docker save gives Error response from daemon: no suitable export target found:

Empieza reproduciendo el comando docker save --platform=linux/amd64 indicado con kserve/llmisvc-controller:v0.20.0 y, después, sigue cómo la CLI selecciona la plataforma del índice de imágenes local. Se considera terminado cuando docker save genere un archivo utilizable para linux/amd64 y ctr images import lo acepte sin el error «unrecognized image format».

Description

Hi there,

I'm trying to pull an image in my docker and then import it in my Kubernetes cluster's nodes (build by Kind). the pulls seem successful.

$ docker pull --platform=linux/amd64 kserve/llmisvc-controller:v0.20.0
v0.20.0: Pulling from kserve/llmisvc-controller
Digest: sha256:d502b5b56713b12d0e04127cdea76bd935402a0d7870d3c30dbf730349d86a95
Status: Image is up to date for kserve/llmisvc-controller:v0.20.0
docker.io/kserve/llmisvc-controller:v0.20.0

But when I import them in Kind nodes:

$ docker save --platform="linux/amd64" "kserve/llmisvc-controller:v0.20.0" | docker exec --privileged -i "cluster-demo-worker2" ctr --namespace=k8s.io images import --snapshotter=overlayfs -
Error response from daemon: no suitable export target found: image with reference kserve/llmisvc-controller:v0.20.0 was found but does not provide the specified platform (linux/amd64)
ctr: unrecognized image format

Reproduce

docker pull --platform=linux/amd64 kserve/llmisvc-controller:v0.20.0
docker save --platform="linux/amd64" "kserve/llmisvc-controller:v0.20.0" | echo

Expected behavior

No response

docker version

Client:
 Version:           29.7.2
 API version:       1.55
 Go version:        go1.26.5
 Git commit:        a7dcaa6
 Built:             Wed Aug  5 18:31:33 2026
 OS/Arch:           windows/amd64
 Context:           desktop-linux

Server: Docker Desktop 4.89.0 (238018)
 Engine:
  Version:          29.7.2
  API version:      1.55 (minimum version 1.40)
  Go version:       go1.26.5
  Git commit:       6a43e3d
  Built:            Wed Aug  5 18:28:36 2026
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          v2.3.3
  GitCommit:        aad11006b869517fcd3009450b6f82da282e1a9b
 runc:
  Version:          1.4.3
  GitCommit:        v1.4.3-0-gbb14dabe
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

docker info

Client:
 Version:    29.7.2
 Context:    desktop-linux
 Debug Mode: false
 Plugins:
  agent: Docker AI Agent Runner (Docker Inc.)
    Version:  v1.127.0
    Path:     C:\Users\C1\.docker\cli-plugins\docker-agent.exe
  ai: Docker AI Agent - Ask Gordon (Docker Inc.)
    Version:  v1.30.0
    Path:     C:\Users\C1\.docker\cli-plugins\docker-ai.exe
  buildx: Docker Buildx (Docker Inc.)
    Version:  v0.36.1-desktop.1
    Path:     C:\Users\C1\.docker\cli-plugins\docker-buildx.exe
  compose: Docker Compose (Docker Inc.)
    Version:  v5.5.0
    Path:     C:\Users\C1\.docker\cli-plugins\docker-compose.exe
  debug: Get a shell into any image or container (Docker Inc.)
    Version:  0.0.47
    Path:     C:\Users\C1\.docker\cli-plugins\docker-debug.exe
  desktop: Docker Desktop commands (Docker Inc.)
    Version:  v0.4.3
    Path:     C:\Users\C1\.docker\cli-plugins\docker-desktop.exe
  dhi: CLI for managing Docker Hardened Images (Docker Inc.)
    Version:  v0.0.7
    Path:     C:\Users\C1\.docker\cli-plugins\docker-dhi.exe
  extension: Manages Docker extensions (Docker Inc.)
    Version:  v0.2.31
    Path:     C:\Users\C1\.docker\cli-plugins\docker-extension.exe
  init: Creates Docker-related starter files for your project (Docker Inc.)
    Version:  v1.4.0
    Path:     C:\Users\C1\.docker\cli-plugins\docker-init.exe
  mcp: Docker MCP Plugin (Docker Inc.)
    Version:  v0.43.3
    Path:     C:\Users\C1\.docker\cli-plugins\docker-mcp.exe
  model: Docker Model Runner (Docker Inc.)
    Version:  v1.2.6
    Path:     C:\Users\C1\.docker\cli-plugins\docker-model.exe
  offload: Docker Offload (Docker Inc.)
    Version:  v0.6.13
    Path:     C:\Users\C1\.docker\cli-plugins\docker-offload.exe
  pass: Docker Pass Secrets Manager Plugin (beta) (Docker Inc.)
    Version:  v0.2.2
    Path:     C:\Users\C1\.docker\cli-plugins\docker-pass.exe
  sandbox: "docker sandbox" is deprecated, use Docker Sandboxes instead (Docker Inc.)
    Version:  v0.13.0
    Path:     C:\Users\C1\.docker\cli-plugins\docker-sandbox.exe
  scout: Docker Scout (Docker Inc.)
    Version:  v1.24.0
    Path:     C:\Users\C1\.docker\cli-plugins\docker-scout.exe

Server:
 Containers: 6
  Running: 3
  Paused: 3
  Stopped: 0
 Images: 52
 Server Version: 29.7.2
 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: nvidia runc io.containerd.runc.v2
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: aad11006b869517fcd3009450b6f82da282e1a9b
 runc version: v1.4.3-0-gbb14dabe
 init version: de40ad0
 Security Options:
  seccomp
   Profile: builtin
  cgroupns
 Kernel Version: 6.6.87.2-microsoft-standard-WSL2
 Operating System: Docker Desktop
 OSType: linux
 Architecture: x86_64
 CPUs: 12
 Total Memory: 31.02GiB
 Name: docker-desktop
 ID: 0b9e8bc1-b125-496b-bcaf-b6b579a96379
 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
  ::1/128
  127.0.0.0/8
 Live Restore Enabled: false
 Firewall Backend: iptables

