Re-using "register" variable in multiple tasks

[Dimitri Yioulos]

I have the following play in a playbook:

- hosts: talk

  gather_facts: false

  tasks:

    - name: win update

      win_updates:

        category: ['SecurityUpdates','CriticalUpdates','Updates','Tools','DefinitionUpdates','UpdateRollups']

      register: reboot_hint

I'd like to re-use reboot_hint in additional plays in the playbook via "when", but the playbook ultimately fails after the first "when", as in:

- hosts: talk

  gather_facts: false

  tasks:

    - name: start Lyris services

      win_service: name={{ item }} state=started start_mode=auto

      with_items: ["ListManager", "LyrisAlert"]

      when: (lyris_hint.rc == 0) and (reboot_hint.reboot_required == true) # ie, the ListManager service is installed and reboot is required

- hosts: admin2

  gather_facts: false

  sudo: yes

  tasks:

    - nagios: action=downtime minutes=10 author="Dimitri Yioulos" service=host host={{item}}

      with_items:

         - talk

      when: reboot_hint.reboot_required == true

      delegate_to: admin2

    - nagios: action=downtime minutes=20 author="Dimitri Yioulos" service=all host={{item}}

      with_items:

         - talk

      when: reboot_hint.reboot_required == true

      delegate_to: admin2

      tags:

         - nagios_downtime

- hosts: talk

  gather_facts: false

  tasks:

    - name: reboot server

      raw: 'cmd /c shutdown /r /t 0'

      when: reboot_hint.reboot_required == true

This is another of my Ansible 101 questions; help making it work is appreciated!

[Dimitri Yioulos]

I've found that my register variable only fails when applied to the play involving another host in my playbook.  After having poured over lots of posts from various other sources, I saw one that says, "use hostvars to access the register variables from a different host".  If, indeed, that's the solution, how do I use hostvars to achieve it?

[Brian Coca]

hostvars[<otherhost][<varname]

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Brian Coca

[Dimitri Yioulos]

Thanks, Brian.  OK, I'd like to use that in a "when" with the register variable "reboot_hint.reboot_required == true".  Will the following work?:

when: hostvars[myhost][reboot_hint.reboot_required == true]

On Wednesday, February 17, 2016 at 12:07:40 PM UTC-5, Dimitri Yioulos wrote:

[Brian Coca]

no, you are conflating several things there

when: hostvars[myhost]['reboot_hint']['reboot_required']

^ that will execute when reboot_required is true.

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Brian Coca

[Dimitri Yioulos]

OK.  Here's what I'm trying to accomplish:

- hosts: all

  gather_facts: false

  tasks:

    - name: win update

      win_updates:

        category: ['SecurityUpdates','CriticalUpdates','Updates','Tools','DefinitionUpdates','UpdateRollups']

      register: reboot_hint

- hosts: admin2

  gather_facts: false

  sudo: yes

  tasks:

    - nagios: action=downtime minutes=20 author="Dimitri Yioulos" service=host host={{item}}

      with_items: "{{ groups['lyris'] }}"

      delegate_to: admin2

#      when: hostvars[myhost]['reboot_hint']['reboot_required']

      tags:

         - nagios_downtime

    - nagios: action=downtime minutes=20 author="Dimitri Yioulos" service=all host={{item}}

      with_items: "{{ groups['lyris'] }}"

      delegate_to: admin2

#      when: hostvars[myhost]['reboot_hint']['reboot_required']

Since "reboot_hint" is coming from the previous play, and since the host or group to run the playbook against is defined at the command line, as in: "ansible-playbook -l lyris myplaybook.yml -u myuser", what do I specify in the [myhost] section?  This must be a variable to accept the host name OR group name I specified at the command line, but I don't know what that would be.

Further, and maybe another post altogether, how do I make the substitution in "with_items: "{{ groups['lyris'] }}"" so that I don't have to change e.g. lyris is I'm specifying another host or group in running the playbook?

With thanks,

Dimitri

On Wednesday, February 17, 2016 at 12:07:40 PM UTC-5, Dimitri Yioulos wrote: