Allow scaling services with static ports on Swarm with affinity #1378
Description
Please, look at this config:
mynode:
image: myimage
environment:
- "affinity:container!=myproject_mynode_*"
ports:
- "50010:50010"Once I try to scale it with docker-compose scale mynode=3 it rejects to scale with the following error:
Service "mynode" cannot be scaled because it specifies a port on the host. If multiple containers for this service were created, the port would clash.
Remove the ":" from the port definition in docker-compose.yml so Docker can choose a random port for each container.
However, the ports won't clash because of the affinity.
Now, I'm forced to use net: host to avoid this.