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云原生之容器编排实践-ruoyi-cloud项目部署到K8S:Nacosv2.2.3

目录[-]

背景

前面搭建好了 Kubernetes 集群与私有镜像仓库,终于要进入服务编排的实践环节了。本系列拿 ruoyi-cloud 项目进行练手,按照 MySQLNacosRedisNginxGatewayAuthSystem 的顺序来部署 ruoyi-cloud 微服务应用。

部署一个服务前,需要明确它是有状态服务还是无状态服务,这里 MySQLNacosRedisNginx 当做有状态服务(StatefulSet)来部署;而 GatewayAuthSystem 这些微服务作为无状态服务(Deployment)来部署。

这一次对全部服务采用 YAML 文件的方式来进行部署,这有助于理解K8S组织管理资源的风格,后续我们可以借助开源的容器平台,eg: KubeSphere 来进行可视化的服务部署。不过,手动编写 YAML 文件有一个问题,那就是当面对较多的微服务时,工作量较大,基本成了体力活;有个好消息是,我们可以使用 Kubernetes 官方提供的 kompose 工具,实现对 dokcer-composeyamlK8Syaml 的转换。

另外,为了保证后续在实际生产环境下各组件的稳定与可靠,我们限定了所有基础镜像的版本。

虚机资源

共用到了三台虚机,1台作为 Master 节点,2台 Worker 节点。

主机名 IP 说明
k8s-master 172.16.201.25 主节点
k8s-node1 172.16.201.26 工作节点
k8s-node2 172.16.201.27 工作节点
[root@k8s-master ~]# kubectl get nodes
NAME         STATUS   ROLES                  AGE   VERSION
k8s-master   Ready    control-plane,master   37h   v1.20.9
k8s-node1    Ready    <none>                 35h   v1.20.9
k8s-node2    Ready    <none>                 35h   v1.20.9

系统环境

[root@k8s-master ~]# uname -a
Linux k8s-master 3.10.0-1160.71.1.el7.x86_64 #1 SMP Tue Jun 28 15:37:28 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
[root@k8s-master ~]# cat /proc/version 
Linux version 3.10.0-1160.71.1.el7.x86_64 (mockbuild@kbuilder.bsys.centos.org) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-44) (GCC) ) #1 SMP Tue Jun 28 15:37:28 UTC 2022
[root@k8s-master ~]# cat /etc/redhat-release
CentOS Linux release 7.9.2009 (Core)

部署示意

2024-03-02-K8SNacos.jpg

YAML转换

ruoyi-cloud 项目本身提供了一个使用 docker-compose 部署的配置文件以及所有依赖服务镜像的构建脚本,是在项目根目录的 docker 目录下,可参考Docker容器化部署若依微服务ruoyi-cloud项目

先将这个 docker 目录上传到 Kubernetes 的主节点,然后使用 komposedokcer-composeyaml 转换为 K8Syaml

curl -L https://github.com/kubernetes/kompose/releases/download/v1.26.0/kompose-linux-amd64 -o kompose
chmod +x kompose
mv ./kompose /usr/local/bin/kompose
[root@k8s-master docker]# cd /opt/docker
[root@k8s-master docker]# kompose convert

对于自动转换后的 YAML ,我们做简单的修改后即可应用部署。下面是 NacosYAML 配置文件(做了合并和微调)。

apiVersion: v1
kind: PersistentVolume
metadata:
  name: ruoyi-nacos-data-pv
  labels:
    pv: ruoyi-nacos-data-pv
spec:
  capacity: 
    storage: 5Gi
  accessModes:
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Retain
  storageClassName: local-storage
  local:
    path: /data/nacos/data
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: kubernetes.io/hostname
          operator: In
          values:
          - k8s-node1

---

apiVersion: v1
kind: PersistentVolume
metadata:
  name: ruoyi-nacos-log-pv
  labels:
    pv: ruoyi-nacos-log-pv
spec:
  capacity: 
    storage: 5Gi
  accessModes:
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Retain
  storageClassName: local-storage
  local:
    path: /data/nacos/log
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: kubernetes.io/hostname
          operator: In
          values:
          - k8s-node1

---

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: ruoyi-nacos-data-pvc
  namespace: ruoyi-basic
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 200Mi
  storageClassName: local-storage
  selector:
    matchLabels:
      pv: ruoyi-nacos-data-pv

---

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: ruoyi-nacos-log-pvc
  namespace: ruoyi-basic
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 200Mi
  storageClassName: local-storage
  selector:
    matchLabels:
      pv: ruoyi-nacos-log-pv

