• kubernetes（5） 续4

    目录

    volumes

    emptyDir卷

    hostpath卷

    nfs卷

    持久卷

    storageclass

    statefulset控制器

    mysql主从部署

    volumes

    emptyDir卷

    1. [root@k8s2 volumes]# vim emptydir.yaml
    2. apiVersion: v1
    3. kind: Pod
    4. metadata:
    5.   name: vol1
    6. spec:
    7.   containers:
    8.   - image: busyboxplus
    9.     name: vm1
    10.     command: ["sleep", "300"]
    11.     volumeMounts:
    12.     - mountPath: /cache
    13.       name: cache-volume
    14.   - name: vm2
    15.     image: nginx
    16.     volumeMounts:
    17.     - mountPath: /usr/share/nginx/html
    18.       name: cache-volume
    19.   volumes:
    20.   - name: cache-volume
    21.     emptyDir:
    22.       medium: Memory
    23.       sizeLimit: 100Mi

    1. [root@k8s2 volumes]# kubectl apply -f emptydir.yaml
    2. [root@k8s2 volumes]# kubectl get pod
    3. [root@k8s2 volumes]# kubectl exec vol1 -c vm1 -it -- sh
    4. / # cd /cache/
    5. /cache # ls
    6. /cache # curl  localhost
    7. /cache # echo www.westos.org > index.html
    8. /cache # curl  localhost
    9. /cache # dd if=/dev/zero of=bigfile bs=1M count=200
    10. /cache # du -h bigfile

    hostpath卷

    1. [root@k8s2 volumes]# vim hostpath.yaml
    2. apiVersion: v1
    3. kind: Pod
    4. metadata:
    5.   name: vol2
    6. spec:
    7.   nodeName: k8s4
    8.   containers:
    9.   - image: nginx
    10.     name: test-container
    11.     volumeMounts:
    12.     - mountPath: /usr/share/nginx/html
    13.       name: test-volume
    14.   volumes:
    15.   - name: test-volume
    16.     hostPath:
    17.       path: /data
    18.       type: DirectoryOrCreate

    1. [root@k8s2 volumes]# kubectl apply -f hostpath.yaml
    2. [root@k8s2 volumes]# kubectl get pod -o wide
    3. [root@k8s4 data]# echo www.westos.org > index.html
    4. [root@k8s2 volumes]# curl 10.244.106.140

    nfs卷

    配置nfsserver

    1. [root@k8s1 ~]# yum install -y nfs-utils
    2. [root@k8s1 ~]# vim /etc/exports
    3. /nfsdata        *(rw,sync,no_root_squash)
    4.  
    5. [root@k8s1 ~]# mkdir -m 777 /nfsdata
    6. [root@k8s1 ~]# systemctl  enable --now nfs
    7. [root@k8s1 ~]# showmount -e

    1. [root@k8s2 volumes]# vim nfs.yaml
    2. apiVersion: v1
    3. kind: Pod
    4. metadata:
    5.   name: nfs
    6. spec:
    7.   containers:
    8.   - image: nginx
    9.     name: test-container
    10.     volumeMounts:
    11.     - mountPath: /usr/share/nginx/html
    12.       name: test-volume
    13.   volumes:
    14.   - name: test-volume
    15.     nfs:
    16.       server: 192.168.81.10
    17.       path: /nfsdata

    需要在所有k8s节点上安装nfs-utils软件包

    yum install -y nfs-utils

    没有安装会有以下错误

    1. [root@k8s2 volumes]# kubectl apply -f nfs.yaml
    2. [root@k8s2 volumes]# kubectl get pod -o wide
    3.  
    4. 在nfsserver端创建测试页
    5. [root@k8s1 ~]# cd /nfsdata/
    6. [root@k8s1 nfsdata]# echo www.westos.org > index.html
    7.  
    8. [root@k8s2 volumes]# curl 10.244.106.141
    9. www.westos.org

