Neo4j 图形数据库部署

一.前言

1.1 简介

Neo4j是一个高性能的,NOSQL图形数据库，它将结构化数据存储在网络上而不是表中。它是一个嵌入式的、基于磁盘的、具备完全的事务特性的Java持久化引擎，但是它将结构化数据存储在网络(从数学角度叫做图)上而不是表中。Neo4j也可以被看作是一个高性能的图引擎，该引擎具有成熟数据库的所有特性。程序员工作在一个面向对象的、灵活的网络结构下而不是严格、静态的表中——但是他们可以享受到具备完全的事务特性、企业级的数据库的所有好处。

二.安装配置

2.1 部署master节点

master使用sts部署

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: neo4j-core
  namespace: neo4j
  labels:
    app: neo4j-core
spec:
  replicas: 2 
  selector:
    matchLabels:
      app: neo4j-core
  serviceName: neo4j-core
  template:
    metadata:
      labels:
        app: neo4j-core
    spec:
      containers:
      - name: neo4j-core
        image: neo4j:3.5.5-enterprise   # 官方镜像，3.5.5企业版
        imagePullPolicy: IfNotPresent
        env:    # 这里通过env，配置镜像环境参数，这是因为此镜像是通过这样来进行配置参数的
          - name: NEO4J_ACCEPT_LICENSE_AGREEMENT    # 接受证书协议，必须的
            value: "yes"
          - name: NEO4J_dbms_connectors_default__advertised__address  # 指定自身pod的ip地址，默认为localhost，在集群中必须注明自身地址，这里直接用ip
            valueFrom:
              fieldRef:
                fieldPath: status.podIP
          - name: NEO4J_dbms_mode  # 节点的模式，选择CORE，就是核心节点
            value: "CORE"
          - name: NEO4J_AUTH   # 一定要自定义初始验证的用户名/密码
            value: "neo4j/*******"
          - name: NEO4J_causal__clustering_minimum__core__cluster__size__at__formation
            value: "2"
          - name: NEO4J_causal__clustering_minimum__core__cluster__size__at__runtime
            value: "2"
          - name: NEO4J_causal__clustering_discovery__type  # 默认集群发现方式为LIST，这里写不写都行
            value: "LIST"
          - name: NEO4J_causal__clustering_initial__discovery__members  # 手动写明集群中所有成员的ip:port，5000端口为集群发现端口
            value: "neo4j-core-0.neo4j.svc.cluster.local:5000,neo4j-core-1.neo4j.svc.cluster.local:5000"
          - name: NEO4J_causal__clustering_discovery__advertised__address  # 下面这三个必须定义，为节点自身的ip:port，相当于节点自身的名称，因为默认是会用自身hostname，但是在k8s中，无法单单通过hostname解析到ip地址，这样定义的自身地址会无法识别
            value: $(NEO4J_dbms_connectors_default__advertised__address):5000
          - name: NEO4J_causalClustering_transactionAdvertisedAddress
            value: $(NEO4J_dbms_connectors_default__advertised__address):6000
          - name: NEO4J_causalClustering_raftAdvertisedAddress
            value: $(NEO4J_dbms_connectors_default__advertised__address):7000
        volumeMounts:
        - name: neo4j-core    
          mountPath: /data/neo4j
  volumeClaimTemplates:     
  - metadata:
      creationTimestamp: null
      name: neo4j-core
    spec:
      accessModes:
      - ReadWriteOnce
      resources:
        requests:
          storage: 50Gi
      storageClassName: ceph-storageclass
      volumeMode: Filesystem

master节点svc

apiVersion: v1
kind: Service
metadata:
  name: neo4j-core
  namespace: neo4j
spec:
  selector:
    app: neo4j-core
  type: NodePort    
  ports:
    - protocol: TCP
      name: http
      port: 7474
      nodePort: 31474
      targetPort: 7474
    - protocol: TCP
      name: blot
      port: 7687
      nodePort: 31687
      targetPort: 7687

2.2 部署slave节点

slave使用deploy部署

apiVersion: apps/v1
kind: Deployment
metadata:
  name: neorj-read-replica
  namespace: neo4j
  labels:
    app: neorj-read-replica
spec:
  replicas: 2
  selector:
    matchLabels:
      app: neorj-read-replica
  template:
    metadata:
      labels:
        app: neorj-read-replica
    spec:
      containers:
      - name: neorj-read-replica
        image: neo4j:3.5.5-enterprise
        imagePullPolicy: IfNotPresent
        env:
          - name: NEO4J_ACCEPT_LICENSE_AGREEMENT
            value: "yes"
          - name: NEO4J_dbms_connectors_default__advertised__address
            valueFrom:
              fieldRef:
                fieldPath: status.podIP
          - name: NEO4J_dbms_mode   # 指定模式为只读节点模式
            value: "READ_REPLICA"
          - name: NEO4J_AUTH
            value: "neo4j/*******"   
          - name: NEO4J_causal__clustering_discovery__type
            value: "LIST"
          - name: NEO4J_causal__clustering_initial__discovery__members
            value: "neo4j-core-0.neo4j.svc.cluster.local:5000,neo4j-core-1.neo4j.svc.cluster.local:5000"

slave svc

apiVersion: v1
kind: Service
metadata:
  name: neorj-read-replica
  namespace: neo4j
spec:
  selector:
    app: neorj-read-replica
  ports:
  - protocol: TCP
    port: 7687
    targetPort: 7687

创建namespace并部署

kubectl create ns neo4j
kubectl apply -f .

2.3 web页面访问