mongodb高可用部署linux

准备三台服务器，部署方案如下：

1、安装mongodb，详细不用说；

2、创建实例分别创建目录config、configServer、shard1、shard2、shard3、logs,分别存放实例配置文件

3、配置服务器实例configServer.conf：

systemLog:
  destination: file
  logAppend: true
  path: /usr/local/server/mongodb/logs/configServer.log
storage:
  dbPath: /usr/local/server/mongodb/configServer/data
  journal:
    enabled: true
  directoryPerDB: true                                             #是否一个库一个文件夹    
  engine: wiredTiger                                               #数据引擎   
  wiredTiger:                                                      #WT引擎配置
    engineConfig:
      cacheSizeGB: 2                                             #设置为4G,默认为物理内存的一半
      directoryForIndexes: true                                  #是否将索引也按数据库名单独存储
      journalCompressor: zlib
    collectionConfig:                                             #表压缩配置
      blockCompressor: zlib
    indexConfig:                                                  #索引配置
      prefixCompression: true
processManagement:	 #进程管理
  fork: true
  pidFilePath: /usr/local/server/mongodb/configServer/mongod.pid
net:
  port: 29004
  bindIp: 0.0.0.0
sharding:
  clusterRole: configsvr
replication:
  replSetName: configReplSet
4、配置路由服务器 mongos.conf

systemLog:
  destination: file
  logAppend: true
  path: /usr/local/server/mongodb/logs/mongos.log
processManagement:	
  fork: true
  pidFilePath: /usr/local/server/mongodb/mongos/mongod.pid
net:
  port: 29005
  bindIp: 0.0.0.0
sharding:
  configdb: configReplSet/192.168.131.8:29004,192.168.131.9:29004,192.168.131.10:29004
5、配置分片服务器shard1、shard2、shard3
配置文件 shard1.conf:

systemLog:
  destination: file
  logAppend: true
  path: /usr/local/server/mongodb/logs/shard1.log
storage:
  dbPath: /usr/local/server/mongodb/shard1/data
  journal:
    enabled: true
  directoryPerDB: true  
  engine: wiredTiger   
  wiredTiger:
    engineConfig:
      cacheSizeGB: 2
      directoryForIndexes: true
      journalCompressor: zlib
    collectionConfig:
      blockCompressor: zlib
    indexConfig:
      prefixCompression: true
processManagement:
  fork: true
  pidFilePath: /usr/local/server/mongodb/shard1/mongod.pid
net:
  port: 29001
  bindIp: 0.0.0.0
replication:
  replSetName: shard1
sharding:
  clusterRole: shardsvr
  archiveMovedChunks: true

配置shard2.conf:

systemLog:
  destination: file
  logAppend: true
  path: /usr/local/server/mongodb/logs/shard2.log
storage:
  dbPath: /usr/local/server/mongodb/shard2/data
  journal:
    enabled: true
  directoryPerDB: true                                             #是否一个库一个文件夹    
  engine: wiredTiger                                               #数据引擎   
  wiredTiger:
    engineConfig:
      cacheSizeGB: 2
      directoryForIndexes: true
      journalCompressor: zlib
    collectionConfig:
      blockCompressor: zlib
    indexConfig:
      prefixCompression: true
processManagement:	 #进程管理
  fork: true
  pidFilePath: /usr/local/server/mongodb/shard2/mongod.pid
net:
  port: 29002
  bindIp: 0.0.0.0
replication:
  replSetName: shard2
sharding:
  clusterRole: shardsvr
  archiveMovedChunks: true

配置shard3.conf:

systemLog:
  destination: file
  logAppend: true
  path: /usr/local/server/mongodb/logs/shard3.log
storage:
  dbPath: /usr/local/server/mongodb/shard3/data
  journal:
    enabled: true
  directoryPerDB: true                                             #是否一个库一个文件夹    
  engine: wiredTiger                                               #数据引擎   
  wiredTiger:
    engineConfig:
      cacheSizeGB: 2
      directoryForIndexes: true
      journalCompressor: zlib
    collectionConfig:
      blockCompressor: zlib
    indexConfig:
      prefixCompression: true
processManagement:	 #进程管理
  fork: true
  pidFilePath: /usr/local/server/mongodb/shard3/mongod.pid
net:
  port: 29003
  bindIp: 0.0.0.0
replication:
  replSetName: shard3
sharding:
  clusterRole: shardsvr
  archiveMovedChunks: true

6、分别启动mongodb启动实例

/usr/local/server/mongodb/bin/mongos --config /usr/local/server/mongodb/config/mongos.conf
/usr/local/server/mongodb/bin/mongod --config /usr/local/server/mongodb/config/configServer.conf
/usr/local/server/mongodb/bin/mongod --config /usr/local/server/mongodb/config/shard1.conf
/usr/local/server/mongodb/bin/mongod --config /usr/local/server/mongodb/config/shard2.conf
/usr/local/server/mongodb/bin/mongod --config /usr/local/server/mongodb/config/shard3.conf

7、配置服务器/usr/local/server/mongodb/bin/mongo --port 29004

use admin

添加成员：

rs.initiate(
{
_id: "configReplSet",
configsvr: true,
members: [
{ _id : 1, host : "192.168.131.8:29004", priority: 30 },
{ _id : 2, host : "192.168.131.10:29004", priority: 20 },
{ _id : 3, host : "192.168.131.9:29004", priority: 10 }
]
}
);

8、分别配置分片服务器

/usr/local/server/mongodb/bin/mongo --port 29001 连接shard1

use admin;

rs.initiate({_id:'shard1',members:[
{_id:1,host:'192.168.131.8:29001', priority: 30},
{_id:2,host:'192.168.131.10:29001', priority: 20},
{_id:3,host:'192.168.131.9:29001', priority: 0,arbiterOnly: true}
]});
其他分片服务器一样配置，略。。。
9、配置路由服务器

/usr/local/server/mongodb/bin/mongo --port 29005；

use admin;

路由服务器注册分片：
db.runCommand({addshard: "shard1/192.168.131.8:29001,192.168.131.9:29001,192.168.131.10:29001"});
db.runCommand({addshard: "shard2/192.168.131.8:29002,192.168.131.9:29002,192.168.131.10:29002"});
db.runCommand({addshard: "shard3/192.168.131.8:29003,192.168.131.9:29003,192.168.131.10:29003"});
# 查看
db.printShardingStatus()
启动分片数据库test：
db.runCommand({enablesharding: "test"});

设置分片键：

sh.shardCollection("test.use",{"usename":1});

到此配置完成。