How to rebuild and update a container without downtime with docker-compose?

Question

I enjoy a lot using docker-compose.

Eg. on my server, when I want to update my app with minor changes, I only need to git pull origin master && docker-comp

Answer 1

You can use Swarm. Init swarm first by docker swarm init command and use healthcheck in docker-compose.yml.

Then run below command:

docker stack deploy -c docker-compose.yml project_name

instead of

docker-compose up -d.

When docker-compose.yml file is updated only run this command again:

docker stack deploy -c docker-compose.yml project_name

Docker Swarm will create new version of services and stop old version after that.