Transferring context is slow

aliaugmenta commented 4 months ago

Description

Recently, I noticed "Transferring context" during building some of the images in the same directly is taking much longer than before and than some other images in the same directory. For example, these are from different targets of the same Docker file:

 => => transferring context: 1.27kB          0.1s
...
 => => transferring context: 29.28MB         0.6s
...
 => => transferring context: 26.80MB         0.5s
...
 => => transferring context: 26.97MB         0.6s
...
 => => transferring context: 42.74MB         0.8s
...
 => => transferring context: 10.79MB       109.2s

Granted, the last one required more files to be copied to the image, but, I even with that 109 seconds does not make sense. There is a .dockerignore in the same directory as the Docker file with the following content:

.cache
.mypy_cache
.git
build/docs

I cannot share my Docker file. But, I will be happy to provide more debugging information.

Reproduce

buildx bake my_target_image

Expected behavior

Transferring context should be much faster.

docker version

Client:
 Version:           26.1.4
 API version:       1.45
 Go version:        go1.21.11
 Git commit:        5650f9b
 Built:             Wed Jun  5 11:29:54 2024
 OS/Arch:           windows/amd64
 Context:           desktop-linux

Server: Docker Desktop 4.31.1 (153621)
 Engine:
  Version:          26.1.4
  API version:      1.45 (minimum version 1.24)
  Go version:       go1.21.11
  Git commit:       de5c9cf
  Built:            Wed Jun  5 11:29:22 2024
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.6.33
  GitCommit:        d2d58213f83a351ca8f528a95fbd145f5654e957
 runc:
  Version:          1.1.12
  GitCommit:        v1.1.12-0-g51d5e94
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

docker info

Client:
 Version:    26.1.4
 Context:    desktop-linux
 Debug Mode: false
 Plugins:
  buildx: Docker Buildx (Docker Inc.)
    Version:  v0.14.1-desktop.1
    Path:     C:\Program Files\Docker\cli-plugins\docker-buildx.exe
  compose: Docker Compose (Docker Inc.)
    Version:  v2.27.1-desktop.1
    Path:     C:\Program Files\Docker\cli-plugins\docker-compose.exe
  debug: Get a shell into any image or container (Docker Inc.)
    Version:  0.0.32
    Path:     C:\Program Files\Docker\cli-plugins\docker-debug.exe
  dev: Docker Dev Environments (Docker Inc.)
    Version:  v0.1.2
    Path:     C:\Program Files\Docker\cli-plugins\docker-dev.exe
  extension: Manages Docker extensions (Docker Inc.)
    Version:  v0.2.24
    Path:     C:\Program Files\Docker\cli-plugins\docker-extension.exe
  feedback: Provide feedback, right in your terminal! (Docker Inc.)
    Version:  v1.0.5
    Path:     C:\Program Files\Docker\cli-plugins\docker-feedback.exe
  init: Creates Docker-related starter files for your project (Docker Inc.)
    Version:  v1.2.0
    Path:     C:\Program Files\Docker\cli-plugins\docker-init.exe
  sbom: View the packaged-based Software Bill Of Materials (SBOM) for an image (Anchore Inc.)
    Version:  0.6.0
    Path:     C:\Program Files\Docker\cli-plugins\docker-sbom.exe
  scout: Docker Scout (Docker Inc.)
    Version:  v1.9.3
    Path:     C:\Program Files\Docker\cli-plugins\docker-scout.exe

Server:
 Containers: 2078
  Running: 11
  Paused: 0
  Stopped: 2067
 Images: 1670
 Server Version: 26.1.4
 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: cgroupfs
 Cgroup Version: 1
 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: d2d58213f83a351ca8f528a95fbd145f5654e957
 runc version: v1.1.12-0-g51d5e94
 init version: de40ad0
 Security Options:
  seccomp
   Profile: unconfined
 Kernel Version: 5.15.153.1-microsoft-standard-WSL2
 Operating System: Docker Desktop
 OSType: linux
 Architecture: x86_64
 CPUs: 28
 Total Memory: 102.2GiB
 Name: docker-desktop
 ID: ac3c478f-f169-411c-a2fd-f895eb35eb6f
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 HTTP Proxy: http.docker.internal:3128
 HTTPS Proxy: http.docker.internal:3128
 No Proxy: hubproxy.docker.internal
 Labels:
  com.docker.desktop.address=npipe://\\.\pipe\docker_cli
 Experimental: false
 Insecure Registries:
  hubproxy.docker.internal:5555
  127.0.0.0/8
 Live Restore Enabled: false

WARNING: No blkio throttle.read_bps_device support
WARNING: No blkio throttle.write_bps_device support
WARNING: No blkio throttle.read_iops_device support
WARNING: No blkio throttle.write_iops_device support
WARNING: daemon is not using the default seccomp profile

Diagnostics ID

9C32F930-53AD-453F-801A-46C924A13C7F/20240701161148

Additional Info

No response

aliaugmenta commented 3 months ago

I experience this issue with Docker Desktop 4.32.0 too:

 => [internal] load build context                                               222.5s 
 => => transferring context: 12.39MB                                            222.5s

aliaugmenta commented 1 month ago

And with Docker Desktop 4.34.1 too:

 => [internal] load build context                                                                   188.6s
 => => transferring context: 15.20MB                                                                188.6s

@bsousaa , I'll be happy to help debug this issue.

aliaugmenta commented 1 month ago

And with Docker Desktop 4.34.2 too:

 => [internal] load build context                                                                   220.8s
 => => transferring context: 15.34MB                                                                220.7s

docker / for-win