Parallel execution

[Tom De Blende]

Hi all,

From the docs, I read that by default, tasks within a playbook are executed in parallel. This behavior can be changed by using the serial directive.

Now I have simple playbook to update Red Hat servers. It looks like this:

---

# file: RedHat.yml

- name: update all packages

  yum:

    name: '*'

    state: latest

  notify:

    - reboot server

    - wait for server to restart

  tags:

    - update_all

The handlers look like this:

---

# file reboot.yml

- name: reboot server

  shell: shutdown -r now "Reboot triggered by Ansible."

  async: 0

  poll: 0

  ignore_errors: true

- name: wait for server to restart

  local_action: wait_for host="{{ec2_private_ip_address}}" port=22 delay=10 timeout=600 search_regex=OpenSSH

  become: false

This all works fine. However, from the sshd and yum logs, it looks like the update process was not executed in parallel on all hosts. Why would this be?

Kind regards,

Tom

[Brian Coca]

The parallelization is limited by number of forks (5 by default) you can change this on the command line with -f.

Be mindful that each fork consumes more resources on your controller machine, so you are mostly limited by available resources there.

----------

Brian Coca

[Tom De Blende]

Thanks Brian, that is indeed the case.

--
You received this message because you are subscribed to a topic in the Google Groups "Ansible Project" group.
To unsubscribe from this topic, visit https://groups.google.com/d/topic/ansible-project/LKgzv9o7V7M/unsubscribe.
To unsubscribe from this group and all its topics, send an email to ansible-proje...@googlegroups.com.
To post to this group, send email to ansible...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/ansible-project/CACVha7eOEdS%3DVRZQGPsLo4frbZ9aZDNwYvBOUo2oByMP-Dubzg%40mail.gmail.com.

For more options, visit https://groups.google.com/d/optout.