MongoDB Replica Set (复制集)

来源：互联网发布：糖豆软件录制编辑：程序博客网时间：2024/05/29 17:36

Replica Set 架构图

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当主节点挂掉之后

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复制集的搭建过程（写的比较简陋）

1、在MongoDB的安装目录下新建replicSet文件夹，以及三个以端口号命名的文件夹

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2、在replicSet目录下的27000准备几个文件以及文件夹

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1）db文件夹
2）27000.conf 启动服务时用到的配置文件
3）mongod启动进程

27001、27003也需要准备相同的文件以及文件夹

3、修改配置文件

port=27000
bind_ip=192.168.1.217
dbpath=./db
replSet=cat 复制集的名称

27001、27002的配置文件也需要相同的配置选项不同的配置值

4、mongod启动服务

[root@mongodb mongodb-linux-x86_64-3.4.2]# cd replicSet/27000[root@mongodb 27000]# ./mongod -f 27000.conf

同时也需要启动27001、27002

5、初始化复制集

链接登录到192.168.1.217：27000，
在副本集中的一个且只有一个成员上使用rs.initiate（）：

rs.initiate()

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6、验证初始副本集配置

使用rs.conf（）显示副本集配置对象：

rs.conf()

/* 1 */{    "_id" : "cat",    "version" : 1,    "protocolVersion" : NumberLong(1),    "members" : [         {            "_id" : 0,            "host" : "192.168.1.217:27000",            "arbiterOnly" : false,            "buildIndexes" : true,            "hidden" : false,            "priority" : 1.0,            "tags" : {},            "slaveDelay" : NumberLong(0),            "votes" : 1        }    ],    "settings" : {        "chainingAllowed" : true,        "heartbeatIntervalMillis" : 2000,        "heartbeatTimeoutSecs" : 10,        "electionTimeoutMillis" : 10000,        "catchUpTimeoutMillis" : 2000,        "getLastErrorModes" : {},        "getLastErrorDefaults" : {            "w" : 1,            "wtimeout" : 0        },        "replicaSetId" : ObjectId("58ed0068d070c232c0da4b42")    }}

7、将剩余的成员添加到副本集

使用rs.add（）方法添加剩余的成员。

rs.add("192.168.1.217:27001")rs.add("192.168.1.217:27002")

查询状态：rs.conf

/* 1 */{    "_id" : "cat",    "version" : 3,    "protocolVersion" : NumberLong(1),    "members" : [         {            "_id" : 0,            "host" : "192.168.1.217:27000",            "arbiterOnly" : false,            "buildIndexes" : true,            "hidden" : false,            "priority" : 1.0,            "tags" : {},            "slaveDelay" : NumberLong(0),            "votes" : 1        },         {            "_id" : 1,            "host" : "192.168.1.217:27001",            "arbiterOnly" : false,            "buildIndexes" : true,            "hidden" : false,            "priority" : 1.0,            "tags" : {},            "slaveDelay" : NumberLong(0),            "votes" : 1        },         {            "_id" : 2,            "host" : "192.168.1.217:27002",            "arbiterOnly" : false,            "buildIndexes" : true,            "hidden" : false,            "priority" : 1.0,            "tags" : {},            "slaveDelay" : NumberLong(0),            "votes" : 1        }    ],    "settings" : {        "chainingAllowed" : true,        "heartbeatIntervalMillis" : 2000,        "heartbeatTimeoutSecs" : 10,        "electionTimeoutMillis" : 10000,        "catchUpTimeoutMillis" : 2000,        "getLastErrorModes" : {},        "getLastErrorDefaults" : {            "w" : 1,            "wtimeout" : 0        },        "replicaSetId" : ObjectId("58ed0068d070c232c0da4b42")    }}

8、检查副本集的状态

使用rs.status（）操作：

rs.status()

/* 1 */{    "set" : "cat",    "date" : ISODate("2017-04-11T16:22:27.728Z"),    "myState" : 1,    "term" : NumberLong(1),    "heartbeatIntervalMillis" : NumberLong(2000),    "optimes" : {        "lastCommittedOpTime" : {            "ts" : Timestamp(6407780872770027, 1),            "t" : NumberLong(1)        },        "appliedOpTime" : {            "ts" : Timestamp(6407780872770027, 1),            "t" : NumberLong(1)        },        "durableOpTime" : {            "ts" : Timestamp(6407780872770027, 1),            "t" : NumberLong(1)        }    },    "members" : [         {            "_id" : 0,            "name" : "192.168.1.217:27000",            "health" : 1.0,            "state" : 1,            "stateStr" : "PRIMARY",            "uptime" : 1249,            "optime" : {                "ts" : Timestamp(6407780872770027, 1),                "t" : NumberLong(1)            },            "optimeDate" : ISODate("2017-04-11T16:22:25.000Z"),            "electionTime" : Timestamp(6407778291494682, 2),            "electionDate" : ISODate("2017-04-11T16:12:24.000Z"),            "configVersion" : 3,            "self" : true        },         {            "_id" : 1,            "name" : "192.168.1.217:27001",            "health" : 1.0,            "state" : 2,            "stateStr" : "SECONDARY",            "uptime" : 177,            "optime" : {                "ts" : Timestamp(6407780872770027, 1),                "t" : NumberLong(1)            },            "optimeDurable" : {                "ts" : Timestamp(6407780872770027, 1),                "t" : NumberLong(1)            },            "optimeDate" : ISODate("2017-04-11T16:22:25.000Z"),            "optimeDurableDate" : ISODate("2017-04-11T16:22:25.000Z"),            "lastHeartbeat" : ISODate("2017-04-11T16:22:26.864Z"),            "lastHeartbeatRecv" : ISODate("2017-04-11T16:22:25.892Z"),            "pingMs" : NumberLong(0),            "syncingTo" : "192.168.1.217:27000",            "configVersion" : 3        },         {            "_id" : 2,            "name" : "192.168.1.217:27002",            "health" : 1.0,            "state" : 2,            "stateStr" : "SECONDARY",            "uptime" : 177,            "optime" : {                "ts" : Timestamp(6407780872770027, 1),                "t" : NumberLong(1)            },            "optimeDurable" : {                "ts" : Timestamp(6407780872770027, 1),                "t" : NumberLong(1)            },            "optimeDate" : ISODate("2017-04-11T16:22:25.000Z"),            "optimeDurableDate" : ISODate("2017-04-11T16:22:25.000Z"),            "lastHeartbeat" : ISODate("2017-04-11T16:22:26.864Z"),            "lastHeartbeatRecv" : ISODate("2017-04-11T16:22:25.947Z"),            "pingMs" : NumberLong(0),            "syncingTo" : "192.168.1.217:27001",            "configVersion" : 3        }    ],    "ok" : 1.0}

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