mongodb添加arbiter节点的方法示例

2020-03-14 13:00:41

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前言

在创建mongodb/202796.html">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

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