Nacos配置及常见问题

Posted 2021-04-05 善战者无功

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一、应用环境

Nacos：1.2.0

mysql：8.0.16

OS：Win10

二、Nacos安装配置

1、解压（默认端口8848），

2、\conf\application.properties：

最上方增加server.contextPath=/nacos

配置MySQL数据库连接

3、导入数据库脚本

4、默认不支持mysql8：替换\target\nacos-server.jar

5、启动\bin\startup.cmd

6、启动成功后窗口显示Nacos版本、模式、端口、进程号、访问地址、官网信息，进入

http://localhost:8848/nacos/index.html

默认账户nacos/nacos

7、建立命名空间

点击左侧菜单“命名空间”、右上角“新建命名空间”按钮，创建命名空间

命名空间信息：查找数据库表tenant_info，tenant_id（命名空间ID）、tenant_name（命名空间名称）、tenant_desc（命名空间描述）

三、nacos-server.jar

1、nacos1.2.0默认只支持MySQL5，不支持MySQL8，所以需要修改源代码自己编译

2、源代码地址： https://github.com/alibaba/nacos.git

3、修改代码：

(1) pom.xml

 <dependency> <groupId>commons-dbcp</groupId> <artifactId>commons-dbcp</artifactId> <version>1.4</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.34</version> </dependency>

改为

 <dependency> <groupId>org.apache.commmons</groupId> <artifactId>commons-dbcp2</artifactId> <version>2.7.0</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.16</version> </dependency>

(2) api/pom.xml、client/pom.xml、common/pom.xml

 <configuration> <source>6</source> <target>6</target> </configuration>

改为

 <configuration> <source>1.8</source> <target>1.8</target> </configuration>

(3) config/pom.xml

        <dependency> <groupId>commons-dbcp</groupId> <artifactId>commons-dbcp</artifactId> </dependency>

改为

 <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-dbcp2</artifactId> </dependency>

(4) com.alibaba.nacos.config.server.service.BaseDataSourceServiceImpl.java、com.alibaba.nacos.config.server.service.LocalDataSourceServiceImpl.java

import org.apache.commons.dbcp.BasicDataSource;ds.setMaxActiveds.setMaxWait

改为

import org.apache.commons.dbcp2.BasicDataSource;ds.setMaxTotalds.setMaxWaitMillis

(5) console/src/main/resources/META-INFO/nacos-default.properties

db.url.0=jdbc:mysql://11.162.196.161:3306/diamond_devtest?characterEncoding=utf8&connectTimeout=1000&socketTimeout=3000&autoReconnect=truedb.url.1=jdbc:mysql://11.163.152.91:3306/diamond_devtest?characterEncoding=utf8&connectTimeout=1000&socketTimeout=3000&autoReconnect=true

改为

db.url.0=jdbc:mysql://11.162.196.161:3306/diamond_devtest?serverTimezone=GMT%2B8characterEncoding=utf8&connectTimeout=1000&socketTimeout=3000&autoReconnect=truedb.url.1=jdbc:mysql://11.163.152.91:3306/diamond_devtest?serverTimezone=GMT%2B8characterEncoding=utf8&connectTimeout=1000&socketTimeout=3000&autoReconnect=true

(6) com.alibaba.nacos.naming.healthcheck.MysqlHealthCheckProcessor.java

import com.mysql.jdbc.jdbc2.optional.MysqlDataSource;

改为

import com.mysql.cj.jdbc.MysqlDataSource;

4、编译打包

根目录下的BUILDING文件有详细说明。

mvn -Prelease-nacos -Dmaven.test.skip=true clean install -U

编译成功后，从distribution/target/nacos-server-1.2.0/nacos/target文件夹拷取目标文件nacos-server.jar

四、常见问题

1、如果在Eclipse中修改完上述代码后仍有如下编译错误

错误代码：

The type 'XXX' is not API...

修改Windows->Preferences->Java->Compiler->Errors/Warning->Deprecated And restricted API->Forbidden reference选项为Warning

2、如果项目启动时报错如下

Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured. Reason: Failed to determine a suitable driver class  Action: Consider the following: If you want an embedded database (H2, HSQL or Derby), please put it on the classpath. If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active).