How to find out whether a pod belongs to statefulset/deployment/replica-set

[Cherishty]

how can I use kubenetes client-sdk to figure out whether a pod belongs to statefulset/deployment/replica-set?

the same issue as this, but that method does not work, also kubectl describe pod is not the same as kubectl get pods

What I can find is, for a pod belong to a high-level controller, it will have metadata.generateName and metadata.ownerReferences. Unfortunately, it is not supported via Field Selectors.

So how can I filter it out?

[Cherishty]

/sig API-Machinery

[zq-david-wang]

I would use selector(pod's label) to retrieve all relevant replica set(kind field from pod's owner reference), and then use owner reference to further narrow it down

[yue9944882]

kubernetes/staging/src/k8s.io/apimachinery/pkg/apis/meta/v1/types.go

Lines 315 to 319 in 1c10061

	// API version of the referent.
	APIVersion string `json:"apiVersion" protobuf:"bytes,5,opt,name=apiVersion"`
	// Kind of the referent.
	// More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#types-kinds
	Kind string `json:"kind" protobuf:"bytes,1,opt,name=kind"`

the in-tree fields from metadata.ownerReferences will help

[Cherishty]

kubernetes/staging/src/k8s.io/apimachinery/pkg/apis/meta/v1/types.go

Lines 315 to 319 in 1c10061

	// API version of the referent.
	APIVersion string `json:"apiVersion" protobuf:"bytes,5,opt,name=apiVersion"`
	// Kind of the referent.
	// More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#types-kinds
	Kind string `json:"kind" protobuf:"bytes,1,opt,name=kind"`

the in-tree fields from metadata.ownerReferences will help

Yes, this is what I described in last post, but how can I filter it via k8s pysdk, or only have to list all pod and resolve it by myself?

[yue9944882]

or only have to list all pod and resolve it by myself?

sadly, yes. the good news is that we can do pagination so that list chunks won't jam the traffic.

[YoubingLi]

Pod has UID attribute.

If the pod belongs to other object such as Job, Deployment, statefulset, the "controller-uid" is set in Pod's Labels.

You can compare these 2 fields.

func getPodControlID(pod *corev1.Pod) string {

    if pod.Labels == nil {
            return string(pod.UID)
    } else {
            uuid, ok := pod.Labels["controller-uid"]
            if ok { 
                    return uuid
            } else {
                    return string(pod.UID)
            }
    }

}

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[k8s-ci-robot]

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