mongodb添加arbiter节点的方法示例
前言
在创建mongodb的replicaset的时候，只是做成了1主2从，没有做成1主1从1仲裁。这我们将一个几点从replicaset中删除，再以仲裁节点的身份加入到replicaset中：
1.初始状态：
shard1ReplSet:PRIMARY>rs.status();rs.status();
{
"set":"shard1ReplSet",
"date":ISODate("2017-02-21T07:48:03.058Z"),
"myState":1,
"term":NumberLong(1),
"heartbeatIntervalMillis":NumberLong(2000),
"optimes":{
"lastCommittedOpTime":{
"ts":Timestamp(0,0),
"t":NumberLong(-1)
},
"appliedOpTime":{
"ts":Timestamp(1487663274,1),
"t":NumberLong(1)
},
"durableOpTime":{
"ts":Timestamp(1487587982,1),
"t":NumberLong(-1)
}
},
"members":[
{
"_id":0,
"name":"10.13.0.130:22001",
"health":1,
"state":1,
"stateStr":"PRIMARY",
"uptime":76672,
"optime":{
"ts":Timestamp(1487663274,1),
"t":NumberLong(1)
},
"optimeDate":ISODate("2017-02-21T07:47:54Z"),
"electionTime":Timestamp(1487587993,1),
"electionDate":ISODate("2017-02-20T10:53:13Z"),
"configVersion":1,
"self":true
},
{
"_id":1,
"name":"10.13.0.131:22001",
"health":1,
"state":2,
"stateStr":"SECONDARY",
"uptime":75300,
"optime":{
"ts":Timestamp(1487663274,1),
"t":NumberLong(1)
},
"optimeDurable":{
"ts":Timestamp(1487587982,1),
"t":NumberLong(-1)
},
"optimeDate":ISODate("2017-02-21T07:47:54Z"),
"optimeDurableDate":ISODate("2017-02-20T10:53:02Z"),
"lastHeartbeat":ISODate("2017-02-21T07:48:02.150Z"),
"lastHeartbeatRecv":ISODate("2017-02-21T07:48:02.215Z"),
"pingMs":NumberLong(0),
"syncingTo":"10.13.0.132:22001",
"configVersion":1
},
{
"_id":2,
"name":"10.13.0.132:22001",
"health":1,
"state":2,
"stateStr":"SECONDARY",
"uptime":75300,
"optime":{
"ts":Timestamp(1487663274,1),
"t":NumberLong(1)
},
"optimeDurable":{
"ts":Timestamp(1487587982,1),
"t":NumberLong(-1)
},
"optimeDate":ISODate("2017-02-21T07:47:54Z"),
"optimeDurableDate":ISODate("2017-02-20T10:53:02Z"),
"lastHeartbeat":ISODate("2017-02-21T07:48:02.889Z"),
"lastHeartbeatRecv":ISODate("2017-02-21T07:48:01.503Z"),
"pingMs":NumberLong(0),
"syncingTo":"10.13.0.130:22001",
"configVersion":1
}
],
"ok":1
}
shard1ReplSet:PRIMARY>
shard1ReplSet:PRIMARY>
shard1ReplSet:PRIMARY>
shard1ReplSet:PRIMARY>
2.删除节点：
shard1ReplSet:PRIMARY>rs.remove("10.13.0.132:22001");rs.remove("10.13.0.132:22001");
{"ok":1}
shard1ReplSet:PRIMARY>rs.status();rs.status();
{
"set":"shard1ReplSet",
"date":ISODate("2017-02-21T07:50:52.934Z"),
"myState":1,
"term":NumberLong(1),
"heartbeatIntervalMillis":NumberLong(2000),
"optimes":{
"lastCommittedOpTime":{
"ts":Timestamp(0,0),
"t":NumberLong(-1)
},
"appliedOpTime":{
"ts":Timestamp(1487663447,1),
"t":NumberLong(1)
},
"durableOpTime":{
"ts":Timestamp(1487587982,1),
"t":NumberLong(-1)
}
},
"members":[
{
"_id":0,
"name":"10.13.0.130:22001",
"health":1,
"state":1,
"stateStr":"PRIMARY",
"uptime":76841,
"optime":{
"ts":Timestamp(1487663447,1),
"t":NumberLong(1)
},
"optimeDate":ISODate("2017-02-21T07:50:47Z"),
"electionTime":Timestamp(1487587993,1),
