Api sever logs

General Discussions
1

Hi there, i am trying to understand the internal communication in the cluster for example when creating a pod.
The verbose output of kubectl shows the http requests sent to the api-server, so i wanted to check what the api-server do, but the logs of the api-server are not showing anything related to the created pod.
I was hoping to find the logs of the communication with the etcd and scheduler for example.

Is there any logs for the communication between api-server and the control plane components ?

2

You can increase the verbosity of the api-server logs. It’s probably done via manifest file at /etc/kubernetes/manifests/kube-apiserver.yaml and restarting the kubelet, depending on your deployment method.

There’s some useful diagrams and information in this section of the documentation too:

3

Thanks @protosam! increasing he verbosity indeed showed more info, but didn’t show the requests sent by the api-server to the etcd. I already read this page in the documentation. I want though to check the requests sent from each of the control-plane to validate what’s written in the documentation. Probably till now the only way, is to dig down in to the source code.

4

In most cases the only thing that will be using etcd is Kubernetes. Perhaps modify the etcd flags.

If all else fails, you can always setup a proxy server in front of etcd to act as a man-in-the-middle to get the information you’re looking for.