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ansible/examples/playbooks/conditionals_part1.yml

52 lines
1.5 KiB
YAML

---
# this is a demo of conditional imports. This is a powerful concept
# and can be used to use the same recipe for different types of hosts,
# based on variables that bubble up from the hosts from tools such
# as ohai or facter.
#
# Here's an example use case:
#
# what to do if the service for apache is named 'httpd' on CentOS
# but is named 'apache' on Debian?
# there is only one play in this playbook, it runs on all hosts
# as root
- hosts: all
user: root
# we have a common list of variables stored in /vars/external_vars.yml
# that we will always import
# next, we want to import files that are different per operating system
# and if no per operating system file is found, load a defaults file.
# for instance, if the OS was "CentOS", we'd try to load vars/CentOS.yml.
# if that was found, we would immediately stop. However if that wasn't
# present, we'd try to load vars/defaults.yml. If that in turn was not
# found, we would fail immediately, because we had gotten to the end of
# the list without importing anything.
vars_files:
- "vars/external_vars.yml"
- [ "vars/$facter_operatingsystem.yml", "vars/defaults.yml" ]
# and this is just a regular task line from a playbook, as we're used to.
# but with variables in it that come from above. Note that the variables
# from above are *also* available in templates
12 years ago
tasks:
- name: ensure apache is latest
action: $packager pkg=$apache state=latest
- name: ensure apache is running
action: service name=$apache state=running
- name: fail
action: command /bin/false
12 years ago