    持久卷

    配置nfs输出目录

    1. [root@k8s1 ~]# cd /nfsdata/
    2. [root@k8s1 nfsdata]# mkdir pv1 pv2 pv3

    创建静态pv

    1. [root@k8s2 pv]# vim pv.yaml
    2. apiVersion: v1
    3. kind: PersistentVolume
    4. metadata:
    5.   name: pv1
    6. spec:
    7.   capacity:
    8.     storage: 5Gi
    9.   volumeMode: Filesystem
    10.   accessModes:
    11.     - ReadWriteOnce
    12.   persistentVolumeReclaimPolicy: Recycle
    13.   storageClassName: nfs
    14.   nfs:
    15.     path: /nfsdata/pv1
    16.     server: 192.168.81.10
    17.  
    18. ---
    19. apiVersion: v1
    20. kind: PersistentVolume
    21. metadata:
    22.   name: pv2
    23. spec:
    24.   capacity:
    25.     storage: 10Gi
    26.   volumeMode: Filesystem
    27.   accessModes:
    28.     - ReadWriteMany
    29.   persistentVolumeReclaimPolicy: Recycle
    30.   storageClassName: nfs
    31.   nfs:
    32.     path: /nfsdata/pv2
    33.     server: 192.168.81.10
    34.  
    35. ---
    36. apiVersion: v1
    37. kind: PersistentVolume
    38. metadata:
    39.   name: pv3
    40. spec:
    41.   capacity:
    42.     storage: 15Gi
    43.   volumeMode: Filesystem
    44.   accessModes:
    45.     - ReadOnlyMany
    46.   persistentVolumeReclaimPolicy: Recycle
    47.   storageClassName: nfs
    48.   nfs:
    49.     path: /nfsdata/pv3
    50.     server: 192.168.81.10

    1. [root@k8s2 pv]# kubectl apply -f pv.yaml
    2.  
    3. [root@k8s2 pv]# kubectl get pv

    创建pvc

    1. [root@k8s2 pv]# vim pvc.yaml
    2. apiVersion: v1
    3. kind: PersistentVolumeClaim
    4. metadata:
    5.   name: pvc1
    6. spec:
    7.   storageClassName: nfs
    8.   accessModes:
    9.     - ReadWriteOnce
    10.   resources:
    11.     requests:
    12.       storage: 1Gi
    13.  
    14. ---
    15. apiVersion: v1
    16. kind: PersistentVolumeClaim
    17. metadata:
    18.   name: pvc2
    19. spec:
    20.   storageClassName: nfs
    21.   accessModes:
    22.     - ReadWriteMany
    23.   resources:
    24.     requests:
    25.       storage: 10Gi
    26.  
    27. ---
    28. apiVersion: v1
    29. kind: PersistentVolumeClaim
    30. metadata:
    31.   name: pvc3
    32. spec:
    33.   storageClassName: nfs
    34.   accessModes:
    35.     - ReadOnlyMany
    36.   resources:
    37.     requests:
    38.       storage: 15Gi

    1. [root@k8s2 pv]# kubectl apply -f pvc.yaml
    2.  
    3. [root@k8s2 pv]# kubectl get pvc
    4. [root@k8s2 pv]# kubectl get pv

    创建pod

    1. [root@k8s2 pv]# vim pod.yaml
    2. apiVersion: v1
    3. kind: Pod
    4. metadata:
    5.   name: test-pd
    6. spec:
    7.   containers:
    8.   - image: nginx
    9.     name: nginx
    10.     volumeMounts:
    11.     - mountPath: /usr/share/nginx/html
    12.       name: vol1
    13.   volumes:
    14.   - name: vol1
    15.     persistentVolumeClaim:
    16.       claimName: pvc1

    在nfs输出目录中创建测试页

    1. [root@k8s2 pv]# kubectl apply -f pod.yaml
    2.  
    3. [root@k8s1 pv1]# echo pv1 > index.html
    4.  
    5. [root@k8s2 pv]# kubectl get pod -o wide
    6.  
    7. [root@k8s2 pv]# curl 10.244.106.144

