Docker 搭建MongoDB Replication（副本集）

￡神魔★判官ぃ 2022-10-12 04:24 259阅读 0赞

# Docker 搭建MongoDB Replication（副本集） #

使用[Docker][]搭建MongoDB Replication（副本集）。

![在这里插入图片描述][20210703162824797.png_pic_center]  
![在这里插入图片描述][20210703162834986.png_pic_center]

副本集是一组MongoDB维护相同数据集的实例，一个副本集包含多个数据承载节点和可选的一个仲裁节点，数据承载节点中，只有一个成员为主节点，其他节点为辅节点。

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjg1Njg3MQ_size_16_color_FFFFFF_t_70_pic_center]

1.  在Docker中运行三个MongoDB容器。
    
        $ sudo docker run --name mongo0 -p 27017:27017 -d mongo --replSet "rs"
        e48b54e7cc31ad6b667b2df78146c1e6f962e1c0ca43a693f349dcac340d263a
        
        $ sudo docker run --name mongo1 -p 27018:27017 -d mongo --replSet "rs"
        de9ea9cca7615a50351d7034e55f45195508f6c13984cb21c74beadc92082eb2
        
        $ sudo docker run --name mongo2 -p 27019:27017 -d mongo --replSet "rs"
        0f57b504b6aa344b068f74a11fc54ad0e41020a7db87009f4a59e336cafb3016
2.  查看三个MongoDB容器的IP。
    
        $ sudo  docker inspect -f='{ {.Name}} { {.NetworkSettings.IPAddress}} { {.HostConfig.PortBindings}}' $(sudo docker ps -aq)
        
        /mongo2 172.17.0.4 map[27017/tcp:[{  27019}]]
        /mongo1 172.17.0.3 map[27017/tcp:[{  27018}]]
        /mongo0 172.17.0.2 map[27017/tcp:[{  27017}]]
3.  进入其中一个MongoDB容器中。
    
        $ mongo --host 127.0.0.1 --port 27017
        MongoDB shell version v3.6.8
        connecting to: mongodb://127.0.0.1:27017/
        Implicit session: session {  "id" : UUID("809a7003-fe26-4a50-a005-916fd1fb6275") }
        MongoDB server version: 4.4.2
        WARNING: shell and server versions do not match
        Server has startup warnings:
        { "t":{ "$date":"2021-07-03T06:38:07.640+00:00"},"s":"I",  "c":"STORAGE",  "id":22297,   "ctx":"initandlisten","msg":"Using the XFS filesystem is strongly recommended with the WiredTiger storage engine. See http://dochub.mongodb.org/core/prodnotes-filesystem","tags":["startupWarnings"]}
        { "t":{ "$date":"2021-07-03T06:38:08.778+00:00"},"s":"W",  "c":"CONTROL",  "id":22120,   "ctx":"initandlisten","msg":"Access control is not enabled for the database. Read and write access to data and configuration is unrestricted","tags":["startupWarnings"]}
        >
4.  定义副本集配置，然后初始化一个新的副本集。
    
        # 定义副本集配置
        > config={ 
        ...      _id:"rs",
        ...      members:[
        ...          { _id:0,host:"172.17.0.2:27017"},
        ...          { _id:1,host:"172.17.0.3:27017"},
        ...          { _id:2,host:"172.17.0.4:27017"}
        ... ]}
        { 
                "_id" : "rs",
                "members" : [
                        { 
                                "_id" : 0,
                                "host" : "172.17.0.2:27017"
                        },
                        { 
                                "_id" : 1,
                                "host" : "172.17.0.3:27017"
                        },
                        { 
                                "_id" : 2,
                                "host" : "172.17.0.4:27017"
                        }
                ]
        }
        >
        
        # 初始化一个新的副本集
        > rs.initiate(config)
        { 
                "ok" : 1,
                "$clusterTime" : { 
                        "clusterTime" : Timestamp(1625294671, 1),
                        "signature" : { 
                                "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
                                "keyId" : NumberLong(0)
                        }
                },
                "operationTime" : Timestamp(1625294671, 1)
        }
        rs:SECONDARY>
5.  查看副本集配置文档。
    
        rs:SECONDARY> rs.conf()
        { 
                "_id" : "rs",
                "version" : 1,
                "term" : 1,
                "protocolVersion" : NumberLong(1),
                "writeConcernMajorityJournalDefault" : true,
                "members" : [
                        { 
                                "_id" : 0,
                                "host" : "172.17.0.2:27017",
                                "arbiterOnly" : false,
                                "buildIndexes" : true,
                                "hidden" : false,
                                "priority" : 1,
                                "tags" : { 
        
