Rancher部署NFS持久化存储

我不是女神ヾ 2022-12-29 06:35 617阅读 0赞

### Rancher部署NFS持久化存储 ###

*  持久化存储
 *   *  1 安装NFS v4
     *  2 动态创建持久卷
     *   *  2.1 部署第三方提供的nfs存储类provisioner
         *  2.1.1 使用非Helm方式部署
         *  2.2 配置存储类
         *   *  2.2.1 部署StorageClass
             *  2.2.2 验证
     *  3 部署一个zk集群
     *   *  3.1 部署zk的ConfigMap
         *  3.2 部署zk

> 上一篇介绍了如何[通过Rancher搭建k8s集群][Rancher_k8s]，这里继续介绍通过Rancher配置管理k8s集群

# 持久化存储 #

> [参考Rancher官网：https://docs.rancher.cn/docs/rancher2/cluster-admin/volumes-and-storage/\_index/][Rancher_https_docs.rancher.cn_docs_rancher2_cluster-admin_volumes-and-storage_index]  
> 这里以NFS为例

## 1 安装NFS v4 ##

> 请参考 [Centos7 安装配置NFS v4：https://blog.csdn.net/iceliooo/article/details/111592244][Centos7 _NFS v4_https_blog.csdn.net_iceliooo_article_details_111592244]

## 2 动态创建持久卷 ##

### 2.1 部署第三方提供的nfs存储类provisioner ###

> 见k8s官网：  
> [https://kubernetes.io/docs/concepts/storage/storage-classes/\#parameters][https_kubernetes.io_docs_concepts_storage_storage-classes_parameters]  
> [https://github.com/kubernetes-sigs/sig-storage-lib-external-provisioner][https_github.com_kubernetes-sigs_sig-storage-lib-external-provisioner]  
> [https://github.com/kubernetes-sigs/nfs-subdir-external-provisioner][https_github.com_kubernetes-sigs_nfs-subdir-external-provisioner]

> 这里发现rancher并没有提供nfs存储类provisioner  
> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ljZWxpb29v_size_16_color_FFFFFF_t_70]

### 2.1.1 使用非Helm方式部署 ###

> 1.参考官网编写yaml文件

[root@uat-master nfs-subdir-external-provisioner]# vim rbac.yaml
    
    apiVersion: v1
    kind: ServiceAccount
    metadata:
      name: nfs-client-provisioner
      namespace: middleware
    ---
    kind: ClusterRole
    apiVersion: rbac.authorization.k8s.io/v1
    metadata:
      name: nfs-client-provisioner-runner
    rules:
      - apiGroups: [""]
        resources: ["persistentvolumes"]
        verbs: ["get", "list", "watch", "create", "delete"]
      - apiGroups: [""]
        resources: ["persistentvolumeclaims"]
        verbs: ["get", "list", "watch", "update"]
      - apiGroups: ["storage.k8s.io"]
        resources: ["storageclasses"]
        verbs: ["get", "list", "watch"]
      - apiGroups: [""]
        resources: ["events"]
        verbs: ["create", "update", "patch"]
    ---
    kind: ClusterRoleBinding
    apiVersion: rbac.authorization.k8s.io/v1
    metadata:
      name: run-nfs-client-provisioner
    subjects:
      - kind: ServiceAccount
        name: nfs-client-provisioner
        namespace: middleware
    roleRef:
      kind: ClusterRole
      name: nfs-client-provisioner-runner
      apiGroup: rbac.authorization.k8s.io
    ---
    kind: Role
    apiVersion: rbac.authorization.k8s.io/v1
    metadata:
      name: leader-locking-nfs-client-provisioner
      namespace: middleware
    rules:
      - apiGroups: [""]
        resources: ["endpoints"]
        verbs: ["get", "list", "watch", "create", "update", "patch"]
    ---
    kind: RoleBinding
    apiVersion: rbac.authorization.k8s.io/v1
    metadata:
      name: leader-locking-nfs-client-provisioner
      namespace: middleware
    subjects:
      - kind: ServiceAccount
        name: nfs-client-provisioner
        namespace: middleware
    roleRef:
      kind: Role
      name: leader-locking-nfs-client-provisioner
      apiGroup: rbac.authorization.k8s.io