    回收资源，需要按顺序回收：pod->pvc->pv

    1. [root@k8s2 pv]# kubectl delete  pod test-pd
    2. [root@k8s2 pv]# kubectl delete  -f pvc.yaml

    回收pvc后，pv会被回收再利用

    [root@k8s2 pv]# kubectl get pv

    pv的回收需要拉取镜像，提前在node节点导入镜像：registry.k8s.io/debian-base:v2.0.0

    registry.k8s.io 替代 k8s.gcr.io 这个仓库，但依然需要魔法上网

    1. containerd 导入镜像
    2. [root@k8s3 ~]# ctr -n=k8s.io image import debian-base.tar
    3. [root@k8s4 ~]# ctr -n=k8s.io image import debian-base.tar
    4.  
    5. docker
    6. [root@k8s3 ~]# docker pull registry.k8s.io/debian-base:v2.0.0
    7.  
    8. [root@k8s2 pv]# kubectl delete -f pv.yaml

    上传镜像

    创建sa并授权

    1. [root@k8s2 nfs]# vim rbac.yaml
    2. apiVersion: v1
    3. kind: Namespace
    4. metadata:
    5.   name: nfs-client-provisioner
    6. ---
    7. apiVersion: v1
    8. kind: ServiceAccount
    9. metadata:
    10.   name: nfs-client-provisioner
    11.   namespace: nfs-client-provisioner
    12. ---
    13. kind: ClusterRole
    14. apiVersion: rbac.authorization.k8s.io/v1
    15. metadata:
    16.   name: nfs-client-provisioner-runner
    17. rules:
    18.   - apiGroups: [""]
    19.     resources: ["nodes"]
    20.     verbs: ["get", "list", "watch"]
    21.   - apiGroups: [""]
    22.     resources: ["persistentvolumes"]
    23.     verbs: ["get", "list", "watch", "create", "delete"]
    24.   - apiGroups: [""]
    25.     resources: ["persistentvolumeclaims"]
    26.     verbs: ["get", "list", "watch", "update"]
    27.   - apiGroups: ["storage.k8s.io"]
    28.     resources: ["storageclasses"]
    29.     verbs: ["get", "list", "watch"]
    30.   - apiGroups: [""]
    31.     resources: ["events"]
    32.     verbs: ["create", "update", "patch"]
    33. ---
    34. kind: ClusterRoleBinding
    35. apiVersion: rbac.authorization.k8s.io/v1
    36. metadata:
    37.   name: run-nfs-client-provisioner
    38. subjects:
    39.   - kind: ServiceAccount
    40.     name: nfs-client-provisioner
    41.     namespace: nfs-client-provisioner
    42. roleRef:
    43.   kind: ClusterRole
    44.   name: nfs-client-provisioner-runner
    45.   apiGroup: rbac.authorization.k8s.io
    46. ---
    47. kind: Role
    48. apiVersion: rbac.authorization.k8s.io/v1
    49. metadata:
    50.   name: leader-locking-nfs-client-provisioner
    51.   namespace: nfs-client-provisioner
    52. rules:
    53.   - apiGroups: [""]
    54.     resources: ["endpoints"]
    55.     verbs: ["get", "list", "watch", "create", "update", "patch"]
    56. ---
    57. kind: RoleBinding
    58. apiVersion: rbac.authorization.k8s.io/v1
    59. metadata:
    60.   name: leader-locking-nfs-client-provisioner
    61.   namespace: nfs-client-provisioner
    62. subjects:
    63.   - kind: ServiceAccount
    64.     name: nfs-client-provisioner
    65.     namespace: nfs-client-provisioner
    66. roleRef:
    67.   kind: Role
    68.   name: leader-locking-nfs-client-provisioner
    69.   apiGroup: rbac.authorization.k8s.io
    70.  
    71. [root@k8s2 nfs]# kubectl apply -f rbac.yaml
    72.

