Ansible Playbook to Detect OS version

This playbook can be used to report the Linux Distribution, OS Family, Distribution Version, and Distribution Major Version. This can be helpful for verifying all operating systems are up to date, or for working out what to use in other playbooks.

You will need to already have an inventory file.

Playbook yaml file

The playbook is very simple. Copy and paste the following contents into a file named “os_info.yaml”

- hosts: all
  gather_facts: yes
  become: false
  - name: Distribution
    debug: msg=" distribution {{ ansible_distribution }} - os_family {{ ansible_os_family}} - distribution_version {{ansible_distribution_version}} - distribution_major_version {{ ansible_distribution_major_version }}"

If we wanted to, we could break out each Ansible variable in its own debug line. I prefer having them all on a single line.

Running the Playbook

Run the playbook like any other playbook. Change inventory.ini to your inventory file. If your inventory file is encrypted, use the –ask-vault-pass option.

ansible-playbook -i inventory.ini os_info.yaml 


Here are some example results.

< TASK [Distribution] >
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
                ||----w |
                ||     ||

ok: [almalinux_server01] => {
    "msg": " distribution AlmaLinux - os_family RedHat - distribution_version 9.3 - distribution_major_version 9"
ok: [fedora_server01] => {
    "msg": " distribution Fedora - os_family RedHat - distribution_version 39 - distribution_major_version 39"
ok: [centos_server] => {
    "msg": " distribution CentOS - os_family RedHat - distribution_version 7.9 - distribution_major_version 7"
ok: [ubuntu_serevr01] => {
    "msg": " distribution Ubuntu - os_family Debian - distribution_version 20.04 - distribution_major_version 20"

How to chroot into a Linux drive

Chrooting can be super useful for changing things like the root password, repairing grub bootloader etc., things that require the system to be mounted.  Typically if your chrooting into an OS drive you can boot up on a Live Linux distro, or use the Rescue feature on some Linux installers.

Mount main drive

Change sdb2 to the root partition of your drive.

mount /dev/sdb2 /mnt

Mount other stuff

mount -t proc none /mnt/proc
mount -o bind /dev /mnt/dev
mount -o bind /sys /mnt/sys
mount -o bind /run /mnt/run

If you want to, you can mount the boot partition.  Change sdb1 if your boot partition is something else.  For efi, you may need to mount the boot partition then mount the efi partition inside /boot/efi.

mount /dev/sdb1 /mnt/boot


 chroot /mnt

You should now be inside the chroot environment.  To exit the chroot, hit control+d or type exit.

If your having issues resolving DNS refer to this post.