"electionDate":ISODate("2017-02-20T10:53:13Z"),
"configVersion":2,
"self":true
},
{
"_id":1,
"name":"10.13.0.131:22001",
"health":1,
"state":2,
"stateStr":"SECONDARY",
"uptime":75470,
"optime":{
"ts":Timestamp(1487663447,1),
"t":NumberLong(1)
},
"optimeDurable":{
"ts":Timestamp(1487587982,1),
"t":NumberLong(-1)
},
"optimeDate":ISODate("2017-02-21T07:50:47Z"),
"optimeDurableDate":ISODate("2017-02-20T10:53:02Z"),
"lastHeartbeat":ISODate("2017-02-21T07:50:51.182Z"),
"lastHeartbeatRecv":ISODate("2017-02-21T07:50:52.212Z"),
"pingMs":NumberLong(0),
"configVersion":2
}
],
"ok":1
}
shard1ReplSet:PRIMARY>
shard1ReplSet:PRIMARY>
shard1ReplSet:PRIMARY>
3.添加成arbiter节点：
shard1ReplSet:PRIMARY>rs.addArb("10.13.0.132:22001");rs.addArb("10.13.0.132:22001");
{"ok":1}
shard1ReplSet:PRIMARY>
shard1ReplSet:PRIMARY>rs.status();rs.status();
{
"set":"shard1ReplSet",
"date":ISODate("2017-02-21T07:54:05.161Z"),
"myState":1,
"term":NumberLong(1),
"heartbeatIntervalMillis":NumberLong(2000),
"optimes":{
"lastCommittedOpTime":{
"ts":Timestamp(0,0),
"t":NumberLong(-1)
},
"appliedOpTime":{
"ts":Timestamp(1487663637,1),
"t":NumberLong(1)
},
"durableOpTime":{
"ts":Timestamp(1487587982,1),
"t":NumberLong(-1)
}
},
"members":[
{
"_id":0,
"name":"10.13.0.130:22001",
"health":1,
"state":1,
"stateStr":"PRIMARY",
"uptime":77034,
"optime":{
"ts":Timestamp(1487663637,1),
"t":NumberLong(1)
},
"optimeDate":ISODate("2017-02-21T07:53:57Z"),
"electionTime":Timestamp(1487587993,1),
"electionDate":ISODate("2017-02-20T10:53:13Z"),
"configVersion":3,
"self":true
},
{
"_id":1,
"name":"10.13.0.131:22001",
"health":1,
"state":2,
"stateStr":"SECONDARY",
"uptime":75662,
"optime":{
"ts":Timestamp(1487663637,1),
"t":NumberLong(1)
},
"optimeDurable":{
"ts":Timestamp(1487587982,1),
"t":NumberLong(-1)
},
"optimeDate":ISODate("2017-02-21T07:53:57Z"),
"optimeDurableDate":ISODate("2017-02-20T10:53:02Z"),
"lastHeartbeat":ISODate("2017-02-21T07:54:03.210Z"),
"lastHeartbeatRecv":ISODate("2017-02-21T07:54:02.211Z"),
"pingMs":NumberLong(0),
"configVersion":3
},
{
"_id":2,
"name":"10.13.0.132:22001",
"health":1,
"state":7,
"stateStr":"ARBITER",
"uptime":5,
"lastHeartbeat":ISODate("2017-02-21T07:54:03.214Z"),
"lastHeartbeatRecv":ISODate("2017-02-21T07:54:02.274Z"),
"pingMs":NumberLong(0),
"configVersion":3
}
],
"ok":1
}
shard1ReplSet:PRIMARY>
注1：mongodb3.4之后，虽然要求configserver为replicaset，但是不支持arbiter。
添加的时候，会报错：
cfgReplSet:PRIMARY>rs.addArb("10.13.0.132:21000");rs.addArb("10.13.0.132:21000");
{
"ok":0,
"errmsg":"Arbitersarenotallowedinreplicasetconfigurationsbeingusedforconfigservers",
"code":103,
"codeName":"NewReplicaSetConfigurationIncompatible"
}
cfgReplSet:PRIMARY>
注2：rs.reconfig()也可以进行操作，效果类似re.remove+rs.addArb，详见：mongodb官方文档-RemoveMembersfromReplicaSet
总结
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