kubernetes to print specific columns

Question

Need only specific columns using JSONPATH query in kubernetes:

$ kubectl get node

NAME  STATUS    ROLES   AGE VERSION
1     Ready     master  35d v1.18.6
2     Ready     <none>  35d v1.18.6
3     Ready     <none>  35d v1.18.6             
4     Ready     <none>  35d v1.18.6             
5     Ready     master  35d v1.18.6             
6     Ready     <none>  35d v1.18.6

Desired output should look like this:

NAME    VERSION
1       v1.18.6
2       v1.18.6
3       v1.18.6
4       v1.18.6
5       v1.18.6 
6       v1.18.6

score 2 · Accepted Answer · edited Mar 25 '21 at 14:25

2

Th answer to above question is:

$ kubectl get node -o=jsonpath='{range.items[*]}{.metadata.selfLink} {"\t"} {.status.nodeInfo.kubeletVersion}{"\n"}{end}'

It will produce output:

01    v1.18.6
02    v1.18.6
03    v1.18.6
04    v1.18.6
05    v1.18.6

For further sorting:

$ kubectl get node -o=custom-columns=NODE:.metadata.selfLink
$ kubectl get node -o=custom-columns=VERSION:.status.nodeInfo.kubeletVersion

kubectl get node -o=custom-columns=NODE:.metadata.selfLink,VERSION:.status.nodeInfo.kubeletVersion N

edited Mar 25 '21 at 14:25

Andy K

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answered Sep 08 '20 at 19:14

raju

129
1
9

I think you have a typo here. If you are looking for name of the node you should use: `.metadata.name` instead of `.metadata.selfLink`. – Dawid Kruk Sep 09 '20 at 09:03
Not exactly .metadata.selfLink gives complete path --> """/api/v1/nodes/hostname01 v1.18.6""" Where as .metadata.name gives only host list --> """hostname01 v1.18.6""" – raju Feb 26 '21 at 17:05

kubernetes to print specific columns

1 Answers1