Killer Shell CKA - Apiserver Misconfigured

1 개요

Killer Shell CKA - Apiserver Misconfigured

• API 서버 설정에 잘못된 점이 있어 API 서버가 정상적으로 동작하지 않는 상황을 해결하는 실습

controlplane:~$ kubectl get pods -A
The connection to the server 172.30.1.2:6443 was refused - did you specify the right host or port?

controlplane:~$ crictl ps
CONTAINER           IMAGE               CREATED             STATE               NAME                      ATTEMPT             POD ID              POD                                       NAMESPACE
5272b8b2d3244       cfed1ff748928       4 minutes ago       Running             kube-scheduler            2                   3d56d63b384e3       kube-scheduler-controlplane               kube-system
631e616327f82       ff4f56c76b82d       4 minutes ago       Running             kube-controller-manager   2                   c1c72e2effc4c       kube-controller-manager-controlplane      kube-system
4ea9b111dfae2       3461b62f768ea       50 minutes ago      Running             local-path-provisioner    1                   842db28f0bc13       local-path-provisioner-5c94487ccb-gmwjg   local-path-storage
339d6a440984b       1cf5f116067c6       50 minutes ago      Running             coredns                   1                   e0aa3be507847       coredns-6ff97d97f9-85m5c                  kube-system
7fd9984d0e4f9       1cf5f116067c6       50 minutes ago      Running             coredns                   1                   50d62e6e2ba4b       coredns-6ff97d97f9-2rxsf                  kube-system
29a549c938673       e6ea68648f0cd       50 minutes ago      Running             kube-flannel              1                   b6448e92c3d42       canal-rtfc5                               kube-system
584c06c79a88b       75392e3500e36       50 minutes ago      Running             calico-node               1                   b6448e92c3d42       canal-rtfc5                               kube-system
2e9b6487dc965       661d404f36f01       50 minutes ago      Running             kube-proxy                1                   182fb5a2d60d1       kube-proxy-7kdz8                          kube-system
9307ade8ecca8       499038711c081       51 minutes ago      Running             etcd                      1                   e7f24efc83004       etcd-controlplane                         kube-system
<syntaxhighlight lang='console'>
controlplane:~$ cat /var/log/syslog | grep kube-apiserver
...
2025-09-18T19:20:55.931703+00:00 controlplane kubelet[1560]: E0918 19:20:55.931655    1560 mirror_client.go:138] "Failed deleting a mirror pod" err="Delete \"https://172.30.1.2:6443/api/v1/namespaces/kube-system/pods/kube-apiserver-controlplane\": dial tcp 172.30.1.2:6443: connect: connection refused" pod="kube-system/kube-apiserver-controlplane"
2025-09-18T19:20:57.930515+00:00 controlplane kubelet[1560]: E0918 19:20:57.930158    1560 mirror_client.go:138] "Failed deleting a mirror pod" err="Delete \"https://172.30.1.2:6443/api/v1/namespaces/kube-system/pods/kube-apiserver-controlplane\": dial tcp 172.30.1.2:6443: connect: connection refused" pod="kube-system/kube-apiserver-controlplane"

2 참고

• https://killercoda.com/killer-shell-cka/scenario/apiserver-misconfigured