MongoDB副本集如何添加和刪除仲裁節(jié)點(diǎn)

小編給大家分享一下MongoDB副本集如何添加和刪除仲裁節(jié)點(diǎn)，相信大部分人都還不怎么了解，因此分享這篇文章給大家參考一下，希望大家閱讀完這篇文章后大有收獲，下面讓我們一起去了解一下吧！

MongoDB仲裁者（Arbiter）是復(fù)制集中的一個(gè)mongodb實(shí)例，它并不保存數(shù)據(jù)。
仲裁節(jié)點(diǎn)使用最小的資源并且不要求硬件設(shè)備，最好不要將Arbiter部署在同一個(gè)數(shù)據(jù)集節(jié)點(diǎn)中，可以部署在其他服務(wù)器中，也可部署在單獨(dú)的虛擬機(jī)中。

當(dāng)節(jié)點(diǎn)數(shù)目為奇數(shù)時(shí)，可以不需要仲裁節(jié)點(diǎn)。
當(dāng)節(jié)點(diǎn)數(shù)目為偶數(shù)個(gè)時(shí)，需要部署一個(gè)仲裁節(jié)點(diǎn)，否則偶數(shù)個(gè)節(jié)點(diǎn)，當(dāng)主節(jié)點(diǎn)掛了后，其他節(jié)點(diǎn)會(huì)變?yōu)橹蛔x。

副本集添加仲裁節(jié)點(diǎn)步驟(本例中MongoDB副本集是一主兩從):
添加仲裁節(jié)點(diǎn):
在仲裁節(jié)點(diǎn)編輯mongodb.conf
# vi /etc/mongodb.conf
logpath=/home/mongodb/logs/arbiter.log
logappend=false
port=27019
fork=true
dbpath=/home/mongodb/arbiter
#auth=true
replSet=test  (應(yīng)和副本集其他節(jié)點(diǎn)的集群名字保持一致)

啟動(dòng)arbiter上的mongodb實(shí)例:
#/data/mongodb-3.4.13/bin/mongod -f /etc/mongodb.conf
about to fork child process, waiting until server is ready for connections.
forked process: 23331
child process started successfully, parent exiting

登陸到副本集上的主節(jié)點(diǎn)，進(jìn)行如下操作:
test:PRIMARY> rs.addArb("192.168.0.3:27019");
{ "ok" : 1 }