[root@uat-master nfs-subdir-external-provisioner]# vim deployment.yaml
    
    apiVersion: apps/v1
    kind: Deployment
    metadata:
      name: nfs-client-provisioner
      labels:
        app: nfs-client-provisioner
      namespace: middleware
    spec:
      replicas: 1
      strategy:
        type: Recreate
      selector:
        matchLabels:
          app: nfs-client-provisioner
      template:
        metadata:
          labels:
            app: nfs-client-provisioner
        spec:
          serviceAccountName: nfs-client-provisioner
          containers:
            - name: nfs-client-provisioner
              image: quay.io/external_storage/nfs-client-provisioner:latest
              volumeMounts:
                - name: nfs-client-root
                  mountPath: /persistentvolumes
              env:
                - name: PROVISIONER_NAME
                  value: fuseim.pri/ifs
                - name: NFS_SERVER
                  value: 172.18.30.x
                - name: NFS_PATH
                  value: /data/nfs
          volumes:
            - name: nfs-client-root
              nfs:
                server: 172.18.30.x
                path: /data/nfs

> 1.  部署

> 创建uat项目，在uat项目下创建namespace: middleware  
> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ljZWxpb29v_size_16_color_FFFFFF_t_70 1]

> 部署rbac.yaml

[root@uat-master nfs-subdir-external-provisioner]# kubectl create -f rbac.yaml 
    serviceaccount/nfs-client-provisioner created
    clusterrole.rbac.authorization.k8s.io/nfs-client-provisioner-runner created
    clusterrolebinding.rbac.authorization.k8s.io/run-nfs-client-provisioner created
    role.rbac.authorization.k8s.io/leader-locking-nfs-client-provisioner created
    rolebinding.rbac.authorization.k8s.io/leader-locking-nfs-client-provisioner created
    [root@uat-master nfs-subdir-external-provisioner]#

> 部署deployment.yaml  
> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ljZWxpb29v_size_16_color_FFFFFF_t_70 2]  
> 也可以通过kubectl 部署

[root@uat-master nfs-subdir-external-provisioner]# kubectl create -f deployment.yaml 
    deployment.apps/nfs-client-provisioner created
    [root@uat-master nfs-subdir-external-provisioner]#

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ljZWxpb29v_size_16_color_FFFFFF_t_70 3]

> 发现POD部署异常

[root@uat-master nfs-subdir-external-provisioner]# kubectl describe pod nfs-client-provisioner-6f79df9fcc-4668b -n middleware
    Name:           nfs-client-provisioner-6f79df9fcc-4668b
    Namespace:      middleware
    Priority:       0
    Node:           uat-w2/172.18.30.214
    Start Time:     Thu, 24 Dec 2020 11:30:18 +0800
    Labels:         app=nfs-client-provisioner
                    pod-template-hash=6f79df9fcc
    ······
    Events:
      Type     Reason       Age               From               Message
      ----     ------       ----              ----               -------
      Normal   Scheduled    <unknown>         default-scheduler  Successfully assigned middleware/nfs-client-provisioner-6f79df9fcc-4668b to uat-w2
      Warning  FailedMount  56s (x8 over 2m)  kubelet, uat-w2    MountVolume.SetUp failed for volume "nfs-client-root" : mount failed: exit status 32
    Mounting command: mount
    Mounting arguments: -t nfs 172.18.30.214:/data/nfs /var/lib/kubelet/pods/3325beb4-909d-4fbf-be15-54c4903ebda8/volumes/kubernetes.io~nfs/nfs-client-root
    Output: mount.nfs: access denied by server while mounting 172.18.30.214:/data/nfs
    [root@uat-master nfs-subdir-external-provisioner]#

