project/wait_for_lxc_ip.sh

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#!/bin/bash
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set -e
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LXC_INSTANCE_NAME=
# grab any modifications from the command line.
for i in "$@"; do
case $i in
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--lxd-name=*)
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LXC_INSTANCE_NAME="${i#*=}"
shift
;;
*)
echo "Unexpected option: $1"
exit 1
;;
esac
done
# if the invoker did not set the instance name, throw an error.
if [ -z "$LXC_INSTANCE_NAME" ]; then
echo "ERROR: The lxc instance name was not specified. Use '--lxc-name' when calling wait_for_lxc_ip.sh."
exit 1
fi
if ! lxc list --format csv | grep -q "$LXC_INSTANCE_NAME"; then
echo "ERROR: the lxc instance '$LXC_INSTANCE_NAME' does not exist."
exit 1
fi
IP_V4_ADDRESS=
while true; do
IP_V4_ADDRESS="$(lxc list "$LXC_INSTANCE_NAME" --format csv --columns=4 | grep enp5s0 | grep -Eo '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}')" || true
export IP_V4_ADDRESS="$IP_V4_ADDRESS"
if [ -n "$IP_V4_ADDRESS" ]; then
# give the machine extra time to spin up.
wait-for-it -t 300 "$IP_V4_ADDRESS:22"
break
else
sleep 1
printf '.'
fi
done
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# wait for cloud-init to complet before returning.
while lxc exec "$LXC_INSTANCE_NAME" -- [ ! -f /var/lib/cloud/instance/boot-finished ]; do
sleep 1
done