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ONgDB集群测试_ongdb和neo4j的关系
作者：繁依Fanyi0 | 2024-04-02 03:51:41
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ongdb和neo4j的关系
ONgDB项目是neo4j企业版的一个开源分支。另外ONgDB的发起组织也在快速更新。目前最新是3.6.0版本，与企业版neo4j-3.6.0版本功能基本一致。目前企业版neo4j已经更新到4.0版本，最大的特点是支持分库操作，ONgDB还不支持分库操作。
群号码：1061594137
一、安装虚拟机
使用VMware虚拟机安装CentOS7，搭建三个节点的集群。
CentOS7是服务器常用的常用的操作系统，一般安装好系统之后JDK8默认就安装了。三台机器用户名均为ongdb，密码123456。虚拟机装好之后继续操作。
1、配置hosts
vim /etc/hosts
# 新增如下内容
192.168.91.128 node-1
192.168.91.129 node-2
192.168.91.130 node-3
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2、配置可打开文件数
vim /etc/security/limits.conf
# 新增如下内容
neo4j soft nofile 40000
neo4j hard nofile 40000
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二、关闭防火墙
# 查看防火墙状态
systemctl status firewalld.service
# 关闭防火墙
systemctl disable firewalld.service
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三、配置互信
1、修改SSH配置文件
vim /etc/ssh/sshd_config
# 找到下列行 去掉注释井号#
RSAAuthentication yes //字面意思..允许RSA认证
PubkeyAuthentication yes //允许公钥认证
AuthorizedKeysFile .ssh/authorized_keys //公钥存放在.ssh/au..文件中
# 保存退出。
# 修改后需要重启ssh
systemctl restart sshd
# 分别在host1，host2和host3上执行上述命令。
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2、生成密码对
ssh-keygen -t rsa
# 直接回车几次，可在默认路径~/.ssh/下生成私钥idrsa公钥idrsa.pub。
# 分别在host1，host2和host3上执行上述命令
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3、 生成authorized_keys
# 将host2、host3的公钥传到host1上。 # 在host2上输入 scp /home/ongdb/.ssh/id_rsa.pub ongdb@host1:~/.ssh/id_rsa.pub.host2 # 在host3上输入 scp /home/ongdb/.ssh/id_rsa.pub ongdb@host1:~/.ssh/id_rsa.pub.host3 # 以上命令目前还需要输入目标机用户密码。 # 在host1上输入 cd ~/.ssh/ ls # 查看idrsa.pub.host2、idrsa.pub.host3是否已经传输过来。 $ cat id_rsa.pub >> authorized_keys $ cat id_rsa.pub.host2 >> authorized_keys $ cat id_rsa.pub.host3 >> authorized_keys # 生成authorized_keys。 # 给authorized_keys修改权限 chmod 644 authorized_keys # 利用scp把该文件传送到host2、host3的.ssh/下 scp authorized_keys hadoop@host2:~/.ssh/ scp authorized_keys hadoop@host3:~/.ssh/
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4、 验证
# 测试在host1下输入
$ssh host2
$exit
$ssh host3
$exit
# 应该都不需要密码。 这三个互联都应该不需要密码。
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四、节点修改密码
节点在启动之后必须要先进shell修改密码，首次进入默认的用户密码都是neo4j。
[ongdb@node-1 ongdb-node-1]$ bin/cypher-shell
username: neo4j
password: *****
Connected to Neo4j 3.5.16 at bolt://localhost:7687 as user neo4j.
Type :help for a list of available commands or :exit to exit the shell.
Note that Cypher queries must end with a semicolon.
