How can I scale a service but apply a different cpuset on each instance with docker-compose ?
For example: I have 4 cpus, I want 4 instances, each using 1 unique cpu.
docker-compose scale with different cpuset
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What version of docker-compose are you using? I'm asking because accomplish what you desire is only possible with docker-compose v2.x or docker-swarm as you can see below.
you can check more info here in the docker doc.
supposing that you are using docker-compose 2.4, you can define a service like this in your `docker-compose.yaml
Where
cpu_countis number o cpu cores you want to use in the service, andmem_limitis the limit of memory that your service can consume.To define the number of replicas you must run:
docker-compose up --scale redis=2Where
redisis name of the service in the docker-compose and2is the number of replicas that you desire. So both the two containers will spin up with 1 core of CPU and 200m of memory.To check the container resources consumption you can run
docker statsSource: https://docs.docker.com/engine/reference/run/#runtime-constraints-on-resources
https://docs.docker.com/compose/compose-file/compose-file-v2/#cpu-and-other-resources