This is a text-only version of the following page on https://raymii.org: --- Title : Ansible - Only if host is also in other hostgroup Author : Remy van Elst Date : 25-11-2014 URL : https://raymii.org/s/tutorials/Ansible_-_Only_if_host_is_also_in_other_hostgroup.html Format : Markdown/HTML --- This trick helps you execute actions only when a host is in another hostgroup in Ansible. For example, you might deploy munin-node via ansible, but you only want your apache and NGINX plugins deployed on your webservers, not on your database servers. I found this hard to find in the Ansible documentation, only in the mailing list was more information. This example playbook is rolled out to all the hosts (`hosts: all`), because all the hosts are monitored via Munin. In my ansible-hosts file I also have two groups, `webservers` and `databaseservers`. I only want my `http-status` plugin on the webservers, and the `postgres-status` plugin only on the datase servers. This is how you do that.

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Sample from the playbook: - name: Deploy munin http status code plugin copy: src: files/http-status dest: /usr/share/munin/plugins/http-status.sh owner: root group: root mode: 0755 - name: Deploy postgres status plugin copy: src: files/postgres-status dest: /usr/share/munin/plugins/posgres-status.py owner: root group: root mode: 0755 - name: Link munin apache plugin command: ln -sf /usr/share/munin/plugins/http-status /etc/munin/plugins/http-status when: "'webservers' in {{ group_names }}" - name: Link munin postgres plugin command: ln -sf /usr/share/munin/plugins/postgres-status.py /etc/munin/plugins/postgres-status when: "'databaseservers' in {{ group_names }}" In newer versions of Ansible you would replace the symlink command with the `file` module, that creates a symlink as well. By using the `when: "'GROUP_NAME' in {{ group_names }}"` statement in an action you get more control over the nodes specific actions are run on. [1]: https://www.digitalocean.com/?refcode=7435ae6b8212 --- License: All the text on this website is free as in freedom unless stated otherwise. This means you can use it in any way you want, you can copy it, change it the way you like and republish it, as long as you release the (modified) content under the same license to give others the same freedoms you've got and place my name and a link to this site with the article as source. This site uses Google Analytics for statistics and Google Adwords for advertisements. You are tracked and Google knows everything about you. Use an adblocker like ublock-origin if you don't want it. All the code on this website is licensed under the GNU GPL v3 license unless already licensed under a license which does not allows this form of licensing or if another license is stated on that page / in that software: This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . Just to be clear, the information on this website is for meant for educational purposes and you use it at your own risk. I do not take responsibility if you screw something up. Use common sense, do not 'rm -rf /' as root for example. If you have any questions then do not hesitate to contact me. See https://raymii.org/s/static/About.html for details.