初次撩MYCAT小姐姐

编辑了下SCHEMA.XML

<?xml version="1.0"?>

<!DOCTYPE mycat:schema SYSTEM "schema.dtd">

<mycat:schema xmlns:mycat="http://io.mycat/">

    <schema name="TESTDB" checkSQLschema="false" sqlMaxLimit="100" dataNode="dn1">    <dataNode name="dn1" dataHost="zabbix" database="mycat" />    <dataHost name="zabbix" maxCon="1000" minCon="10" balance="0"          writeType="0" dbType="mysql" dbDriver="native" switchType="1"  slaveThreshold="100">            <heartbeat>select user()</heartbeat>            <writeHost host="zabbix8" url="10.0.8.6:3306" user="root" password="123456">                  <readHost host="hostS2" url="10.0.7.5:3306" user="root" password="123456" />            </writeHost>            <writeHost host="hostS1" url="10.0.7.5:3316" user="root"  password="123456" />              </dataHost>

</mycat:schema>

找了两个MYSQL实例分别是7.5和8.6。逻辑库系统默认的TESTDB

注解了其他逻辑节点，保留1个逻辑节点DN1。

并把逻辑库TESTDB默认关联到DN1。

物理节点组命名为ZABBIX DATABASE=MYCAT。

物理节点组，主库为zabbix8 url 10.0.8.6

从库1 hostS2 10.0.7.5

备用主库 hostS1 10.0.7.5

然后用navicat 分别连接到两个实例，手动创建数据库mycat.

server.xml配置原封不动

            <property name="password">123456</property>            <property name="schemas">TESTDB</property>   </user>    <user name="user">            <property name="password">user</property>            <property name="schemas">TESTDB</property>            <property name="readOnly">true</property>    </user>

默认定义了两个用户ROOT和USER。

第一次撩

[root@DBA_ZABBIX bin]# ./mycat start

Starting Mycat-server...

用SQLYLOG工具连接不成功，小姐姐京瓷了，不让上！

10.0.8.6:8066 root/123456

然后去看日志

[root@DBA_ZABBIX logs]# ll

total 7656

drwxr-xr-x 2 root root 4096 Jun 25 00:00 2019-06

-rw-r--r-- 1 root root 7785434 Jun 24 15:15 bak_01_mycat.log

-rw-r--r-- 1 root root 0 Jun 25 16:38 mycat.log

-rw-r--r-- 1 root root 37227 Jun 25 08:58 switch.log

-rw-r--r-- 1 root root 7202 Jun 25 16:38 wrapper.log

日志为空！

用CONSOLE排查启动错误

[root@DBA_ZABBIX bin]# ./mycat st

Usage: ./mycat { console | start | stop | restart | status | dump }

很烦JAVA日志，搞一大堆无用的字符

比如：at com.sun.org.apache.xerces.internal.

[root@DBA_ZABBIX bin]# ./mycat console

Running Mycat-server...

wrapper | --> Wrapper Started as Console

wrapper | Launching a JVM...

jvm 1 | Wrapper (Version 3.2.3) http://wrapper.tanukisoftware.org

jvm 1 |

jvm 1 | WrapperSimpleApp: Encountered an error running main: java.lang.ExceptionInInitializerError

jvm 1 | java.lang.ExceptionInInitializerError

jvm 1 | at io.mycat.MycatStartup.main(MycatStartup.java:53)

jvm 1 | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

jvm 1 | at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

jvm 1 | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

jvm 1 | at java.lang.reflect.Method.invoke(Method.java:606)

jvm 1 | at org.tanukisoftware.wrapper.WrapperSimpleApp.run(WrapperSimpleApp.java:240)

jvm 1 | at java.lang.Thread.run(Thread.java:745)

jvm 1 | Caused by: io.mycat.config.util.ConfigException: org.xml.sax.SAXParseException; lineNumber: 9; columnNumber: 7; The string "--" is not permitted within comments.

