automated series upgrade based on https://jujucharms.com/docs/2.3/howto-updateseries

upgrade-series.sh

#!/bin/bash -ex
#
# Usage:
#   ./upgrade-series.sh ceph-osd/1
#
# Based on https://jujucharms.com/docs/2.3/howto-updateseries
#

APPNAME=$(echo $1 | cut -d'/' -f1)
UNIT=$(echo $1 | cut -d'/' -f2)

tmpfile=$(mktemp)
exec_start_tpl=$(mktemp)

cat <<EOF > $exec_start_tpl
#!/usr/bin/env bash

# Set up logging.
touch '/var/log/juju/__AGENT__.log'
chown syslog:syslog '/var/log/juju/__AGENT__.log'
chmod 0600 '/var/log/juju/__AGENT__.log'
exec >> '/var/log/juju/__AGENT__.log'
exec 2>&1

# Run the script.
'/var/lib/juju/tools/__AGENT__/jujud' machine --data-dir '/var/lib/juju' --machine-id __MACHINE_ID__ --debug
EOF

service_tpl=$(mktemp)
cat <<EOF > $service_tpl
[Unit]
Description=juju agent for __AGENT__
After=syslog.target
After=network.target
After=systemd-user-sessions.service

[Service]
Environment=
LimitNOFILE=20000
ExecStart=/var/lib/juju/init/jujud-__AGENT__/exec-start.sh
Restart=on-failure
TimeoutSec=300

[Install]
WantedBy=multi-user.target
EOF

juju update-series $APPNAME xenial

echo 'DPkg::options { "--force-confold"; }' > $tmpfile
juju scp $tmpfile $APPNAME/$UNIT:/tmp/local
juju ssh $APPNAME/$UNIT "sudo cp /tmp/local /etc/apt/apt.conf.d/local && rm /tmp/local"
juju ssh $APPNAME/$UNIT "sudo apt-get update -qq && sudo apt-get install -yq screen"
juju ssh $APPNAME/$UNIT "screen sudo do-release-upgrade  -f DistUpgradeViewNonInteractive"

AGENT_CONF=$(juju ssh $APPNAME/$UNIT 'cd /etc/init/ ; ls jujud-machine-*.conf' | tr -d '\r')
AGENT_NAME=$(echo $AGENT_CONF | cut -d'.' -f1)

juju scp $exec_start_tpl $1:/tmp/exec_start_tpl
juju scp $service_tpl $1:/tmp/service_tpl


AGENT=$(echo $AGENT_NAME | cut -c 7-)
MACHINE_ID=$(echo $AGENT_NAME | rev | cut -d'-' -f1 | rev)
juju ssh $APPNAME/$UNIT "sudo mkdir -p /var/lib/juju/init/jujud-$AGENT"
juju ssh $APPNAME/$UNIT "sed s/__AGENT__/$AGENT/g /tmp/exec_start_tpl | sudo tee /var/lib/juju/init/jujud-$AGENT/exec-start.sh > /dev/null"
juju ssh $APPNAME/$UNIT "sudo sed -i s/__MACHINE_ID__/$MACHINE_ID/g /var/lib/juju/init/jujud-$AGENT/exec-start.sh"
juju ssh $APPNAME/$UNIT "sudo chmod 755 /var/lib/juju/init/jujud-$AGENT/exec-start.sh"
juju ssh $APPNAME/$UNIT "sed s/__AGENT__/$AGENT/g /tmp/service_tpl | sudo tee /var/lib/juju/init/jujud-$AGENT/jujud-$AGENT.service > /dev/null"
juju ssh $APPNAME/$UNIT "sudo sed -i s/__MACHINE_ID__/$MACHINE_ID/g /var/lib/juju/init/jujud-$AGENT/jujud-$AGENT.service"
juju ssh $APPNAME/$UNIT "sudo ln -s /var/lib/juju/init/jujud-$AGENT/jujud-$AGENT.service /etc/systemd/system/"
juju ssh $APPNAME/$UNIT "sudo ln -s /var/lib/juju/init/jujud-$AGENT/jujud-$AGENT.service /etc/systemd/system/multi-user.target.wants/jujud-$AGENT.service"
juju ssh $APPNAME/$UNIT "cd /var/lib/juju/tools ; ln -s ln -s 2.3.6-trusty-amd64 2.3.6-xenial-amd64"  # workaround for LP: #1749201
juju update-series $MACHINE_ID xenial