Docker compose file memory, cpu limits

Question

I am trying use memory and CPU in docker-compose file.

I get below error code:

The Compose file './docker-compose.yml' is invalid because: 
Unsupported config option for services.web: 'resources'

My docker-compose.yml file is below

version: '3'
services:
    web:
        build: .
        volumes:
            - "./app:/home"
        ports:
            - "8080:8080"       
        resources:
            limits:
                cpus: '0.001'
                memory: 512M

How can I use CPU, memory with in docker-compose?

Answer 1

Docker compose resources were introduced in file format version 3, which needs docker-compose 1.13 or newer. Chances are you are using an older version:. Check the output of:

docker-compose version

See the upgrade guide.

The OP uses docker-compose 1.12, which does not yet support version 3.

solved: I use version: '2' instead of version: '3' in docker-composer file and ı use mem_limit instead of resources

Answer 2

If you are using Docker Compose v.3 configs and running docker-compose up mode, then this can be useful.

This is not documented anywhere in docker-compose, but you can pass any valid system call setrlimit option in ulimits.

So, you can specify in docker-compose.yaml

ulimits: as: hard: 130000000 soft: 100000000

memory size is in bytes. After going over this limit your process will get memory allocation exceptions, which you may or may not trap.