How to specify Memory CPU limit in docker compose version 3

Question

I am unable to specify CPU  amp  memory for services specified in version 3    With version 2 it works fine with  mem limit   amp   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

User · Answer

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.

User · Answer

Docker Compose does not support the deploy key  It s only respected when you use your version 3 YAML file in a Docker Stack   This message is printed when you add the deploy key to you docker-compose yml file and then run docker-compose up -d     WARNING  Some services  database  use the  deploy  key  which will be   ignored  Compose does not support  deploy  configuration - use docker   stack deploy to deploy to a swarm    The documentation  https   docs docker com compose compose-file  deploy  says      Specify configuration related to the deployment and running of   services  This only takes effect when deploying to a swarm with docker   stack deploy  and is ignored by docker-compose up and docker-compose   run

User · Answer

deploy    resources      limits        cpus   0 001        memory  50M     reservations        cpus   0 0001        memory  20M  More  https   docs docker com compose compose-file compose-file-v3  resources In you specific case  version   quot 3 quot  services    node      image  USER Your-Pre-Built-Image     environment        - VIRTUAL HOST localhost     volumes        - logs  app out      command    quot npm quot   quot start quot       cap drop        - NET ADMIN       - SYS ADMIN     deploy        resources          limits            cpus   0 001            memory  50M         reservations            cpus   0 0001            memory  20M  volumes    - logs  networks    default      driver  overlay  Note   Expose is not necessary  it will be exposed per default on your stack network  Images have to be pre-built  Build within v3 is not possible  quot Restart quot  is also deprecated  You can use restart under deploy with on-failure action You can use a standalone one node  quot swarm quot   v3 most improvements  if not all  are for swarm  Also Note  Networks in Swarm mode do not bridge  If you would like to connect internally only  you have to attach to the network  You can 1  specify an external network within an other compose file  or have to create the network with --attachable parameter  docker network create -d overlay My-Network --attachable  Otherwise you have to publish the port like this  ports    - 80 80

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

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