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kubernetesjqmetrics

How to output only necessary information in jq request

I'm writing this jq request to output info about cpu:

cat kubernetes.txt | jq 'fromjson.kubernetes.pod | .name, .cpu.usage.nanocores'

My output is:

"podname"
null
"podname1"
null
"podname2"
null
"podname3"
3345678
"podname3"
123456

How to output only strings with values

Solution

  • You can leverage the select function for this:

    cat kubernetes.txt | jq 'fromjson.kubernetes.pod | select(.cpu.usage.nanocores != null) | .name, .cpu.usage.nanocores'

    https://stedolan.github.io/jq/manual/#Builtinoperatorsandfunctions