Strategies in ansible by Raj Gupta

By default Strategies in ansible is linear it means first task will complete on all client then only next task will start and so on....

[ansible@ip-172-31-80-19 ~]$ vi playbook100.yml
[ansible@ip-172-31-80-19 ~]$ cat playbook100.yml
-
  name: "this is our first playbook."
  hosts: all
  strategy: linearw
  tasks:
    -
      name: 'first task'
      apt: name='apache2' state='present'
    -
      name: 'secound task'
      command: touch /tmp/strategy_task2.txt
[ansible@ip-172-31-80-19 ~]$

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If you don't want to use linear Strategies then use free keyword

[ansible@ip-172-31-80-19 ~]$ vi playbook100.yml

[ansible@ip-172-31-80-19 ~]$ cat playbook100.yml

-

  name: "this is our first playbook."

  hosts: all

  strategy: free

  tasks:

    -

      name: 'first task'

      apt: name='apache2' state='present'

    -

      name: 'secound task'

      command: touch /tmp/strategy_task2.txt

[ansible@ip-172-31-80-19 ~]$

In this case all client are independent of each other it means if task is already install then it will run next task in place of waiting other client installation 

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By using serial we can tell at the time on how many client task will run .

Suppose we have 100 client by using this serial: 5  both the task will run on first 5 client then next 5 and so on.....

[ansible@ip-172-31-80-19 ~]$ vi playbook100.yml

[ansible@ip-172-31-80-19 ~]$ cat playbook100.yml

-

  name: "this is our first playbook."

  hosts: all

  serial: 5

  tasks:

    -

      name: 'first task'

      apt: name='apache2' state='present'

    -

      name: 'secound task'

      command: touch /tmp/strategy_task2.txt

[ansible@ip-172-31-80-19 ~]$