    部署应用

    1. [root@k8s2 nfs]# vim deployment.yaml
    2. apiVersion: apps/v1
    3. kind: Deployment
    4. metadata:
    5.   name: nfs-client-provisioner
    6.   labels:
    7.     app: nfs-client-provisioner
    8.   namespace: nfs-client-provisioner
    9. spec:
    10.   replicas: 1
    11.   strategy:
    12.     type: Recreate
    13.   selector:
    14.     matchLabels:
    15.       app: nfs-client-provisioner
    16.   template:
    17.     metadata:
    18.       labels:
    19.         app: nfs-client-provisioner
    20.     spec:
    21.       serviceAccountName: nfs-client-provisioner
    22.       containers:
    23.         - name: nfs-client-provisioner
    24.           image: sig-storage/nfs-subdir-external-provisioner:v4.0.2
    25.           volumeMounts:
    26.             - name: nfs-client-root
    27.               mountPath: /persistentvolumes
    28.           env:
    29.             - name: PROVISIONER_NAME
    30.               value: k8s-sigs.io/nfs-subdir-external-provisioner
    31.             - name: NFS_SERVER
    32.               value: 192.168.81.10
    33.             - name: NFS_PATH
    34.               value: /nfsdata
    35.       volumes:
    36.         - name: nfs-client-root
    37.           nfs:
    38.             server: 192.168.81.10
    39.             path: /nfsdata
    40.  
    41. [root@k8s2 nfs]# kubectl apply -f deployment.yaml
    42.  
    43. [root@k8s2 nfs]# kubectl  -n nfs-client-provisioner get pod

    创建存储类

    1. [root@k8s2 nfs]# vim class.yaml
    2. apiVersion: storage.k8s.io/v1
    3. kind: StorageClass
    4. metadata:
    5.   name: nfs-client
    6. provisioner: k8s-sigs.io/nfs-subdir-external-provisioner
    7. parameters:
    8.   archiveOnDelete: "false"
    9.  
    10. [root@k8s2 nfs]# kubectl apply -f  class.yaml
    11.  
    12. [root@k8s2 nfs]# kubectl get sc

    创建pvc类

    1. [root@k8s2 nfs]# vim pvc.yaml
    2. kind: PersistentVolumeClaim
    3. apiVersion: v1
    4. metadata:
    5.   name: test-claim
    6. spec:
    7.   storageClassName: nfs-client
    8.   accessModes:
    9.     - ReadWriteMany
    10.   resources:
    11.     requests:
    12.       storage: 1Gi
    13.  
    14. [root@k8s2 nfs]# kubectl apply -f pvc.yaml
    15.  
    16. [root@k8s2 nfs]# kubectl get pvc

     

    创建pod

    1. [root@k8s2 nfs]# vim pod.yaml
    2. kind: Pod
    3. apiVersion: v1
    4. metadata:
    5.   name: test-pod
    6. spec:
    7.   containers:
    8.   - name: test-pod
    9.     image: busybox
    10.     command:
    11.       - "/bin/sh"
    12.     args:
    13.       - "-c"
    14.       - "touch /mnt/SUCCESS && exit 0 || exit 1"
    15.     volumeMounts:
    16.       - name: nfs-pvc
    17.         mountPath: "/mnt"
    18.   restartPolicy: "Never"
    19.   volumes:
    20.     - name: nfs-pvc
    21.       persistentVolumeClaim:
    22.         claimName: test-claim
    23.  
    24. [root@k8s2 nfs]# kubectl apply -f pod.yaml

    pod会在pv中创建一个文件

    设置默认存储类，这样在创建pvc时可以不用指定storageClassName

    [root@k8s2 pvc]# kubectl patch storageclass nfs-client -p '{"metadata": {"annotations":{"storageclass.kubernetes.io/is-default-class":"true"}}}'

    statefulset控制器

    1. [root@k8s2 statefulset]# vim headless.yaml
    2. apiVersion: v1
    3. kind: Service
    4. metadata:
    5.  name: nginx-svc
    6.  labels:
    7.   app: nginx
    8. spec:
    9.  ports:
    10.  - port: 80
    11.    name: web
    12.  clusterIP: None
    13.  selector:
    14.   app: nginx
    15. [root@k8s2 statefulset]# kubectl apply -f headless.yaml
    16. [root@k8s2 statefulset]# kubectl get svc

