neo4j因果集群搭建+自定义策略

最新推荐文章于 2025-10-14 00:15:56 发布

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该博客介绍了如何使用Docker Compose在Host模式下搭建Neo4j集群，包括三个核心节点c1、c2和c3，详细配置了环境变量以实现集群的初始化和通信。同时，博客提到了自定义策略代码，用于读服务时的节点选择策略，并提供了Spring Data Neo4j的配置示例，根据不同的policy（test和zhen）进行路由选择。

docker compose 搭建

集群部分节点网络采用 host模式。

version: '3.4'
services:

  c1:
    image: neo4j:3.4.15-enterprise
    container_name: "c1"
    network_mode: "host" 
    environment:
      - NEO4J_ACCEPT_LICENSE_AGREEMENT=yes
      - NEO4J_dbms_mode=CORE
      - NEO4J_causal__clustering_minimum__core__cluster__size__at__formation=3
      - NEO4J_causal__clustering_minimum__core__cluster__size__at__runtime=3 
      - NEO4J_causal__clustering_initial__discovery__members=10.202.228.39:15000,10.202.228.39:25000,10.202.228.39:45000
      - NEO4J_causal__clustering_discovery__advertised__address=10.202.228.39:15000
      - NEO4J_causal__clustering_transaction__advertised__address=10.202.228.39:16000
      - NEO4J_causal__clustering_raft__advertised__address=10.202.228.39:17000
      - NEO4J_causal__clustering_discovery__listen__address=0.0.0.0:15000
      - NEO4J_causal__clustering_transaction__listen__address=0.0.0.0:16000
      - NEO4J_causal__clustering_raft__listen__address=0.0.0.0:17000
      - NEO4J_dbms_connector_bolt_advertised__address=10.202.228.39:17687
      - NEO4J_dbms_connector_http_advertised__address=10.202.228.39:17474
      - NEO4J_dbms_connector_https_advertised__address=10.202.228.39:17473
      - NEO4J_dbms_connector_bolt_enabled=true
      - NEO4J_dbms_connector_bolt_listen__address=0.0.0.0:17687
      - NEO4J_dbms_connector_http_listen__address=0.0.0.0:17474
      - NEO4J_dbms_connector_https_listen__address=0.0.0.0:17473
      - NEO4J_dbms_connector_https_enabled=true
      - NEO4J_dbms_backup_address=0.0.0.0:16362
      - NEO4J_dbms_connectors_default__advertised__address=10.202.228.39
      - NEO4J_dbms_connectors_default__listen__address=0.0.0.0
      - NEO4J_causal__clustering_server__groups=test  # 定义组为test
      - NEO4J_causal__clustering_multi__dc__license=true
      - NEO4J_causal__clustering_load__balancing_config_server__policies_test=\groups(test); # 但没有policy为test的策略时，读方式访问所有读服务
      - NEO4J_causal__clustering_load__balancing_config_server__policies_zhen=\groups(zhen); # 但没有policy为zhen的策略时，读方式访问所有读服务


  c2:
    image: neo4j:3.4.15-enterprise
    container_name: "c2"
    ports:
      - "27474:7474"
      - "27687:7687"
      - "25000:5000"
      - "26000:6000"
      - "27000:7000"
      - "27473:7473"
      - "26362:6362"
    environment:
      - NEO4J_ACCEPT_LICENSE_AGREEMENT=yes
      - NEO4J_dbms_mode=CORE
      - NEO4J_causal__clustering_minimum__core__cluster__size__at__formation=3
      - NEO4J_causal__clustering_minimum__core__cluster__size__at__runtime=3 
      - NEO4J_causal__clustering_initial__discovery__members=10.202.228.39:15000,10.202.228.39:25000,10.202.228.39:45000
      - NEO4J_causal__clustering_discovery__listen__address=0.0.0.0:5000
      - NEO4J_causal__clustering_transaction__listen__address=0.0.0.0:6000
      - NEO4J_causal__clustering_raft__listen__address=0.0.0.0:7000
      - NEO4J_causal__clustering_discovery__advertised__address=10.202.228.39:25000
      - NEO4J_causal__clustering_transaction__advertised__address=10.202.228.39:26000
      - NEO4J_causal__clustering_raft__advertised__address=10.202.228.39:27000
      - NEO4J_dbms_connector_bolt_enabled=true
      - NEO4J_dbms_connector_bolt_advertised__address=10.202.228.39:27687
      - NEO4J_dbms_connector_http_advertised__address=10.202.228.39:27474
      - NEO4J_dbms_connector_https_advertised__address=10.202.228.39:27473
      - NEO4J_dbms_connector_bolt_listen__address=0.0.0.0:7687
      - NEO4J_dbms_connector_http_listen__address=0.0.0.0:7474
      - NEO4J_dbms_connector_https_listen__address=0.0.0.0:7473
      - NEO4J_dbms_connector_https_enabled=true
      - NEO4J_dbms_backup_address=0.0.0.0:6362
      - NEO4J_dbms_connectors_default__advertised__address=10.202.228.39
      - NEO4J_dbms_connectors_default__listen__address=0.0.0.0
      - NEO4J_causal__clustering_server__groups=test
      - NEO4J_causal__clustering_multi__dc__license=true
      - NEO4J_causal__clustering_load__balancing_config_server__policies_test=\groups(test);
      - NEO4J_causal__clustering_load__balancing_config_server__policies_zhen=\groups(zhen);

