Mongodb3.4.7搭建高可用集群

Posted 2020-10-06 原地没有风

部署Mongodb高可用集群

准备

按照官方说明，至少需要3个config server，2个mongos，2个shard，每个shard至少2个副本，就是4个shard，共需要9个Mongodb实例。这里只虚拟出2个机器节点，将不同的Mongodb实例部署在不同的端口上模拟实现。

节点端口关系表

config server	leo.zhi.1:10010,leo.zhi.2:10010
mongos server	leo.zhi.1:10020,leo.zhi.2:10020
shard server	leo.zhi.1:10001,leo.zhi.2:10002

leo.zhi.1和leo.zhi.2上分别创建文件夹

[[email protected] mongodb]# mkdir -p config/data
[[email protected] mongodb]# mkdir -p config/log
[[email protected] mongodb]# mkdir -p mongos/log
[[email protected] mongodb]# mkdir -p shard1/data
[[email protected] mongodb]# mkdir -p shard1/log
[[email protected] mongodb]# mkdir -p shard2/data
[[email protected] mongodb]# mkdir -p shard2/log

 其中data目录存放数据，log目录存放日志

mongos服务不存放数据，所以不需要数据目录，只需要log目录

部署config server

Mongodb配置文件（采用YAML格式书写）

systemLog:
  destination: file
  path: "/usr/local/mongodb/config/log/mongod.log"
  logAppend: true
storage:
  dbPath: "/usr/local/mongodb/config/data"
  journal:
    enabled: true
  directoryPerDB: true
net:
  port: 10010
processManagement:
  fork: true
  pidFilePath: "/usr/local/mongodb/config/mongod.pid"
sharding:
  clusterRole: configsvr
replication:
  replSetName: configReplSet

1. 在每台服务器上分别启Mongodb实例

[[email protected] mongodb]# mongod --config config/mongod.conf 
about to fork child process, waiting until server is ready for connections.
forked process: 3293
child process started successfully, parent exiting

 2. 随便选个一个节点，登录mongo，初始化config server 的 replica set

[[email protected] mongodb]# mongo --port 10010
> rs.initiate( { _id: "configReplSet", configsvr: true, members:[ {_id:0,host:"leo.zhi.1:10010"}, {_id:1,host:"leo.zhi.2:10010"}] } )
...
configReplSet:OTHER> exit
[[email protected] mongodb]# mongo --port 10010
configReplSet:PRIMARY> 

 部署shard1

Mongodb配置文件（采用YAML格式书写）

systemLog:
  destination: file
  path: "/usr/local/mongodb/shard1/log/mongod.log"
  logAppend: true
storage:
  dbPath: "/usr/local/mongodb/shard1/data"
  journal:
    enabled: true
  directoryPerDB: true
net:
  port: 10001
processManagement:
  fork: true
  pidFilePath: "/usr/local/mongodb/shard1/mongod.pid"
sharding:
  clusterRole: shardsvr
replication:
  replSetName: shard1ReplSet

1. 在每个节点启动shard1

[[email protected] mongodb]# mongod --config shard1/mongod.conf 

 2. 随便选个一个节点，登录mongo，初始化shard1 的 replica set

[[email protected] mongodb]# mongo --port 10001
> rs.initiate( { _id: "shard1ReplSet", members:[ {_id:0,host:"leo.zhi.1:10001"}, {_id:1,host:"leo.zhi.2:10002"}] } )
...
shard1ReplSet:OTHER> exit
[[email protected] mongodb]# mongo --port 10001
shard1ReplSet:PRIMARY> 

 

部署shard2

Mongodb配置文件（采用YAML格式书写）

systemLog:
  destination: file
  path: "/usr/local/mongodb/shard2/log/mongod.log"
  logAppend: true
storage:
  dbPath: "/usr/local/mongodb/shard2/data"
  journal:
    enabled: true
  directoryPerDB: true
net:
  port: 10002
processManagement:
  fork: true
  pidFilePath: "/usr/local/mongodb/shard2/mongod.pid"
sharding:
  clusterRole: shardsvr
replication:
  replSetName: shard2ReplSet

其余操作步骤同部署shard1

部署mongos