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Upgrading to Ubuntu 18.04 (Bionic Beaver)

Overview

In this guide, we will see how to upgrade an existing Ubuntu 16.04 based Cloudron to Ubuntu 18.04. Please note that Ubuntu 16.04 is not supported by Canonical anymore (ended in 2021). Cloudron supports only 18.04 and 20.04.

Cloudron 6.3 is the last version of Cloudron that supports Ubuntu 16.04.

Checklist

Before upgrading, please note the following:

  • Cloudron has to be on at least version 3.3. This can be verified by checking the version in the Settings view. Cloudron releases prior to 3.3 do not support Ubuntu 18.04.
  • Ubuntu has to be on version 16.04. Check the output of lsb_release -a to confirm this.
  • The upgrade takes around 1-3 hours based on various factors like network/cpu/disk etc

Pre-flight

Before starting the upgrade process, it's a good idea to create a server snapshot to rollback quickly. If your VPS does not have snapshotting feature, it's best to create a full Cloudron backup before attempting the upgrade (Backups -> Create Backup now).

Upgrading

Start the upgrade:

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dpkg --configure -a
do-release-upgrade

Upgrade notes:

  • Accept running an additional ssh deamon at port 1022
  • For all packages (nginx, timesyncd, journald etc), select N or O : keep your currently-installed version. This is the 'default'.
  • Accept removal of obsolete packages.
  • Restart the server in the end

Post Upgrade

Finishing the upgrade:

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systemctl stop systemd-resolved
systemctl disable systemd-resolved
systemctl restart unbound
systemctl status unbound # this should show 'active (running)'

If unbound is still not running, check the output of lsof -i :53. If it shows named, then:

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systemctl stop bind9
systemctl disable bind9
systemctl restart unbound
systemctl status unbound # this should show 'active (running)'

Post Upgrade Checks

lsb_release -a will output Ubuntu 18.04.