> 这里属于nfs访问权限问题，可将nfs服务端访问IP限制取消

[root@uat-w2 nfs]# vi /etc/exports
    [root@uat-w2 nfs]# cat /etc/exports
    /data/nfs   *(rw,sync,no_root_squash)
    [root@uat-w2 nfs]# exportfs -r
    [root@uat-w2 nfs]#

> 成功部署 nfs-client-provisioner  
> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ljZWxpb29v_size_16_color_FFFFFF_t_70 4]

### 2.2 配置存储类 ###

#### 2.2.1 部署StorageClass ####

> 创建class.yaml

[root@uat-master nfs-subdir-external-provisioner]# vim class.yaml
    apiVersion: storage.k8s.io/v1
    kind: StorageClass
    metadata:
      name: managed-nfs-storage
    provisioner: fuseim.pri/ifs # or choose another name, must match deployment's env PROVISIONER_NAME'
    parameters:
      archiveOnDelete: "false"

> 部署class.yaml

[root@uat-master nfs-subdir-external-provisioner]# kubectl create -f class.yaml 
    storageclass.storage.k8s.io/managed-nfs-storage created
    [root@uat-master nfs-subdir-external-provisioner]#

> 部署成功  
> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ljZWxpb29v_size_16_color_FFFFFF_t_70 5]

#### 2.2.2 验证 ####

> 创建test-claim.yaml、test-pod.yaml

[root@uat-master nfs-subdir-external-provisioner]# vim test-claim.yaml
    
    kind: PersistentVolumeClaim
    apiVersion: v1
    metadata:
      name: test-claim
      annotations:
        volume.beta.kubernetes.io/storage-class: "managed-nfs-storage"
    spec:
      storageClassName: managed-nfs-storage
      accessModes:
        - ReadWriteMany
      resources:
        requests:
          storage: 1Mi

[root@uat-master nfs-subdir-external-provisioner]# vim test-pod.yaml
    
    kind: Pod
    apiVersion: v1
    metadata:
      name: test-pod
    spec:
      containers:
      - name: test-pod
        image: busybox:1.24
        command:
          - "/bin/sh"
        args:
          - "-c"
          - "touch /mnt/SUCCESS && exit 0 || exit 1"
        volumeMounts:
          - name: nfs-pvc
            mountPath: "/mnt"
      restartPolicy: "Never"
      volumes:
        - name: nfs-pvc
          persistentVolumeClaim:
            claimName: test-claim

> 部署

[root@uat-master nfs-subdir-external-provisioner]# kubectl create -f test-claim.yaml 
    persistentvolumeclaim/test-claim created
    [root@uat-master nfs-subdir-external-provisioner]# kubectl create -f test-pod.yaml 
    pod/test-pod created
    [root@uat-master nfs-subdir-external-provisioner]#

> 成功创建PVC、PV  
> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ljZWxpb29v_size_16_color_FFFFFF_t_70 6]

> NFS服务端成功创建test-pod创建的文件

[root@uat-w2 nfs]# ll
    total 8
    drwxrwxrwx 2 root root 4096 Dec 24 13:53 default-test-claim-pvc-9ab67258-5888-4721-b5ce-87288641bb1f
    -rw-r--r-- 1 root root    7 Dec 23 17:07 hello.txt
    [root@uat-w2 nfs]# cd default-test-claim-pvc-9ab67258-5888-4721-b5ce-87288641bb1f/
    [root@uat-w2 default-test-claim-pvc-9ab67258-5888-4721-b5ce-87288641bb1f]# ll
    total 0
    -rw-r--r-- 1 root root 0 Dec 24 14:03 SUCCESS

> 删除验证资源

[root@uat-master nfs-subdir-external-provisioner]# kubectl delete -f test-claim.yaml -f test-pod.yaml 
    persistentvolumeclaim "test-claim" deleted
    pod "test-pod" deleted
    [root@uat-master nfs-subdir-external-provisioner]#

