in same playbook, create docker host and target that host

[Brian Grossman]

Say I've created a docker host with the docker_image and docker modules.

In the same playbook where I apply the role that creates the host, I'd like to apply a role to the newly created host.

The problem I'm running into is ansible's inventory doesn't know about the newly created host.  How can ansible know about the new host?  A dynamic inventory script that queries docker to return the hosts and IPs doesn't do it because of the caching ansible does.  Using that dynamic inventory script I have to call ansible on that playbook twice to get the desired result.

Anybody got any ideas or different approaches?

Here's a playbook to illustrate:

- hosts: localhost

  sudo: True

  roles:

    - { role: phusion-baseimage-ubuntu-14.04-docker, new_hostname: limbo }

- hosts: limbo

  roles:

    - limbo-packages

And here's the role main task:

- name: check or build container for {{ new_hostname }}

  docker_image: >

    path="docker-files/{{ new_hostname }}"

    name="xxx/limbo"

    state=present

- name: bring up container for {{ new_hostname }}

  docker: >

    dns=8.8.8.8

    hostname={{ new_hostname }}

    image=xxx/limbo

    state=present

    name="{{ new_hostname }}"

    expose=22

    ports="127.0.0.1:5022:22"

[Michael DeHaan]

This is the same "add_host" stuff that you would use as documented in the EC2 guide, more or less.

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[Brian Grossman]

Awesome!  Thank you.

[Brian Grossman]

Here's how I used Michael's kind advice:

- name: bring up container for {{ new_hostname }} from {{ image_name }}

  docker: >

    dns=8.8.8.8

    hostname={{ new_hostname }}

    image="{{ image_name }}"

    state=present

    name="{{ new_hostname }}"

    expose=22

    {{ docker_ports }}

- name: add {{ new_hostname }} to inventory

  add_host: name={{ new_hostname }}

    groups=docker

    ansible_ssh_host={{ item.NetworkSettings.IPAddress }}

    ansible_ssh_port=22

  when: item.Config.Hostname == "{{ new_hostname }}" and item.State.Running == True

  with_items: docker_containers

- name: "wait for {{ new_hostname }}'s sshd to come up"

  wait_for: host={{ new_hostname }} port=22 state=started

On Sunday, July 13, 2014 12:37:48 PM UTC-6, Michael DeHaan wrote: