谷粒商城18-注册“gulimall-gateway”服务到Nacos

桃扇骨 2023-03-04 06:46 8阅读 0赞

### 文章目录 ###

*   *   *  创建“gulimall-gateway”模块
         *  添加“gulimall-common”依赖和“spring-cloud-starter-gateway”依赖到网关的模块
         *  “com.atguigu.gulimall.gateway.GulimallGatewayApplication”类上加上“@EnableDiscoveryClient”注解
         *  在Nacos中创建“gateway”命名空间，同时在该命名空间中创建“gulimall-gateway.yml”
         *  创建“bootstrap.properties”文件，添加如下配置，指明配置中心地址和所属命名空间
         *  创建“application.properties”文件，指定服务名和注册中心地址
         *  启动“gulimall-gateway”

### 创建“gulimall-gateway”模块 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMjI5NjY5_size_16_color_FFFFFF_t_70][]  
选中网关  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMjI5NjY5_size_16_color_FFFFFF_t_70 1][]

### 添加“gulimall-common”依赖和“spring-cloud-starter-gateway”依赖到网关的模块 ###

网关也需要注册到注册到nacos中, 去发现其他的服务. 修改SpringBoot的版本和Cloud的版本.  
完整的依赖如下

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.1.8.RELEASE</version>
            <relativePath/> 
        </parent>
        <groupId>com.atguigu.gulimall</groupId>
        <artifactId>gulimall-gateway</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <name>gulimall-gateway</name>
        <description>API网关</description>
    
        <properties>
            <java.version>1.8</java.version>
            <spring-cloud.version>Greenwich.SR3</spring-cloud.version>
        </properties>
    
        <dependencies>
            <dependency>
                <groupId>com.atguigu.gulimall</groupId>
                <artifactId>gulimall-common</artifactId>
                <version>0.0.1-SNAPSHOT</version>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-gateway</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
                <exclusions>
                    <exclusion>
                        <groupId>org.junit.vintage</groupId>
                        <artifactId>junit-vintage-engine</artifactId>
                    </exclusion>
                </exclusions>
            </dependency>
        </dependencies>
    
        <dependencyManagement>
            <dependencies>
                <dependency>
                    <groupId>org.springframework.cloud</groupId>
                    <artifactId>spring-cloud-dependencies</artifactId>
                    <version>${spring-cloud.version}</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
            </dependencies>
        </dependencyManagement>
    
        <build>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                </plugin>
            </plugins>
        </build>
    
    </project>

### “com.atguigu.gulimall.gateway.GulimallGatewayApplication”类上加上“@EnableDiscoveryClient”注解 ###

用于把网关服务注册到nacos中

@EnableDiscoveryClient
    @SpringBootApplication(exclude = { DataSourceAutoConfiguration.class})
    public class GulimallGatewayApplication { 
    
        public static void main(String[] args) { 
            SpringApplication.run(GulimallGatewayApplication.class, args);
        }
    
    }

### 在Nacos中创建“gateway”命名空间，同时在该命名空间中创建“gulimall-gateway.yml” ###

![20200801205057403.png][]  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMjI5NjY5_size_16_color_FFFFFF_t_70 2][]

### 创建“bootstrap.properties”文件，添加如下配置，指明配置中心地址和所属命名空间 ###

spring.application.name=gulimall-coupon
    # 配置中心的地址 nacos的地址
    spring.cloud.nacos.config.server-addr=127.0.0.1:8848
    spring.cloud.nacos.config.namespace=84b360ac-5522-48e9-8a3a-a11660bef309

### 创建“application.properties”文件，指定服务名和注册中心地址 ###

spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848
    spring.application.name=gulimall-gateway
    server.port=88

### 启动“gulimall-gateway” ###

启动报错：

Description:
    
    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

原因是引用了common模块, 而该模块是有mybatis的配置的, 启动的时候,就会去找数据源相关的配置. 而网关是不需要数据源的. 因此可以在启动类中,把数据源自动配置类去除.  
解决方法：在“GulimallGatewayApplication”中排除和数据源相关的配置

![2020080120523572.png][]  
重新启动  
访问：http://192.168.137.14:8848/nacos/\#，查看到该服务已经注册到了Nacos中  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMjI5NjY5_size_16_color_FFFFFF_t_70 3][]  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMjI5NjY5_size_16_color_FFFFFF_t_70 4][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMjI5NjY5_size_16_color_FFFFFF_t_70]: /images/20230208/048208695fd947a8927de9a7afcbf921.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMjI5NjY5_size_16_color_FFFFFF_t_70 1]: /images/20230208/a55909204ab040639dc7127ef8312255.png
[20200801205057403.png]: /images/20230208/70840f338e954bef939c7964d63558ba.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMjI5NjY5_size_16_color_FFFFFF_t_70 2]: /images/20230208/81701c738dab48d8b32cd42c15746710.png
[2020080120523572.png]: /images/20230208/b6e05a8022454818bb044bddcfb8e210.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMjI5NjY5_size_16_color_FFFFFF_t_70 3]: /images/20230208/b5925f5065484a4cb30c7926de933ecc.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMjI5NjY5_size_16_color_FFFFFF_t_70 4]: /images/20230208/2870d3d925a442e99e8ba0e644bec5e4.png