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[BUG] up incorrectly recreates containers without changes + recreated containers have wrong files inside #12027

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@rivit98

Description

@rivit98

Description

Hi, I have the following problem:

I have a repository where each service has its own separate directory containing a Dockerfile (same for each service) and a file named flag.txt (different for each service, the contents follow the service name). I noticed that after executing docker compose -p test up --build twice, some containers are recreated, but there was no configuration change. What's more - the flag.txt inside the recreated containers is completely different than expected (see the video).

Repository is available here: https://github.com/rivit98/docker-compose-experiments

bug.mp4

Steps To Reproduce

  1. git clone https://github.com/rivit98/docker-compose-experiments
  2. cd docker-compose-experiments
  3. docker compose -p test up --build
  4. stop created containers with ctrl+c
  5. docker compose -p test up --build - observe that some containers were recreated even if there were no changes in configuration/files/etc. If there were no recreated containers go to step 4.
  6. find * -maxdepth 0 -type d | xargs -I{} bash -c "echo -n 'service: {} '; docker compose -p test exec -T {} cat /flag.txt; echo" - observe that containers that were recreated have wrong flag.txt file.

Compose Version

Docker Compose version v2.29.1

Docker Environment

Client: Docker Engine - Community
 Version:    27.1.1
 Context:    default
 Debug Mode: false
 Plugins:
  buildx: Docker Buildx (Docker Inc.)
    Version:  v0.16.1
    Path:     /usr/libexec/docker/cli-plugins/docker-buildx
  compose: Docker Compose (Docker Inc.)
    Version:  v2.29.1
    Path:     /usr/libexec/docker/cli-plugins/docker-compose

Server:
 Containers: 14
  Running: 14
  Paused: 0
  Stopped: 0
 Images: 19
 Server Version: 27.1.1
 Storage Driver: overlay2
  Backing Filesystem: extfs
  Supports d_type: true
  Using metacopy: false
  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 splunk syslog
 Swarm: inactive
 Runtimes: io.containerd.runc.v2 runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: 2bf793ef6dc9a18e00cb12efb64355c2c9d5eb41
 runc version: v1.1.13-0-g58aa920
 init version: de40ad0
 Security Options:
  apparmor
  seccomp
   Profile: builtin
  cgroupns
 Kernel Version: 6.8.0-39-generic
 Operating System: Ubuntu 24.04 LTS
 OSType: linux
 Architecture: x86_64
 CPUs: 1
 Total Memory: 961.6MiB
 Name: localhost
 ID: 204f59ae-1ecc-436e-b7ab-d883414c3c73
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Live Restore Enabled: false

Anything else?

No response

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