nacos集群部署-k8s环境

通过StatefulSets 在Kubernetes上部署Nacos

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快速部署可以参考官网https://nacos.io/en-us/docs/use-nacos-with-kubernetes.html

1 快速部署

git clone https://github.com/nacos-group/nacos-k8s.git 
cd nacos-k8s
chmod +x quick-startup.sh
./quick-startup.sh

1.2服务测试

服务注册
curl -X PUT 'http://cluster-ip:8848/nacos/v1/ns/instance?serviceName=nacos.naming.serviceName&ip=20.18.7.10&port=8080'
服务发现
curl -X GET 'http://cluster-ip:8848/nacos/v1/ns/instances?serviceName=nacos.naming.serviceName'
发布配置
curl -X POST "http://cluster-ip:8848/nacos/v1/cs/configs?dataId=nacos.cfg.dataId&group=test&content=helloWorld"
获取配置
curl -X GET "http://cluster-ip:8848/nacos/v1/cs/configs?dataId=nacos.cfg.dataId&group=test"

2 NFS方式部署。

NFS的使用是为了保留数据，数据库的数据以及nacos的数据日志等。

该方式部署需要对官方的yaml进行修改，下面列出实测可用的步骤及yaml文件

2.1部署NFS服务环境

  找一台可以与k8s环境通信的内网机器192.168.1.10，在机器上部署nfs服务，选择合适磁盘，作为共享目录。

yum install -y nfs-utils rpcbind

mkdir -p /data/nfs
mkdir -p /data/MySQL_master 
mkdir -p /data/mysql_slave

vim /etc/exports
/data/nfs *(insecure,rw,async,no_root_squash)
/data/mysql_slave *(insecure,rw,async,no_root_squash)
/data/mysql_master *(insecure,rw,async,no_root_squash)

systemctl start rpcbind
systemctl start nfs
systemctl enable rpcbind
systemctl enable nfs-server

exportfs -a
showmount -e

2.2 k8s上部署nfs

cd nacos-k8s/deploy/nfs/
[root@localhost nfs]# ll
总用量 12
-rw-r--r--. 1 root root  153 10月 15 08:05 class.yaml
-rw-r--r--. 1 root root  877 10月 15 14:37 deployment.yaml
-rw-r--r--. 1 root root 1508 10月 15 08:05 rbac.yaml

2.2.1 创建rbac,使用默认的rbac.yaml 不用修改，采用的是default命名空间，如果需要部署到特定的命名空间，则修改其中的namespace。

kubectl create -f rbac.yaml

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: [""]
  resources: ["endpoints"]
  verbs: ["get", "list", "watch", "create", "update", "patch"]
- 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: default
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
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
subjects:
- kind: ServiceAccount
  name: nfs-client-provisioner
  # replace with namespace where provisioner is deployed
  namespace: default
roleRef:
  kind: Role
  name: leader-locking-nfs-client-provisioner

2.2.2 创建ServiceAccount和部署NFS-Client Provisioner

kubectl create -f deployment.yaml    ##修改ip和目录

apiVersion: v1
kind: ServiceAccount
metadata:
  name: nfs-client-provisioner
---
kind: Deployment
apiVersion: extensions/v1beta1
metadata:
  name: nfs-client-provisioner
spec:
  replicas: 1
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: nfs-client-provisioner
    spec:
      serviceAccount: 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: 192.168.1.10
        - name: NFS_PATH
          value: /data/nfs
      volumes:
      - name: nfs-client-root
        nfs:
          server: 192.168.1.10
          path: /data/nfs

2.2.3 创建NFS StorageClass

kubectl create -f class.yaml   ##无需修改yaml

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: managed-nfs-storage
provisioner: fuseim.pri/ifs
parameters:
  archiveOnDelete: "false"

