How to specify Memory & CPU limit in docker compose version 3

Question

I am unable to specify CPU & memory for services specified in version 3 .

With version 2 it works fine with "mem_limit" & "cpu_shares" parameters under the services . But it fails while using version 3 , putting them under deploy section doesn't seem worthy unless i am using swarm mode .

Can somebody help ?

version: "3"
services:
  node:
    build:
     context: .
      dockerfile: ./docker-build/Dockerfile.node
    restart: always
    environment:
      - VIRTUAL_HOST=localhost
    volumes:
      - logs:/app/out/
    expose:
      - 8083
    command: ["npm","start"]
    cap_drop:
      - NET_ADMIN
      - SYS_ADMIN

Answer 1

I know the topic is a bit old and seems stale, but anyway I was able to use these options:

    deploy:
      resources:
        limits:
          cpus: '0.001'
          memory: 50M

when using 3.7 version of docker-compose

What helped in my case, was using this command:

docker-compose --compatibility up

--compatibility flag stands for (taken from the documentation):

If set, Compose will attempt to convert deploy keys in v3 files to their non-Swarm equivalent

Think it's great, that I don't have to revert my docker-compose file back to v2.