MONGODB 集群 配置及 客户端PHP 连接
前面看MONGODB 的集群配置，但一直没关系客户端是怎么连接的。以为在没有使用分片时，也可以使用mongos 及 config server 来处理。
在测试配置时，看到，并不是这回事。没有share时，config server 是无法配置的。
同时在这次配置时，也遇到访问权限问题，主要还是没理解集群服务器keyfile 的使用。（加了keyfile,必须使用用户/密码登录，功能类似于-- auth)
这里做一个记录。
mongodb 配置2数据节点+1仲裁节点的集群
1 建立相关目录：
mkdir /opt/mongodb/key
mkdir /opt/mongodb/config
mkdir /opt/mongodb/db1
mkdir /opt/mongodb/db2
mkdir /opt/mongodb/db3
2.建立key 文件
2.1 添加文件
echo "this is key file" >> r1
echo "this is key file" >> r2
echo "this is key file" >> r3
2.2 配置权限，设置为只读
chmod 600 r1 r2 r3
3.启动进程
/opt/mongodb/mongodb-linux-x86_64-2.5.5/bin/mongod --replSet rs1 --keyFile /opt/mongodb/key/r1 -dbpath=/opt/mongodb/db1 -logpath=/opt/mongodb/logs/mongodb_rep1.log --logappend --directoryperdb --fork --journal --port 28011
/opt/mongodb/mongodb-linux-x86_64-2.5.5/bin/mongod --replSet rs1 --keyFile /opt/mongodb/key/r2 -dbpath=/opt/mongodb/db2 -logpath=/opt/mongodb/logs/mongodb_rep2.log --logappend --directoryperdb --fork --journal --port 28012
/opt/mongodb/mongodb-linux-x86_64-2.5.5/bin/mongod --replSet rs1 --keyFile /opt/mongodb/key/r3 -dbpath=/opt/mongodb/db3 -logpath=/opt/mongodb/logs/mongodb_rep3.log --logappend --directoryperdb --fork --journal --port 28013
(注意： 添加了--directoryperdb 参数，如果没有添加此参数不会成功)
4.初始化replica set
用mongo连接其中一个mongod（例如：./mongo localhost:28011 ）执行：
> config = {_id:"rs1",members:[{_id:0,host:'localhost:28011'},{_id:1,host:'localhost:28012'}]}
--,{_id:2,host:'localhost:28013',"arbiterOnly":true}
> rs.initiate(config);
也可以使用另外加入第三个节点的方式配置
因为是在同一台服务器配置集群，为了节省磁盘空间，第3个节点会设置成是一个仲裁节点，（没有数据）
rs.add({_id:2,"host":"localhost:28013","arbiterOnly":true});
完成后查看状态：
rs1:PRIMARY> rs.status()
{
"set" : "rs1",
"date" : ISODate("2014-06-04T15:24:37Z"),
"myState" : 1,
"members" : [
{
"_id" : 0,
"name" : "localhost:28011",
"health" : 1,
"state" : 1,
"stateStr" : "PRIMARY",
"uptime" : 454,
"optime" : Timestamp(1401895370, 1),
"optimeDate" : ISODate("2014-06-04T15:22:50Z"),
"self" : true
},
{
"_id" : 1,
"name" : "localhost:28012",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 140,
"optime" : Timestamp(1401895370, 1),
"optimeDate" : ISODate("2014-06-04T15:22:50Z"),
"lastHeartbeat" : ISODate("2014-06-04T15:24:35Z"),
"lastHeartbeatRecv" : ISODate("2014-06-04T15:24:35Z"),
"pingMs" : 0,
"syncingTo" : "localhost:28011"
},
{
"_id" : 3,
"name" : "localhost:28013",
"health" : 1,
"state" : 7,
"stateStr" : "ARBITER",
"uptime" : 107,
"lastHeartbeat" : ISODate("2014-06-04T15:24:36Z"),
"lastHeartbeatRecv" : ISODate("2014-06-04T15:24:35Z"),
"pingMs" : 0
}
],
"ok" : 1
}
测试：
先在测试表中插入一条记录
> db.test.insert(_id:1,userid:1,name:'tang');
2014-06-04T11:35:24.335+0000 SyntaxError: Unexpected token :
> db.test.insert({_id:1,userid:1,name:'tang'});
SingleWriteResult({
"writeErrors" : [ ],
"writeConcernErrors" : [ ],
"nInserted" : 1,
"nUpserted" : 0,
"nUpdated" : 0,
"nModified" : 0,
"nRemoved" : 0,
"upserted" : [ ]
})
> db.test.find()
{ "_id" : ObjectId("5302c433b5b61e345817fb07"), "userid" : 1, "name" : "maketion ltd", "email" : "[email protected]", "password" : "psd" }
{ "_id" : ObjectId("53871082ed9422a9e22abc0c"), "company" : "" }
{ "_id" : ObjectId("53871098ed9422a9e22abc0d"), "company" : { "_mongo" : { "slaveOk" : false, "host" : "localhost:28001", "authStatus" : { "authRequired" : true, "replSetGetStatus" : false, "isMaster" : true }, "_useWriteCommands" : true }, "_db" : { "_mongo" : { "slaveOk" : false, "host" : "localhost:28001", "authStatus" : { "authRequired" : true, "replSetGetStatus" : false, "isMaster" : true }, "_useWriteCommands" : true }, "_name" : "mdsp" }, "_shortName" : "a.name", "_fullName" : "mdsp.a.name" }, "name" : "maketion Ltd" }
{ "_id" : 1, "userid" : 1, "name" : "tang" }
>
以下数据文件拷贝是基于参数 （--directoryperdb） 下完成的
1.关闭所有节点，
2.完成集群配置后，把单机环境下的数据库目录，拷贝到各节点数据库目录下，并保护数据文件的属性。
cp -pR db/mdsp db1/
cp -pR db/mdsp db2/
3.重启各节点，进入后检查数据库是否和原单节点一致。
