disconf-基於xml分佈式配置管理mongo

mongodb目前有3種部署方式：單機、副本集（replica set）、分片（shard），本文結合disconf介紹這3種部署方式該如何和disconf配合使用

1. 單機版本
   a. 在resources文件夾下新建mongo-single.properties，內容爲：
   

   # mongo
   mongo.db.name=xxxdb
   mongo.host=localhost
   mongo.port=27017
   mongo.connectionsPerHost=8
   mongo.threadsAllowedToBlockForConnectionMultiplier=4
   mongo.connectTimeout=5000
   mongo.maxWaitTime=15000
   mongo.autoConnectRetry=true
   mongo.socketKeepAlive=false
   mongo.socketTimeout=5000
   mongo.slaveOk=false

   b. 在resources文件夾下新建mongo-single.xml，內容爲：
   

   <?xml version="1.0" encoding="UTF-8"?>
   <beans xmlns="http://www.springframework.org/schema/beans"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
     xmlns:util="http://www.springframework.org/schema/util" xmlns:mongo="http://www.springframework.org/schema/data/mongo"
     xsi:schemaLocation="http://www.springframework.org/schema/beans
               http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
               http://www.springframework.org/schema/context
               http://www.springframework.org/schema/context/spring-context.xsd
               http://www.springframework.org/schema/util
               http://www.springframework.org/schema/util/spring-util-3.0.xsd
               http://www.springframework.org/schema/data/mongo
               http://www.springframework.org/schema/data/mongo/spring-mongo-1.0.xsd">
   
     <mongo:mongo host="${mongo.host}" port="${mongo.port}">
       <mongo:options connections-per-host="${mongo.connectionsPerHost}"
         threads-allowed-to-block-for-connection-multiplier="${mongo.threadsAllowedToBlockForConnectionMultiplier}"
         connect-timeout="${mongo.connectTimeout}" max-wait-time="${mongo.maxWaitTime}"
         auto-connect-retry="${mongo.autoConnectRetry}" socket-keep-alive="${mongo.socketKeepAlive}"
         socket-timeout="${mongo.socketTimeout}" slave-ok="${mongo.slaveOk}"
         write-number="1" write-timeout="0" write-fsync="true" />
     </mongo:mongo>
     <mongo:db-factory dbname="${mongo.db.name}" mongo-ref="mongo" />
     <bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">
       <constructor-arg name="mongoDbFactory" ref="mongoDbFactory" />
     </bean>
   </beans>
   

   主要是配置了一個mongoTemplate bean提供mongo crud的api封裝接口，使用時只要注入該bean就可以，主要用的是spring data mongo
   
2. 副本集
   創建mongo-replset.properties，內容爲：
   

   # mongo
   mongo.db.name=xxxdb
   mongo.replset=ip1:27017,ip1:27018,ip1:27019
   mongo.connectionsPerHost=8
   mongo.threadsAllowedToBlockForConnectionMultiplier=4
   mongo.connectTimeout=5000
   mongo.maxWaitTime=15000
   mongo.autoConnectRetry=true
   mongo.socketKeepAlive=false
   mongo.socketTimeout=5000
   mongo.slaveOk=true

   主要是指定了replset，將slaveOk設置爲true表示從節點是可以接受讀請求（默認是不可以的，必須從client端進行設置）
   創建mongo-replset.xml，內容爲：
   

   <?xml version="1.0" encoding="UTF-8"?>
   <beans xmlns="http://www.springframework.org/schema/beans"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
     xmlns:util="http://www.springframework.org/schema/util" xmlns:mongo="http://www.springframework.org/schema/data/mongo"
     xsi:schemaLocation="http://www.springframework.org/schema/beans
               http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
               http://www.springframework.org/schema/context
               http://www.springframework.org/schema/context/spring-context.xsd
               http://www.springframework.org/schema/util
               http://www.springframework.org/schema/util/spring-util-3.0.xsd
               http://www.springframework.org/schema/data/mongo
               http://www.springframework.org/schema/data/mongo/spring-mongo-1.0.xsd">
   
     <mongo:mongo id="mongo" replica-set="${mongo.replset}">
       <mongo:options connections-per-host="${mongo.connectionsPerHost}"
          threads-allowed-to-block-for-connection-multiplier="${mongo.threadsAllowedToBlockForConnectionMultiplier}"
          connect-timeout="${mongo.connectTimeout}" max-wait-time="${mongo.maxWaitTime}"
          auto-connect-retry="${mongo.autoConnectRetry}" socket-keep-alive="${mongo.socketKeepAlive}"
          socket-timeout="${mongo.socketTimeout}" slave-ok="${mongo.slaveOk}"
          write-number="1" write-timeout="0" write-fsync="true" />
     </mongo:mongo>
   
     <mongo:db-factory dbname="${mongo.db.name}" mongo-ref="mongo" />
     <bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">
       <constructor-arg name="mongoDbFactory" ref="mongoDbFactory" />
     </bean>
   </beans>
   

   使用方法同單機
3. 分片
   新建mongo-shard.properties，內容爲：
   

   # mongo
   mongo.db.name=sparta
   mongo.host=ip
   mongo.port=27117
   mongo.connectionsPerHost=8
   mongo.threadsAllowedToBlockForConnectionMultiplier=4
   mongo.connectTimeout=5000
   mongo.maxWaitTime=15000
   mongo.autoConnectRetry=true
   mongo.socketKeepAlive=false
   mongo.socketTimeout=5000
   mongo.slaveOk=false

   這裏的ip和port需要指定的是mogos（當然mongos也可以建立副本集）進程的ip和端口，由mongos負責分發請求到每個不同的分片
   新建mongo-shard.xml，內容爲：
   

   <?xml version="1.0" encoding="UTF-8"?>
   <beans xmlns="http://www.springframework.org/schema/beans"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
     xmlns:util="http://www.springframework.org/schema/util" xmlns:mongo="http://www.springframework.org/schema/data/mongo"
     xsi:schemaLocation="http://www.springframework.org/schema/beans
               http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
               http://www.springframework.org/schema/context
               http://www.springframework.org/schema/context/spring-context.xsd
               http://www.springframework.org/schema/util
               http://www.springframework.org/schema/util/spring-util-3.0.xsd
               http://www.springframework.org/schema/data/mongo
               http://www.springframework.org/schema/data/mongo/spring-mongo-1.0.xsd">
   
     <mongo:mongo host="${mongo.host}" port="${mongo.port}">
       <mongo:options connections-per-host="${mongo.connectionsPerHost}"
         threads-allowed-to-block-for-connection-multiplier="${mongo.threadsAllowedToBlockForConnectionMultiplier}"
         connect-timeout="${mongo.connectTimeout}" max-wait-time="${mongo.maxWaitTime}"
         auto-connect-retry="${mongo.autoConnectRetry}" socket-keep-alive="${mongo.socketKeepAlive}"
         socket-timeout="${mongo.socketTimeout}" slave-ok="${mongo.slaveOk}"
         write-number="1" write-timeout="0" write-fsync="true" />
     </mongo:mongo>
     <mongo:db-factory dbname="${mongo.db.name}" mongo-ref="mongo" />
     <bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">
       <constructor-arg name="mongoDbFactory" ref="mongoDbFactory" />
     </bean>
   </beans>
   

   使用方法同單機
   
   基於上述配置可以將mongo和disconf配置使用，讓disconf來管理mongo的配置文件

參考：https://github.com/knightliao/disconf/wiki