Fix missing GPG key/fix NO PUBKEY errors while juju is deploying

juju-missing-gpg

juju-fix-missing-gpg-keys() {
	#search juju debug log for missing GPG keys and apply them to all servers in the model
	local -a MISSING_KEYS=($((juju debug-log --no-tail --replay|awk '/GPG error/{print $NF}')|sort -u))
	local -a MACHINES=($(juju machines|awk '/^[0-9]+/&&/started/{print $1}'))
	for k in ${MISSING_KEYS[@]};do printf "%s $k\n" ${MACHINES[@]};done|\
	xargs -n2 -P0 bash -c 'juju 2>/dev/null ssh $0 sudo apt-key 2>/dev/null adv --recv-key --keyserver keyserver.ubuntu.com $1'
}