Multiple containers with same VIRTUAL_HOST without load balancing

[gaetsd]

Hi,

I want to know if there is a way to run a new container with a VIRTUAL_HOST already used by another container without load balancing.
I want to keep the older config until the old container isn't stopped.

I want be able to do this in order to have a migration of containers testing the new container before switch the nginx proxy. Now I have the load balancing when I start the new container.

[md5]

It sounds like you might want to test the container separately before starting it up with the VIRTUAL_HOST environment variable. In general I think the right way to do this is to use health checks and only have the health check return 200 after the app has been tested, but that's only available in Nginx Plus, not the Open Source version of Nginx.

[md5]

These discussions about being able to alter the labels on a running container seem relevant:

• Add labels to running Docker containers moby/moby#15496
• Implement docker update command moby/moby#15078

They don't help you right now though.