2.3 部署数据库

cd nacos-k8s/deploy/mysql/

2.3.1部署主数据库

kubectl create -f mysql-master-nfs.yaml  ##需要修改的是nfs的IP和目录

apiVersion: v1
kind: ReplicationController
metadata:
  name: mysql-master
  labels:
    name: mysql-master
spec:
  replicas: 1
  selector:
    name: mysql-master
  template:
    metadata:
      labels:
        name: mysql-master
    spec:
      containers:
      - name: master
        image: nacos/nacos-mysql-master:latest
        ports:
        - containerPort: 3306
        volumeMounts:
        - name: mysql-master-data
          mountPath: /var/lib/mysql
        env:
        - name: MYSQL_ROOT_PASSWORD
          value: "root"
        - name: MYSQL_DATABASE
          value: "nacos_devtest"
        - name: MYSQL_USER
          value: "nacos"
        - name: MYSQL_PASSWORD
          value: "nacos"
        - name: MYSQL_REPLICATION_USER
          value: 'nacos_ru'
        - name: MYSQL_REPLICATION_PASSWORD
          value: 'nacos_ru'
      volumes:
      - name: mysql-master-data
        nfs:
          server: 192.168.1.10
          path: /data/mysql_master
---
apiVersion: v1
kind: Service
metadata:
  name: mysql-master
  labels:
    name: mysql-master
spec:
  ports:
  - port: 3306
    targetPort: 3306
  selector:
    name: mysql-master

2.3.2 部署从数据库

kubectl create -f  mysql-slave-nfs.yaml

apiVersion: v1
kind: ReplicationController
metadata:
  name: mysql-slave
  labels:
    name: mysql-slave
spec:
  replicas: 1
  selector:
    name: mysql-slave
  template:
    metadata:
      labels:
        name: mysql-slave
    spec:
      containers:
      - name: slave
        image: nacos/nacos-mysql-slave:latest
        ports:
        - containerPort: 3306
        volumeMounts:
        - name: mysql-slave-data
          mountPath: /var/lib/mysql
        env:
        - name: MYSQL_ROOT_PASSWORD
          value: "root"
        - name: MYSQL_REPLICATION_USER
          value: 'nacos_ru'
        - name: MYSQL_REPLICATION_PASSWORD
          value: 'nacos_ru'
      volumes:
      - name: mysql-slave-data
        nfs:
          server: 192.168.1.10
          path: /data/mysql_slave
---
apiVersion: v1
kind: Service
metadata:
  name: mysql-slave
  labels:
    name: mysql-slave
spec:
  ports:
  - port: 3306
    targetPort: 3306
  selector:
    name: mysql-slave

2.4  部署nacos

cd nacos-k8s/deploy/nacos/

kubectl create -f nacos-pvc-nfs.yaml   ##该文件需要大修改，主要是改成基于quickstart版本增加挂载，其他无关的内容清理掉，具体如下

注意- name: NACOS_SERVERS这一项，创建时候域名是会自动生成一个这样的cluster.local，nacos-0.nacos-headless.default.svc.cluster.local:8848，我的k8s默认集群名设置成了cluster.test。所以文件中修改成这样的nacos-0.nacos-headless.default.svc.cluster.test:8848。

