39 lines
1.4 KiB
YAML
39 lines
1.4 KiB
YAML
---
|
|
|
|
# this is an example of how we can perform actions on a given host on behalf of all the hosts
|
|
# in a play.
|
|
#
|
|
# The two main uses of this would be signalling an outage window for hosts that
|
|
# we are going to start upgrading, or to take a machine out of rotation by talking to a load
|
|
# balancer.
|
|
#
|
|
# This example cheats by replacing the load balancer script with the 'echo' command,
|
|
# leaving actual communication with the load balancer as an exercise to the reader. In reality,
|
|
# you could call anything you want, the main thing is that it should do something with
|
|
# {{inventory_hostname}}
|
|
|
|
# NOTE: see batch_size_control.yml for an example of the 'serial' keyword, which you almost certainly
|
|
# want to use in this kind of example. Here we have a mocked up example that does something to
|
|
# 5 hosts at a time
|
|
|
|
- hosts: all
|
|
serial: 5
|
|
|
|
tasks:
|
|
|
|
- name: take the machine out of rotation
|
|
action: command echo taking out of rotation {{inventory_hostname}}
|
|
delegate_to: 127.0.0.1
|
|
|
|
# here's an alternate notation if you are delegating to 127.0.0.1, you can use 'local_action'
|
|
# instead of 'action' and leave off the 'delegate_to' part.
|
|
#
|
|
# - local_action: command echo taking out of rotation {{inventory_hostname}}
|
|
|
|
- name: do several things on the actual host
|
|
action: command echo hi mom {{inventory_hostname}}
|
|
|
|
- name: put machine back into rotation
|
|
action: command echo inserting into rotation {{inventory_hostname}}
|
|
delegate_to: 127.0.0.1
|
|
|