    1. [root@k8s2 statefulset]# vim statefulset.yaml
    2. apiVersion: apps/v1
    3. kind: StatefulSet
    4. metadata:
    5.  name: web
    6. spec:
    7.  serviceName: "nginx-svc"
    8.  replicas: 3
    9.  selector:
    10.   matchLabels:
    11.    app: nginx
    12.  template:
    13.   metadata:
    14.    labels:
    15.     app: nginx
    16.   spec:
    17.    containers:
    18.    - name: nginx
    19.      image: nginx
    20.      volumeMounts:
    21.        - name: www
    22.          mountPath: /usr/share/nginx/html
    23.  volumeClaimTemplates:
    24.   - metadata:
    25.      name: www
    26.     spec:
    27.      storageClassName: nfs-client
    28.      accessModes:
    29.      - ReadWriteOnce
    30.      resources:
    31.       requests:
    32.        storage: 1Gi
    33.  
    34. [root@k8s2 statefulset]# kubectl apply -f statefulset.yaml
    35. [root@k8s2 statefulset]# kubectl get pod

    在nfs输出目录创建测试页

    1. [root@k8s2 statefulset]# kubectl run demo --image busyboxplus -it
    2. / # curl  web-0.nginx-svc
    3. / # curl  web-1.nginx-svc
    4. / # curl  web-2.nginx-svc

    statefulset有序回收

    1. [root@k8s2 statefulset]# kubectl scale statefulsets web --replicas=0
    2. [root@k8s2 statefulset]# kubectl delete -f statefulset.yaml
    3. [root@k8s2 statefulset]# kubectl delete pvc --all

    上传镜像

     

    1. [root@k8s2 mysql]# vim configmap.yaml
    2. apiVersion: v1
    3. kind: ConfigMap
    4. metadata:
    5.   name: mysql
    6.   labels:
    7.     app: mysql
    8.     app.kubernetes.io/name: mysql
    9. data:
    10.   primary.cnf: |
    11.     [mysqld]
    12.     log-bin
    13.   replica.cnf: |
    14.     [mysqld]
    15.     super-read-only
    16. [root@k8s2 mysql]# kubectl apply -f configmap.yaml

    1. [root@k8s2 mysql]# vim svc.yaml
    2. apiVersion: v1
    3. kind: Service
    4. metadata:
    5.   name: mysql
    6.   labels:
    7.     app: mysql
    8.     app.kubernetes.io/name: mysql
    9. spec:
    10.   ports:
    11.   - name: mysql
    12.     port: 3306
    13.   clusterIP: None
    14.   selector:
    15.     app: mysql
    16. ---
    17. apiVersion: v1
    18. kind: Service
    19. metadata:
    20.   name: mysql-read
    21.   labels:
    22.     app: mysql
    23.     app.kubernetes.io/name: mysql
    24.     readonly: "true"
    25. spec:
    26.   ports:
    27.   - name: mysql
    28.     port: 3306
    29.   selector:
    30.     app: mysql
    31. [root@k8s2 mysql]# kubectl apply -f svc.yaml
    32. [root@k8s2 mysql]# kubectl get svc

