`--cache-from` takes longer than actual (cached) build
Open
Nobody has claimed this yet.
area/cache
kind/enhancement
- Dominant language
- Go
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- 2d 14h
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- 29
Description
Contributing guidelines
- I've read the contributing guidelines and wholeheartedly agree
I've found a bug and checked that ...
- ... the documentation does not mention anything about my problem
- ... there are no open or closed issues that are related to my problem
Description
When re-building a (large) multi staged Dockerfile, most time is spent in the --cache-from=type=registry step "importing cache manifest from docker.io/fenollexai/supergreen" while the (cached) build is actually over and done.
Expected behaviour
I'd expect that cache import be cancelled as soon as build is done. Especially since --cache-from cannot produce build errors.
Actual behaviour
Instead, my finished build is left hanging on the import step.
Buildx version
github.com/docker/buildx v0.29.1-desktop.1 28f6246ff24e2c05095e8741e48c48dcb2d3b4bc
Docker info
Client:
Version: 28.5.1
Context: desktop-linux
Debug Mode: false
Plugins:
ai: Docker AI Agent - Ask Gordon (Docker Inc.)
Version: v1.9.11
Path: /Users/pierre/.docker/cli-plugins/docker-ai
buildx: Docker Buildx (Docker Inc.)
Version: v0.29.1-desktop.1
Path: /Users/pierre/.docker/cli-plugins/docker-buildx
cloud: Docker Cloud (Docker Inc.)
Version: v0.4.39
Path: /Users/pierre/.docker/cli-plugins/docker-cloud
compose: Docker Compose (Docker Inc.)
Version: v2.40.2-desktop.1
Path: /Users/pierre/.docker/cli-plugins/docker-compose
debug: Get a shell into any image or container (Docker Inc.)
Version: 0.0.44
Path: /Users/pierre/.docker/cli-plugins/docker-debug
desktop: Docker Desktop commands (Docker Inc.)
Version: v0.2.0
Path: /Users/pierre/.docker/cli-plugins/docker-desktop
extension: Manages Docker extensions (Docker Inc.)
Version: v0.2.31
Path: /Users/pierre/.docker/cli-plugins/docker-extension
init: Creates Docker-related starter files for your project (Docker Inc.)
Version: v1.4.0
Path: /Users/pierre/.docker/cli-plugins/docker-init
mcp: Docker MCP Plugin (Docker Inc.)
Version: v0.24.0
Path: /Users/pierre/.docker/cli-plugins/docker-mcp
model: Docker Model Runner (Docker Inc.)
Version: v0.1.42
Path: /Users/pierre/.docker/cli-plugins/docker-model
sbom: View the packaged-based Software Bill Of Materials (SBOM) for an image (Anchore Inc.)
Version: 0.6.0
Path: /Users/pierre/.docker/cli-plugins/docker-sbom
scout: Docker Scout (Docker Inc.)
Version: v1.18.3
Path: /Users/pierre/.docker/cli-plugins/docker-scout
Server:
Containers: 3
Running: 1
Paused: 0
Stopped: 2
Images: 27
Server Version: 28.5.1
Storage Driver: overlayfs
driver-type: io.containerd.snapshotter.v1
Logging Driver: json-file
Cgroup Driver: cgroupfs
Cgroup Version: 2
Plugins:
Volume: local
Network: bridge host ipvlan macvlan null overlay
Log: awslogs fluentd gcplogs gelf journald json-file local splunk syslog
CDI spec directories:
/etc/cdi
/var/run/cdi
Discovered Devices:
cdi: docker.com/gpu=webgpu
