curl gives 403 error while trying to run exec command on kubenetes pod - kubernetes

Question

I m trying to execute the command inside the container using Kubernetes API. while the command work using kubectl
kubectl exec shell-demo -- bash -c env
but same gives 403 error when using Kubernetes web API(kubectl proxy) using curl.
$ curl -k -v POST http://192.168.1.44:5443/api/v1/namespaces/mynamespace/pods/shell-demo/exec?command=bash&command=-c&command=env&container=nginx&stderr=true&stdout=true
[1] 405247
[2] 405248
[3] 405249
[4] 405250
[5] 405251
[2] Done command=-c
[3] Done command=env
[4]- Done container=nginx
[farooq#farooq-pc ansible-vbox-vagrant-kubernetes]$ * Could not resolve host: POST
* Closing connection 0
curl: (6) Could not resolve host: POST
* Trying 192.168.1.44:5443...
* Connected to 192.168.1.44 (192.168.1.44) port 5443 (#1)
> GET /api/v1/namespaces/mynamespace/pods/shell-demo/exec?command=bash HTTP/1.1
> Host: 192.168.1.44:5443
> User-Agent: curl/7.79.1
> Accept: */*
>
* Mark bundle as not supporting multiuse
< HTTP/1.1 403 Forbidden
< Content-Type: text/plain; charset=utf-8
< X-Content-Type-Options: nosniff
< Date: Thu, 18 Nov 2021 19:54:34 GMT
< Content-Length: 10
<
Forbidden

Answer 1

Your curl command looks wrong. Try it with -X in front of the POST like this: curl -k -v -X POST http://192.168.1.44:5443/api/v1/namespaces/mynamespace/pods/shell-demo/exec?command=bash&command=-c&command=env&container=nginx&stderr=true&stdout=true
also make sure if you need POST at all, since you don't add any data (-d mypostbody) it could be a simple GET request with urlencoded-data depending on your API endpoint aswell.