    1. [root@k8s2 mysql]# vim statefulset.yaml
    2. apiVersion: apps/v1
    3. kind: StatefulSet
    4. metadata:
    5.   name: mysql
    6. spec:
    7.   selector:
    8.     matchLabels:
    9.       app: mysql
    10.       app.kubernetes.io/name: mysql
    11.   serviceName: mysql
    12.   replicas: 0
    13.   template:
    14.     metadata:
    15.       labels:
    16.         app: mysql
    17.         app.kubernetes.io/name: mysql
    18.     spec:
    19.       initContainers:
    20.       - name: init-mysql
    21.         image: mysql:5.7
    22.         command:
    23.         - bash
    24.         - "-c"
    25.         - |
    26.           set -ex
    27.           # 基于 Pod 序号生成 MySQL 服务器的 ID。
    28.           [[ $HOSTNAME =~ -([0-9]+)$ ]] || exit 1
    29.           ordinal=${BASH_REMATCH[1]}
    30.           echo [mysqld] > /mnt/conf.d/server-id.cnf
    31.           # 添加偏移量以避免使用 server-id=0 这一保留值。
    32.           echo server-id=$((100 + $ordinal)) >> /mnt/conf.d/server-id.cnf
    33.           # 将合适的 conf.d 文件从 config-map 复制到 emptyDir。
    34.           if [[ $ordinal -eq 0 ]]; then
    35.             cp /mnt/config-map/primary.cnf /mnt/conf.d/
    36.           else
    37.             cp /mnt/config-map/replica.cnf /mnt/conf.d/
    38.           fi
    39.         volumeMounts:
    40.         - name: conf
    41.           mountPath: /mnt/conf.d
    42.         - name: config-map
    43.           mountPath: /mnt/config-map
    44.       - name: clone-mysql
    45.         image: xtrabackup:1.0
    46.         command:
    47.         - bash
    48.         - "-c"
    49.         - |
    50.           set -ex
    51.           # 如果已有数据，则跳过克隆。
    52.           [[ -d /var/lib/mysql/mysql ]] && exit 0
    53.           # 跳过主实例（序号索引 0）的克隆。
    54.           [[ `hostname` =~ -([0-9]+)$ ]] || exit 1
    55.           ordinal=${BASH_REMATCH[1]}
    56.           [[ $ordinal -eq 0 ]] && exit 0
    57.           # 从原来的对等节点克隆数据。
    58.           ncat --recv-only mysql-$(($ordinal-1)).mysql 3307 | xbstream -x -C /var/lib/mysql
    59.           # 准备备份。
    60.           xtrabackup --prepare --target-dir=/var/lib/mysql
    61.         volumeMounts:
    62.         - name: data
    63.           mountPath: /var/lib/mysql
    64.           subPath: mysql
    65.         - name: conf
    66.           mountPath: /etc/mysql/conf.d
    67.       containers:
    68.       - name: mysql
    69.         image: mysql:5.7
    70.         env:
    71.         - name: MYSQL_ALLOW_EMPTY_PASSWORD
    72.           value: "1"
    73.         ports:
    74.         - name: mysql
    75.           containerPort: 3306
    76.         volumeMounts:
    77.         - name: data
    78.           mountPath: /var/lib/mysql
    79.           subPath: mysql
    80.         - name: conf
    81.           mountPath: /etc/mysql/conf.d
    82.         resources:
    83.           requests:
    84.             cpu: 500m
    85.             memory: 512Mi
    86.         livenessProbe:
    87.           exec:
    88.             command: ["mysqladmin", "ping"]
    89.           initialDelaySeconds: 30
    90.           periodSeconds: 10
    91.           timeoutSeconds: 5
    92.         readinessProbe:
    93.           exec:
    94.             # 检查我们是否可以通过 TCP 执行查询（skip-networking 是关闭的）。
    95.             command: ["mysql", "-h", "127.0.0.1", "-e", "SELECT 1"]
    96.           initialDelaySeconds: 5
    97.           periodSeconds: 2
    98.           timeoutSeconds: 1
    99.       - name: xtrabackup
    100.         image: xtrabackup:1.0