Swarm: inactive
Runtimes: io.containerd.runc.v2 runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 05044ec0a9a75232cad458027ca83437aae3f4da
runc version: v1.2.5-0-g59923ef
init version: de40ad0
Security Options:
seccomp
Profile: builtin
cgroupns
Kernel Version: 6.10.14-linuxkit
Operating System: Docker Desktop
OSType: linux
Architecture: aarch64
CPUs: 8
Total Memory: 7.654GiB
Name: docker-desktop
ID: d987371f-97b4-4975-960d-8d656a6e354d
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
Username: fenollexai
Labels:
com.docker.desktop.address=unix:///Users/pierre/Library/Containers/com.docker.docker/Data/docker-cli.sock
Experimental: false
Insecure Registries:
hubproxy.docker.internal:5555
::1/128
127.0.0.0/8
Live Restore Enabled: false
Builders list
NAME/NODE DRIVER/ENDPOINT STATUS BUILDKIT PLATFORMS
supergreen docker-container
\_ supergreen0 \_ desktop-linux running v0.25.1 linux/amd64 (+2), linux/arm64, linux/arm (+2), linux/ppc64le, (3 more)
default docker
\_ default \_ default running v0.25.1 linux/amd64 (+2), linux/arm64, linux/ppc64le, linux/s390x, (2 more)
desktop-linux* docker
\_ desktop-linux \_ desktop-linux running v0.25.1 linux/amd64 (+2), linux/arm64, linux/ppc64le, linux/s390x, (2 more)
Configuration
BUILDX_BUILDER="supergreen" docker build --output=type=cacheonly --cache-from=type=registry,ref=docker.io/fenollexai/supergreen - </var/folders/c3/n7r_gdc56rb9fmdly4p20lk00000gn/T/cargo-green-fetch-692e2e6.Dockerfile
cargo-green-fetch-692e2e6_Dockerfile.txt
Build logs
[+] Building 3.5s (529/529) FINISHED docker-container:supergreen
=> [internal] load build definition from Dockerfile 0.0s
=> => transferring dockerfile: 49.10kB 0.0s
=> resolve image config for docker-image://docker.io/docker/dockerfile:1@sha256:b6afd42430b15f2d2a4c5a02b919e98a525b785b1aaff16747d2f623364e39b6 0.3s
=> CACHED docker-image://docker.io/docker/dockerfile:1@sha256:b6afd42430b15f2d2a4c5a02b919e98a525b785b1aaff16747d2f623364e39b6 0.0s
=> => resolve docker.io/docker/dockerfile:1@sha256:b6afd42430b15f2d2a4c5a02b919e98a525b785b1aaff16747d2f623364e39b6 0.0s
=> [internal] load metadata for docker.io/library/rust:1.90.0-slim 0.6s
=> [internal] load metadata for docker.io/moby/buildkit:latest 0.5s
=> [internal] load metadata for docker.io/docker/dockerfile:1 0.4s
=> [internal] load .dockerignore 0.0s
=> => transferring context: 2B 0.0s
=> importing cache manifest from docker.io/fenollexai/supergreen 2.1s
=> => inferred cache manifest type: application/vnd.oci.image.manifest.v1+json 0.0s
=> [docker.io-moby-buildkit-latest 1/1] FROM docker.io/moby/buildkit:latest@sha256:79cc6476ab1a3371c9afd8b44e7c55610057c43e18d9b39b68e2b0c2475cc1b6 0.0s
=> => resolve docker.io/moby/buildkit:latest@sha256:79cc6476ab1a3371c9afd8b44e7c55610057c43e18d9b39b68e2b0c2475cc1b6 0.0s
=> [cargo-fetch-1 119/127] ADD --chmod=0664 --unpack=true --checksum=sha256:cfe53a6657fd280eaa890a3bc59152892ffa3e30101319d168b781ed6529b049 https://static.crates.io/crates/yansi/yansi-1.0.1.crate / 0.0s