---

apiVersion: v1
kind: ConfigMap
metadata:
  name: ruoyi-nacos-configmap
  namespace: ruoyi-basic
data:
  application.properties: |
    spring.datasource.platform=mysql
    db.num=1
    db.url.0=jdbc:mysql://ruoyi-mysql.ruoyi-basic:3306/ruoyi-config?characterEncoding=utf8&connectTimeout=20000&socketTimeout=3000&autoReconnect=true&useUnicode=true&useSSL=false&serverTimezone=UTC
    db.user=root
    db.password=you-guess

    nacos.naming.empty-service.auto-clean=true
    nacos.naming.empty-service.clean.initial-delay-ms=50000
    nacos.naming.empty-service.clean.period-time-ms=30000

    management.endpoints.web.exposure.include=*
    management.metrics.export.elastic.enabled=false
    management.metrics.export.influx.enabled=false

    server.tomcat.accesslog.enabled=true
    server.tomcat.accesslog.pattern=%h %l %u %t "%r" %s %b %D %{User-Agent}i %{Request-Source}i
    server.tomcat.basedir=/home/ruoyi/nacos/tomcat/logs

    nacos.security.ignore.urls=/,/error,/**/*.css,/**/*.js,/**/*.html,/**/*.map,/**/*.svg,/**/*.png,/**/*.ico,/console-ui/public/**,/v1/auth/**,/v1/console/health/**,/actuator/**,/v1/console/server/**

    nacos.core.auth.system.type=nacos
    nacos.core.auth.enabled=true
    nacos.core.auth.plugin.nacos.token.expire.seconds=18000
    nacos.core.auth.plugin.nacos.token.secret.key=SecretKey012345678901234567890123456789012345678901234567890123456789
    nacos.core.auth.caching.enabled=true
    nacos.core.auth.enable.userAgentAuthWhite=false
    nacos.core.auth.server.identity.key=serverIdentity
    nacos.core.auth.server.identity.value=security

    nacos.istio.mcp.server.enabled=false

Note:

  1. 这里使用 local-storageStorageClass ,并使用本地磁盘的方式创建使用 PV ,实际建议使用 NFS
  2. 安全起见,生产环境务必设置nacos.core.auth.enabled=true,并且修改上面的nacos.core.auth.plugin.nacos.token.secret.key值。
apiVersion: apps/v1
kind: StatefulSet
metadata:
  annotations:
    kompose.cmd: kompose convert
    kompose.version: 1.26.0 (40646f47)
  labels:
    io.kompose.service: ruoyi-nacos
  name: ruoyi-nacos
  namespace: ruoyi-basic
spec:
  serviceName: ruoyi-nacos
  replicas: 1
  selector:
    matchLabels:
      io.kompose.service: ruoyi-nacos
  template:
    metadata:
      annotations:
        kompose.cmd: kompose convert
        kompose.version: 1.26.0 (40646f47)
      labels:
        io.kompose.service: ruoyi-nacos
    spec:
      containers:
        - env:
            - name: MODE
              value: standalone
          image: nacos/nacos-server:v2.2.3
          name: ruoyi-nacos
          ports:
            - containerPort: 8848
            - containerPort: 9848
            - containerPort: 9849
          volumeMounts:
            - mountPath: /home/nacos/data
              name: ruoyi-nacos-data-pvc
            - mountPath: /home/nacos/logs
              name: ruoyi-nacos-log-pvc
            - mountPath: /home/nacos/conf/application.properties
              name: ruoyi-nacos-config
              subPath: application.properties
      restartPolicy: Always
      volumes:
        - name: ruoyi-nacos-data-pvc
          persistentVolumeClaim:
            claimName: ruoyi-nacos-data-pvc      
        - name: ruoyi-nacos-log-pvc
          persistentVolumeClaim:
            claimName: ruoyi-nacos-log-pvc
        - name: ruoyi-nacos-config
          configMap:
            name: ruoyi-nacos-configmap
            items:
              - key: application.properties
                path: application.properties
            defaultMode: 420
apiVersion: v1
kind: Service
metadata:
  annotations:
    kompose.cmd: kompose convert
    kompose.version: 1.26.0 (40646f47)
  labels:
    io.kompose.service: ruoyi-nacos
  name: ruoyi-nacos
  namespace: ruoyi-basic
spec:
  ports:
    - name: "8848"
      port: 8848
      targetPort: 8848
      nodePort: 30848
    - name: "9848"
      port: 9848
      targetPort: 9848
    - name: "9849"
      port: 9849
      targetPort: 9849
  selector:
    io.kompose.service: ruoyi-nacos
  type: NodePort