  c3:
    image: neo4j:3.4.15-enterprise
    container_name: "c3"
    ports:
      - "47474:7474"
      - "47687:7687"
      - "45000:5000"
      - "46000:6000"
      - "47000:7000"
      - "47473:7473"
      - "46362:6362"
    environment:
      - NEO4J_ACCEPT_LICENSE_AGREEMENT=yes
      - NEO4J_dbms_mode=CORE
      - NEO4J_causal__clustering_minimum__core__cluster__size__at__formation=3
      - NEO4J_causal__clustering_minimum__core__cluster__size__at__runtime=3 
      - NEO4J_causal__clustering_initial__discovery__members=10.202.228.39:15000,10.202.228.39:25000,10.202.228.39:45000
      - NEO4J_causal__clustering_discovery__listen__address=0.0.0.0:5000
      - NEO4J_causal__clustering_transaction__listen__address=0.0.0.0:6000
      - NEO4J_causal__clustering_raft__listen__address=0.0.0.0:7000
      - NEO4J_causal__clustering_discovery__advertised__address=10.202.228.39:45000
      - NEO4J_causal__clustering_transaction__advertised__address=10.202.228.39:46000
      - NEO4J_causal__clustering_raft__advertised__address=10.202.228.39:47000
      - NEO4J_dbms_connector_bolt_enabled=true
      - NEO4J_dbms_connector_bolt_advertised__address=10.202.228.39:47687
      - NEO4J_dbms_connector_http_advertised__address=10.202.228.39:47474
      - NEO4J_dbms_connector_https_advertised__address=10.202.228.39:47473
      - NEO4J_dbms_connector_bolt_listen__address=0.0.0.0:7687
      - NEO4J_dbms_connector_http_listen__address=0.0.0.0:7474
      - NEO4J_dbms_connector_https_listen__address=0.0.0.0:7473
      - NEO4J_dbms_connector_https_enabled=true
      - NEO4J_dbms_backup_address=0.0.0.0:6362
      - NEO4J_dbms_connectors_default__advertised__address=10.202.228.39
      - NEO4J_dbms_connectors_default__listen__address=0.0.0.0
      - NEO4J_causal__clustering_load__balancing_plugin=server_policies
      - NEO4J_causal__clustering_server__groups=zhen
      - NEO4J_causal__clustering_multi__dc__license=true
      - NEO4J_causal__clustering_load__balancing_config_server__policies_test=\groups(test);
      - NEO4J_causal__clustering_load__balancing_config_server__policies_zhen=\groups(zhen);

其中自定义策略代码:

- NEO4J_causal__clustering_load__balancing_plugin=server_policies
- NEO4J_causal__clustering_server__groups=zhen
- NEO4J_causal__clustering_multi__dc__license=true
- NEO4J_causal__clustering_load__balancing_config_server__policies_test=\groups(test);
- NEO4J_causal__clustering_load__balancing_config_server__policies_zhen=\groups(zhen);

spring data neo4j 配置

服务A policy为zhen

bolt+routing://10.202.228.39:17687?policy=zhen,bolt+routing://10.202.228.39:27687?policy=zhen,bolt+routing://10.202.228.39:47687?policy=zhen

服务B policy为test

bolt+routing://10.202.228.39:17687?policy=test,bolt+routing://10.202.228.39:27687?policy=test,bolt+routing://10.202.228.39:47687?policy=test

policy 说明：

-NEO4J_causal__clustering_load__balancing_config_server__policies_zhen=\groups(zhen);
读服务时，优先查询组为"zhen"的节点中一个节点，没有查到组为“zhen”的节点，则查所有节点中一个节点

路由检测方法：

dbms.cluster.routing.getRoutingTable({policy: “zhen”})