    101.         ports:
    102.         - name: xtrabackup
    103.           containerPort: 3307
    104.         command:
    105.         - bash
    106.         - "-c"
    107.         - |
    108.           set -ex
    109.           cd /var/lib/mysql
    110.  
    111.           # 确定克隆数据的 binlog 位置（如果有的话）。
    112.           if [[ -f xtrabackup_slave_info && "x$( != "x" ]]; then
    113.             # XtraBackup 已经生成了部分的 “CHANGE MASTER TO” 查询
    114.             # 因为我们从一个现有副本进行克隆。(需要删除末尾的分号!)
    115.             cat xtrabackup_slave_info | sed -E 's/;$//g' > change_master_to.sql.in
    116.             # 在这里要忽略 xtrabackup_binlog_info （它是没用的）。
    117.             rm -f xtrabackup_slave_info xtrabackup_binlog_info
    118.           elif [[ -f xtrabackup_binlog_info ]]; then
    119.             # 我们直接从主实例进行克隆。解析 binlog 位置。
    120.             [[ `cat xtrabackup_binlog_info` =~ ^(.*?)[[:space:]]+(.*?)$ ]] || exit 1
    121.             rm -f xtrabackup_binlog_info xtrabackup_slave_info
    122.             echo "CHANGE MASTER TO MASTER_LOG_FILE='${BASH_REMATCH[1]}',\
    123.                   MASTER_LOG_POS=${BASH_REMATCH[2]}" > change_master_to.sql.in
    124.           fi
    125.  
    126.           # 检查我们是否需要通过启动复制来完成克隆。
    127.           if [[ -f change_master_to.sql.in ]]; then
    128.             echo "Waiting for mysqld to be ready (accepting connections)"
    129.             until mysql -h 127.0.0.1 -e "SELECT 1"; do sleep 1; done
    130.  
    131.             echo "Initializing replication from clone position"
    132.             mysql -h 127.0.0.1 \
    133.                   -e "$(
    134.                           MASTER_HOST='mysql-0.mysql', \
    135.                           MASTER_USER='root', \
    136.                           MASTER_PASSWORD='', \
    137.                           MASTER_CONNECT_RETRY=10; \
    138.                         START SLAVE;" || exit 1
    139.             # 如果容器重新启动，最多尝试一次。
    140.             mv change_master_to.sql.in change_master_to.sql.orig
    141.           fi
    142.  
    143.           # 当对等点请求时，启动服务器发送备份。
    144.           exec ncat --listen --keep-open --send-only --max-conns=1 3307 -c \
    145.             "xtrabackup --backup --slave-info --stream=xbstream --host=127.0.0.1 --user=root"
    146.         volumeMounts:
    147.         - name: data
    148.           mountPath: /var/lib/mysql
    149.           subPath: mysql
    150.         - name: conf
    151.           mountPath: /etc/mysql/conf.d
    152.         resources:
    153.           requests:
    154.             cpu: 100m
    155.             memory: 100Mi
    156.       volumes:
    157.       - name: conf
    158.         emptyDir: {}
    159.       - name: config-map
    160.         configMap:
    161.           name: mysql
    162.   volumeClaimTemplates:
    163.   - metadata:
    164.       name: data
    165.     spec:
    166.       accessModes: ["ReadWriteOnce"]
    167.       resources:
    168.         requests:
    169.           storage: 10Gi
    170.  
    171. [root@k8s2 mysql]# kubectl apply -f statefulset.yaml
    172.  
    173. [root@k8s2 mysql]# kubectl get pod

    连接测试

    1. [root@k8s2 mysql]# kubectl  run demo --image mysql:5.7 -it -- bash
    2. bash-4.2# mysql -h mysql-0.mysql
    3.  
    4. mysql> show databases;

    回收

    1. [root@k8s2 mysql]# kubectl delete -f statefulset.yaml
    2. [root@k8s2 mysql]# kubectl delete pvc --all

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  • 原文地址：https://blog.csdn.net/m0_64028800/article/details/134275693