查看狀態(tài):
test:PRIMARY> rs.status()
{
        "set" : "test",
        "date" : ISODate("2018-02-27T08:24:28.866Z"),
        "myState" : 1,
        "term" : NumberLong(6),
        "heartbeatIntervalMillis" : NumberLong(2000),
        "optimes" : {
                "lastCommittedOpTime" : {
                        "ts" : Timestamp(1519719858, 1),
                        "t" : NumberLong(6)
                },
                "appliedOpTime" : {
                        "ts" : Timestamp(1519719858, 1),
                        "t" : NumberLong(6)
                },
                "durableOpTime" : {
                        "ts" : Timestamp(1519719858, 1),
                        "t" : NumberLong(6)
                }
        },
        "members" : [
                {
                        "_id" : 0,
                        "name" : "192.168.0.51:27017",
                        "health" : 1,
                        "state" : 1,
                        "stateStr" : "PRIMARY",
                        "uptime" : 4429,
                        "optime" : {
                                "ts" : Timestamp(1519719858, 1),
                                "t" : NumberLong(6)
                        },
                        "optimeDate" : ISODate("2018-02-27T08:24:18Z"),
                        "electionTime" : Timestamp(1519716787, 1),
                        "electionDate" : ISODate("2018-02-27T07:33:07Z"),
                        "configVersion" : 4,
                        "self" : true
                },
                {
                        "_id" : 1,
                        "name" : "192.168.0.52:27017",
                        "health" : 1,
                        "state" : 2,
                        "stateStr" : "SECONDARY",
                        "uptime" : 4369,
                        "optime" : {
                                "ts" : Timestamp(1519719858, 1),
                                "t" : NumberLong(6)
                        },
                        "optimeDurable" : {
                                "ts" : Timestamp(1519719858, 1),
                                "t" : NumberLong(6)
                        },
                        "optimeDate" : ISODate("2018-02-27T08:24:18Z"),
                        "optimeDurableDate" : ISODate("2018-02-27T08:24:18Z"),
                        "lastHeartbeat" : ISODate("2018-02-27T08:24:27.265Z"),
                        "lastHeartbeatRecv" : ISODate("2018-02-27T08:24:28.224Z"),
                        "pingMs" : NumberLong(0),
                        "syncingTo" : "192.168.0.51:27017",
                        "configVersion" : 4
                },
                {
                        "_id" : 2,
                        "name" : "192.168.0.61:27017",
                        "health" : 1,
                        "state" : 2,
                        "stateStr" : "SECONDARY",
                        "uptime" : 2501,
                        "optime" : {
                                "ts" : Timestamp(1519719858, 1),
                                "t" : NumberLong(6)
                        },
                        "optimeDurable" : {
                                "ts" : Timestamp(1519719858, 1),
                                "t" : NumberLong(6)
                        },
                        "optimeDate" : ISODate("2018-02-27T08:24:18Z"),
                        "optimeDurableDate" : ISODate("2018-02-27T08:24:18Z"),
                        "lastHeartbeat" : ISODate("2018-02-27T08:24:27.099Z"),
                        "lastHeartbeatRecv" : ISODate("2018-02-27T08:24:28.024Z"),
                        "pingMs" : NumberLong(0),
                        "syncingTo" : "192.168.0.51:27017",
                        "configVersion" : 4
                },
                {
                        "_id" : 3,
                        "name" : "192.168.0.3:27019",
                        "health" : 1,
                        "state" : 7,
                        "stateStr" : "ARBITER",
                        "uptime" : 96,
                        "lastHeartbeat" : ISODate("2018-02-27T08:24:28.443Z"),
                        "lastHeartbeatRecv" : ISODate("2018-02-27T08:24:27.449Z"),
                        "pingMs" : NumberLong(1),
                        "configVersion" : 4
                }
        ],
        "ok" : 1
}
test:PRIMARY>


test:PRIMARY> db.isMaster()
{
        "hosts" : [
                "192.168.0.51:27017",
                "192.168.0.52:27017",
                "192.168.0.61:27017"
        ],
        "arbiters" : [
                "192.168.0.3:27019"
        ],
        "setName" : "test",
        "setVersion" : 4,
        "ismaster" : true,
        "secondary" : false,
        "primary" : "192.168.0.51:27017",
        "me" : "192.168.0.51:27017",
        "electionId" : ObjectId("7fffffff0000000000000006"),
        "lastWrite" : {
                "opTime" : {
                        "ts" : Timestamp(1519719928, 1),
                        "t" : NumberLong(6)
                },
                "lastWriteDate" : ISODate("2018-02-27T08:25:28Z")
        },
        "maxBsonObjectSize" : 16777216,
        "maxMessageSizeBytes" : 48000000,
        "maxWriteBatchSize" : 1000,
        "localTime" : ISODate("2018-02-27T08:25:33.660Z"),
        "maxWireVersion" : 5,
        "minWireVersion" : 0,
        "readOnly" : false,
        "ok" : 1
}

刪除仲裁節(jié)點(diǎn)方法:
test:PRIMARY> rs.remove("192.168.0.3:27019");

以上是“MongoDB副本集如何添加和刪除仲裁節(jié)點(diǎn)”這篇文章的所有內(nèi)容，感謝各位的閱讀！相信大家都有了一定的了解，希望分享的內(nèi)容對(duì)大家有所幫助，如果還想學(xué)習(xí)更多知識(shí)，歡迎關(guān)注億速云行業(yè)資訊頻道！