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kubernetes "selector" "ownerreferences"

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DreamCoder answered on August 25, 2022 Popularity 1/10 Helpfulness 1/10

answer kubernetes "selector" "ownerreferences"

related kubernetes "selector" "ownerreferences"

related kubectl kubernetes "selector" "ownerreferences"

kubernetes "selector" "ownerreferences"

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kubectl get pods -ojson | jq '.items[] | select(.status.containerStatuses[] | ((.ready|not) and .state.terminated.exitCode!=0)) | [{name: .metadata.name, statuses: .status.containerStatuses}]'

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Source: github.com

Tags: kubernetes shell

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Contributed on Aug 25 2022

DreamCoder

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kubernetes "selector" "ownerreferences"

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kubectl get pods -o jsonpath='{range .items[?(.metadata.ownerReferences.uid=262bab1a-1c79-11ea-8e23-42010a800016)]}{.metadata.name}{end}'

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Source: codehunter.cc

Tags: kubernetes shell

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Contributed on Aug 25 2022

DreamCoder

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kubectl kubernetes "selector" "ownerreferences"

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For example, I have a Pod like:

apiGroup: v1
kind: Pod
metadata:
  ownerReferences:
  - apiVersion: apps/v1
    blockOwnerDeletion: true
    controller: true
    kind: ReplicaSet
    name: grpc-ping-r7f8r-deployment-54d688d777
    uid: 262bab1a-1c79-11ea-8e23-42010a800016

Can I do something like:
kubectl get pods --field-selector 'metadata.ownerReferences.uid=262bab1a-1c79-11ea-8e23-42010a800016'

This command fails (field label not supported: metadata.ownerReferences.uid). I suspect the reason is that ownerReferences is an array field itself. I’ve also tried, but didn’t work:
metadata.ownerReferences[*].uid=
metadata.ownerReferences[].uid=
I might try client-go SDK for Kubernetes API, but I suspect it won’t work for the same reason.
Is there a server-side way to query by this? Thanks much.


The --field-selector only works with some limited fields.

Which contains:

"metadata.name",
"metadata.namespace",
"spec.nodeName",
"spec.restartPolicy",
"spec.schedulerName",
"spec.serviceAccountName",
"status.phase",
"status.podIP",
"status.podIPs",
"status.nominatedNodeName"


Reference
But you can perform the task by using jq. Here is a command that I used for listing all ready nodes. It demonstrates the use of array fields that you’re looking for.
kubectl get nodes -o json | jq -r '.items[] | select(.status.conditions[] | select(.type=="Ready" and .status=="True")) | .metadata.name '


I think what you really want to do is a filter rather than a query. By using JSONPath you can filter out content using ?().
For example the following would work:
kubectl get pods -o jsonpath='{range .items[?(.metadata.ownerReferences.uid=262bab1a-1c79-11ea-8e23-42010a800016)]}{.metadata.name}{end}']

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Source: codeutility.org

Tags: kubernetes whatever kubectl

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Contributed on Aug 25 2022

DreamCoder

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kubernetes "selector" "ownerreferences"

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