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firezone/scripts/gateway-docker-upgrade.sh

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#!/usr/bin/env bash
set -e
TARGET_IMAGE="ghcr.io/firezone/gateway:1"
REPO=$(dirname "$TARGET_IMAGE")
IMAGE=$(basename "$TARGET_IMAGE")
CURRENTLY_RUNNING=$(docker ps --format "{{.Names}} {{.Image}}" | grep -e "$TARGET_IMAGE" | awk '{print $1}')
if [ "$CURRENTLY_RUNNING" == "" ]; then
echo "No Firezone gateway found running on this system. Exiting."
exit -1
fi
echo "Pulling latest image..."
docker pull "$TARGET_IMAGE" > /dev/null
echo "Checking for containers to upgrade..."
for RUNNING_CONTAINER in $CURRENTLY_RUNNING
do
LATEST=$(docker inspect --format "{{.Id}}" "$TARGET_IMAGE")
RUNNING=$(docker inspect --format "{{.Image}}" "$RUNNING_CONTAINER")
RUNNING_NAME=$(docker inspect --format "{{.Name}}" "$RUNNING_CONTAINER" | sed 's~/~~g')
# Upgrade if necessary
if [ "$RUNNING" != "$LATEST" ]; then
echo -n "Upgrading gateway..."
docker container inspect "$RUNNING_CONTAINER" --format '{{join .Config.Env "\n"}}' | grep -v "PATH" > variables.env
docker stop "$RUNNING_CONTAINER" > /dev/null
docker rm -f "$RUNNING_CONTAINER" > /dev/null
docker run -d \
--restart=unless-stopped \
--pull=always \
--health-cmd="ip link | grep tun-firezone" \
--name="$RUNNING_NAME" \
--cap-add=NET_ADMIN \
--volume /var/lib/firezone \
--env-file variables.env \
--sysctl net.ipv4.ip_forward=1 \
--sysctl net.ipv4.conf.all.src_valid_mark=1 \
--sysctl net.ipv6.conf.all.disable_ipv6=0 \
--sysctl net.ipv6.conf.all.forwarding=1 \
--sysctl net.ipv6.conf.default.forwarding=1 \
--device="/dev/net/tun:/dev/net/tun" \
"$TARGET_IMAGE"
rm variables.env
echo "Container upgraded"
else
echo "Gateway is already up to date"
fi
done
echo "Done!"