=> [cargo-fetch-1 125/127] ADD --chmod=0664 --unpack=true --checksum=sha256:d71e5d6e06ab090c67b5e44993ec16b72dcbaabc526db883a360057678b48502 https://static.crates.io/crates/zerofrom-derive/zerofrom-derive-0.1.6.crate / 0.0s
=> [cargo-fetch-0 120/127] ADD --chmod=0664 --unpack=true --checksum=sha256:d8a2f0d8d040d7848a709caf78912debcc3f33ee4b3cac47d73d1e1069e83507 https://static.crates.io/crates/portable-atomic-util/portable-atomic-util-0.2.4.crate / 0.0s
=> [cargo-fetch-0 125/127] ADD --chmod=0664 --unpack=true --checksum=sha256:626214629cda6781b6dc1d316ba307189c85ba657213ce642d9c77670f8202c8 https://static.crates.io/crates/quinn/quinn-0.11.8.crate / 0.0s
=> [cargo-fetch-1 124/127] ADD --chmod=0664 --unpack=true --checksum=sha256:50cc42e0333e05660c3587f3bf9d0478688e15d870fab3346451ce7f8c9fbea5 https://static.crates.io/crates/zerofrom/zerofrom-0.1.6.crate / 0.0s
=> [cargo-fetch-1 118/127] ADD --chmod=0664 --unpack=true --checksum=sha256:ea2f10b9bb0928dfb1b42b65e1f9e36f7f54dbdf08457afefb38afcdec4fa2bb https://static.crates.io/crates/writeable/writeable-0.6.1.crate / 0.0s
=> [cargo-fetch-0 124/127] ADD --chmod=0664 --unpack=true --checksum=sha256:89ae43fd86e4158d6db51ad8e2b80f313af9cc74f5c0e03ccb87de09998732de https://static.crates.io/crates/proc-macro2/proc-macro2-1.0.101.crate / 0.0s
=> [cargo-fetch-0 118/127] ADD --chmod=0664 --unpack=true --checksum=sha256:8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184 https://static.crates.io/crates/pin-utils/pin-utils-0.1.0.crate / 0.0s
=> [cargo-fetch-1 123/127] ADD --chmod=0664 --unpack=true --checksum=sha256:9ecf5b4cc5364572d7f4c329661bcc82724222973f2cab6f050a4e5c22f75181 https://static.crates.io/crates/zerocopy-derive/zerocopy-derive-0.8.26.crate / 0.0s
=> [cargo-fetch-0 123/127] ADD --chmod=0664 --unpack=true --checksum=sha256:3ae130e2f271fbc2ac3a40fb1d07180839cdbbe443c7a27e1e3c13c5cac0116d https://static.crates.io/crates/pretty_assertions/pretty_assertions-1.4.1.crate / 0.0s
=> [cargo-fetch-0 119/127] ADD --chmod=0664 --unpack=true --checksum=sha256:f84267b20a16ea918e43c6a88433c2d54fa145c92a811b5b047ccbe153674483 https://static.crates.io/crates/portable-atomic/portable-atomic-1.11.1.crate / 0.0s
=> [cargo-fetch-1 122/127] ADD --chmod=0664 --unpack=true --checksum=sha256:1039dd0d3c310cf05de012d8a39ff557cb0d23087fd44cad61df08fc31907a2f https://static.crates.io/crates/zerocopy/zerocopy-0.8.26.crate / 0.0s
=> [cargo-fetch-0 122/127] ADD --chmod=0664 --unpack=true --checksum=sha256:85eae3c4ed2f50dcfe72643da4befc30deadb458a9b590d720cde2f2b1e97da9 https://static.crates.io/crates/ppv-lite86/ppv-lite86-0.2.21.crate / 0.0s
=> [docker.io-library-rust-1.90.0-slim 1/1] FROM docker.io/library/rust:1.90.0-slim@sha256:7fa728f3678acf5980d5db70960cf8491aff9411976789086676bdf0c19db39e 0.0s
=> => resolve docker.io/library/rust:1.90.0-slim@sha256:7fa728f3678acf5980d5db70960cf8491aff9411976789086676bdf0c19db39e 0.0s
=> [cargo-fetch-1 121/127] ADD --chmod=0664 --unpack=true --checksum=sha256:38da3c9736e16c5d3c8c597a9aaa5d1fa565d0532ae05e27c24aa62fb32c0ab6 https://static.crates.io/crates/yoke-derive/yoke-derive-0.8.0.crate / 0.0s
