List All Container Images Running in a Cluster

[BahmaniAlireza]

Hi,

I've tested this example :

      kubectl get pods --all-namespaces -o jsonpath="{..image}" |\
      tr -s '[[:space:]]' '\n' |\
      sort |\
      uniq -c

It returns image names double, because "{..image}" recursively search in the output of JSON, So at the first, it will find the "image" word in "spec.containers.image" and at the second time, it will find the "image" word in "containerStatuses.image".
It means you will see the image name two times for each pod at least.

Please change your example.

Best Regards,
Alireza Bahmani.

[k8s-ci-robot]

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[sftim]

Hi @BahmaniAlireza

What's the URL of the page where you've seen a problem?

[Priyankasaggu11929]

@sftim @BahmaniAlireza,

here are the links to the:

• kubernetes docs website page ~ https://kubernetes.io/docs/tasks/access-application-cluster/list-all-running-container-images/
• markdown file(s) where it require changes ~ https://github.com/kubernetes/website/search?q=jsonpath%3D%22%7B..image%7D

[Priyankasaggu11929]

The issue is, the following command produces 2 times (the count of image in a single pod).

As @BahmaniAlireza mentioned, it is because the command count both the occurrence from the spec & status sections from a single pod json manifest.

❯ kubectl get pods --all-namespaces -o jsonpath="{..image}" |tr -s '[[:space:]]' '\n' |sort |uniq -c
      6 quay.io/app-sre/deployment-validation-operator:latest
      2 quay.io/openshift-release-dev/ocp-release@sha256:c7e8f18e8116356701bd23ae3a23fb9892dd5ea66c8300662ef30563d7104f39
      8 quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:02cbb763ee20ba10a2eb54cc18e6cc5848b69ac991fd9b5a513d0c8a8ecdae91
      6 quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:03cd77cc134a7bfcaa14c111b76234749b9b8cb0986ab25e2fb2afeb0ba7fb6b
      4 quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:055d8e5c8a106134bf725bdd542e544285b5cd10a5e1c7e02d527c50f81ef0f5
      2 quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:06633a70761c391052f3f5e482731a8fbbcf70df6aa082b8de916e04d0101f98
     10 quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:249b4e56b532da7bf19c91ec620694d708743712dc028d9466fc236a5adcc54d

Ideally it should be:

❯ kubectl get pods --all-namespaces -o jsonpath="{..image}" |tr -s '[[:space:]]' '\n' |sort |uniq -c
      3 quay.io/app-sre/deployment-validation-operator:latest
      1 quay.io/openshift-release-dev/ocp-release@sha256:c7e8f18e8116356701bd23ae3a23fb9892dd5ea66c8300662ef30563d7104f39
      4 quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:02cbb763ee20ba10a2eb54cc18e6cc5848b69ac991fd9b5a513d0c8a8ecdae91
      3 quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:03cd77cc134a7bfcaa14c111b76234749b9b8cb0986ab25e2fb2afeb0ba7fb6b
      2 quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:055d8e5c8a106134bf725bdd542e544285b5cd10a5e1c7e02d527c50f81ef0f5
      1 quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:06633a70761c391052f3f5e482731a8fbbcf70df6aa082b8de916e04d0101f98
     5 quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:249b4e56b532da7bf19c91ec620694d708743712dc028d9466fc236a5adcc54d

[Priyankasaggu11929]

Following could be one of the fix for it:

      kubectl get pods --all-namespaces -o jsonpath="{.items[*].spec.containers[*].image}"  |\
      tr -s '[[:space:]]' '\n' |\
      sort |\
      uniq -c

[ms-choudhary]

/assign

[ms-choudhary]

@Priyankasaggu11929 There are other references as well. These would return duplicate images as well, right? I've updated those as well for now.

kubectl get pods --namespace kube-system -o jsonpath="{..image}"

[Priyankasaggu11929]

Hi @ms-choudhary,

yes, I feel those also need to be fixed. Let's wait for @sftim to provide their review. :)