MongoDB副本集配置好後修改配置

測試環境

Linux redhat6.5 1臺
端口：2701七、2701八、27019
修改端口爲27000、2700一、27002

配置

單臺服務器設置了三個配置文件（3個端口），模擬三臺mongod服務，並配置副本集。

/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

重啓mongod服務

重啓mongod服務後，發現副本集狀態出現異常：

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須要修改：

# 獲取副本集配置
replication:OTHER> cfg=rs.conf()
replication:OTHER> printjson(cfg)
# 查看配置節點
replication:OTHER> printjson(cfg.members[0])
# 修改節點端口
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"
# 從新配置
replication:OTHER> rs.reconfig(cfg)    # 可能會報錯"errmsg" : "replSetReconfig should only be run on PRIMARY, but my state is REMOVED; use the \"force\" argument to override",
# 報錯的話，根據報錯信息增強制指令執行
replication:OTHER> rs.reconfig(cfg, {force : true})

查看副本集狀態

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
}