怎么样使用mongodb添加arbiter节点

怎么样使用mongodb添加arbiter节点，在创建mongodb的replica set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replica set中删除，再以仲裁节点的身份加入到replica set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： mongodb 3.4之后，虽然要求config server为replica set，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" : "Arbiters are not allowed in replica set configurations being used for config servers",

"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- Remove Members from Replica Set

总结

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