=> [cargo-fetch-0 121/127] ADD --chmod=0664 --unpack=true --checksum=sha256:e5a7c30837279ca13e7c867e9e40053bc68740f988cb07f7ca6df43cc734b585 https://static.crates.io/crates/potential_utf/potential_utf-0.1.2.crate / 0.0s
=> [cargo-fetch-1 120/127] ADD --chmod=0664 --unpack=true --checksum=sha256:5f41bb01b8226ef4bfd589436a297c53d118f65921786300e427be8d487695cc https://static.crates.io/crates/yoke/yoke-0.8.0.crate / 0.0s
=> [docker.io-docker-dockerfile-1 1/1] FROM docker.io/docker/dockerfile:1@sha256:b6afd42430b15f2d2a4c5a02b919e98a525b785b1aaff16747d2f623364e39b6 0.0s
=> => resolve docker.io/docker/dockerfile:1@sha256:b6afd42430b15f2d2a4c5a02b919e98a525b785b1aaff16747d2f623364e39b6 0.0s
=> [cargo-fetch-2 2/2] ADD --chmod=0664 --unpack=true --checksum=sha256:5b96237efa0c878c64bd89c436f661be4e46b2f3eff1ebb976f7ef2321d2f58f https://static.crates.io/crates/zerovec-derive/zerovec-derive-0.11.1.crate / 0.0s
=> [cargo-fetch-1 127/127] ADD --chmod=0664 --unpack=true --checksum=sha256:36f0bbd478583f79edad978b407914f61b2972f5af6fa089686016be8f9af595 https://static.crates.io/crates/zerotrie/zerotrie-0.2.2.crate / 0.0s
=> [cargo-fetch-2 1/2] ADD --chmod=0664 --unpack=true --checksum=sha256:e7aa2bd55086f1ab526693ecbe444205da57e25f4489879da80635a46d90e73b https://static.crates.io/crates/zerovec/zerovec-0.11.4.crate / 0.0s
=> [cargo-fetch-0 127/127] ADD --chmod=0664 --unpack=true --checksum=sha256:fcebb1209ee276352ef14ff8732e24cc2b02bbac986cd74a4c81bcb2f9881970 https://static.crates.io/crates/quinn-udp/quinn-udp-0.5.13.crate / 0.0s
=> [cargo-fetch-1 126/127] ADD --chmod=0664 --unpack=true --checksum=sha256:ced3678a2879b30306d323f4542626697a464a97c0a07c9aebf7ebca65cd4dde https://static.crates.io/crates/zeroize/zeroize-1.8.1.crate / 0.0s
=> [cargo-fetch-0 126/127] ADD --chmod=0664 --unpack=true --checksum=sha256:49df843a9161c85bb8aae55f101bc0bac8bcafd637a620d9122fd7e0b2f7422e https://static.crates.io/crates/quinn-proto/quinn-proto-0.11.12.crate / 0.0s
=> [cargo-fetch-1 117/127] ADD --chmod=0664 --unpack=true --checksum=sha256:6f42320e61fe2cfd34354ecb597f86f413484a798ba44a8ca1165c58d42da6c1 https://static.crates.io/crates/wit-bindgen-rt/wit-bindgen-rt-0.39.0.crate / 0.0s
=> [cargo-fetch-0 117/127] ADD --chmod=0664 --unpack=true --checksum=sha256:3b3cff922bd51709b605d9ead9aa71031d81447142d828eb4a6eba76fe619f9b https://static.crates.io/crates/pin-project-lite/pin-project-lite-0.2.16.crate / 0.0s
=> [cargo-fetch-1 116/127] ADD --chmod=0664 --unpack=true --checksum=sha256:d135d17ab770252ad95e9a872d365cf3090e3be864a34ab46f48555993efc904 https://static.crates.io/crates/winsafe/winsafe-0.0.19.crate / 0.0s
=> [cargo-fetch-0 116/127] ADD --chmod=0664 --unpack=true --checksum=sha256:5be167a7af36ee22fe3115051bc51f6e6c7054c9348e28deb4f49bd6f705a315 https://static.crates.io/crates/pico-args/pico-args-0.5.0.crate / 0.0s
=> [cargo-fetch-1 115/127] ADD --chmod=0664 --unpack=true --checksum=sha256:21a0236b59786fed61e2a80582dd500fe61f18b5dca67a4a067d0bc9039339cf https://static.crates.io/crates/winnow/winnow-0.7.13.crate / 0.0s
=> [cargo-fetch-0 115/127] ADD --chmod=0664 --unpack=true --checksum=sha256:e3148f5046208a5d56bcfc03053e3ca6334e51da8dfb19b6cdc8b306fae3283e https://static.crates.io/crates/percent-encoding/percent-encoding-2.3.1.crate / 0.0s