4.如果 MongoDB 服务器启动时使用了 --auth 或 --keyFile 参数，你就必须在进行任何操作前进行认证。 你可以在连接时进行认证。方法是在链接字符串中指定用户名密码，
或者在 MongoClient::__construct() 构造函数中指定 "username" 和 "password"。
mongo localhost:28011 -u root -p root 登录，看到没有提示错误了。
以下是没有使用用户/密码登录的错误信息：
------------------------------遇到的问题描述------------------------
服务器没有添加 --auth 启动，
mongo 登录时，也会出没有权限的提示，这可能和上面的授权有关系。联系到上面的话题，大概这命令就是这个功能吧。
下面是遇到的错误提示。希望对大家有启发
在集群环境下，启动参加中也没加AUTH。但登录时，说没有权限。 错误如下：
[mongo@localhost bin]$ ./mongo -port 28011/admin
MongoDB shell version: 2.5.5
2014-06-05T10:53:18.292+0000 Error: Invalid port number "28011/admin" in connection string "127.0.0.1:28011/admin/test" at src/mongo/shell/mongo.js:135
exception: connect failed
[mongo@localhost bin]$ ./mongo localhost:28011/admin
MongoDB shell version: 2.5.5
connecting to: localhost:28011/admin
Error while trying to show server startup warnings: not authorized on admin to execute command { getLog: "startupWarnings" }
rs1:SECONDARY> exit
bye
[mongo@localhost bin]$ ./mongo localhost:28012/admin
MongoDB shell version: 2.5.5
connecting to: localhost:28012/admin
Error while trying to show server startup warnings: not authorized on admin to execute command { getLog: "startupWarnings" }
rs1:PRIMARY> use admin
switched to db admin
rs1:PRIMARY> show collections;
2014-06-05T10:54:43.063+0000 error: {
"$err" : "not authorized for query on admin.system.namespaces",
"code" : 13
} at src/mongo/shell/query.js:131
rs1:PRIMARY>
看到日志中 有个 user:"__system",key:"xxx" 这是默认的还是什么？
2014-06-05T10:57:22.688+0000 [conn14] end connection 127.0.0.1:34299 (3 connections now open)
2014-06-05T10:57:22.689+0000 [initandlisten] connection accepted from 127.0.0.1:34301 #15 (4 connections now open)
2014-06-05T10:57:22.689+0000 [conn15] authenticate db: local { authenticate: 1, nonce: "xxx", user: "__system", key: "xxx" }
2014-06-05T10:57:52.696+0000 [conn15] end connection 127.0.0.1:34301 (3 connections now open)
2014-06-05T10:57:52.696+0000 [initandlisten] connection accepted from 127.0.0.1:34303 #16 (4 connections now open)
2014-06-05T10:57:52.698+0000 [conn16] authenticate db: local { authenticate: 1, nonce: "xxx", user: "__system", key: "xxx" }
2014-06-05T10:58:22.704+0000 [conn16] end connection 127.0.0.1:34303 (3 connections now open)
2014-06-05T10:58:22.705+0000 [initandlisten] connection accepted from 127.0.0.1:34305 #17 (4 connections now open)
2014-06-05T10:58:22.706+0000 [conn17] authenticate db: local { authenticate: 1, nonce: "xxx", user: "__system", key: "xxx" }
2014-06-05T10:58:27.666+0000 [clientcursormon] mem (MB) res:69 virt:9643
2014-06-05T10:58:27.666+0000 [clientcursormon] mapped (incl journal view):8924
---------------- end -------------------------------
5.php 连接集群服务器示例： ，有点象oracle TNS,把多个服务器地址为列表，让客户端进行访问处理。
<?php
// Using multiple servers as the seed list (prefered)
$m = new MongoClient("mongodb://rs1.example.com:27017,rs2.example.com:27017/?replicaSet=myReplSetName"));
// Using one server as the seed list
$m = new MongoClient("mongodb://rs1.example.com:27017", array("replicaSet" => "myReplSetName"));
// Using multiple servers as the seed list
$m = new MongoClient("mongodb://rs1.example.com:27017,rs2.example.com:27017", array("replicaSet" => "myReplSetName"));
?>
还可以指定读优化策略：Read Preferences
You can specify tag sets with the following read preference modes:
MongoClient::RP_PRIMARY_PREFERRED
MongoClient::RP_SECONDARY
MongoClient::RP_SECONDARY_PREFERRED
MongoClient::RP_NEAREST
// Prefer the nearest server in the "east" data center also used for reporting,
// but fall back to a server in the "west" data center
$uri = 'mongodb://rs1.example.com,rs2.example.com/';
$uri .= '?readPreference=nearest';
$uri .= '&readPreferenceTags=dc:east,use:reporting';
$uri .= '&readPreferenceTags=dc:west';
$m = new MongoClient($uri, array('replicaSet' => 'rs'));
更多参考如下：
http://www.php.net/manual/zh/mongo.connecting.rs.php