---
apiVersion: v1
kind: Service
metadata:
  name: nacos-headless
  labels:
    app: nacos-headless
spec:
  ports:
    - port: 8848
      name: server
      targetPort: 8848
  selector:
    app: nacos
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: nacos-cm
data:
  mysql.master.db.name: "nacos_devtest"
  mysql.master.port: "3306"
  mysql.slave.port: "3306"
  mysql.master.user: "nacos"
  mysql.master.password: "nacos"
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: nacos
spec:
  serviceName: nacos-headless
  replicas: 3
  template:
    metadata:
      labels:
        app: nacos
      annotations:
        pod.alpha.kubernetes.io/initialized: "true"
    spec:
      affinity:
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            - labelSelector:
                matchExpressions:
                  - key: "app"
                    operator: In
                    values:
                      - nacos-headless
              topologyKey: "kubernetes.io/hostname"
      containers:
        - name: k8snacos
          imagePullPolicy: Always
          image: nacos/nacos-server:latest
          resources:
            requests:
              memory: "2Gi"
              cpu: "500m"
          ports:
            - containerPort: 8848
              name: client
          env:
            - name: NACOS_REPLICAS
              value: "3"
            - name: SERVICE_NAME
              value: "nacos-headless"
            - name: POD_NAMESPACE
              valueFrom:
                fieldRef:
                  apiVersion: v1
                  fieldPath: metadata.namespace
            - name: MYSQL_MASTER_SERVICE_DB_NAME
              valueFrom:
                configMapKeyRef:
                  name: nacos-cm
                  key: mysql.master.db.name
            - name: MYSQL_MASTER_SERVICE_PORT
              valueFrom:
                configMapKeyRef:
                  name: nacos-cm
                  key: mysql.master.port
            - name: MYSQL_SLAVE_SERVICE_PORT
              valueFrom:
                configMapKeyRef:
                  name: nacos-cm
                  key: mysql.slave.port
            - name: MYSQL_MASTER_SERVICE_USER
              valueFrom:
                configMapKeyRef:
                  name: nacos-cm
                  key: mysql.master.user
            - name: MYSQL_MASTER_SERVICE_PASSWORD
              valueFrom:
                configMapKeyRef:
                  name: nacos-cm
                  key: mysql.master.password
            - name: NACOS_SERVER_PORT
              value: "8848"
            - name: PREFER_HOST_MODE
              value: "hostname"
            - name: NACOS_SERVERS
              value: "nacos-0.nacos-headless.default.svc.cluster.test:8848 nacos-1.nacos-headless.default.svc.cluster.test:8848 nacos-2.nacos-headless.default.svc.cluster.test:8848"
          volumeMounts:
            - name: datadir
              mountPath: /home/nacos/data
            - name: logdir
              mountPath: /home/nacos/logs
  volumeClaimTemplates:
    - metadata:
        name: datadir
        annotations:
          volume.beta.kubernetes.io/storage-class: "managed-nfs-storage"
      spec:
        accessModes: [ "ReadWriteMany" ]
        resources:
          requests:
            storage: 5Gi
    - metadata:
        name: logdir
        annotations:
          volume.beta.kubernetes.io/storage-class: "managed-nfs-storage"
      spec:
        accessModes: [ "ReadWriteMany" ]
        resources:
          requests:
            storage: 5Gi
  selector:
    matchLabels:
      app: nacos

