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Memory reservations have no effect #9902

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@ptr1120

Description

@ptr1120

Description
Specifying deploy.resources.reservations.memory for a service seems to have no effect with the latest compose version.

Steps to reproduce the issue:

  1. create a docker-compose.yml and specify resource limits.
services:

  nginx:
    image: nginx
    deploy:
      resources:
        limits:
          memory: 512M
        reservations:
          memory: 128M
  1. run docker compose up
  2. run docker inspect <nginx-comtainer-id> | grep Memory

Describe the results you received:

Output of docker inspect command

"Memory": 536870912,
"KernelMemory": 0,
"KernelMemoryTCP": 0,
"MemoryReservation": 0,
"MemorySwap": 1073741824,
"MemorySwappiness": null,

Describe the results you expected:

"Memory": 536870912,
"KernelMemory": 0,
"KernelMemoryTCP": 0,
"MemoryReservation": 134217728,
"MemorySwap": 1073741824,
"MemorySwappiness": null,

Additional information you deem important (e.g. issue happens only occasionally):

Output of docker compose version:

Docker Compose version v2.10.2

Output of docker info:

Client:
 Context:    default
 Debug Mode: false
 Plugins:
  app: Docker App (Docker Inc., v0.9.1-beta3)
  buildx: Docker Buildx (Docker Inc., v0.9.1-docker)
  compose: Docker Compose (Docker Inc., v2.10.2)
  scan: Docker Scan (Docker Inc., v0.17.0)

Server:
 Containers: 1
  Running: 1
  Paused: 0
  Stopped: 0
 Images: 1
 Server Version: 20.10.18
 Storage Driver: overlay2
  Backing Filesystem: extfs
  Supports d_type: true
  Native Overlay Diff: true
  userxattr: false
 Logging Driver: json-file
 Cgroup Driver: systemd
 Cgroup Version: 2
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
 Swarm: inactive
 Runtimes: io.containerd.runc.v2 io.containerd.runtime.v1.linux runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: 9cd3357b7fd7218e4aec3eae239db1f68a5a6ec6
 runc version: v1.1.4-0-g5fd4c4d
 init version: de40ad0
 Security Options:
  apparmor
  seccomp
   Profile: default
  cgroupns
 Kernel Version: 5.15.0-48-generic
 Operating System: Ubuntu 22.04.1 LTS
 OSType: linux
 Architecture: x86_64
 CPUs: 16
 Total Memory: 24.91GiB
 Name: xxx
 ID: xxx
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Registry: https://index.docker.io/v1/
 Labels:
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Live Restore Enabled: false

Additional environment details:

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