Linux

Ansible reboot Linux machine or server with playbooks

I need to reboot the VM or bare metal Linux machine/server using Ansible and wait for it to come back, but it does not work with playbook as descried here. How to reboot Linux server with Ansible? How do I reboot and wait for reboot to complete in Ansible playbook for multiple Linux servers?

Introduction: You can reboot a Linux or Unix based machine, wait for it to go down (say for kernel update), come back up, and respond to commands. You can use either command or shell module to reboot the Linux server when kernel updated. However, now we have a reboot module to reboot a machine using Ansible. I tested this module with:

  1. Ubuntu Linux 16.04 / 18.04 LTS
  2. CentOS Linux 7
  3. Debian Linux 9.x
  4. RHEL 7.x
  5. SUSE 12.x
  6. FreeBSD
  7. OpenBSD

Prerequisite

Please note that you must have Ansible version 2.7 to work with the reboot module:
$ ansible --version
Linux find out ansible version command
If not using Ansible version 2.7, try to update it using the dnf command/yum command/apt command/apt-get command as per your Linux distro version:
$ sudo apt update ## Debian or Ubuntu box ##
$ sudo yum update ## RHEL/CentOS 7 ##

Ansible reboot Linux machine or server with playbooks

The syntax is pretty simple to do reboot:

Here is a sample hosts file displayed using the cat command:

Here is my reboot.yml:

How to use Ansible reboot module playbook to reboot the box

Now all you have to do is run playbook (see how to set and use sudo password for Ansible Vault)
$ ansible-playbook -i hosts --ask-vault-pass --extra-vars '@cluster.data.yml' reboot.yml
Ansible reboot Linux machine or server with playbooks commands

How to reboot a machine and set time out value

By default Ansible reboot module waits 600 seconds. You can increase value using the following syntax:

How to set command to run on the rebooted host and expect success from to determine the machine is ready for further tasks

By default whoami command used by ansbile. You can change it as follows:

OR

How to set pre and post reboot delay

One can force Ansible to wait after the reboot was successful and the connection was re-established in seconds as follows:

The above is useful if you want wait for additional networking/storage or server vpn to kick in despite your connection already working. You can also set time for shutdown to wait before requesting reboot:

Conclusion

You just learned how to reboot Linux/Unix box and wait for reboot to complete in Ansible playbook. For more info see this page here.

Show More

Related Articles

Leave a Reply

Your email address will not be published. Required fields are marked *

Close