cka2021-04月考试题目标准答案.docx

发布时间：2022-06-02 发布人：admin 分类：说明书资料大小：1.31M 资料格式：docx 举报版权申诉

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1 创建 pv: //切环境 kubectl config use-context hk8s //提升权限 sudo -i vi pv.yaml apiVersion: v1 kind: PersistentVolume metadata: name: app-config spec: capacity: storage: 2Gi accessModes: - ReadWriteMany hostPath: path: "/srv/app-config" kubectl apply -f pv.yaml 参考： https://kubernetes.io/docs/tasks/configure-pod-container/configure-pe rsistent-volume-storage/#create-a-persistentvolume

2,创建 PVC kubectl config use-context ok8s sudo -i vi pvc.yaml apiVersion: v1 kind: PersistentVolumeClaim metadata: name: pv-volume

spec: storageClassName: csi-hostpath-sc accessModes: - ReadWriteOnce resources: requests: storage: 10Mi kubectl apply -f pvc.yaml https://kubernetes.io/docs/tasks/configure-pod-container/configure-pe rsistent-volume-storage/#create-a-persistentvolumeclaim vi pod-pvc.yaml apiVersion: v1 kind: Pod metadata: name: web-server spec: volumes: - name: task-pv-storage persistentVolumeClaim: claimName: pv-volume containers: - name: nginx image: nginx ports: - containerPort: 80 name: "http-server" volumeMounts: - mountPath: "/usr/share/nginx/html" name: task-pv-storage kubectl apply -f pod-pvc.yaml https://kubernetes.io/docs/tasks/configure-pod-container/configure-pe rsistent-volume-storage/#create-a-pod 先查看 storageClass csi-hostpath-sc 的 kubectl get csi-hostpath-sc -o yaml apiVersion: storage.k8s.io/v1 kind: StorageClass metadata: name: gluster-vol-default provisioner: kubernetes.io/glusterfs parameters: resturl: "http://192.168.10.100:8080" restuser: ""

secretNamespace: "" secretName: "" allowVolumeExpansion: true 有这个属性 allowVolumeExpansion: true 既可修改该属性没有该属性的话需要修改 kubectl edit storageClass csi-hostpath-sc 加上这个属性即可 kubectl patch pvc pv-volume -p '{"spec":{"resources":{"requests":{"storage":"70Mi"}}}}' --record 3，设置并调度 node kubectl config use-context ek8s sudo -i kubectl cordon ek8s-node-1 https://kubernetes.io/zh/docs/concepts/architecture/nodes/#manual-nod e-administration kubectl drain ek8s-node-1 --delete-local-data --ignore-daemonsets --force https://kubernetes.io/zh/docs/tasks/administer-cluster/safely-drain-n ode/#use-kubectl-drain-to-remove-a-node-from-service

4 RBAC kubectl config use-context k8s sudo -i kubectl create ServiceAccount cicd-token -n app-team1 命令行： kubectl create clusterrole deployment-clusterrole --verb=create --resource=Deployment,StatefulSet,DaemonSet kubectl create rolebinding cicd-rolebinding --clusterrole=deployment-clusterrole --serviceaccount=app-team1:cicd-token

5.k8smaster1.20.0 升级到 1.20.1 kubectl config use-context kubectl get nodes 找到 master 节点的名字并远程过去操作： ssh mk8s-master-0 sudo -i kubectl cordon mk8s-master-0 kubectl drain mk8s-master-0 apt-get update apt-get install -y kubeadm=1.20.1-00 --ignore-daemonsets

//查看升级计划 kubeadm upgrade plan //升级 kubeadm kubeadm update apply v1.20.1 --etcd-upgrade=false kubeadm rollout undo deployment coredns -n kube-system //升级 kubelet apt-get install -y kubelet=1.20.1-00 kubectl=1.20.1-00 systemctl daemon-reload systemctl restart kubelet #升级完之后需要解除 master 节点不可调度的标记 kubectl uncordon mk8s-master-0 https://kubernetes.io/docs/tasks/administer-cluster/kubeadm/kubeadm-u pgrade/

6 etdcd 备份备份： ETCDCTL_API=3 etcdctl --end-points=127.0.0.1:2379 --cacert=/opt/KUIN00601/ca.crt --cert=/opt/KUIN00601/etcd-client.crt --key=/opt/KUIN00601/etcd-client.key snapshot save /var/lib/backup/etcd-backup-snapshot-previous.db

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