related;
Description
docker image save will fail if the host platform image variant is not present locally.
Reproduce
For example, on a linux/amd64 host, if I pull the image for other platforms but not the host platform, then a subsequent docker image save fails:
$ docker image pull --platform linux/arm64/v8 alpine:latest && docker image pull --platform linux/riscv64 alpine:latest
$ docker image ls --tree
alpine:latest 8a1f59ffb675 24.6MB 7.65MB
├─ linux/amd64 08001109a7d6 0B 0B <<< Host platform image not yet pulled
├─ linux/arm/v6 a1c858aaff07 0B 0B
├─ linux/arm/v7 0b762e487f7a 0B 0B
├─ linux/arm64/v8 008448246686 13.3MB 4.14MB
├─ linux/386 af11d8e82a84 0B 0B
├─ linux/ppc64le b058f50906df 0B 0B
├─ linux/riscv64 d17c97e1ccf6 11.2MB 3.52MB
└─ linux/s390x 4b2235713e64 0B 0B
$ docker image save -o b.tar alpine:latest
Error response from daemon: unable to create manifests file: NotFound: content digest sha256:08001109a7d679fe33b04fa51d681bd40b975d8f5cea8c3ef6c0eccb6a7338ce: not found
If I then pull the image for the host platform, then things work:
$ docker image pull alpine:latest
$ docker image ls --tree
IMAGE ID DISK USAGE CONTENT SIZE EXTRA
alpine:latest 8a1f59ffb675 37.3MB 11.5MB
├─ linux/amd64 08001109a7d6 12.8MB 3.8MB <<< Host platform image pulled
├─ linux/arm/v6 a1c858aaff07 0B 0B
├─ linux/arm/v7 0b762e487f7a 0B 0B
├─ linux/arm64/v8 008448246686 13.3MB 4.14MB
├─ linux/386 af11d8e82a84 0B 0B
├─ linux/ppc64le b058f50906df 0B 0B
├─ linux/riscv64 d17c97e1ccf6 11.2MB 3.52MB
└─ linux/s390x 4b2235713e64 0B 0B
$ docker image save -o b.tar alpine:latest
Seem like a bug, AFAIK there's no requirement that the host platform image be present locally for docker save to succeed.
As an aside, things work if I explicitly pass the --platform option to docker image save (i.e., in that case the host platform image need not be present). This means that without --platform, the code is implicitly using --platform= which is not correct (i.e., Docker should just export all images that are present).
Expected behavior
docker image save should work regardless of whether the host platform image variant is locally present or not.
docker version
Client: Docker Engine - Community
Version: 28.1.1
API version: 1.49
Go version: go1.23.8
Git commit: 4eba377
Built: Fri Apr 18 09:52:10 2025
OS/Arch: linux/amd64
Context: default
docker info
Client: Docker Engine - Community
Version: 28.1.1
Context: default
Debug Mode: false
Plugins:
ai: Docker AI Agent - Ask Gordon (Docker Inc.)
Version: v1.1.7
Path: /home/cesar/.docker/cli-plugins/docker-ai
buildx: Docker Buildx (Docker Inc.)
Version: v0.23.0-desktop.1
Path: /home/cesar/.pinata/downloads/docker-plugins/v0.23.0-desktop.1/docker-buildx
cloud: Docker Cloud (Docker Inc.)
Version: v0.3.4
Path: /home/cesar/.docker/cli-plugins/docker-cloud
compose: Docker Compose (Docker Inc.)
Version: v2.36.0-desktop.1
Path: /home/cesar/.docker/cli-plugins/docker-compose
debug: Get a shell into any image or container (Docker Inc.)
Version: 0.0.41
Path: /home/cesar/.docker/cli-plugins/docker-debug
desktop: Docker Desktop commands (Docker Inc.)
Version: v0.1.9
Path: /home/cesar/.docker/cli-plugins/docker-desktop
dev: Docker Dev Environments (Docker Inc.)
Version: v0.1.2
Path: /home/cesar/.docker/cli-plugins/docker-dev
extension: Manages Docker extensions (Docker Inc.)
Version: v0.2.27
Path: /home/cesar/.docker/cli-plugins/docker-extension
init: Creates Docker-related starter files for your project (Docker Inc.)
Version: v1.4.0
Path: /home/cesar/.docker/cli-plugins/docker-init
mcp: Docker MCP Plugin (Docker Inc.)
Version: dev
Path: /home/cesar/.docker/cli-plugins/docker-mcp
sbom: View the packaged-based Software Bill Of Materials (SBOM) for an image (Anchore Inc.)
Version: 0.6.0
Path: /home/cesar/.docker/cli-plugins/docker-sbom
scout: Docker Scout (Docker Inc.)
Version: v1.17.1
Path: /home/cesar/.docker/cli-plugins/docker-scout
Server:
Containers: 0
Running: 0
Paused: 0
Stopped: 0
Images: 2
Server Version: 28.1.1
Storage Driver: overlayfs
driver-type: io.containerd.snapshotter.v1
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 sysbox-runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 05044ec0a9a75232cad458027ca83437aae3f4da
runc version: v1.2.6-0-ge89a2992
init version: de40ad0
Security Options:
apparmor
seccomp
Profile: builtin
cgroupns
Kernel Version: 6.8.0-60-generic
Operating System: Ubuntu 22.04.5 LTS
OSType: linux
Architecture: x86_64
CPUs: 16
Total Memory: 31.07GiB
Name: lenovo
ID: 8ed40529-7ef1-4165-89f8-d7fcca71d8a9
Docker Root Dir: /var/lib/docker
Debug Mode: false
Username: [email protected]
Experimental: false
Insecure Registries:
::1/128
127.0.0.0/8
Live Restore Enabled: false
Default Address Pools:
Base: 172.25.0.0/16, Size: 24Additional Info
No response
related;
Description
docker image savewill fail if the host platform image variant is not present locally.Reproduce
For example, on a linux/amd64 host, if I pull the image for other platforms but not the host platform, then a subsequent docker image save fails:
If I then pull the image for the host platform, then things work:
Seem like a bug, AFAIK there's no requirement that the host platform image be present locally for docker save to succeed.
As an aside, things work if I explicitly pass the --platform option to docker image save (i.e., in that case the host platform image need not be present). This means that without --platform, the code is implicitly using --platform= which is not correct (i.e., Docker should just export all images that are present).
Expected behavior
docker image saveshould work regardless of whether the host platform image variant is locally present or not.docker version
docker info
Additional Info
No response