rancher 重置未果，集群节点反而全被删

实现步骤

记录下安装 rancher 过程的一个悲剧

痛心: rancher 重置未果，集群节点反而全被删！

实现步骤

安装 rancher

版本： 2.6.2
```
kubectl apply -f rancher.yaml
```

清理 rancher

为啥要清理，因为我想把https去掉，想重来。。。。

 # 删除rancher
 kubectl delete -f rancher.yaml
 # 删除ns
 kubectl delete ns p-qxl8j p-vdwl2 local fleet-default  fleet-local cattle-fleet-local-system cattle-fleet-system cattle-global-data  cattle-global-nt  cattle-impersonation-system cattle-system cattle-fleet-clusters-system  cluster-fleet-local-local-1a3d67d0a899
    
 # 这里要等很久，且删不掉，ns处于tem, 用下列命令强制删除
 for ns in p-qxl8j p-vdwl2 local fleet-default  fleet-local cattle-fleet-local-system cattle-fleet-system cattle-global-data  cattle-global-nt  cattle-impersonation-system cattle-system cattle-fleet-clusters-system  cluster-fleet-local-local-1a3d67d0a899
 do
 kubectl get namespace "${ns}" -o json \
             | tr -d "\n" | sed "s/\"finalizers\": \[[^]]\+\]/\"finalizers\": []/" \
             | kubectl replace --raw /api/v1/namespaces/${ns}/finalize -f -
 done
    
 # 这里因为有webhook验证，所以需要删除。PS: 不知道是不是官方故意放置，防止后续的删除操作。
 kubectl delete mutatingwebhookconfigurations mutating-webhook-configuration rancher.cattle.io
 kubectl delete validatingwebhookconfigurations validating-webhook-configuration rancher.cattle.io

重新安装 rancher

罪恶的操作来了。

kubectl apply -f rancher.yaml

到这里，rancher 会输出下列日志，然后节点就被删除了。

2021/11/17 14:11:07 [INFO] Waiting for initial data to be populated
2021/11/17 14:11:09 [INFO] Waiting for initial data to be populated
2021/11/17 14:11:11 [INFO] Waiting for initial data to be populated

集群事件

集群所有节点全被删除。

0s          Normal   RemovingNode                node/k8s-worker-node2   Node k8s-worker-node2 event: Removing Node k8s-worker-node2 from Controller
0s          Normal   RemovingNode                node/k8s-master-node1   Node k8s-master-node1 event: Removing Node k8s-master-node1 from Controller
0s          Normal   RemovingNode                node/k8s-worker-node1   Node k8s-worker-node1 event: Removing Node k8s-worker-node1 from Controller

恢复集群

背锅吧，少年。

重启所有节点服务器就行。

生成的 rancher.yaml

 ./helm repo add rancher-stable https://releases.rancher.com/server-charts/stable  
 ./helm fetch --untar --untardir . 'rancher-stable/rancher'
 ./helm template --output-dir './yamls2' './rancher/'  --set tls=external --set postDelete.enabled=false

 # Source: rancher/templates/serviceAccount.yaml
 kind: ServiceAccount
 apiVersion: v1
 metadata:
   name: rancher
   namespace: ops
   labels:
     app: rancher
     chart: rancher-2.6.2
     heritage: Helm
 ---
 # Source: rancher/templates/clusterRoleBinding.yaml
 kind: ClusterRoleBinding
 apiVersion: rbac.authorization.k8s.io/v1
 metadata:
   name: rancher
   namespace: ops
   labels:
     app: rancher
     chart: rancher-2.6.2
     heritage: Helm
 subjects:
 - kind: ServiceAccount
   name: rancher
   namespace: ops
 roleRef:
   kind: ClusterRole
   name: cluster-admin
   apiGroup: rbac.authorization.k8s.io
 ---
 # Source: rancher/templates/secret.yaml
 apiVersion: v1
 kind: Secret
 metadata:
   name: "bootstrap-secret"
   namespace: ops
 type: Opaque
 data:
   bootstrapPassword: ""
    
 ---
 # Source: rancher/templates/deployment.yaml
 kind: Deployment
 apiVersion: apps/v1
 metadata:
   name: rancher
   namespace: ops
   annotations:
   labels:
     app: rancher
     chart: rancher-2.6.2
     heritage: Helm
 spec:
   replicas: 3
   selector:
     matchLabels:
       app: rancher
   strategy:
     rollingUpdate:
       maxSurge: 1
       maxUnavailable: 1
     type: RollingUpdate
   template:
     metadata:
       labels:
         app: rancher
     spec:
       serviceAccountName: rancher
       affinity:
         podAntiAffinity:
           preferredDuringSchedulingIgnoredDuringExecution:
           - weight: 100
             podAffinityTerm:
               labelSelector:
                 matchExpressions:
                 - key: app
                   operator: In
                   values:
                   - rancher
               topologyKey: kubernetes.io/hostname
         nodeAffinity:
           requiredDuringSchedulingIgnoredDuringExecution:
             nodeSelectorTerms: 
               - matchExpressions:
                 - key: kubernetes.io/os
                   operator: NotIn
                   values:
                   - windows
       tolerations: 
         - key: "cattle.io/os"
           value: "linux"
           effect: "NoSchedule"
           operator: "Equal"
       containers:
       - image: rancher/rancher:v2.6.2
         imagePullPolicy: IfNotPresent
         name: rancher
         ports:
         - containerPort: 80
           protocol: TCP
         args:
         # Public trusted CA - clear ca certs
         - "--no-cacerts"
         - "--http-listen-port=80"
         - "--https-listen-port=443"
         - "--add-local=true"
         env:
         - name: CATTLE_NAMESPACE
           value: ops
         - name: CATTLE_PEER_SERVICE
           value: rancher
         - name: CATTLE_BOOTSTRAP_PASSWORD
           valueFrom:
             secretKeyRef:
               name: "bootstrap-secret"
               key: "bootstrapPassword"
         livenessProbe:
           httpGet:
             path: /healthz
             port: 80
           initialDelaySeconds: 60
           periodSeconds: 30
         readinessProbe:
           httpGet:
             path: /healthz
             port: 80
           initialDelaySeconds: 5
           periodSeconds: 30
         resources:
           {}
         volumeMounts:
       volumes:
    
 ---
 # Source: rancher/templates/service.yaml
 apiVersion: v1
 kind: Service
 metadata:
   name: rancher
   namespace: ops
   labels:
     app: rancher
     chart: rancher-2.6.2
     heritage: Helm
 spec:
   ports:
   - port: 80
     targetPort: 80
     protocol: TCP
     name: http
   - port: 443
     targetPort: 444
     protocol: TCP
     name: https-internal
   selector:
     app: rancher
    
 ---
 # Source: rancher/templates/ingress.yaml
 apiVersion: networking.k8s.io/v1beta1
 kind: Ingress
 metadata:
   name: rancher
   namespace: ops
   labels:
     app: rancher
     chart: rancher-2.6.2
     heritage: Helm
   annotations:
     kubernetes.io/ingress.class: nginx
     nginx.ingress.kubernetes.io/ssl-redirect: "false" # turn off ssl redirect for external.
     nginx.ingress.kubernetes.io/proxy-connect-timeout: "30"
     nginx.ingress.kubernetes.io/proxy-read-timeout: "1800"
     nginx.ingress.kubernetes.io/proxy-send-timeout: "1800"
 spec:
   rules:
   - host: rancher.ops.putaoevent.com
     http:
       paths:
       - backend:
           serviceName: rancher
           servicePort: 80

rancher 重置未果，集群节点反而全被删

实现步骤

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