ansible command should run. However it will be the only thing that runs.