记录kubernetv1.19安装过程

不念不忘少年蓝@ 2022-12-26 08:16 113阅读 0赞

如果是重新安装请先在所有节点上执行如下2步骤  
第1步删除/etc/kubernetes/文件夹下的所有文件、删除$HOME/.kube文件夹、删除/var/lib/etcd文件夹、并关闭防火墙  
rm -rf /etc/kubernetes/\*  
rm -rf ~/.kube/\*  
rm -rf /var/lib/etcd/\*  
systemctl stop firewalld   
swapoff -a

第2步重置节点  
kubeadm reset

开始安装  
1:运行kubeadm init时加上阿里云镜像的参数--image-repository=registry.aliyuncs.com/google\_containers，如下：（版本改为自己需要的）  
kubeadm init --image-repository=registry.aliyuncs.com/google\_containers --apiserver-advertise-address=192.168.226.128 --pod-network-cidr=10.244.0.0/16

2:生成的token：kubeadm join 10.24.149.226:6443 --token uov5pf.twqt5m343jbtc7m6 \\  
    --discovery-token-ca-cert-hash sha256:a04789e03850994066033a5789488967098853ca57db603cdc9644e786a402fb  
    kubeadm join 192.168.226.128:6443 --token x6oi7q.qwwrg7b50cfk9be2 \\  
    --discovery-token-ca-cert-hash sha256:c4666f96390f35b239c36720bba20bf3a64641559b43bb16b6b977066e0d03c9

3：kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml

4:配置kubenetes的flannel网络的时候，出现以下报错  
The connection to the server localhost:8080 was refused - did you specify the right host or port?  
解决方案： export KUBECONFIG=/etc/kubernetes/admin.conf

5：node2 加入集群：kubeadm join 10.24.149.226:6443 --token uov5pf.twqt5m343jbtc7m6 --discovery-token-ca-cert-hash sha256:a04789e03850994066033a5789488967098853ca57db603cdc9644e786a402fb

6：修改node2的role  
NAME   STATUS     ROLES    AGE     VERSION  
n1     Ready      master   4h53m   v1.19.4  
n2     Ready      <none>   146m    v1.19.4  
n4     NotReady   <none>   78s     v1.19.4  
kubectl label nodes <your\_node> kubernetes.io/role=<your\_new\_label>  
//例如  
kubectl label nodes n1 kubernetes.io/role=worker

修改后如下所示：  
\[root@n1 ~\]\# kubectl get nodes  
NAME   STATUS   ROLES    AGE    VERSION  
n1     Ready    master   5h     v1.19.4  
n2     Ready    worker   153m   v1.19.4  
n4     Ready    <none>   8m6s   v1.19.4

7：kubectl run nginx --image=nginx --replicas=2

8: kubectl create deployment nginx --image=nginx

9: kubectl get deployment

10: kubectl expose deployment nginx --port=80 --type=LoadBalancer

11: kubectl describe service nginx

kubectl scale deploy/nginx-deployment --replicas=5

12：为节点2打标签  
kubectl label node n2 type=nginx  
   查看label  
kubectl describe node n2