                                },
                                "slaveDelay" : NumberLong(0),
                                "votes" : 1
                        },
                        { 
                                "_id" : 1,
                                "host" : "172.17.0.3:27017",
                                "arbiterOnly" : false,
                                "buildIndexes" : true,
                                "hidden" : false,
                                "priority" : 1,
                                "tags" : { 
        
                                },
                                "slaveDelay" : NumberLong(0),
                                "votes" : 1
                        },
                        { 
                                "_id" : 2,
                                "host" : "172.17.0.4:27017",
                                "arbiterOnly" : false,
                                "buildIndexes" : true,
                                "hidden" : false,
                                "priority" : 1,
                                "tags" : { 
        
                                },
                                "slaveDelay" : NumberLong(0),
                                "votes" : 1
                        }
                ],
                "settings" : { 
                        "chainingAllowed" : true,
                        "heartbeatIntervalMillis" : 2000,
                        "heartbeatTimeoutSecs" : 10,
                        "electionTimeoutMillis" : 10000,
                        "catchUpTimeoutMillis" : -1,
                        "catchUpTakeoverDelayMillis" : 30000,
                        "getLastErrorModes" : { 
        
                        },
                        "getLastErrorDefaults" : { 
                                "w" : 1,
                                "wtimeout" : 0
                        },
                        "replicaSetId" : ObjectId("60e0074ea86185c91473b702")
                }
        }
        rs:PRIMARY>
6.  查看副本集状态。
    
