Using and Administering Linux, Volume 2 by 2023

Author:2023
Language: eng
Format: epub

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# Reboot the host #

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- name: Reboot this host if necessary and reboot extra variable is true

command: reboot

when: (check.stdout | regex_search('reboot will be required')) and

reboot == "true" and run == "true"

in this task we reboot the computer. execution of the playbook stops after that reboot so that i need to restart it. this time, because the updates have been installed, the power-off or reboot does not take place, and the next play is run.

Preparing the doUpdates.sh File

one of the tasks we created earlier copies the doupdates.sh bash program to the /root/

bin directory. we need to make a copy of that file available to our playbook so that it can

be copied.

Create the directory /root/ansible/updates/files and copy the doupdates.sh file into it.

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Chapter 30 automation with ansible

Testing

there is a tool, yamllint,3 that we can install to check and verify the syntax of the playbook.

this tool can simplify the task of finding those errors before we try to execute the playbook. it can be installed from the Fedora repository:

[root@studentvm1 ~]# dnf install -y yamllint

make /root/ansible/updates the pwD. First, run yamllint and correct any problems it reports:

$ yamllint doUpdates.yml

run this playbook using this command, which does not perform the updates or reboot. it does

give us a way to check the validity of our work, especially the Yaml structure. Getting the

Yaml whitespace just right was the hardest part for me:

# ansible-playbook doUpdates.yml

PLAY [Play 1 - Install updates on studentvm1 - the Ansible hub]

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