While we will still build for 18.04, we will now stop testing against it. Instead, we will test against 20.04, the next EOL release after 18.04.
Once Ubuntu 18.04 is EOL, any references to it will also be removed.
Note that 18.04 support was already deprecated in Dokku 0.28.0, so this change is just acknowledging that deprecation.
This makes the installation a bit more secure by ensuring a user does not accidentally expose a way for unauthorized users to add new ssh keys to the system.
Additionally, this removes the extra HOSTNAME file to make the initial install process easier (that file was not modifiable by any dokku commands.
Closes#2247
Bring configuration in line with the latest Cloud init verison. Tested under 20.1.
Mainly done due to `debconf_selections` not working with the old syntac.
See the `debconf_selections` item under https://cloudinit.readthedocs.io/en/latest/topics/modules.html#apt-configure
Changes include:
- reboot when apt deems it necessary,
- define update and upgrade with the package syntax,
- bring apt sources and keys inline with apt syntax and
- dynamically get the right release by using the var '$RELEASE'.
[ci skip]
This cloudinit script had become outdated.
Changed 4 things:
- docker repository had moved
- use current docker gpg key
- use current dokku gpg key
- move over to ubuntu focal LTS 20.20
While the latest packages may continue to work on other releases, we will no longer officially support these releases, nor will we distribute packages.
