docker container rolling update script with docker-compose. service name: "web"

rolling-update.sh

#!/bin/sh

OLD_CONTAINER=$(docker ps --all --format "{{.Names}}" --filter name=web)

docker-compose pull web
docker-compose up -d --no-deps --scale web=2 --no-recreate web

NEW_CONTAINER=$(docker ps --all --format "{{.Names}}" --filter name=web | grep -v "$OLD_CONTAINER")
echo -n "Starting $NEW_CONTAINER ... "

while [ "$(docker ps --format "{{.Names}}" --filter name=web --filter health=healthy | grep "$NEW_CONTAINER")" = "" ]; do
    sleep 3s
done

echo '\e[38;5;002mdone\e[m'


echo -n "Stopping and removing $OLD_CONTAINER ... "

docker kill -s SIGTERM $OLD_CONTAINER 2>&1 > /dev/null
if [ $? -ne 0 ]; then
    exit 1
fi

while [ "$(docker ps --format "{{.Names}}" --filter name=web --filter status=running | grep "$OLD_CONTAINER")" = "$OLD_CONTAINER" ]; do
    sleep 3s
done

docker rm $OLD_CONTAINER 2>&1 > /dev/null
if [ $? -ne 0 ]; then
    exit 1
fi

echo '\e[38;5;002mdone\e[m'

docker-compose up -d --no-deps --scale web=1 --no-recreate web

docker image prune