## 3 部署一个zk集群 ##

### 3.1 部署zk的ConfigMap ###

> 创建配置文件

[root@uat-master zk]# vim zk-cm.yaml
    
    apiVersion: v1
    kind: ConfigMap
    metadata:
      name: zk-cm
      namespace: middleware
    data:
      client.cnxns: "60"
      init: "10"
      jvm.heap: 1G
      purge.interval: "0"
      snap.retain: "3"
      sync: "5"
      tick: "2000"

> 部署

[root@uat-master zk]# kubectl create -f zk-cm.yaml 
    configmap/zk-cm created
    [root@uat-master zk]#

> 部署成功，也可以通过Rancher UI 部署  
> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ljZWxpb29v_size_16_color_FFFFFF_t_70 7]  
> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ljZWxpb29v_size_16_color_FFFFFF_t_70 8]

### 3.2 部署zk ###

*  部署zk工作负载

> 数据卷中选择添加PVC模板  
> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ljZWxpb29v_size_16_color_FFFFFF_t_70 9]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ljZWxpb29v_size_16_color_FFFFFF_t_70 10]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ljZWxpb29v_size_16_color_FFFFFF_t_70 11]

> 成功创建工作负载及PVC  
> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ljZWxpb29v_size_16_color_FFFFFF_t_70 12]  
> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ljZWxpb29v_size_16_color_FFFFFF_t_70 13]

> nfs服务端也自动生成了相应的PV目录

[root@uat-w2 nfs]# ll
    total 16
    -rw-r--r-- 1 root root    7 Dec 23 17:07 hello.txt
    drwxrwxrwx 2 root root 4096 Dec 25 16:59 middleware-data-zookeeper-0-pvc-db84b366-352b-4402-a759-8345feef65af
    drwxrwxrwx 2 root root 4096 Dec 25 16:59 middleware-data-zookeeper-1-pvc-3437ff3e-9965-4387-8949-d3d6ba7c275e
    drwxrwxrwx 2 root root 4096 Dec 25 17:00 middleware-data-zookeeper-2-pvc-ebe6eda8-217c-42ef-bf80-f9652926dbcc
    [root@uat-w2 nfs]#

*  验证

> 在zookeeper-0上创建节点hello 值为world，在zookeeper-1中却不能获节点hello，由此推断集群存在异常

[root@uat-master ~]# kubectl exec zookeeper-0 -n middleware zkCli.sh create /hello world
    Connecting to localhost:2181
    log4j:WARN No appenders could be found for logger (org.apache.zookeeper.ZooKeeper).
    log4j:WARN Please initialize the log4j system properly.
    log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
    
    WATCHER::
    
    WatchedEvent state:SyncConnected type:None path:null
    Created /hello
    [root@uat-master ~]# kubectl exec zookeeper-1 -n middleware zkCli.sh get /hello
    Connecting to localhost:2181
    log4j:WARN No appenders could be found for logger (org.apache.zookeeper.ZooKeeper).
    log4j:WARN Please initialize the log4j system properly.
    log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
    
    WATCHER::
    
    WatchedEvent state:SyncConnected type:None path:null
    Node does not exist: /hello
    [root@uat-master ~]#

*  问题排查

> 查看节点配置文件，发现没有进行集权配置

[root@uat-w2 conf]# cat /data/nfs/middleware-data-zookeeper-1-pvc-f3d6edd7-baa1-47d2-8842-ddb74c50b895/conf/zoo.cfg 
    clientPort=2181
    dataDir=/data
    dataLogDir=/datalog
    tickTime=2000
    initLimit=5
    syncLimit=2
    maxClientCnxns=60
    [root@uat-w2 conf]#