部署Nacos

Note:与 MySQL 使用相同的 NameSpaceStorageClass

# 创建PV、PVC、CM
[root@k8s-master nacos]# kubectl apply -f ruoyi-nacos-pv-pvc-cm.yaml

# 部署Nacos
[root@k8s-master nacos]# kubectl apply -f ruoyi-nacos-statefulset.yaml

# 创建Nacos服务
[root@k8s-master nacos]# kubectl apply -f ruoyi-nacos-service.yaml

# 获取配置信息
[root@k8s-master nacos]# kubectl get cm -n ruoyi-basic
NAME                   DATA   AGE
kube-root-ca.crt       1      25h
ruoyi-mysql-configmap   1      25h
ruoyi-nacos-configmap   1      14h

# 查看所有Pod,Nacos就绪
[root@k8s-master nacos]# kubectl get pod -A
NAMESPACE              NAME                                         READY   STATUS    RESTARTS   AGE
default                busybox                                      1/1     Running   446        18d
docker-registry        docker-registry-9bc898786-l477q              1/1     Running   2          19d
kube-system            calico-kube-controllers-577f77cb5c-hv29w     1/1     Running   3          22d
kube-system            calico-node-4fkrs                            1/1     Running   2          22d
kube-system            calico-node-d4tqq                            1/1     Running   3          22d
kube-system            calico-node-sdmm6                            1/1     Running   6          22d
kube-system            coredns-9545f45dc-tf9wd                      1/1     Running   1          18d
kube-system            etcd-k8s-master                              1/1     Running   10         24d
kube-system            kube-apiserver-k8s-master                    1/1     Running   10         24d
kube-system            kube-controller-manager-k8s-master           1/1     Running   10         24d
kube-system            kube-proxy-4789z                             1/1     Running   2          24d
kube-system            kube-proxy-7mt7k                             1/1     Running   6          24d
kube-system            kube-proxy-lqtpz                             1/1     Running   3          24d
kube-system            kube-scheduler-k8s-master                    1/1     Running   11         24d
kubernetes-dashboard   dashboard-metrics-scraper-79c5968bdc-j9bnv   1/1     Running   3          22d
kubernetes-dashboard   kubernetes-dashboard-658485d5c7-pq7z8        1/1     Running   2          22d
ruoyi-basic             ruoyi-mysql-8c779d94c-b7r9n                   1/1     Running   1          18d
ruoyi-basic             ruoyi-nacos-0                                 1/1     Running   1          18d

# 查看Nacos详细信息
[root@k8s-master nacos]# kubectl describe pod/ruoyi-nacos-0 -n ruoyi-basic

# 查看Nacos日志
[root@k8s-master nacos]# kubectl logs -f pod/ruoyi-nacos-0 -n ruoyi-basic

# Nacos对外暴露了端口,用于测试
[root@k8s-master nacos]# kubectl get svc -n ruoyi-basic -o wide
NAME         TYPE       CLUSTER-IP      EXTERNAL-IP   PORT(S)                                        AGE   SELECTOR
ruoyi-mysql   NodePort   10.96.58.67     <none>        3306:30306/TCP                                 24h   io.kompose.service=ruoyi-mysql
ruoyi-nacos   NodePort   10.96.31.220    <none>        8848:30848/TCP,9848:31623/TCP,9849:30012/TCP   13h   io.kompose.service=ruoyi-nacos

验证Nacos服务

由于暴露了服务端口 30848 ,直接通过远程浏览器访问验证 Nacos 是否部署成功。

2024-03-02-Nacos.jpg

部署与重建

可以通过设置副本数为0实现关停 Nacos 服务。

# 删除Nacos
[root@k8s-master nacos]# kubectl scale --replicas=0 statefulset mine-nacos -n mine-basic
statefulset.apps/mine-nacos scaled

# 启动
[root@k8s-master nacos]# kubectl scale --replicas=1 statefulset mine-nacos -n mine-basic
statefulset.apps/mine-nacos scaled

小总结

这次我们先是借助 kompose 工具,实现对 dokcer-composeyamlK8Syaml 的转换,经过简单的加工后即可应用部署;通过以上操作,成功将 Nacos v2.2.3 部署到了 K8S 集群,下一步我们安装下 Redis 7.2.3

Reference


If you have any questions or any bugs are found, please feel free to contact me.

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