Image format of docker/whalesay is no longer supported by Docker breaking examples

[reub]

The venerable docker/whalesay image referenced in Chapter 2 nginx-pod.yaml uses an image format that is no longer supported by Docker as of the v27.0 release on July 1, 2024 which causes a failure to pull the image from the registry.

It may also be that other images in later examples are similarly affected but I have not verified this.

See: https://docs.docker.com/engine/deprecated/#pushing-and-pulling-with-image-manifest-v2-schema-1

Events:
  Type     Reason     Age                  From               Message
  ----     ------     ----                 ----               -------
  Normal   Scheduled  10m                  default-scheduler  Successfully assigned argocd/nginx to minikube
  Normal   Pulling    8m50s (x4 over 10m)  kubelet            Pulling image "docker/whalesay"
  Warning  Failed     8m48s (x4 over 10m)  kubelet            Failed to pull image "docker/whalesay": [DEPRECATION NOTICE] Docker Image Format v1 and Docker Image manifest version 2, schema 1 support is disabled by default and will be removed in an upcoming release. Suggest the author of docker.io/docker/whalesay:latest to upgrade the image to the OCI Format or Docker Image manifest v2, schema 2. More information at https://docs.docker.com/go/deprecated-image-specs/
  Warning  Failed     8m48s (x4 over 10m)  kubelet            Error: ErrImagePull
  Warning  Failed     8m23s (x6 over 10m)  kubelet            Error: ImagePullBackOff
  Normal   BackOff    8s (x42 over 10m)    kubelet            Back-off pulling image "docker/whalesay"

$ docker pull docker/whalesay
Using default tag: latest
latest: Pulling from docker/whalesay

What's next:
    View a summary of image vulnerabilities and recommendations → docker scout quickview docker/whalesay
[DEPRECATION NOTICE] Docker Image Format v1 and Docker Image manifest version 2, schema 1 support is disabled by default and will be removed in an upcoming release. Suggest the author of docker.io/docker/whalesay:latest to upgrade the image to the OCI Format or Docker Image manifest v2, schema 2. More information at https://docs.docker.com/go/deprecated-image-specs/
$ echo $?
1
$