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# cloud-init-no-net
# the purpose of this job is
# * to block running of cloud-init until all network interfaces
# configured in /etc/network/interfaces are up
# * timeout if they all do not come up in a reasonable amount of time
start on mounted MOUNTPOINT=/ and stopped cloud-init-local
stop on static-network-up
task
console output
script
set +e # you cannot trap TERM reliably with 'set -e'
SLEEP_CHILD=""
static_network_up() {
local emitted="/run/network/static-network-up-emitted"
# /run/network/static-network-up-emitted is written by
# upstart (via /etc/network/if-up.d/upstart). its presense would
# indicate that static-network-up has already fired.
[ -e "$emitted" -o -e "/var/$emitted" ]
}
msg() {
local uptime="" idle=""
if [ -r /proc/uptime ]; then
read uptime idle < /proc/uptime
fi
echo "$UPSTART_JOB${uptime:+[${uptime}]}:" "$1"
}
handle_sigterm() {
# if we received sigterm and static networking is up then it probably
# came from upstart as a result of 'stop on static-network-up'
if [ -n "$SLEEP_CHILD" ]; then
if ! kill $SLEEP_CHILD 2>/dev/null; then
[ ! -d "/proc/$SLEEP_CHILD" ] ||
msg "hm.. failed to kill sleep pid $SLEEP_CHILD"
fi
fi
if static_network_up; then
msg "static networking is now up"
exit 0
fi
msg "recieved SIGTERM, networking not up"
exit 2
}
dowait() {
[ $# -eq 2 ] || msg "waiting $1 seconds for network device"
sleep "$1" &
SLEEP_CHILD=$!
wait $SLEEP_CHILD
SLEEP_CHILD=""
}
trap handle_sigterm TERM
# static_network_up already occurred
static_network_up && exit 0
dowait 5 silent
dowait 10
dowait 115
msg "gave up waiting for a network device."
: > /var/lib/cloud/data/no-net
end script
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