I recently started upgrading my servers and containers to Ubuntu 20.04. I made three Ansible playbooks to get information about which hosts I needed to update.
Reboot required
Lists servers that have pending kernel updates and needs to be rebooted.
---
- hosts: all !containers
vars:
ansible_python_interpreter: /usr/bin/python3
tasks:
- name: check if a reboot is required
shell: "[ -f /var/run/reboot-required ]"
failed_when: False
register: reboot_required
changed_when: reboot_required.rc == 0
notify: user_message
handlers:
- name: user_message
debug:
msg: "Reboot required"
Outputs:
ok: [alpha.lan.uctrl.net] => {
"msg": "Reboot required"
}
Ubuntu version
Lists hosts which have Ubuntu version below 20.0.
---
- hosts: all
vars:
ansible_python_interpreter: /usr/bin/python3
gather_facts: yes
become: false
tasks:
- name: System details
debug:
msg: '{{ ansible_distribution }} {{ ansible_distribution_version }}'
when:
- ansible_distribution == "Ubuntu"
- ansible_distribution_version is version('20.0', operator='lt', strict=True)
Outputs:
ok: [alpha.lan.uctrl.net] => {
"msg": "Ubuntu 18.04"
}
skipping: [zeta.lan.uctrl.net]
skipping: [epsilon.lan.uctrl.net]
skipping: [omicron.lan.uctrl.net]
Kernel version
Lists servers with kernel version below 5.0
---
- hosts: servers
become: yes
vars:
kernel_version: "{{ ansible_kernel.split('-')|first }}"
ansible_python_interpreter: /usr/bin/python3
tasks:
- name: 'kernel version from facts'
debug:
msg: '{{ ansible_kernel }}'
when:
- kernel_version is version('5.0', operator='lt', strict=True)
Outputs:
ok: [alpha.lan.uctrl.net] => {
"msg": "4.15.0-135-generic"
}
skipping: [zeta.lan.uctrl.net]
skipping: [epsilon.lan.uctrl.net]
skipping: [omicron.lan.uctrl.net]