13：在当前目录下创建nginx-deployment.yaml  
apiVersion: apps/v1  
kind: Deployment  
metadata:  
  labels:  
    app: nginx  
  name: nginx-deployment  
spec:  
  replicas: 2  
  selector:  
    matchLabels:  
      app: nginx  
  template:  
    metadata:  
      labels:  
        app: nginx  
    spec:  
      containers:  
      - image: nginx:1.14.0  
        name: nginx  
      nodeSelector:  
        type: nginx  
      tolerations:  
      - key: "key"  
        operator: "Equal"  
        value: "nginx"  
        effect: "NoSchedule"  
查看deployment  
\[root@n1 ~\]\#kubectl get deployment   
NAME               READY   UP-TO-DATE   AVAILABLE   AGE  
nginx              1/1     1            1           28h  
nginx-dep          0/2     2            0           59s  
nginx-deployment   2/2     2            2           10h  
\[root@n1 ~\]\# kubectl get deployment nginx-dep -o wide  
NAME        READY   UP-TO-DATE   AVAILABLE   AGE   CONTAINERS   IMAGES        SELECTOR  
nginx-dep   0/2     2            0           65s   nginx        nginx:1.7.9   app=nginx  
\[root@n1 ~\]\#kubectl get replicaset -o wide  
NAME                         DESIRED   CURRENT   READY   AGE     CONTAINERS   IMAGES         SELECTOR  
nginx-6799fc88d8             1         1         1       29h     nginx        nginx          app=nginx,pod-template-hash=6799fc88d8  
nginx-dep-5d59d67564         2         2         1       3m18s   nginx        nginx:1.7.9    app=nginx,pod-template-hash=5d59d67564  
nginx-deployment-6b4bc4f67   2         2         2       10h     nginx        nginx:1.14.0   app=nginx,pod-template-hash=6b4bc4f67  
\[root@n1 ~\]\# kubectl get pod  
NAME                               READY   STATUS    RESTARTS   AGE  
nginx-6799fc88d8-sqvg6             1/1     Running   1          29h  
nginx-dep-5d59d67564-lc5t2         1/1     Running   0          4m56s  
nginx-dep-5d59d67564-lw26m         1/1     Running   0          4m56s  
nginx-deployment-6b4bc4f67-sh759   1/1     Running   0          10h  
nginx-deployment-6b4bc4f67-vbxxs   1/1     Running   0          10h

14：删除deployment  
    kubectl delete -f nginx-deployment.yaml  
15:myjob.yml  
apiVersion: batch/v1beta1   
kind: Job   
metadata:  
  name: myjob  
spec:  
  template:  
    metadata:  
      name: myjob  
    spec:  
      containers:  
      - name: hello  
        image: busybox  
        command: \["echo", "hello k8s job!"\]  
      restartPolicy: Never  
16:创建service，kubectl apply -f nginx-svc.yaml，其中nginx-svc.yaml如下：  
apiVersion: v1  
kind: Service  
metadata:  
  nginx-svc  
spec:  
  selector:  
    app: nginx  
  ports:  
    protocol: TCP  
    port: 8080  
    targetPort: 80      
17：查看具体service  
kubectl describe svc nginx-service

18: 回滚  
\[root@n1 ~\]\# kubectl apply -f  nginx-2.yml --record  
deployment.apps/nginx-dep configured  
spec:  
      containers:  
      - name: nginx  
        image: nginx:1.7.11  
        ports:  
        - containerPort: 80

\[root@n1 ~\]\# kubectl apply -f  nginx-3.yml --record  
deployment.apps/nginx-dep configured  
spec:  
      containers:  
      - name: nginx  
        image: nginx:1.7.12  
        ports:  
        - containerPort: 80

查看历史版本  
kubectl   rollout  history deployment  nginx-dep  
\[root@n1 ~\]\# kubectl rollout history deployment nginx-dep   
deployment.apps/nginx-dep   
REVISION  CHANGE-CAUSE  
1         <none>  
2         <none>  
3         kubectl apply --filename=nginx-2.yml --record=true  
4         kubectl apply --filename=nginx-3.yml --record=true  
回滚版本  
kubectl rollout undo deployment nginx-dep --to-revision=3  
\[root@n1 ~\]\# kubectl rollout undo deployment nginx-dep --to-revision=3  
deployment.apps/nginx-dep rolled back  
\[root@n1 ~\]\# kubectl rollout undo deployment nginx-dep --to-revision=3  
deployment.apps/nginx-dep rolled back  
kubectl rollout history deployment nginx-dep  
        
HELM  
1：安装  
curl -fsSL -o get\_helm.sh https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3  
curl https://raw.githubusercontent.com/kubernetes/helm/master/scripts/get | bash        
2:chmod 777 get\_helm.sh  
3:./get\_helm.sh

故障问题：  
1:node 出现 noready  
解决方案：  
    systemctl daemon-reload  
    systemctl restart kubelet