About
This page is about conditional operators in Ansible.
Operators
If
- Variable initialization
state : {{ "present"
if (ansible_distribution_release in
([ "wheezy", "jessie", "stretch",
"precise", "trusty", "xenial", "bionic" ]))
else "absent" }}
When
Loop
See Loop
Variable Controled
variable value can be made conditional.
Example:
- variables by type of operating system with include_vars
- name: Include version-specific variables for CentOS/RHEL.
include_vars: "RedHat-{{ ansible_distribution_version.split('.')[0] }}.yml"
when: ansible_distribution == 'CentOS' or
ansible_distribution == 'Red Hat Enterprise Linux' or
ansible_distribution == 'RedHat'
- Install a package for an Os where the package name is not the same by platform
- name: Install mapr-core
vars:
packages_Suse: ['mapr-compat-suse', 'mapr-core', 'mapr-core-internal']
packages_RedHat: ['mapr-core', 'mapr-core-internal']
packages_Debian: ['mapr-core', 'mapr-core-internal']
package: name={{ item }} state=present
with_items: "{{ vars['packages_' + ansible_os_family] }}"
register: core_result
Expression
Conditional statement that returns a boolean
- Boolean: Test if a variable is true
logrotate__enabled|bool
- File System condition
item.filename|d()
item.state is undefined
item.state == 'file'
item.state != 'absent'
- In
ansible_distribution_release in ([ "wheezy", "jessie", "stretch", "precise", "trusty", "xenial", "bionic" ])
- Logical
and # and
or # or
(a and b) # grouping