ansible-inventory

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Basic operations with your inventory

  • List managed hosts:
ansible all --list-hosts
ansible YOUR_GROUP --list-hosts
ansible-inventory --graph
ansible-inventory --list
To filter just one group of host: ansible-inventory --list | jq '.["YOUR_GROUP_NAME"]'
  • List defined groups
ansible localhost -m debug -a 'var=groups.keys()'
ansible localhost -m debug -a 'var=groups'

Inventory of managed nodes

https://www.digitalocean.com/community/tutorials/how-to-manage-multistage-environments-with-ansible Inventory is defined in /etc/ansible/hosts file. It allows you to define your managed hosts by hostname or IP address, and group them, such as "my_webservers_group" in our example in INI format.

Groups of groups, hierarchies, is also supported using (:children) keyword: [YOUR_NEW_GROUP_OF_GROUPS:children] [1]

#This is a example of a host configuration file. You can use # to include your comments on hosts file

foo_server.example.com
192.168.6.1
bar_server.example.com

[my_webservers_group]
foo5.example.com
bar6.example.com

[my_dbservers_group]
onedb1.example.com
twodb.example.com

#Example of a server alias on standard Ansible port
my_local_defined_hostname ansible_host=192.0.2.50

#Example of a server alias on a non standard Ansible port

my_jumper_server_alias ansible_host=192.0.2.50 ansible_port=5555 

You can also read Ansible best practices[2]

Activities

Help

See also

  • https://www.digitalocean.com/community/tutorials/how-to-manage-multistage-environments-with-ansible
  • http://docs.ansible.com/ansible/latest/user_guide/playbooks_best_practices.html