        rs:PRIMARY> rs.status()
        { 
                "set" : "rs",
                "date" : ISODate("2021-07-03T06:58:41.973Z"),
                "myState" : 1,
                "term" : NumberLong(1),
                "syncSourceHost" : "",
                "syncSourceId" : -1,
                "heartbeatIntervalMillis" : NumberLong(2000),
                "majorityVoteCount" : 2,
                "writeMajorityCount" : 2,
                "votingMembersCount" : 3,
                "writableVotingMembersCount" : 3,
                "optimes" : { 
                        "lastCommittedOpTime" : { 
                                "ts" : Timestamp(1625295512, 1),
                                "t" : NumberLong(1)
                        },
                        "lastCommittedWallTime" : ISODate("2021-07-03T06:58:32.770Z"),
                        "readConcernMajorityOpTime" : { 
                                "ts" : Timestamp(1625295512, 1),
                                "t" : NumberLong(1)
                        },
                        "readConcernMajorityWallTime" : ISODate("2021-07-03T06:58:32.770Z"),
                        "appliedOpTime" : { 
                                "ts" : Timestamp(1625295512, 1),
                                "t" : NumberLong(1)
                        },
                        "durableOpTime" : { 
                                "ts" : Timestamp(1625295512, 1),
                                "t" : NumberLong(1)
                        },
                        "lastAppliedWallTime" : ISODate("2021-07-03T06:58:32.770Z"),
                        "lastDurableWallTime" : ISODate("2021-07-03T06:58:32.770Z")
                },
                "lastStableRecoveryTimestamp" : Timestamp(1625295462, 1),
                "electionCandidateMetrics" : { 
                        "lastElectionReason" : "electionTimeout",
                        "lastElectionDate" : ISODate("2021-07-03T06:44:42.191Z"),
                        "electionTerm" : NumberLong(1),
                        "lastCommittedOpTimeAtElection" : { 
                                "ts" : Timestamp(0, 0),
                                "t" : NumberLong(-1)
                        },
                        "lastSeenOpTimeAtElection" : { 
                                "ts" : Timestamp(1625294671, 1),
                                "t" : NumberLong(-1)
                        },
                        "numVotesNeeded" : 2,
                        "priorityAtElection" : 1,
                        "electionTimeoutMillis" : NumberLong(10000),
                        "numCatchUpOps" : NumberLong(0),
                        "newTermStartDate" : ISODate("2021-07-03T06:44:42.436Z"),
                        "wMajorityWriteAvailabilityDate" : ISODate("2021-07-03T06:44:43.553Z")
                },
                "members" : [
                        { 
                                "_id" : 0,
                                "name" : "172.17.0.2:27017",
                                "health" : 1,
                                "state" : 1,
                                "stateStr" : "PRIMARY",
                                "uptime" : 1234,
                                "optime" : { 
                                        "ts" : Timestamp(1625295512, 1),
                                        "t" : NumberLong(1)
                                },
                                "optimeDate" : ISODate("2021-07-03T06:58:32Z"),
                                "syncSourceHost" : "",
                                "syncSourceId" : -1,
                                "infoMessage" : "",
                                "electionTime" : Timestamp(1625294682, 1),
                                "electionDate" : ISODate("2021-07-03T06:44:42Z"),
                                "configVersion" : 1,
                                "configTerm" : 1,
                                "self" : true,
                                "lastHeartbeatMessage" : ""
                        },
                        { 
                                "_id" : 1,
                                "name" : "172.17.0.3:27017",
                                "health" : 1,
                                "state" : 2,
                                "stateStr" : "SECONDARY",
                                "uptime" : 850,
                                "optime" : { 
                                        "ts" : Timestamp(1625295512, 1),
                                        "t" : NumberLong(1)
                                },
                                "optimeDurable" : { 
                                        "ts" : Timestamp(1625295512, 1),
                                        "t" : NumberLong(1)
                                },
                                "optimeDate" : ISODate("2021-07-03T06:58:32Z"),
                                "optimeDurableDate" : ISODate("2021-07-03T06:58:32Z"),
                                "lastHeartbeat" : ISODate("2021-07-03T06:58:40.303Z"),
                                "lastHeartbeatRecv" : ISODate("2021-07-03T06:58:41.408Z"),
                                "pingMs" : NumberLong(0),
                                "lastHeartbeatMessage" : "",
                                "syncSourceHost" : "172.17.0.2:27017",
                                "syncSourceId" : 0,
                                "infoMessage" : "",
                                "configVersion" : 1,
                                "configTerm" : 1
                        },
                        { 
                                "_id" : 2,
                                "name" : "172.17.0.4:27017",
                                "health" : 1,
                                "state" : 2,
                                "stateStr" : "SECONDARY",
                                "uptime" : 850,
                                "optime" : { 
                                        "ts" : Timestamp(1625295512, 1),
                                        "t" : NumberLong(1)
                                },
                                "optimeDurable" : { 
                                        "ts" : Timestamp(1625295512, 1),
                                        "t" : NumberLong(1)
                                },
                                "optimeDate" : ISODate("2021-07-03T06:58:32Z"),
                                "optimeDurableDate" : ISODate("2021-07-03T06:58:32Z"),
                                "lastHeartbeat" : ISODate("2021-07-03T06:58:40.332Z"),
                                "lastHeartbeatRecv" : ISODate("2021-07-03T06:58:41.410Z"),
                                "pingMs" : NumberLong(0),
                                "lastHeartbeatMessage" : "",
                                "syncSourceHost" : "172.17.0.2:27017",
                                "syncSourceId" : 0,
                                "infoMessage" : "",
                                "configVersion" : 1,
                                "configTerm" : 1
                        }
                ],
                "ok" : 1,
                "$clusterTime" : { 
                        "clusterTime" : Timestamp(1625295512, 1),
                        "signature" : { 
                                "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
                                "keyId" : NumberLong(0)
                        }
                },
                "operationTime" : Timestamp(1625295512, 1)
        }
        rs:PRIMARY>

更多的mongoShell的复制命令参考[MongoDB手册][MongoDB]。

[Docker]: https://wujing.blog.csdn.net/article/details/107030888
[20210703162824797.png_pic_center]: /images/20221005/036e4ed846ee49ebbee658dd26bbfaae.png
[20210703162834986.png_pic_center]: /images/20221005/8c2b07d8329a4258aad8afe93ea83491.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjg1Njg3MQ_size_16_color_FFFFFF_t_70_pic_center]: /images/20221005/46173ead05d446f8ba4e56b69269dfe0.png
[MongoDB]: https://docs.mongodb.com/manual/reference/replication/#replication-methods-in-the-mongo-shell