组中每个主机的 Ansible docker-compose

Question

I'm using Ansible with Docker Compose . As my docker-compose.yml (together with other dependencies which shall not be copied to the remote host) is located on the local machine, I'm running the playbook on localhost . But the services defined in the docker-compose file shall be executed on a remote host, defined in the hosts file using the docker_host variable.

Example:

# hosts
[webserver]
192.168.88.100
192.168.88.101
192.168.88.102

# playbook.yml
- hosts: localhost
  tasks:
  - docker_compose:
      docker_host: tcp://192.168.88.100:2375

In the playbook is now one explicit ip address defined. My goal is to execute this task for each host defined in the group webserver without the need to manually create the task for each ip address.

Is this possible with ansible?

Answer 1

I think you can do something like this :

# playbook.yml
- hosts: webserver
  tasks:
  - docker_compose:
      docker_host: "tcp://{{ ansible_eth0.ipv4.address }}:2375"
    delegate_to: localhost

{{ ansible_eth0.ipv4.address }} allows you to obtain the ip address of the host.

delegate_to: localhost allows you to specify localhost as the host to execute tasks on.