也可以使用这种原始的

---
apiVersion: v1
kind: Service
metadata:
  name: nacos-headless
  labels:
    app: nacos
  annotations:
    service.alpha.kubernetes.io/tolerate-unready-endpoints: "true"
spec:
  ports:
    - port: 8848
      name: server
      targetPort: 8848
  clusterIP: None
  selector:
    app: nacos
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: nacos-cm
data:
  mysql.master.db.name: "nacos_devtest"
  mysql.master.port: "3306"
  mysql.slave.port: "3306"
  mysql.master.user: "nacos"
  mysql.master.password: "nacos"
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: nacos
spec:
  serviceName: nacos-headless
  replicas: 2
  template:
    metadata:
      labels:
        app: nacos
      annotations:
        pod.alpha.kubernetes.io/initialized: "true"
    spec:
      affinity:
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            - labelSelector:
                matchExpressions:
                  - key: "app"
                    operator: In
                    values:
                      - nacos
              topologyKey: "kubernetes.io/hostname"
      serviceAccountName: nfs-client-provisioner
      initContainers:
        - name: peer-finder-plugin-install
          image: nacos/nacos-peer-finder-plugin:latest
          imagePullPolicy: Always
          volumeMounts:
            - mountPath: "/home/nacos/plugins/peer-finder"
              name: plugindir
      containers:
        - name: nacos
          imagePullPolicy: Always
          image: nacos/nacos-server:latest
          resources:
            requests:
              memory: "2Gi"
              cpu: "1000m"
          ports:
            - containerPort: 8848
              name: client-port
          env:
            - name: NACOS_REPLICAS
              value: "3"
            - name: SERVICE_NAME
              value: "nacos-headless"
            - name: POD_NAMESPACE
              valueFrom:
                fieldRef:
                  apiVersion: v1
                  fieldPath: metadata.namespace
            - name: MYSQL_MASTER_SERVICE_DB_NAME
              valueFrom:
                configMapKeyRef:
                  name: nacos-cm
                  key: mysql.master.db.name
            - name: MYSQL_MASTER_SERVICE_PORT
              valueFrom:
                configMapKeyRef:
                  name: nacos-cm
                  key: mysql.master.port
            - name: MYSQL_SLAVE_SERVICE_PORT
              valueFrom:
                configMapKeyRef:
                  name: nacos-cm
                  key: mysql.slave.port
            - name: MYSQL_MASTER_SERVICE_USER
              valueFrom:
                configMapKeyRef:
                  name: nacos-cm
                  key: mysql.master.user
            - name: MYSQL_MASTER_SERVICE_PASSWORD
              valueFrom:
                configMapKeyRef:
                  name: nacos-cm
                  key: mysql.master.password
            - name: NACOS_SERVER_PORT
              value: "8848"
            - name: PREFER_HOST_MODE
              value: "hostname"
          readinessProbe:
            httpGet:
              port: client-port
              path: /nacos/v1/console/health/readiness
            initialDelaySeconds: 60
            timeoutSeconds: 3
          livenessProbe:
            httpGet:
              port: client-port
              path: /nacos/v1/console/health/liveness
            initialDelaySeconds: 60
            timeoutSeconds: 3
          volumeMounts:
            - name: plugindir
              mountPath: /home/nacos/plugins/peer-finder
            - name: datadir
              mountPath: /home/nacos/data
            - name: logdir
              mountPath: /home/nacos/logs
  volumeClaimTemplates:
    - metadata:
        name: plugindir
        annotations:
          volume.beta.kubernetes.io/storage-class: "managed-nfs-storage"
      spec:
        accessModes: [ "ReadWriteMany" ]
        resources:
          requests:
            storage: 5Gi
    - metadata:
        name: datadir
        annotations:
          volume.beta.kubernetes.io/storage-class: "managed-nfs-storage"
      spec:
        accessModes: [ "ReadWriteMany" ]
        resources:
          requests:
            storage: 5Gi
    - metadata:
        name: logdir
        annotations:
          volume.beta.kubernetes.io/storage-class: "managed-nfs-storage"
      spec:
        accessModes: [ "ReadWriteMany" ]
        resources:
          requests:
            storage: 5Gi
  selector:
    matchLabels:
      app: nacos

查看结果

[root@localhost nacos]# kubectl get pod 
NAME                                           READY   STATUS             RESTARTS   AGE
mysql-master-hnnzq                             1/1     Running            0          43h
mysql-slave-jjq98                              1/1     Running            0          43h
nacos-0                                        1/1     Running            0          41h
nacos-1                                        1/1     Running            0          41h
nacos-2                                        1/1     Running            0          41h
nfs-client-provisioner-57c8c85896-cpxtx        1/1     Running            0          45h

[root@localhost nacos]# kubectl get svc
NAME                               TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)     AGE
kubernetes                         ClusterIP   172.21.0.1              443/TCP     9d
mysql-master                       ClusterIP   172.21.12.11            3306/TCP    43h
mysql-slave                        ClusterIP   172.21.1.9              3306/TCP    43h
nacos-headless                     ClusterIP   172.21.11.220           8848/TCP    41h
nginx-svc                          ClusterIP   172.21.1.104            10080/TCP   8d

[root@localhost nacos]# kubectl get storageclass
NAME                       PROVISIONER      AGE
alicloud-disk-available    alicloud/disk    9d
alicloud-disk-efficiency   alicloud/disk    9d
alicloud-disk-essd         alicloud/disk    9d
alicloud-disk-ssd          alicloud/disk    9d
managed-nfs-storage        fuseim.pri/ifs   45h

