Mongodb集群与分片 2

前面我们介绍了简单的集群配置实例。在简单实例中,虽然MongoDB auto-Sharding解决了海量存储问题,和动态扩容问题,但是离我们在真实环境下面所需要的高可靠性和高可用性还有一定的距离。
下面我们就介绍一个接近实际的解决方案:
  • Shard:使用Replica Sets,来确保数据的可靠性。通过这个方案,可以在每个节点有数据的备份、实现自动控制容错转移和自动恢复
  • Config:使用3个配置服务器,确保元数据完整性
  • Route:配合LVS,实现负载均衡,提高接入性能。
 

1、配置集群目录

 
数据存储目录:
 1 $ mkdir -p /home/scotte.ye/data/10001
 2 $ mkdir -p /home/scotte.ye/data/10002
 3 $ mkdir -p /home/scotte.ye/data/10003
 4 
 5 $ mkdir -p /home/scotte.ye/data/10011
 6 $ mkdir -p /home/scotte.ye/data/10012
 7 $ mkdir -p /home/scotte.ye/data/10013
 8 
 9 $ mkdir -p /home/scotte.ye/data/config1
10 $ mkdir -p /home/scotte.ye/data/config2
11 $ mkdir -p /home/scotte.ye/data/config3
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日志目录:

1 $ mkdir -p /home/scotte.ye/data/logs
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2、配置 Shard Replica Sets
 
配置第一组Sets
1 //10001
2 $ ./mongod --shardsvr --fork -logpath=/home/data/logs/null -dbpath=/home/data/10001/ -port=10001 --nohttpinterface --replSet set1
3 
4 //10002
5 $ ./mongod --shardsvr --fork -logpath=/home/data/logs/null -dbpath=/home/data/10002/ -port=10002 --nohttpinterface --replSet set1
6 
7 //10003
8 $ ./mongod --shardsvr --fork -logpath=/home/data/logs/null -dbpath=/home/data/10003/ -port=10003 --nohttpinterface --replSet set1
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配置集群

 1 $ ./mongo -port 10001
 2 MongoDB shell version: 2.0.2
 3 connecting to: 127.0.0.1:10001/test
 4 >#配置集合1
 5 >#构建参数
 6 >cfg={_id:'set1',
 7 members:[{_id:1,host:'192.168.35.106:10001'},
 8                 {_id:1,host:'192.168.35.106:10002'},
 9                 {_id:1,host:'192.168.35.106:10003'}]
10 };
11 {
12      "_id":"set1",
13      "members":[
14           {
15                "_id":1,
16                "host":"192.168.35.106:10001"
17           },
18           {
19                "_id":2,
20                "host":"192.168.35.106:10002"
21           },
22           {
23                "_id":3,
24                "host":"192.168.35.106:10003"
25           }
26      ]
27 }
28 >#让参数生效
29 >rs.initiate(cfg);
30 {
31      "info":"Config now saved locally. Should come online in about aminute.",
32      "OK":1
33 }
34 >#查看运行状态
35 >rs.status();
36 {
37         "set" : "set1",
38         "date" : ISODate("2012-02-29T12:02:46Z"),
39         "myState" : 2,
40         "syncingTo" : "192.168.35.106:10003",
41         "members" : [
42                 {
43                         "_id" : 1,
44                         "name" : "192.168.35.106:10001",
45                         "health" : 1,
46                         "state" : 2,
47                         "stateStr" : "PRIMARY",
48                         "optime" : {
49                                 "t" : 1330435339000,
50                                 "i" : 2413
51                         },
52                         "optimeDate" : ISODate("2012-02-28T13:22:19Z"),
53                         "self" : true
54                 },
55                 {
56                         "_id" : 2,
57                         "name" : "192.168.35.106:10002",
58                         "health" : 1,
59                         "state" : 2,
60                         "stateStr" : "SECONDARY",
61                         "uptime" : 1112736,
62                         "optime" : {
63                                 "t" : 1330435339000,
64                                 "i" : 2413
65                         },
66                         "optimeDate" : ISODate("2012-02-28T13:22:19Z"),
67                         "lastHeartbeat" : ISODate("2012-02-29T12:02:45Z"),
68                         "pingMs" : 0
69                 },
70                 {
71                         "_id" : 3,
72                         "name" : "192.168.35.106:10003",
73                         "health" : 1,
74                         "state" : 1,
75                         "stateStr" : "SECONDARY",
76                         "uptime" : 1112736,
77                         "optime" : {
78                                 "t" : 1330435339000,
79                                 "i" : 2413
80                         },
81                         "optimeDate" : ISODate("2012-02-28T13:22:19Z"),
82                         "lastHeartbeat" : ISODate("2012-02-29T12:02:46Z"),
83                         "pingMs" : 0
84                 }
85         ],
86         "ok" : 1
87 }
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配置第二组sets

1 //10011
2 $ ./mongod --shardsvr --fork -logpath=/home/data/logs/null -dbpath=/home/data/10011/ -port=10011 --nohttpinterface --replSet set2
3 
4 //10012
5 $ ./mongod --shardsvr --fork -logpath=/home/data/logs/null -dbpath=/home/data/10012/ -port=10012 --nohttpinterface --replSet set2
6 
7 //10013
8 $ ./mongod --shardsvr --fork -logpath=/home/data/logs/null -dbpath=/home/data/10013/ -port=10013 --nohttpinterface --replSet set2
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配置集群

