Ansible: `add_host` module is only executed once, on the first host to which the play applies

[robbwagoner]

Issue Type:

Bug Report

Similar to the report #9931

Ansible Version:

• Ansible 1.8.4 (detached HEAD ebc8d48d34) last updated 2015/04/14 17:59:44 (GMT +000)
• Ansible 1.9.0 (detached HEAD 717ffe2bea) last updated 2015/04/14 17:58:24 (GMT +000)
• Ansible 2.0.0 (devel 0345b675f8) last updated 2015/04/14 17:27:56 (GMT +000)
  

  Environment:

Ubuntu 14.04

Summary:

The add_host Task only executes on a single host in a play's host list.

Steps To Reproduce:

playbook

---
- name: Environment group_vars
  hosts: all
  gather_facts: no
  tasks:

    - debug: var=inventory_hostname

    - name: Add to group
      add_host: name={{inventory_hostname}} groups={{env}}

- name: Groups
  hosts: all
  gather_facts: no
  tasks:
    - debug: var=group_names
    - debug: var=groups[env]
    - fail: msg="done"

inventory file try.yml

10.0.0.70
10.0.1.171

execution

ansible-playbook -i ansible/try ansible/try.yml -e 'env=acceptance'

Expected Results:

I expect the task which uses the add_host module, Add to group, to execute twice: once for each host in the play. At the end of the play, each host would be in the group acceptance.

Actual Results:

PLAY [Environment group_vars] *************************************************

TASK: [debug var=inventory_hostname] ******************************************
ok: [10.0.0.70] => {
    "var": {
        "inventory_hostname": "10.0.0.70"
    }
}
ok: [10.0.1.171] => {
    "var": {
        "inventory_hostname": "10.0.1.171"
    }
}

TASK: [Add to group] **********************************************************
ok: [10.0.0.70]

PLAY [Groups] *****************************************************************                                                                                                                                                                                        [30/1905]

TASK: [debug var=group_names] *************************************************
ok: [10.0.0.70] => {
    "var": {
        "group_names": [
            "acceptance",
            "ungrouped"
        ]
    }
}
ok: [10.0.1.171] => {
    "var": {
        "group_names": [
            "ungrouped"
        ]
    }
}

TASK: [debug var=groups[env]] *************************************************
ok: [10.0.0.70] => {
    "var": {
        "groups[env]": [
            "10.0.0.70"
        ]
    }
}

TASK: [debug var=groups[env]] *************************************************
ok: [10.0.0.70] => {
    "var": {
        "groups[env]": [
            "10.0.0.70"
        ]
    }
}
ok: [10.0.1.171] => {
    "var": {
        "groups[env]": [
            "10.0.0.70"
        ]
    }
}

TASK: [fail msg="done"] *******************************************************
failed: [10.0.0.70] => {"failed": true}
msg: done
failed: [10.0.1.171] => {"failed": true}
msg: done

FATAL: all hosts have already failed -- aborting

[bcoca]

Possible Misunderstanding

Hi!

Thanks very much for your submission to Ansible. It sincerely means a lot to us.

We believe the ticket you have filed is being somewhat misunderstood, as one thing works a little differently than stated.

In particular, this is expected behavior, which is documented in this page (the note):

http://docs.ansible.com/add_host_module.html#id3

In the future, this might be a topic more well suited for the user list, which you can also post here if you'd like some more help with the above.

• https://groups.google.com/forum/#!forum/ansible-project

Thank you once again for this and your interest in Ansible!

[bcoca]

in any case you are not adding new hosts to inventory, you might want to use the group_by directive instead.

[elyzov]

@bcoca, and what if I want to add new host to inventory for each host from another group?