inst@k8s-master:~$ kubectl get pods -n kube-system
NAME READY STATUS RESTARTS AGE
calico-kube-controllers-674fff74c8-g9dkn 1/1 Running 1 (31s ago) 64s
calico-node-9rpjc 0/1 Running 0 64s
calico-node-gfwsb 0/1 Running 0 64s
calico-node-rp584 0/1 Running 0 64s
coredns-5d78c9869d-dhft7 1/1 Running 2 (25s ago) 19m
coredns-5d78c9869d-ggjb4 1/1 Running 2 (25s ago) 19m
etcd-k8s-master 1/1 Running 10 (5m52s ago) 18m
kube-apiserver-k8s-master 1/1 Running 11 (5m23s ago) 19m
kube-controller-manager-k8s-master 1/1 Running 16 (3m21s ago) 18m
kube-proxy-btm5h 0/1 CrashLoopBackOff 5 (40s ago) 15m
kube-proxy-clm69 1/1 Running 2 (32s ago) 2m1s
kube-proxy-mnv87 1/1 Running 15 (102s ago) 19m
kube-scheduler-k8s-master 1/1 Running 13 (91s ago) 18m
inst@k8s-master:~$ kubectl get pods -n kube-system
The connection to the server 192.168.0.211:6443 was refused - did you specify the right host or port?
There are about 5-10 seconds between these two commands
So far I have tried restarting the server, reloading the Linux firewall and deleting and re-entering the ports on the firewall.
I have also set a DNS entry on my PiHole
but unfortunately all this did not help.
I hope that the situation of the cluster will stabilize.
The cluster was initialized with Kubeadm.
The Pod-Network (should work) works with Calico.
Linux firewall is UFW installed on every Node.
inst@k8s-master:~$ sudo ufw status
Status: active
To Action From
-- ------ ----
22/tcp ALLOW Anywhere
22 ALLOW Anywhere
10250/tcp ALLOW Anywhere
30000:32767/tcp ALLOW Anywhere
6443/tcp ALLOW Anywhere
2379/tcp ALLOW Anywhere
2380/tcp ALLOW Anywhere
10251/tcp ALLOW Anywhere
10252/tcp ALLOW Anywhere
10255/tcp ALLOW Anywhere
179/tcp ALLOW Anywhere
4789/udp ALLOW Anywhere
51820/udp ALLOW Anywhere
51821/udp ALLOW Anywhere
22/tcp (v6) ALLOW Anywhere (v6)
22 (v6) ALLOW Anywhere (v6)
10250/tcp (v6) ALLOW Anywhere (v6)
30000:32767/tcp (v6) ALLOW Anywhere (v6)
6443/tcp (v6) ALLOW Anywhere (v6)
2379/tcp (v6) ALLOW Anywhere (v6)
2380/tcp (v6) ALLOW Anywhere (v6)
10251/tcp (v6) ALLOW Anywhere (v6)
10252/tcp (v6) ALLOW Anywhere (v6)
10255/tcp (v6) ALLOW Anywhere (v6)
179/tcp (v6) ALLOW Anywhere (v6)
4789/udp (v6) ALLOW Anywhere (v6)
51820/udp (v6) ALLOW Anywhere (v6)
51821/udp (v6) ALLOW Anywhere (v6)
when i restart kubelet it works temporarily
inst@k8s-master:~$ sudo systemctl restart kubelet
inst@k8s-master:~$ kubectl get nodes
NAME STATUS ROLES AGE VERSION
k8s-master Ready control-plane 50m v1.27.1
k8s-worker1 Ready <none> 45m v1.27.1
k8s-worker2 Ready <none> 32m v1.27.1
