MongoDB副本集配置好后修改配置

摘要: 线上环境已经配置好副本集，但由于使用的是默认端口，做加固处理需要修改端口号，这里记录测试环境测试步骤

测试环境

Linux redhat6.5 1台
端口：27017、27018、27019
修改端口为27000、27001、27002

配置

单台服务器设置了三个配置文件（3个端口），模拟三台mongod服务，并配置副本集。

/usr/local/mongodb/bin/mongod -f /usr/local/mongodb/mongo1.conf
/usr/local/mongodb/bin/mongod -f /usr/local/mongodb/mongo2.conf
/usr/local/mongodb/bin/mongod -f /usr/local/mongodb/mongo3.conf

mongo1.conf

port=27017
bind_ip=127.0.0.1,192.168.249.181
pidfilepath=/var/run/mongod/mongod1.pid
dbpath=/usr/local/mongodb/data/mongod1
logpath=/usr/local/mongodb/log/mongod1.log
logappend=true
fork=true
auth=true
replSet=replication/192.168.249.181:27018
nohttpinterface=false

mongo1.conf（修改）

port=27000
bind_ip=127.0.0.1,192.168.249.181
pidfilepath=/var/run/mongod/mongod1.pid
dbpath=/usr/local/mongodb/data/mongod1
logpath=/usr/local/mongodb/log/mongod1.log
logappend=true
fork=true
auth=true
replSet=replication/192.168.249.181:27001
nohttpinterface=false

重启mongod服务

重启mongod服务后，发现副本集状态出现异常：

replication:OTHER>  rs.status()
{
"state" : 10,
"stateStr" : "REMOVED",
"uptime" : 282,
"optime" : {
"ts" : Timestamp(1504690040, 1),
"t" : NumberLong(8)
},
"optimeDate" : ISODate("2017-09-06T09:27:20Z"),
"ok" : 0,
"errmsg" : "Our replica set config is invalid or we are not a member of it",
"code" : 93,
"codeName" : "InvalidReplicaSetConfig"
}

恍然，配置的副本集端口也需要修改：

# 获取副本集配置
replication:OTHER> cfg=rs.conf()
replication:OTHER> printjson(cfg)
# 查看配置节点
replication:OTHER> printjson(cfg.members[0])
# 修改节点端口
replication:OTHER> cfg.members[0].host="192.168.249.181:27000"
replication:OTHER> cfg.members[1].host="192.168.249.181:27001"
replication:OTHER> cfg.members[2].host="192.168.249.181:27002"
# 重新配置
replication:OTHER> rs.reconfig(cfg)    # 可能会报错"errmsg" : "replSetReconfig should only be run on PRIMARY, but my state is REMOVED; use the \"force\" argument to override",
# 报错的话，根据报错信息加强制指令执行
replication:OTHER> rs.reconfig(cfg, {force : true})

查看副本集状态

replication:PRIMARY> rs.status()

replication:PRIMARY> rs.isMaster()
{
"hosts" : [
"192.168.249.181:27000",
"192.168.249.181:27001",
"192.168.249.181:27002"
],
"setName" : "replication",
"setVersion" : 52478,
"ismaster" : true,
"secondary" : false,
"primary" : "192.168.249.181:27002",
"me" : "192.168.249.181:27002",
"electionId" : ObjectId("7fffffff0000000000000009"),
"lastWrite" : {
"opTime" : {
"ts" : Timestamp(1504693178, 1),
"t" : NumberLong(9)
},
"lastWriteDate" : ISODate("2017-09-06T10:19:38Z")
},
"maxBsonObjectSize" : 16777216,
"maxMessageSizeBytes" : 48000000,
"maxWriteBatchSize" : 1000,
"localTime" : ISODate("2017-09-06T10:19:46.167Z"),
"maxWireVersion" : 5,
"minWireVersion" : 0,
"readOnly" : false,
"ok" : 1
}