kubectl create pod using override return error: Invalid JSON Patch

user_1591156 0
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I am trying to run my pod using below command but keep getting error:

error: Invalid JSON Patch

kubectl run -i tmp-pod --rm -n=my-scripts --image=placeholder --restart=Never --overrides= "$(cat pod.json)"

Here is my pod.json file:

{
    "apiVersion": "v1",
    "kind": "Pod",
    "metadata": {
        "name": "test",
        "namespace": "my-ns",
        "labels": {
            "app": "test"
        }
    },
    "spec": {
        "containers": [
            {
                "name": "test",
                "image": "myimage",
                "command": [
                    "python",
                    "/usr/bin/cma/excute.py"
                ]
            }
        ]
    }
}

What am I doing wrong here?

kubectl kubernetes-pod kubernetes json
1 Answers

I did a bit of testing and it seems there is an issue with Cmder not executing $() properly - either not working at all, or treating newlines as Enter, and thus executing a commant before entire JSON is passed.

You may want to try running your commands in PowerShell:

kubectl run -i tmp-pod --rm -n=my-scripts --image=placeholder --restart=Never --overrides=$(Get-Content pod.json -Raw)

There is a similar issue on GitHub [Windows] kubectl run not accepting valid JSON as --override on Windows (same JSON works on Mac) #519. Unfortunately, there is no clear solution for this.

Possible solutions are:

  • Passing JSON as a string directly 
    kubectl run -i tmp-pod --rm -n=my-scripts --image=placeholder --restart=Never --overrides='{"apiVersion":"v1","kind":"Pod","metadata":{...}}'
  • Using ' instead of " around overrides.
  • Using triple quotes """ instead of single quotes " in JSON file.
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