kubectl get pods JSONPATH failed to do a pattern match-CodePudding

I'm trying to retrieve pods using a JSONPATH query which matches the name with a certain pattern matching as specified below and I get the error as shown. Any reason what would be the reason for the failure.

kubectl get po -n sdfd -o jsonpath='{.items[?(@.metadata.generateName =~ /abc.*?/i)].status.podIP}'
error: error parsing jsonpath {.items[?(@.metadata.generateName =~ /abc.*?/i)].status.podIP}, unrecognized character in action: U 007E '~'

Please find the kubectl cli version as shown below :-

kubectl version                                                  
Client Version: version.Info{Major:"1", Minor:"19", GitVersion:"v1.19.0", GitCommit:"e19964183377d0ec2052d1f1fa930c4d7575bd50", GitTreeState:"clean", BuildDate:"2020-08-26T21:54:15Z", GoVersion:"go1.15", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"20", GitVersion:"v1.20.9", GitCommit:"454b5b515582f8ac8419435dc9c230fc97fb844b", GitTreeState:"clean", BuildDate:"2021-11-01T19:59:05Z", GoVersion:"go1.15.14", Compiler:"gc", Platform:"linux/amd64"}

CodePudding user response：

Regular expressions are not supported with jsonpath. Here's the github issue for this matter. You can use jq to process the output with regex.

CodePudding user response：

According to the documentation:

JSONPath regular expressions are not supported. If you want to match using regular expressions, you can use a tool such as jq.

Run the following command to achieve the desired result:

kubectl get pods -o json | jq -r '.items[] | select(.metadata.name | test("test-")).spec.containers[].image'

Refer to this Github issue and stackpost for more information.