Additional Info

Some context information:

$ docker image inspect   kserve/llmisvc-controller:v0.20.0   --format '{{.Os}}/{{.Architecture}}'
linux/amd64

$ docker image ls --tree \
  kserve/llmisvc-controller:v0.20.0
                                                                                                                                                                                             
IMAGE                               ID             DISK USAGE   CONTENT SIZE   EXTRA
kserve/llmisvc-controller:v0.20.0   d502b5b56713        185MB           50MB
├─ linux/amd64                      4bf78942d500        184MB         49.1MB
├─ linux/arm/v7                     be6453e834ba           0B             0B
├─ linux/arm64                      e0963c6adc62           0B             0B
├─ linux/ppc64le                    ff7e02dc8f4e           0B             0B
└─ linux/s390x                      dcfa3ce26f74           0B             0B

Note that the above output for linux/amd64 seems not to be valid, as it's printed with gray color font:

$ docker buildx imagetools inspect kserve/llmisvc-controller:v0.20.0

Name:      docker.io/kserve/llmisvc-controller:v0.20.0
MediaType: application/vnd.oci.image.index.v1+json
Digest:    sha256:d502b5b56713b12d0e04127cdea76bd935402a0d7870d3c30dbf730349d86a95

Manifests:
  Name:        docker.io/kserve/llmisvc-controller:v0.20.0@sha256:4bf78942d5009b2684decfe68d8f1c904b4a0f41711ec750869f16df0fd7ef29
  MediaType:   application/vnd.oci.image.manifest.v1+json
  Platform:    linux/amd64

  Name:        docker.io/kserve/llmisvc-controller:v0.20.0@sha256:be6453e834ba2fe6d797395c8e43ea42f011694b0d88ac2870075e94327d1222
  MediaType:   application/vnd.oci.image.manifest.v1+json
  Platform:    linux/arm/v7

  Name:        docker.io/kserve/llmisvc-controller:v0.20.0@sha256:e0963c6adc62593ada575cfb8224127ee50d335dd469f24be1093bbf68ab7cbb
  MediaType:   application/vnd.oci.image.manifest.v1+json
  Platform:    linux/arm64

  Name:        docker.io/kserve/llmisvc-controller:v0.20.0@sha256:ff7e02dc8f4e96eaf24371794225df0140d4309dfc7f6b498cbd9663e9c26b9e
  MediaType:   application/vnd.oci.image.manifest.v1+json
  Platform:    linux/ppc64le

  Name:        docker.io/kserve/llmisvc-controller:v0.20.0@sha256:dcfa3ce26f74bdaf669173b41ec20cdc3048f31d66dc046eb7f4d3ae2449c79c
  MediaType:   application/vnd.oci.image.manifest.v1+json
  Platform:    linux/s390x

  Name:        docker.io/kserve/llmisvc-controller:v0.20.0@sha256:1a38319dea7cee5ee5dee08192261cc0dde56af6d694155363b8059407259a2a
  MediaType:   application/vnd.oci.image.manifest.v1+json
  Platform:    unknown/unknown
  Annotations:
    vnd.docker.reference.digest: sha256:4bf78942d5009b2684decfe68d8f1c904b4a0f41711ec750869f16df0fd7ef29
    vnd.docker.reference.type:   attestation-manifest

  Name:        docker.io/kserve/llmisvc-controller:v0.20.0@sha256:1cb484a64e3299f93ec131420198b306838f564750b5c482d3906c3af40023dd
  MediaType:   application/vnd.oci.image.manifest.v1+json
  Platform:    unknown/unknown
  Annotations:
    vnd.docker.reference.digest: sha256:be6453e834ba2fe6d797395c8e43ea42f011694b0d88ac2870075e94327d1222
    vnd.docker.reference.type:   attestation-manifest

  Name:        docker.io/kserve/llmisvc-controller:v0.20.0@sha256:9183b01ba342ffbcc15c67abfed6d163ebedf1aa02ec500f6db51a5c5f768082
  MediaType:   application/vnd.oci.image.manifest.v1+json
  Platform:    unknown/unknown
  Annotations:
    vnd.docker.reference.type:   attestation-manifest
    vnd.docker.reference.digest: sha256:e0963c6adc62593ada575cfb8224127ee50d335dd469f24be1093bbf68ab7cbb

  Name:        docker.io/kserve/llmisvc-controller:v0.20.0@sha256:db621d21a6f8587a951b28ade6a7bd231d8c8d62b51c2a85607391fe3d9ee91b
  MediaType:   application/vnd.oci.image.manifest.v1+json
  Platform:    unknown/unknown
  Annotations:
    vnd.docker.reference.digest: sha256:ff7e02dc8f4e96eaf24371794225df0140d4309dfc7f6b498cbd9663e9c26b9e
    vnd.docker.reference.type:   attestation-manifest

  Name:        docker.io/kserve/llmisvc-controller:v0.20.0@sha256:6483d021538ad1a55dbdbbdbc7faaf911cf560ad7c5ed00723b418ea08cd261b
  MediaType:   application/vnd.oci.image.manifest.v1+json
  Platform:    unknown/unknown
  Annotations:
    vnd.docker.reference.digest: sha256:dcfa3ce26f74bdaf669173b41ec20cdc3048f31d66dc046eb7f4d3ae2449c79c
    vnd.docker.reference.type:   attestation-manifest