set hostname on Alpine Linux

[skyfaller]

When I log in to Alpine Linux after running all roles, hostname is still localhost. sudo hostname dragon only works temporarily.

https://www.cyberciti.biz/faq/alpine-linux-change-hostname-computer-name/ suggests editing /etc/hostname to make it persist between reboots.

After doing this, you would have to run the motd and test page plays again to make them reflect the correct hostname.

[skyfaller]

I forgot I already encountered this bug before:

linode-caddy/roles/sunrise/tasks/main.yml

Lines 108 to 115 in 6f15ff8

	- name: set system's hostname
	hostname:
	name: "{{ local_hostname }}"
	# use: redhat # required on Alpine Linux: https://github.com/ansible/ansible/issues/77363
	# only for Ansible versions < 2.12.5 tho
	tags:
	- hostname
	when: ansible_os_family != 'Alpine'

The workaround is to enable the "redhat" methodology on Alpine Linux, which I'm currently doing manually.

The bug has already been fixed in the latest Ansible, but I'll leave this open until we either automate the workaround or we have the latest Ansible on all relevant systems.

[skyfaller]

Welp, I'm using ansible [core 2.12.5] on macOS and the bug doesn't seem to actually be fixed, and my workaround broke. Time to file another bug I guess?