/etc/maas/templates/power/virsh.template is in maas-cluster-controller 1.5+bzr2252-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 | # -*- mode: shell-script -*-
#
# Control virtual system's "power" through virsh.
#
# Parameters.
power_change={{power_change}}
power_address={{power_address}}
power_id={{power_id}}
virsh={{virsh}}
# Choose command for virsh to make the requested power change happen.
formulate_power_command() {
if [ ${power_change} = 'on' ]
then
echo 'start'
else
echo 'destroy'
fi
}
# Express system's current state as expressed by virsh as "on" or "off".
formulate_power_state() {
case $1 in
'running') echo 'on' ;;
'shut off') echo 'off' ;;
*)
echo "Got unknown power state from virsh: '$1'" >&2
exit 1
esac
}
# Issue command to virsh, for the given system.
issue_virsh_command() {
${virsh} --connect ${power_address} $1 ${power_id}
}
# Get the given system's power state: 'on' or 'off'.
get_power_state() {
virsh_state=$(issue_virsh_command domstate)
formulate_power_state ${virsh_state}
}
if [ "$(get_power_state)" != "${power_change}" ]
then
issue_virsh_command $(formulate_power_command)
fi
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