> 1、修改配置文件zoo.cfg（修改3个节点的配置文件）

[root@uat-w2 conf]# vim zoo.cfg 
    
    clientPort=2181
    dataDir=/data
    dataLogDir=/datalog
    tickTime=2000
    initLimit=10
    syncLimit=2000
    maxClientCnxns=60
    minSessionTimeout= 4000
    maxSessionTimeout= 40000
    autopurge.snapRetainCount=3
    autopurge.purgeInteval=0
    server.1=zookeeper-0.zookeeper.middleware.svc.cluster.local:2888:3888
    server.2=zookeeper-1.zookeeper.middleware.svc.cluster.local:2888:3888
    server.3=zookeeper-2.zookeeper.middleware.svc.cluster.local:2888:3888

> 2、修改myid 文件，里面的值和 zoo.cfg 的server.x 配置保持一致

# zookeeper-1节点myid值修改为2
    [root@uat-w2 data]# vim myid 
    2
    # zookeeper-2节点myid值修改为3
    [root@uat-w2 data]# vim myid 
    3

> 3、删除Pod  
> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ljZWxpb29v_size_16_color_FFFFFF_t_70 14]  
> 4、再次验证，成功

[root@uat-master ~]# kubectl exec zookeeper-0 -n middleware zkCli.sh create /hello world
    Connecting to localhost:2181
    log4j:WARN No appenders could be found for logger (org.apache.zookeeper.ZooKeeper).
    log4j:WARN Please initialize the log4j system properly.
    log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
    
    WATCHER::
    
    WatchedEvent state:SyncConnected type:None path:null
    Created /hello
    [root@uat-master ~]# kubectl exec zookeeper-1 -n middleware zkCli.sh get /hello
    Connecting to localhost:2181
    log4j:WARN No appenders could be found for logger (org.apache.zookeeper.ZooKeeper).
    log4j:WARN Please initialize the log4j system properly.
    log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
    
    WATCHER::
    
    WatchedEvent state:SyncConnected type:None path:null
    cZxid = 0x100000003
    world
    ctime = Sat Jan 02 13:56:52 GMT 2021
    mZxid = 0x100000003
    mtime = Sat Jan 02 13:56:52 GMT 2021
    pZxid = 0x100000003
    cversion = 0
    dataVersion = 0
    aclVersion = 0
    ephemeralOwner = 0x0
    dataLength = 5
    numChildren = 0
    [root@uat-master ~]#

> 节点状态也正常

[root@uat-master ~]# kubectl exec zookeeper-0 -n middleware zkServer.sh status
    ZooKeeper JMX enabled by default
    Using config: /conf/zoo.cfg
    Mode: follower
    [root@uat-master ~]# kubectl exec zookeeper-1 -n middleware zkServer.sh status
    ZooKeeper JMX enabled by default
    Using config: /conf/zoo.cfg
    Mode: follower
    [root@uat-master ~]# kubectl exec zookeeper-2 -n middleware zkServer.sh status
    ZooKeeper JMX enabled by default
    Using config: /conf/zoo.cfg
    Mode: leader
    [root@uat-master ~]#

[Rancher_k8s]: https://blog.csdn.net/iceliooo/article/details/111402309
[Rancher_https_docs.rancher.cn_docs_rancher2_cluster-admin_volumes-and-storage_index]: https://docs.rancher.cn/docs/rancher2/cluster-admin/volumes-and-storage/_index/
[Centos7 _NFS v4_https_blog.csdn.net_iceliooo_article_details_111592244]: https://blog.csdn.net/iceliooo/article/details/111592244
[https_kubernetes.io_docs_concepts_storage_storage-classes_parameters]: https://kubernetes.io/docs/concepts/storage/storage-classes/#parameters
[https_github.com_kubernetes-sigs_sig-storage-lib-external-provisioner]: https://github.com/kubernetes-sigs/sig-storage-lib-external-provisioner
[https_github.com_kubernetes-sigs_nfs-subdir-external-provisioner]: https://github.com/kubernetes-sigs/nfs-subdir-external-provisioner
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ljZWxpb29v_size_16_color_FFFFFF_t_70]: /images/20221120/cf7fa74956464663b433583b793bbea1.png
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