neo4j> CALL dbms.changePassword('123456');
0 rows available after 320 ms, consumed after another 2 ms
neo4j>
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五、配置两个CORE节点
ongdb-node-1配置
#***************************************************************** # Network connector configuration #***************************************************************** dbms.connectors.default_listen_address=0.0.0.0 dbms.connectors.default_advertised_address=node-1 # Bolt connector dbms.connector.bolt.enabled=true #dbms.connector.bolt.tls_level=OPTIONAL dbms.connector.bolt.listen_address=:7687 # HTTP Connector. There can be zero or one HTTP connectors. dbms.connector.http.enabled=true dbms.connector.http.listen_address=:7474 # HTTPS Connector. There can be zero or one HTTPS connectors. dbms.connector.https.enabled=true dbms.connector.https.listen_address=:7473 #***************************************************************** # Causal Clustering Configuration #***************************************************************** dbms.mode=CORE causal_clustering.minimum_core_cluster_size_at_formation=2 causal_clustering.minimum_core_cluster_size_at_runtime=2 causal_clustering.initial_discovery_members=node-1:5000,node-2:5001 causal_clustering.discovery_listen_address=:5000 # Remote debugging dbms.jvm.additional=-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005 # algo|apoc|* plugins dbms.security.procedures.unrestricted=algo.*,apoc.*,* apoc.export.file.enabled=true apoc.import.file.enabled=true #******************************************************************** # Prometheus monitor #******************************************************************** # Enable the Prometheus endpoint. Default is 'false'. metrics.prometheus.enabled=true # The default is localhost:2004. metrics.prometheus.endpoint=localhost:2004
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ongdb-node-2配置
#***************************************************************** # Network connector configuration #***************************************************************** dbms.connectors.default_listen_address=0.0.0.0 dbms.connectors.default_advertised_address=node-2 # Bolt connector dbms.connector.bolt.enabled=true #dbms.connector.bolt.tls_level=OPTIONAL dbms.connector.bolt.listen_address=:7687 # HTTP Connector. There can be zero or one HTTP connectors. dbms.connector.http.enabled=true dbms.connector.http.listen_address=:7474 # HTTPS Connector. There can be zero or one HTTPS connectors. dbms.connector.https.enabled=true dbms.connector.https.listen_address=:7473 #***************************************************************** # Causal Clustering Configuration #***************************************************************** dbms.mode=CORE causal_clustering.minimum_core_cluster_size_at_formation=2 causal_clustering.minimum_core_cluster_size_at_runtime=2 causal_clustering.initial_discovery_members=node-1:5000,node-2:5001 causal_clustering.discovery_listen_address=:5000 # Remote debugging dbms.jvm.additional=-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005 # algo|apoc|* plugins dbms.security.procedures.unrestricted=algo.*,apoc.*,* apoc.export.file.enabled=true apoc.import.file.enabled=true #******************************************************************** # Prometheus monitor #******************************************************************** # Enable the Prometheus endpoint. Default is 'false'. metrics.prometheus.enabled=true # The default is localhost:2004. metrics.prometheus.endpoint=localhost:2004
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六、增加一个只读READ_REPLICA节点
ongdb-node-3配置
#***************************************************************** # Network connector configuration #***************************************************************** dbms.connectors.default_listen_address=0.0.0.0 dbms.connectors.default_advertised_address=node-3 # Bolt connector dbms.connector.bolt.enabled=true #dbms.connector.bolt.tls_level=OPTIONAL dbms.connector.bolt.listen_address=:7687 # HTTP Connector. There can be zero or one HTTP connectors. dbms.connector.http.enabled=true dbms.connector.http.listen_address=:7474 # HTTPS Connector. There can be zero or one HTTPS connectors. dbms.connector.https.enabled=true dbms.connector.https.listen_address=:7473 #***************************************************************** # Causal Clustering Configuration #***************************************************************** dbms.mode=READ_REPLICA causal_clustering.minimum_core_cluster_size_at_formation=2 causal_clustering.minimum_core_cluster_size_at_runtime=2 causal_clustering.initial_discovery_members=node-1:5000,node-2:5001,node-3:5002 causal_clustering.discovery_listen_address=:5002 # Remote debugging dbms.jvm.additional=-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005 # algo|apoc|* plugins dbms.security.procedures.unrestricted=algo.*,apoc.*,* apoc.export.file.enabled=true apoc.import.file.enabled=true #******************************************************************** # Prometheus monitor #******************************************************************** # Enable the Prometheus endpoint. Default is 'false'. metrics.prometheus.enabled=true # The default is localhost:2004. metrics.prometheus.endpoint=localhost:2004
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七、检验apoc和algo插件
CALL algo.list()
CALL apoc.config.list()
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八、查看集群成员角色
CALL dbms.cluster.overview()
CALL dbms.cluster.role()
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kill掉节点2，之后再看一下：
九、更多信息
apoc与Neo4j的版本对应关系及下载
algo与Neo4j的版本对应关系及下载
自定义插件包
ONgDB下载 - 本次测试使用的版本3.5.16
相关插件包与配置文件的下载
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