truncated because of github form
=> CACHED [cargo-fetch-1 123/127] ADD --chmod=0664 --unpack=true --checksum=sha256:9ecf5b4cc5364572d7f4c329661bcc82724222973f2cab6f050a4e5c22f75181 https://static.crates.io/crates/zerocopy-derive/zerocopy-derive-0.8.26.crate / 0.0s
=> CACHED [cargo-fetch-1 124/127] ADD --chmod=0664 --unpack=true --checksum=sha256:50cc42e0333e05660c3587f3bf9d0478688e15d870fab3346451ce7f8c9fbea5 https://static.crates.io/crates/zerofrom/zerofrom-0.1.6.crate / 0.0s
=> CACHED [cargo-fetch-1 125/127] ADD --chmod=0664 --unpack=true --checksum=sha256:d71e5d6e06ab090c67b5e44993ec16b72dcbaabc526db883a360057678b48502 https://static.crates.io/crates/zerofrom-derive/zerofrom-derive-0.1.6.crate / 0.0s
=> CACHED [cargo-fetch-1 126/127] ADD --chmod=0664 --unpack=true --checksum=sha256:ced3678a2879b30306d323f4542626697a464a97c0a07c9aebf7ebca65cd4dde https://static.crates.io/crates/zeroize/zeroize-1.8.1.crate / 0.0s
=> CACHED [cargo-fetch-1 127/127] ADD --chmod=0664 --unpack=true --checksum=sha256:36f0bbd478583f79edad978b407914f61b2972f5af6fa089686016be8f9af595 https://static.crates.io/crates/zerotrie/zerotrie-0.2.2.crate / 0.0s
=> CACHED [cargo-fetch 2/6] COPY --from=cargo-fetch-1 / / 0.0s
=> CACHED [cargo-fetch-2 1/2] ADD --chmod=0664 --unpack=true --checksum=sha256:e7aa2bd55086f1ab526693ecbe444205da57e25f4489879da80635a46d90e73b https://static.crates.io/crates/zerovec/zerovec-0.11.4.crate / 0.0s
=> CACHED [cargo-fetch-2 2/2] ADD --chmod=0664 --unpack=true --checksum=sha256:5b96237efa0c878c64bd89c436f661be4e46b2f3eff1ebb976f7ef2321d2f58f https://static.crates.io/crates/zerovec-derive/zerovec-derive-0.11.1.crate / 0.0s
=> CACHED [cargo-fetch 3/6] COPY --from=cargo-fetch-2 / / 0.0s
=> CACHED [cargo-fetch 4/6] COPY --from=docker.io-docker-dockerfile-1 / /docker.io-docker-dockerfile-1 0.0s
=> CACHED [cargo-fetch 5/6] COPY --from=docker.io-library-rust-1.90.0-slim / /docker.io-library-rust-1.90.0-slim 0.0s
=> CACHED [cargo-fetch 6/6] COPY --from=docker.io-moby-buildkit-latest / /docker.io-moby-buildkit-latest 0.0s
Additional info
supergreen
- uses
Driver Options: image="docker.io/moby/buildkit:latest@sha256:79cc6476ab1a3371c9afd8b44e7c55610057c43e18d9b39b68e2b0c2475cc1b6" - also:
# docker logs 83725fd9ecec |& ag 'auto snapshotter'
time="2025-10-20T18:36:18Z" level=info msg="auto snapshotter: using overlayfs"
This is probably a buildkit issue however I am sorry I didn't take the time to turn this reproducer into a buildkit one.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Reproduce the delay with the supplied cargo-green-fetch-692e2e6.Dockerfile and the documented BUILDX_BUILDER command, then inspect the cache-manifest import step shown in the build logs. Done means a cached build no longer waits on cache import after the build has completed, while preserving the reported build result.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- docker, go
- Domain
- cli, performance
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 42/100