Linux – Combine groups in ansible template

ansiblelinuxpython

Has anyone combined groups for a loop in ansible templates. What we want to do is get the common members of two groups and loop them through to create our config. We're trying the same format that works in the host limits but receive 'dict object' has no attribute 'tag_function_psql:&tag_release_dev'

{% for host in groups['tag_function_psql:&tag_release_dev'] %}

Best Answer

Ansible has the intersect filter. See Set Theory Filters.

{% for host in groups['tag_function_psql'] | intersect(groups['tag_release_dev']) %}
   ...
{% endfor %}

_{I answered this previously on stackoverflow}

Related Solutions

Ansible: Add IPs from inventory to /etc/hosts of all nodes

The previous answer simply does not work because it adds a new line for the same host instead of modifying the existing line when an IP Address for a host changes.

The following solution takes into account when the ip address changes for a specific server and handles it well by only modifying the line instead of adding duplicate entries.

---
- name: Add IP address of all hosts to all hosts
  lineinfile:
    dest: /etc/hosts
    regexp: '.*{{ item }}$'
    line: "{{ hostvars[item].ansible_host }} {{item}}"
    state: present
  when: hostvars[item].ansible_host is defined
  with_items: "{{ groups.all }}"

Ansible – Sharing Variables Between Plays on Amazon EC2

A value you set with set_fact will be available between different plays. Keep in mind that set_fact are set for a specific host. Your first play is run against localhost so the fact is part of the localhosts variables. So it the following play you should be able to access it with a task like this.

- debug:
    var: hostvars['localhost']['hostmap']

Best Answer

Related Solutions

Ansible: Add IPs from inventory to /etc/hosts of all nodes

Ansible – Sharing Variables Between Plays on Amazon EC2

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