[root@localhost nacos]# kubectl get pv,pvc
NAME                                                        CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM                       STORAGECLASS          REASON   AGE
persistentvolume/pvc-c920f9cf-f56f-11e9-90dc-da6119823c38   5Gi        RWX            Delete           Bound    default/datadir-nacos-0     managed-nfs-storage            43h
persistentvolume/pvc-c921977d-f56f-11e9-90dc-da6119823c38   5Gi        RWX            Delete           Bound    default/logdir-nacos-0      managed-nfs-storage            43h
persistentvolume/pvc-c922401f-f56f-11e9-90dc-da6119823c38   5Gi        RWX            Delete           Bound    default/plugindir-nacos-0   managed-nfs-storage            43h
persistentvolume/pvc-db3ccda6-f56f-11e9-90dc-da6119823c38   5Gi        RWX            Delete           Bound    default/datadir-nacos-1     managed-nfs-storage            43h
persistentvolume/pvc-db3dc25a-f56f-11e9-90dc-da6119823c38   5Gi        RWX            Delete           Bound    default/logdir-nacos-1      managed-nfs-storage            43h
persistentvolume/pvc-db3eb86c-f56f-11e9-90dc-da6119823c38   5Gi        RWX            Delete           Bound    default/plugindir-nacos-1   managed-nfs-storage            43h
persistentvolume/pvc-fa47ae6e-f57a-11e9-90dc-da6119823c38   5Gi        RWX            Delete           Bound    default/logdir-nacos-2      managed-nfs-storage            41h
persistentvolume/pvc-fa489723-f57a-11e9-90dc-da6119823c38   5Gi        RWX            Delete           Bound    default/plugindir-nacos-2   managed-nfs-storage            41h
persistentvolume/pvc-fa494137-f57a-11e9-90dc-da6119823c38   5Gi        RWX            Delete           Bound    default/datadir-nacos-2     managed-nfs-storage            41h

NAME                                      STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS          AGE
persistentvolumeclaim/datadir-nacos-0     Bound    pvc-c920f9cf-f56f-11e9-90dc-da6119823c38   5Gi        RWX            managed-nfs-storage   43h
persistentvolumeclaim/datadir-nacos-1     Bound    pvc-db3ccda6-f56f-11e9-90dc-da6119823c38   5Gi        RWX            managed-nfs-storage   43h
persistentvolumeclaim/datadir-nacos-2     Bound    pvc-fa494137-f57a-11e9-90dc-da6119823c38   5Gi        RWX            managed-nfs-storage   41h
persistentvolumeclaim/logdir-nacos-0      Bound    pvc-c921977d-f56f-11e9-90dc-da6119823c38   5Gi        RWX            managed-nfs-storage   43h
persistentvolumeclaim/logdir-nacos-1      Bound    pvc-db3dc25a-f56f-11e9-90dc-da6119823c38   5Gi        RWX            managed-nfs-storage   43h
persistentvolumeclaim/logdir-nacos-2      Bound    pvc-fa47ae6e-f57a-11e9-90dc-da6119823c38   5Gi        RWX            managed-nfs-storage   41h
persistentvolumeclaim/plugindir-nacos-0   Bound    pvc-c922401f-f56f-11e9-90dc-da6119823c38   5Gi        RWX            managed-nfs-storage   43h
persistentvolumeclaim/plugindir-nacos-1   Bound    pvc-db3eb86c-f56f-11e9-90dc-da6119823c38   5Gi        RWX            managed-nfs-storage   43h
persistentvolumeclaim/plugindir-nacos-2   Bound    pvc-fa489723-f57a-11e9-90dc-da6119823c38   5Gi        RWX            managed-nfs-storage   41h
[root@localhost nacos]#

然后用ingress映射出去就可以访问8848端口