[HELP] Local registry cannot be refered to by name outside of k3d cluster

[nwithers-ecr]

What did you do

• How was the cluster created?

  • k3d cluster create mycluster --registry-create mycluster-registry

• What did you do afterwards?

docker ps -f name=mycluster-registry
docker pull alpine:latest
docker tag alpine:latest mycluster-registry:12345/testimage:local
docker push mycluster-registry:12345/testimage:local
> Get https://mycluster-registry:12345/v2/: dial tcp: lookup mycluster-registry on 8.8.4.4:53: no such host
docker tag alpine:latest localhost:12345/testimage:local
docker push localhost:12345/testimage:local
kubectl run --image localhost:12345/testimage:local testimage --command -- tail -f /dev/null
kubectl get pod
> testimage   0/1     ErrImagePull   0          2s
kubectl delete pod testimage
kubectl run --image mycluster-registry:12345/testimage:local testimage --command -- tail -f /dev/null
kubectl get pod
> testimage   1/1     Running   0          3s

What did you expect to happen

I expected to be able to tag the image with the registry name, but instead had to use localhost

Screenshots or terminal output

docker push mycluster-registry:12345/testimage:local
> Get https://mycluster-registry:12345/v2/: dial tcp: lookup mycluster-registry on 8.8.4.4:53: no such host

Which OS & Architecture

Linux DaringLion 5.4.0-90-generic #101-Ubuntu SMP Fri Oct 15 20:00:55 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

Which version of k3d

k3d version v5.1.0
k3s version v1.21.5-k3s2 (default)

Which version of docker

docker version

Client:
 Version:           20.10.7
 API version:       1.41
 Go version:        go1.13.8
 Git commit:        20.10.7-0ubuntu5~20.04.2
 Built:             Mon Nov  1 00:34:17 2021
 OS/Arch:           linux/amd64
 Context:           default
 Experimental:      true

Server:
 Engine:
  Version:          20.10.7
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.13.8
  Git commit:       20.10.7-0ubuntu5~20.04.2
  Built:            Fri Oct 22 00:45:53 2021
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.5.5-0ubuntu3~20.04.1
  GitCommit:
 runc:
  Version:          1.0.1-0ubuntu2~20.04.1
  GitCommit:
 docker-init:
  Version:          0.19.0
  GitCommit:

docker info

Client:
 Context:    default
 Debug Mode: false

Server:
 Containers: 15
  Running: 7
  Paused: 0
  Stopped: 8
 Images: 942
 Server Version: 20.10.7
 Storage Driver: overlay2
  Backing Filesystem: extfs
  Supports d_type: true
  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 logentries splunk syslog
 Swarm: inactive
 Runtimes: io.containerd.runc.v2 io.containerd.runtime.v1.linux runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: 
 runc version: 
 init version: 
 Security Options:
  apparmor
  seccomp
   Profile: default
 Kernel Version: 5.4.0-90-generic
 Operating System: Ubuntu 20.04.3 LTS
 OSType: linux
 Architecture: x86_64
 CPUs: 8
 Total Memory: 62.67GiB
 Name: DaringLion
 ID: N2MD:XACX:AT4A:ADPS:PHN6:6CUS:YR6H:VOWC:SN6M:YZT4:U6EW:X6AP
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Username: nwithers
 Registry: https://index.docker.io/v1/
 Labels:
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Live Restore Enabled: false

[heesuk-ahn]

I have same issue, thanks your report :)

[iwilltry42]

Hi @nwithers-ecr , thanks for opening this issue!
This is explained in the docs over here: https://k3d.io/v5.1.0/usage/registries/#preface-referencing-local-registries
If you have any other issue with it, feel free to reopen 👍

Note: the special Preface section was just added recently, as before this section was in an info box a bit further down on that page, so now it's more prominent 👍

[nwithers-ecr]

@iwilltry42 thanks for pointing that out. I knew I must have missed something. After updating /etc/hosts it worked correctly.