jvm 1 | at io.mycat.config.loader.xml.XMLSchemaLoader.load(XMLSchemaLoader.java:121)

jvm 1 | at io.mycat.config.loader.xml.XMLSchemaLoader.<init>(XMLSchemaLoader.java:78)

jvm 1 | at io.mycat.config.loader.xml.XMLSchemaLoader.<init>(XMLSchemaLoader.java:82)

jvm 1 | at io.mycat.config.ConfigInitializer.<init>(ConfigInitializer.java:76)

jvm 1 | at io.mycat.config.MycatConfig.<init>(MycatConfig.java:72)

jvm 1 | at io.mycat.MycatServer.<init>(MycatServer.java:158)

jvm 1 | at io.mycat.MycatServer.<clinit>(MycatServer.java:101)

jvm 1 | ... 7 more

jvm 1 | Caused by: org.xml.sax.SAXParseException; lineNumber: 9; columnNumber: 7; The string "--" is not permitted within comments.

jvm 1 | at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:198)

jvm 1 | at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.fatalError(ErrorHandlerWrapper.java:177)

jvm 1 | at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:400)

jvm 1 | at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:327)

jvm 1 | at com.sun.org.apache.xerces.internal.impl.XMLScanner.reportFatalError(XMLScanner.java:1465)

jvm 1 | at com.sun.org.apache.xerces.internal.impl.XMLScanner.scanComment(XMLScanner.java:820)

jvm 1 | at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanComment(XMLDocumentFragmentScannerImpl.java:1033)

jvm 1 | at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2979)

jvm 1 | at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:606)

jvm 1 | at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:504)

jvm 1 | at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:848)

jvm 1 | at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:777)

jvm 1 | at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)

jvm 1 | at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:243)

jvm 1 | at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:338)

jvm 1 | at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:121)

jvm 1 | at io.mycat.config.util.ConfigUtil.getDocument(ConfigUtil.java:115)

jvm 1 | at io.mycat.config.loader.xml.XMLSchemaLoader.load(XMLSchemaLoader.java:111)

jvm 1 | ... 13 more

wrapper | <-- Wrapper Stopped

[root@DBA_ZABBIX bin]#

看样子是 SCHMAE.XML 配置有问题，

因为在LINUX 使用VIM 颜色不太好

把其他清理后直接贴配置好的进去。

[root@DBA_ZABBIX bin]# ./mycat console

Running Mycat-server...

wrapper | --> Wrapper Started as Console

wrapper | Launching a JVM...

jvm 1 | Wrapper (Version 3.2.3) http://wrapper.tanukisoftware.org

jvm 1 |

jvm 1 | log4j:WARN No appenders could be found for logger (io.mycat.memory.MyCatMemory).

jvm 1 | log4j:WARN Please initialize the log4j system properly.

jvm 1 | log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

jvm 1 | MyCAT Server startup successfully. see logs in logs/mycat.log

小姐姐终于肯了！

[root@DBA_ZABBIX logs]# ll

total 7700

drwxr-xr-x 2 root root 4096 Jun 25 00:00 2019-06

-rw-r--r-- 1 root root 7785434 Jun 24 15:15 bak_01_mycat.log

-rw-r--r-- 1 root root 26728 Jun 25 16:56 mycat.log

-rw-r--r-- 1 root root 6 Jun 25 16:55 mycat.pid

-rw-r--r-- 1 root root 37319 Jun 25 16:55 switch.log

-rw-r--r-- 1 root root 18565 Jun 25 16:55 wrapper.log

日志也有了

也肯让我上了！

不过空空如也

创建个表试试看

还是有点脾气啊！

checkSQLschema改成TURE

CTRL+C 中断./mycat console mycat 同时也下线。使用start命令让小姐姐再上去

[root@DBA_ZABBIX bin]# ./mycat start

Starting Mycat-server...

表创建成功了！

从另外个工具上看表只在ZABBIX物理上创建了表，7.5没有表！

因为MYCAT不支持多写，也没有搭建主从。那我们人工去创建它就行了。

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