I have been trying to add a host name to my hosts file using an Ansible playbook. My Ansible play look as below and my host file resides at /etc/ansible/hosts:
- name: adding host playbook
hosts: localhost
connection: local
tasks:
- name: add host to ansible host file
add_host:
name: myvm.cloud.azure.com
groups: mymasters
Playbook executes successfully, but the new host name is not added to the Ansible hosts file. Can anybody help me on this?
add_host module does not add a host to your inventory file, but instead creates and adds a host to an inventory existing only in memory. You can use this inventory in subsequent plays, but it won't be saved to a file.
If you really wanted to add a host to the inventory file with Ansible, you'd need to use a regular file-editing module, like lineinfile or blockinfile.
You can also trick inifile module to handle the Ansible inventory, but it's really a hack, as the inventory file does not really have a proper INI-file structure:
- ini_file:
dest: /etc/ansible/hosts
section: mymasters
option: myvm ansible_host
value: myvm.cloud.azure.com
no_extra_spaces: yes
You can use template to create hosts file.
Task File
---
- name: Create HostsFile
hosts: development
user: vagrant
become: yes
become_method: sudo
tasks:
- name: Run the Template
template: src=hostsFile.j2 dest=/tmp/file.conf owner=root group=root
Template File :- HostsFile.j2
{{ ansible_managed }}
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
{% for group in groups %}
{% if groups[group] and group != 'all' %}
{% for host in groups[group] %}
{{hostvars[host].ansible_default_ipv4.address}} {{ ansible_hostname }}
{% endfor %}
{% endif %}
{% endfor %}