 1 $ ./mongo -port 10011
 2 MongoDB shell version: 2.0.2
 3 connecting to: 127.0.0.1:10011/test
 4 >#配置集合1
 5 >#构建参数
 6 >cfg={_id:'set2',
 7 members:[{_id:1,host:'192.168.35.106:10011'},
 8                 {_id:1,host:'192.168.35.106:10012'},
 9                 {_id:1,host:'192.168.35.106:10013'}]
10 };
11 {
12      "_id":"set2",
13      "members":[
14           {
15                "_id":1,
16                "host":"192.168.35.106:10011"
17           },
18           {
19                "_id":2,
20                "host":"192.168.35.106:10012"
21           },
22           {
23                "_id":3,
24                "host":"192.168.35.106:10013"
25           }
26      ]
27 }
28 >#让参数生效
29 >rs.initiate(cfg);
30 {
31      "info":"Config now saved locally. Should come online in about aminute.",
32      "OK":1
33 }
34 >#查看运行状态
35 >rs.status();
36 {
37         "set" : "set2",
38         "date" : ISODate("2012-02-29T12:12:46Z"),
39         "myState" : 2,
40         "syncingTo" : "192.168.35.106:10011",
41         "members" : [
42                 {
43                         "_id" : 1,
44                         "name" : "192.168.35.106:10011",
45                         "health" : 1,
46                         "state" : 2,
47                         "stateStr" : "PRIMARY",
48                         "optime" : {
49                                 "t" : 1330435339000,
50                                 "i" : 2413
51                         },
52                         "optimeDate" : ISODate("2012-02-28T13:22:19Z"),
53                         "self" : true
54                 },
55                 {
56                         "_id" : 2,
57                         "name" : "192.168.35.106:10012",
58                         "health" : 1,
59                         "state" : 2,
60                         "stateStr" : "SECONDARY",
61                         "uptime" : 1112736,
62                         "optime" : {
63                                 "t" : 1330435339000,
64                                 "i" : 2413
65                         },
66                         "optimeDate" : ISODate("2012-02-28T13:22:19Z"),
67                         "lastHeartbeat" : ISODate("2012-02-29T12:02:45Z"),
68                         "pingMs" : 0
69                 },
70                 {
71                         "_id" : 3,
72                         "name" : "192.168.35.106:10013",
73                         "health" : 1,
74                         "state" : 1,
75                         "stateStr" : "SECONDARY",
76                         "uptime" : 1112736,
77                         "optime" : {
78                                 "t" : 1330435339000,
79                                 "i" : 2413
80                         },
81                         "optimeDate" : ISODate("2012-02-28T13:22:19Z"),
82                         "lastHeartbeat" : ISODate("2012-02-29T12:02:46Z"),
83                         "pingMs" : 0
84                 }
85         ],
86         "ok" : 1
87 }
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启用config servier

1 $ ./mongod --configsvr --fork -logpath=/home/data/logs/null -dbpath=/home/data/config1/ -port=20000 --nohttpinterface
2 $ ./mongod --configsvr --fork -logpath=/home/data/logs/null -dbpath=/home/data/config2/ -port=20001 --nohttpinterface
3 $ ./mongod --configsvr --fork -logpath=/home/data/logs/null -dbpath=/home/data/config3/ -port=20002 --nohttpinterface
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启用Route server

1 $ ./mongos -configdb="192.168.35.106:20000,192.168.35.106:20001,192.168.35.106:20002" --fork -logpath=/home/data/logs/null
2 >#查看是否正常运行
3 >ps aux|grep mongos|grep -v grep
4 root      2726  0.0  0.1 174192  3392 ?        Sl   Feb16   3:20 ./mongos -configdb=192.168.35.106:20000,192.168.35.106:20001,192.168.35.106:20002 --fork -logpath=/home/data/logs/null
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开始配置Sharding

 1 $ ./mongo -port 10001
 2 MongoDB shell version: 2.0.2
 3 connecting to: 127.0.0.1:10001/test
 4 >#进入管理数据库
 5 >use admin
 6 switched to db admin
 7 >#添加Sharding
 8 > db.runcommand({addshard:'set1/192.168.35.106:10001,192.168.35.106:10002,192.168.35.106:10003'})
 9 {"shardAdded":"set1","ok":1}
10 > db.runCommand({addshard:'set2/192.168.35.106:10011,192.168.35.106:10012,192.168.35.106:10013'})
11 {"shardAdded":"set2","ok":1}
12 >#让test数据库支持Sharding
13 >db.runCommand({enablesharding:'test'})
14 {"ok":1}
15 >#让数据库中的一个集合生效,且根据ID来进行分片
16 >db.runCommand({shardcollection:'test.user',key:{_id:1}})
17 {"collectionshrded":"test.user","ok":1}
18 
19 注:另外可以通过下面两个命令查看sharding情况:
20 >db.runCommand({listshards:1}
21 >printShardingStatus();
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posted @ 2014-08-15 10:32  Chaoa  阅读(575)  评论(0编辑  收藏  举报