Problem with delegate_to to group in inventory

[Lucas Possamai]

Hi guys.

I'm trying to use the "delegate_to", to only run a certain task to a group in my inventory.

inventory file:

[zabbixprimary]

localhost ansible_port=2235 # zabbix primary

[zabbixslave]

localhost ansible_port=2236 # zabbix secondary

[zabbix:children]

zabbixprimary

zabbixslave

main.yml:

- name: Setup Zabbix and Grafana

hosts: zabbix

become: yes

become_user: root

gather_facts: False

task.yml:

- name: Enable Zabbix HA - primary

run_once: true

ansible.builtin.shell: sed -i 's/# HANodeName=/HANodeName={{ hostname_secondary }}/g' /etc/zabbix/zabbix_server.conf && sed -i 's/# NodeAddress=localhost:10051/NodeAddress={{ hostname_primary }}:10051/g' /etc/zabbix/zabbix_server.conf

when: not ansible_check_mode and zabbix_ha

delegate_to: zabbixprimary

- name: Enable Zabbix HA - secondary

run_once: true

ansible.builtin.shell: sed -i 's/# NodeAddress=localhost:10051/NodeAddress={{ hostname_secondary }}:10051/g' /etc/zabbix/zabbix_server.conf

when: not ansible_check_mode and zabbix_ha

delegate_to: zabbixslave

But I get an error:

fatal: [localhost -> zabbixprimary]: UNREACHABLE! => {"changed": false, "msg": "Failed to connect to the host via ssh: ssh: Could not resolve hostname zabbixprimary: nodename nor servname provided, or not known", "unreachable": true}

Am i doing it right? I couldn't find much information online about how to achieve this.

Thanks!

Lucas

[Lucas Possamai]

My bad.. managed to get it working by using: inventory_hostname in groups['zabbixslave']

Cheers! 

[Lucas Possamai]

Well... Didn't quite get it, actually.

My task.yml looks like this:

- name: Enable Zabbix HA - primary

ansible.builtin.shell: sed -i 's/# HANodeName=/HANodeName={{ hostname_secondary }}/g' /etc/zabbix/zabbix_server.conf && sed -i 's/# NodeAddress=localhost:10051/NodeAddress={{ hostname_primary }}:10051/g' /etc/zabbix/zabbix_server.conf

when: inventory_hostname in groups['zabbixprimary'] and zabbix_ha and not ansible_check_mode

delegate_to: "{{ item }}"

delegate_facts: true

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

- name: Enable Zabbix HA - secondary

ansible.builtin.shell: sed -i 's/# NodeAddress=localhost:10051/NodeAddress={{ hostname_secondary }}:10051/g' /etc/zabbix/zabbix_server.conf

when: inventory_hostname in groups['zabbixslave'] and zabbix_ha and not ansible_check_mode

delegate_to: "{{ item }}"

delegate_facts: true

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

 

However, looks like only one of the hosts is updated. Am I doing it right?

[Vladimir Botka]

On Wed, 15 Dec 2021 16:30:40 +1300

Lucas Possamai <drum....@gmail.com> wrote:

> On Wed, 15 Dec 2021 at 16:03, Lucas Possamai <drum....@gmail.com> wrote:
> >>
> >> inventory file:
> >> [zabbixprimary]
> >> localhost ansible_port=2235 # zabbix primary
> >>
> >> [zabbixslave]
> >> localhost ansible_port=2236 # zabbix secondary
> >>
> >> [zabbix:children]
> >> zabbixprimary
> >> zabbixslave
> >>

> >> - name: Enable Zabbix HA - primary
> >> ansible.builtin.shell: sed -i 's/# HANodeName=/HANodeName={{

> >> ...
> >> delegate_to: zabbixprimary

> >>
> >> fatal: [localhost -> zabbixprimary]: UNREACHABLE! => {"changed": false,
> >> "msg": "Failed to connect to the host via ssh: ssh: Could not resolve
> >> hostname zabbixprimary: nodename nor servname provided, or not known",
> >> "unreachable": true}

It's not possible to delegate a task to a group. Delegate to a host
instead. Change the inventory. For example

shell> cat hosts
zabbixprimary ansible_host=localhost ansible_port=2235
zabbixslave ansible_host=localhost ansible_port=2236

[zabbix]
zabbixprimary
zabbixslave

You should be able to delegate to the hosts. For example

- hosts: zabbix
tasks:
- shell: echo OK
delegate_to: zabbixprimary
run_once: true
- shell: echo OK
delegate_to: zabbixslave
run_once: true

should work as expected

TASK [shell] *********************************************
changed: [zabbixprimary -> zabbixprimary]

TASK [shell] *********************************************
changed: [zabbixprimary -> zabbixslave]

--
Vladimir Botka

[Lucas Possamai]

Interesting! And can I use the "delegate_to" command to more than one host at a time?

Cheers!

Lucas 

[Lucas Possamai]

Yes, I can! Using:

delegate_to: "{{ item }}"

delegate_facts: true

loop:

- zabbixslave

- zabbixslave02

 

Cheers!

Lucas 

[Vasily Klimov]

[zabbix]
zabbixprimary  ansible_host=IP_ADDRESS ansible_port=PORT

zabbixslave  ansible_host=IP_ADDRESS ansible_port=PORT


[zabbix:vars]
ansible_python_interpreter=/usr/bin/python3
ansible_user=login

ansible_password=password

Good luck.

среда, 15 декабря 2021 г. в 09:06:17 UTC+3, drum....@gmail.com:

[Todd Lewis]

BTW, your initial problem was that you had

    delegate_to: zabbixprimary

where you needed

    delegate_to: "{{ zabbixprimary }}"

But you're well past that now.

As my old CompSci prof. used to say, "Don't let these little things confuse you. Try to get confused on a higher level."