部署MongoDB副本集

vim mongod.conf

# for documentation of all options, see:
#   http://docs.mongodb.org/manual/reference/configuration-options/

# where to write logging data.
systemLog:
  destination: file
  logAppend: true		#启动或重启后是否追加写入
  path: /var/log/mongodb/mongod.log
#  traceAllExceptions: true	#打印异常详细信息

# Where and how to store data.
storage:
  dbPath: /data/mongodb
  journal:
    enabled: true
  directoryPerDB: false|true	#当为true时，mongodb使用单独的目录存储每个数据库，每个目录名称对应于数据库名称
#  engine:
#  mmapv1:
#  wiredTiger:
#    engineConfig:
#      cacheSizeGB: 1
#      directoryForIndexes: true
#    collectionConfig:
#      blockCompressor: zlib
#    indexConfig:
#      prefixCompression: true

# how the process runs
processManagement:
  fork: true 		#允许程序在后台运行
  pidFilePath: /var/run/mongodb/mongod.pid

# network interfaces
net:
  port: 27017
  bindIp: 0.0.0.0
  maxIncomingConnections: 65535		#最大连接数
  wireObjectCheck: true 		#mongod实例在收到客户端时验证所有请求，以防止客户端将格式错误或无效的bson插入到mongod数据库
  ipv6: false|true	#启用或禁用ipv6支持，默认禁用
  unixDomainSocket:
    enabled: true 	#启用或禁用unix套接字上的侦听
    pathPrefix: /tmp	#unix套接字的路径，默认/tmp目录下


#security:

#operationProfiling:

replication:
#  oplogSizeMB: 2048
  replSetName: xbd		#副本集名称，按需修改
 
#sharding:
#  clusterRole: shardsvr	#把此实例作为分片
#  clusterRole: configsvr	#把此实例作为配置服务器

## Enterprise-Only Options

#auditLog:

#snmp:

> config = {_id:"xbd",members:[
... {_id:0,host:"192.168.1.163:27017"},
... {_id:1,host:"192.168.1.126:27017"},
... {_id:2,host:"192.168.1.41:27017"}]
... }

> rs.initiate(config);	# 如果结果返回1，说明初始化成功

rs.status()	#查看副本集，所有节点都可以操作

db.isMaster()	#查看当前节点是否为主节点

rs.remove("192.168.1.41:27017")	#移除一个节点，需要在主节点操作

rs.add("192.168.1.41:27017")	#添加一个节点，需要在主节点操作
	
rs.addArb("192.168.10.108:27017")　　　#添加一个仲裁节点

cfg = rs.conf()
cfg.members[0].priority = 3
cfg.members[1].priority = 2
cfg.members[2].priority = 1
rs.reconfig(cfg)

rs.slaveOk()

cfg = {_id:"xbd",members:[
{_id:0,host:"192.168.1.126:27017",priority:2},
{_id:1,host:"192.168.1.163:27017",priority:1},	{_id:2,host:"192.168.1.41:27017",arbiterOnly:true}]
}

rs.initiate(cfg)

repset:SECONDARY> db.getMongo().setSlaveOk();