通过keepalived实现neo4j主备切换

发表于

1.背景：我们使用的是社区版Neo4j不支持集群功能,因此通过对Neo4j进行双写，再通过keepalived实现主备切换

2.环境：Neo4j服务器A(10.23.4.123),Neo4j服务器B(10.23.4.124),VIP(10.23.4.126),服务器均为CentOs

3.安装keepalived

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yum install keepalived

4.修改主机10.23.4.123 keepalived的配置文件/etc/keepalived/keepalived.conf

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global_defs {
    router_id neo4j_master
}
vrrp_script chk_neo4j {
    script "netstat -lntp | grep 7687"
    interval 1
}

vrrp_instance neo4j {
    state BACKUP
    interface ens160
    lvs_sync_daemon_interface ens160
    virtual_router_id 210
    priority 150
    nopreempt
    advert_int 1

    authentication {
        auth_type PASS
        auth_pass 1111
    }

    virtual_ipaddress {
        10.23.4.126
    }

    track_script {
        chk_neo4j
    }
}

5.修改主机10.23.4.124 keepalived的配置文件/etc/keepalived/keepalived.conf

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global_defs {
    router_id neo4j_slave
}
vrrp_script chk_neo4j {
    script "netstat -lntp | grep 7687"
    interval 1
}

vrrp_instance neo4j {
    state BACKUP
    interface ens160
    lvs_sync_daemon_interface ens160
    virtual_router_id 210
    priority 150
    nopreempt
    advert_int 1

    authentication {
        auth_type PASS
        auth_pass 1111
    }

    virtual_ipaddress {
        10.23.4.126
    }

    track_script {
        chk_neo4j
    }
}

6.启动keepalived

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systemctl enable  keepalived.service
systemctl start  keepalived.service

7.验证

  • 停止Neo4j-A,在Neo4j-B通过命令ip a查看VIP是否飘到Neo4j-B上
  • 停止Neo4j-B,在Neo4j-A通过命令ip a查看VIP是否飘到Neo4j-A上

未完