kubernetes - kube-apiserver 如何重启？

Question

我今天重新启动了我的系统。之后，我的主系统和 Web 浏览器未连接以查找 kubernetes GUI。
当我运行命令时 systemctl status kube-apiserver.service ,
它给出如下所示的输出:

kube-apiserver.service
  Loaded: not-found (Reason: No such file or directory)
  Active: inactive (dead)

怎么可以api-server重新启动？

Answer 1

您是否下载并安装了Kubernetes Controller Binaries直接地？
1) 如果是这样 , 检查 kube-apiserver.service systemd 单元文件存在:

cat /etc/systemd/system/kube-apiserver.service

2) 如果不是 ，你可能用 kubeadm 安装了 K8S .
通过此设置，kubeapi-server 作为 Pod 在主节点上运行 :

kubectl get pods -n kube-system
NAME                                       READY   STATUS    
coredns-f9fd979d6-jsn6w                    1/1     Running  ..
coredns-f9fd979d6-tv5j6                    1/1     Running  ..
etcd-master-k8s                            1/1     Running  ..
kube-apiserver-master-k8s                  1/1     Running  .. #<--- Here
kube-controller-manager-master-k8s         1/1     Running  ..
kube-proxy-5kzbc                           1/1     Running  ..
kube-scheduler-master-k8s                  1/1     Running  ..

而不是作为系统服务。
因此，由于您无法在 K8S 中重新启动 Pod，因此您必须将其删除:

kubectl delete pod/kube-apiserver-master-k8s -n kube-system

并且会立即创建一个新的 pod。

(*) 当您运行时 kubeadm init您应该会看到为控制平面创建 list static Pods :

.
. 
[control-plane] Using manifest folder "/etc/kubernetes/manifests"
[control-plane] Creating static Pod manifest for "kube-apiserver"
[control-plane] Creating static Pod manifest for "kube-controller-manager"
[control-plane] Creating static Pod manifest for "kube-scheduler"
[etcd] Creating static Pod manifest for local etcd in "/etc/kubernetes/manifests"
.
.

对应的yaml:

ubuntu@master-k8s:/etc/kubernetes/manifests$ ls -la
total 24
drwxr-xr-x 2 root root 4096 Oct 14 00:13 .
drwxr-xr-x 4 root root 4096 Sep 29 02:30 ..
-rw------- 1 root root 2099 Sep 29 02:30 etcd.yaml
-rw------- 1 root root 3863 Oct 14 00:13 kube-apiserver.yaml <----- Here
-rw------- 1 root root 3496 Sep 29 02:30 kube-controller-manager.yaml
-rw------- 1 root root 1384 Sep 29 02:30 kube-scheduler.yaml

以及 kube-apiserver 规范:

apiVersion: v1
kind: Pod
metadata:
  annotations:
    kubeadm.kubernetes.io/kube-apiserver.advertise-address.endpoint: 10.100.102.5:6443
  creationTimestamp: null
  labels:
    component: kube-apiserver
    tier: control-plane
  name: kube-apiserver
  namespace: kube-system
spec:
  containers:
  - command:
    - kube-apiserver
    - --advertise-address=10.100.102.5
    - --allow-privileged=true
    - --authorization-mode=Node,RBAC
    - --client-ca-file=/etc/kubernetes/pki/ca.crt
    - --enable-admission-plugins=NodeRestriction
    - --enable-bootstrap-token-auth=true
    .
    .
    .