os-update-distro

#!/bin/bash
machines=($(juju machines | awk '{print $1}'| tail -n +2))
# preparing the machines for upgrade
for machine in ${machines[@]}
    do
	    echo ">> Working on $machine"
	    juju upgrade-series $machine prepare focal
done
echo ">> Press any key (aka as enter) to continue?"
read
# start with lxd containers
for machine in ${machines[@]}
    do
	if [[ $machine = *lxd* ]]; then
	    echo ">> Working on $machine"
	    juju scp ./release-upgrades $machine:.
	    juju ssh $machine sudo mv ./release-upgrades /etc/update-manager/release-upgrades
	    juju ssh $machine sudo apt update
	    juju ssh $machine sudo apt -y full-upgrade
	    juju ssh $machine sudo apt -y autoremove
####### DO NOT LEAVE THE ONE YOU UPGRADED UNCOMMENTED
#	    juju ssh $machine sudo add-apt-repository -y cloud-archive:wallaby
#	    juju ssh $machine sudo add-apt-repository -y cloud-archive:victoria
#######
	    juju ssh $machine sudo apt update
#	    juju ssh $machine sudo do-release-upgrade
	fi
done
# continuing with the physical machines
for machine in ${machines[@]}
    do
	if [[ $machine != *lxd* ]]; then
	    echo ">> Working on $machine"
	    juju scp ./release-upgrades $machine:.
	    juju ssh $machine sudo mv ./release-upgrades /etc/update-manager/release-upgrades
	    juju ssh $machine sudo apt update
	    juju ssh $machine sudo apt -y full-upgrade
	    juju ssh $machine sudo apt -y autoremove
####### DO NOT LEAVE THE ONE YOU UPGRADED UNCOMMENTED
#	    juju ssh $machine sudo add-apt-repository -y cloud-archive:wallaby
#	    juju ssh $machine sudo add-apt-repository -y cloud-archive:victoria
#######
	    juju ssh $machine sudo apt update
#	    juju ssh $machine sudo do-release-upgrade
	fi
done
# finishing the charm upgrade
watch -n 5 -c juju machines --color
echo ">> If all went fine press enter. If not... good luck :)"
read
for machine in ${machines[@]}
    do
	    echo ">> Working on $machine"
	    juju upgrade-series $machine complete
done
echo ">> Press any key to continue?"
read