This blog post will show you how to check how much disk space you have on a Ubuntu 20.04 server using an Ansible playbook.
Register
To achieve this task, I will be using two Ansible module, and the first is the Register variable. Register variables allow us to save the output of an Ansible task. In our case, I will use the register command to save the output of the dh -h command.
Debug
Using the debug module and the stdout_lines command I will output the result to my terminal screen.
Using this method allows me to check the disk space usage of one or multiple Ubuntu servers without needing to log in to each one of them and check it.
Playbook
Below is the full playbook with the register command the debug module. One thing to notice is that I am using stdout_lines and not stdout. The reason is that I like the output to be in lines.
--- - hosts: servers tasks: - name: command: df -h register: storage - debug: var=storage.stdout_lines
You can see the results below.
TASK [debug] ok: [ubuntu-server-01] => { "storage.stdout_lines": [ "Filesystem Size Used Avail Use% Mounted on", "udev 2.0G 0 2.0G 0% /dev", "tmpfs 394M 684K 393M 1% /run", "/dev/sda1 29G 2.1G 27G 8% /", "tmpfs 2.0G 0 2.0G 0% /dev/shm", "tmpfs 5.0M 0 5.0M 0% /run/lock", "tmpfs 2.0G 0 2.0G 0% /sys/fs/cgroup", "/dev/sda15 105M 6.1M 99M 6% /boot/efi", "/dev/sdb1 7.9G 36M 7.4G 1% /mnt", "tmpfs 394M 0 394M 0% /run/user/1000"
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