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