程序師世界是廣大編程愛好者互助、分享、學習的平台,程序師世界有你更精彩!
首頁
編程語言
C語言|JAVA編程
Python編程
網頁編程
ASP編程|PHP編程
JSP編程
數據庫知識
MYSQL數據庫|SqlServer數據庫
Oracle數據庫|DB2數據庫
 程式師世界 >> 編程語言 >> 更多編程語言 >> 更多關於編程 >> mongodb replica set 添加/刪除節點方法

mongodb replica set 添加/刪除節點方法

編輯:更多關於編程

       replica set多服務器主從,添加,刪除節點,肯定會經常遇到的。下面詳細說明一下,添加,刪除節點的2種方法。

      一,利用rs.reconfig,來添加,刪除節點

      1,添加節點

     代碼如下  

    repmore:PRIMARY> config = {_id:"repmore",members:[{_id:0,host:'127.0.0.1:27017',priority :2},{_id:1,host:'127.0.0.1:27018',priority:1}]};   //添加節點

    repmore:PRIMARY> rs.reconfig(config);   //使配置生效

    repmore:PRIMARY> rs.status();     //查看節點狀態

      節點添加成功。

      注意:新增節點的replSet要和其他節點要一樣

      2,刪除節點(刪除節點前最好是先關閉需要刪除的節點,之後通過命令 rs.remove 來刪除)

     代碼如下  

    repmore:PRIMARY> config = {_id:"repmore",members:[{_id:0,host:'127.0.0.1:27017',priority :2}]};     //刪除節點

    repmore:PRIMARY> rs.reconfig(config);   //使配置生效

    repmore:PRIMARY> rs.status();   //查看節點狀態

      二,利用rs.add和rs.remove來添加刪除節點

     代碼如下  

    repmore:PRIMARY> rs.add("127.0.0.1:27018");     //添加節點

    repmore:PRIMARY> rs.remove("127.0.0.1:27018");  //刪除節

      注意:利用rs.add和rs.remove是不用rs.reconfig來使用配置生效的。

      最後對於刪除節點我這裡再附一個標准流程給各位

      相應的節點,操作如下:

     代碼如下  

    --1 查看當前 Replica Set 配置

     [mongo@redhatB mongodb]$ mongo 127.0.0.1:27018
    MongoDB shell version: 2.2.1
    connecting to: 127.0.0.1:27018/test
    rs0:PRIMARY> rs.conf();
    {
            "_id" : "rs0",
            "version" : 4,
            "members" : [
                    {
                            "_id" : 0,
                            "host" : "redhatB.example.com:27018"
                    },
                    {
                            "_id" : 1,
                            "host" : "redhatB.example.com:27019"
                    },
                    {
                            "_id" : 2,
                            "host" : "redhatB.example.com:27020"
                    },
                    {
                            "_id" : 3,
                            "host" : "redhatB.example.com:27021"
                    }
            ]
    }

      
       備注:計劃刪除節點 "_id" : 3。


    --2 關閉 27021 節點服務

     [mongo@redhatB data04]$ ps -ef | grep 27021
    mongo    11733     1  0 21:03 ?        00:00:15 mongod -f /pgdata_xc/mongodb/data04/mongodb_27021.conf
    mongo    14422  2953  0 21:53 pts/0    00:00:00 mongo 127.0.0.1:27021
    mongo    14490  4027  0 21:54 pts/1    00:00:00 grep 27021
    [mongo@redhatB data04]$ kill 11733

      


    --3 查看 replica set 狀態

     rs0:PRIMARY> rs.status();
    {
            "set" : "rs0",
            "date" : ISODate("2012-11-22T13:57:15Z"),
            "myState" : 1,
            "members" : [
                    {
                            "_id" : 0,
                            "name" : "redhatB.example.com:27018",
                            "health" : 1,
                            "state" : 1,
                            "stateStr" : "PRIMARY",
                            "uptime" : 21279,
                            "optime" : Timestamp(1353589624000, 1),
                            "optimeDate" : ISODate("2012-11-22T13:07:04Z"),
                            "self" : true
                    },
                    {
                            "_id" : 1,
                            "name" : "redhatB.example.com:27019",
                            "health" : 1,
                            "state" : 2,
                            "stateStr" : "SECONDARY",
                            "uptime" : 18908,
                            "optime" : Timestamp(1353589624000, 1),
                            "optimeDate" : ISODate("2012-11-22T13:07:04Z"),
                            "lastHeartbeat" : ISODate("2012-11-22T13:57:13Z"),
                            "pingMs" : 0
                    },
                    {
                            "_id" : 2,
                            "name" : "redhatB.example.com:27020",
                            "health" : 1,
                            "state" : 2,
                            "stateStr" : "SECONDARY",
                            "uptime" : 18900,
                            "optime" : Timestamp(1353589624000, 1),
                            "optimeDate" : ISODate("2012-11-22T13:07:04Z"),
                            "lastHeartbeat" : ISODate("2012-11-22T13:57:14Z"),
                            "pingMs" : 0
                    },
                    {
                            "_id" : 3,
                            "name" : "redhatB.example.com:27021",
                            "health" : 0,
                            "state" : 8,
                            "stateStr" : "(not reachable/healthy)",
                            "uptime" : 0,
                            "optime" : Timestamp(1353589624000, 1),
                            "optimeDate" : ISODate("2012-11-22T13:07:04Z"),
                            "lastHeartbeat" : ISODate("2012-11-22T13:55:20Z"),
                            "pingMs" : 0,
                            "errmsg" : "socket exception [CONNECT_ERROR] for redhatB.example.com:27021"
                    }
            ],
            "ok" : 1
    }

      備注:最後一個節點 stateStr 狀態為 “not reachable/healthy”。
     
    --4 刪除節點

     rs0:PRIMARY> rs.remove("redhatB.example.com:27021");
    Thu Nov 22 21:58:45 DBClientCursor::init call() failed
    Thu Nov 22 21:58:45 query failed : admin.$cmd { replSetReconfig: { _id: "rs0", version: 5, members: [ { _id: 0, host: "redhatB.example.com:27018" }, { _id: 1, host: "redhatB.example.com:27019" }, { _id: 2, host: "redhatB.example.com:27020" } ] } } to: 127.0.0.1:27018
    Thu Nov 22 21:58:45 Error: error doing query: failed src/mongo/shell/collection.js:155
    Thu Nov 22 21:58:45 trying reconnect to 127.0.0.1:27018
    Thu Nov 22 21:58:45 reconnect 127.0.0.1:27018 ok
    rs0:SECONDARY>
    rs0:PRIMARY>

      


    --5 再次查看 replica set 配置

     rs0:PRIMARY> rs.conf();
    {
            "_id" : "rs0",
            "version" : 5,
            "members" : [
                    {
                            "_id" : 0,
                            "host" : "redhatB.example.com:27018"
                    },
                    {
                            "_id" : 1,
                            "host" : "redhatB.example.com:27019"
                    },
                    {
                            "_id" : 2,
                            "host" : "redhatB.example.com:27020"
                    }
            ]
    }

      備注:節點 "redhatB.example.com:27021" 已刪除。

      --6 刪除舊結點數據目錄

     代碼如下  

     [mongo@redhatB mongodb]$ rm -rf  /mongodb/data04 

    1. 上一頁:
    2. 下一頁:
    Copyright © 程式師世界 All Rights Reserved