I am learning to work with Kubernetes and trying to configure monitoring of my Kubernetes cluster. For this I use metricbeat and elk. After deploying and configuring metricbeat, I get an error:
error making http request: Get http://172.16.0.205:10255/stats/summary: dial tcp 172.16.0.205:10255: connect: connection refusedI found that my Kubelet is not listening on port 10255:
[root@kube2 /]# netstat -ap | grep -i "listen" | grep "kubelet"
tcp 0 0 localhost:40450 0.0.0.0:* LISTEN 8560/kubelet
tcp 0 0 localhost:10248 0.0.0.0:* LISTEN 8560/kubelet
tcp6 0 0 [::]:10250 [::]:* LISTEN 8560/kubelet How can I enable this port. I found information that I need to use the parameter --read-only-port = 10255, but how do I apply it to my kubelet, I do not quite understand. For example:
[root@kube2 /]# kubelet --config --read-only-port=10255
\F1010 13:32:48.592306 15851 server.go:196] failed to load Kubelet config file --read-only-port=10255, error failed to read kubelet config file "/--read-only-port=10255", error: open /--read-only-port=10255: no such file or directoryIt's does't work. Which file does it need?
Can anyone help me with a solution to this problem?
I resolved this issue. I added flags in /var/lib/kubelet/kubelet-flags in every my kubertenes' nodes:
KUBELET_KUBEADM_ARGS="--cgroup-driver=systemd --network-plugin=cni --pod-infra-container-image=k8s.gcr.io/pause:3.1 --read-only-port=10255"and restart kubelet service.
Now I have open port 10255:
[root@kube2 7.1]# netstat -ap | grep -i "listen" | grep "kubelet"
tcp 0 0 localhost:44799 0.0.0.0:* LISTEN 6281/kubelet
tcp 0 0 localhost:10248 0.0.0.0:* LISTEN 6281/kubelet
tcp6 0 0 [::]:10250 [::]:* LISTEN 6281/kubelet
tcp6 0 0 [::]:10255 [::]:* LISTEN 6281/kubelet And I see some logs of kubernetes in my kibana.