WSO2是否支持MySQL主备集群？

Question

我曾尝试在WSO2集群部署中使用MySQL主从集群，但在启动时失败。WSO2是否只支持MySql无共享集群？如何支持MySQL主从版？

我的数据源配置如下：

<datasource>
        <name>WSO2REG_LOCAL</name>
        <description>The datasource used for registry</description>
        <jndiConfig>
            <name>jdbc/WSO2REG_LOCAL</name>
        </jndiConfig>
        <definition type="RDBMS">
            <configuration>
                <url>jdbc:mysql:replication://wso2dbmaster:3306,wso2dbslave1:3306,wso2dbslave2:3306/WSO2_REG_LOCAL_AM_GW_MGR_1?roundRobinLoadBalance=true;autoReconnect=true;</url>
                <username>test</username>
                <password>test</password>
                <driverClassName>com.mysql.jdbc.ReplicationDriver</driverClassName>
                <defaultAutoCommit>false</defaultAutoCommit>
                <maxActive>50</maxActive>
                <maxWait>60000</maxWait>
                <testOnBorrow>true</testOnBorrow>
                <validationQuery>SELECT 1</validationQuery>
                <validationInterval>30000</validationInterval>
            </configuration>
        </definition>
    </datasource>
    <datasource>
        <name>WSO2REG_DB</name>
        <description>This shared datasource used for registry</description>
        <jndiConfig>
            <name>jdbc/WSO2REG_DB</name>
        </jndiConfig>
        <definition type="RDBMS">
            <configuration>
                <url>jdbc:mysql:replication://wso2dbmaster:3306,wso2dbslave1:3306,wso2dbslave2:3306/WSO2_REG_DB?roundRobinLoadBalance=true;autoReconnect=true;</url>
                <username>test</username>
                <password>test</password>
                <driverClassName>com.mysql.jdbc.ReplicationDriver</driverClassName>
                <defaultAutoCommit>false</defaultAutoCommit>
                <maxActive>50</maxActive>
                <maxWait>60000</maxWait>
                <testOnBorrow>true</testOnBorrow>
                <validationQuery>SELECT 1</validationQuery>
                <validationInterval>30000</validationInterval>
            </configuration>
        </definition>
    </datasource>

registry.xml配置如下：

<currentDBConfig>wso2registry</currentDBConfig>
<readOnly>false</readOnly>
<enableCache>true</enableCache>
<registryRoot>/</registryRoot>

<dbConfig name="wso2registry">
    <dataSource>jdbc/WSO2REG_LOCAL</dataSource>
</dbConfig>

<dbConfig name="sharedregistry">
    <dataSource>jdbc/WSO2REG_DB</dataSource>
</dbConfig>

<remoteInstance url="https://localhost:9443/registry">
    <id>instanceid</id>
    <dbConfig>sharedregistry</dbConfig>
    <readOnly>false</readOnly>
    <enableCache>true</enableCache>
    <registryRoot>/</registryRoot>
    <cacheId>wso2db@jdbc:mysql:replication://wso2dbmaster:3306,wso2dbslave1:3306,wso2dbslave2:3306/WSO2_REG_DB?roundRobinLoadBalance=true;autoReconnect=true;</cacheId>
</remoteInstance>

启动时出现异常，如下所示。

TID: [0] [AM] [2015-03-09 13:30:51,728] ERROR {org.wso2.carbon.registry.core.internal.RegistryCoreServiceComponent} -  Unable to create fixed remote mounts. {org.wso2.carbon.registry.core.internal.RegistryCoreServiceComponent}

org.wso2.carbon.registry.core.exceptions.RegistryException:执行处理程序链时发生异常。空....447)在org.wso2.carbon.registry.core.jdbc.EmbeddedRegistry.get(EmbeddedRegistry.java:552) at org.wso2.carbon.registry.core.caching.CacheBackedRegistry.get(CacheBackedRegistry.java:180) at org.wso2.carbon.registry.core.session.UserRegistry.get(UserRegistry.java:524) ...

Answer 1

通常，出现此错误的原因是，您将相同的数据库用于本地注册表空间和治理空间。如果您使用与本地和治理注册表空间相同的jdbc/WSO2REG_DB数据库。从定义上讲，它是错误的。在集群中的任何节点之间共享本地注册表空间是不正确的。理想情况下，您可以使用默认的H2数据库作为本地注册表数据库(jdbc/WSO2CarbonDB)。基本上，您需要通过指向H2 db在registry.xml文件中保持以下配置。刚刚发现了一些关于相同错误的blog，这可能会有所帮助。

<currentDBConfig>wso2registry</currentDBConfig>

<dbConfig name="wso2registry"> <dataSource>jdbc/WSO2CarbonDB</dataSource> </dbConfig>