cartoon's blog
0%

Eureka服务端与客户端搭建

Posted on Edited on

前言

这段时间在构建自己的开发工具集，避不开的就是各种中间件访问层的搭建。而 spring cloud 唯二绕不开的就是 eureka 了，所以就重复造轮子，以后忘记了也有所参考。

正文

前期准备

maven/gradle

eureka 服务器搭建

  1. 新建 spring boot 空项目

    这一步其实是非必要的，你也可以新建 maven/gradle 空项目或者普通的 web项目， 只是 spring boot 的自动配置比较方便。

  2. 修改 pom.xml 或者 build.gradle 文件（此处示例为 pom.xml 文件）

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    36
    37
    38
    39
    40
    41
    42
    43
    44
    45
    46
    47
    48
    49
    50
    51
    52
    53
    54
    55
    56
    57
    58
    59
    60
    61
    62
    63
    64
    65
    66
    67
    68
    69
    70
    71
    <?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>2.3.4.RELEASE</version>
            <relativePath/> <!-- lookup parent from repository -->
        </parent>
        <groupId>com</groupId>
        <artifactId>eureka</artifactId>
        <version>1.0.0</version>
        <name>eureka</name>
        <description>Demo project for Spring Boot</description>

        <properties>
            <java.version>1.8</java.version>
            <spring-cloud.version>Hoxton.SR8</spring-cloud.version>
        </properties>

        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-eureka-server</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.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>3.8.1</version>
                    <configuration>
                        <source>1.8</source>
                        <target>1.8</target>
                        <encoding>UTF-8</encoding>
                    </configuration>
                </plugin>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                </plugin>
            </plugins>
        </build>
    </project>

  3. 修改项目配置文件 application.yml

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    server:
      port: 8761
    eureka:
      instance:
        hostname: eureka-server
      client:
        register-with-eureka: false
        fetch-registry: false
        service-url:
          defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

  4. 启动类增加 @EnableEurekaServer 注解

    1
    2
    3
    4
    5
    6
    7
    8
    9
    @EnableEurekaServer
    @SpringBootApplication
    public class EurekaApplication {

        public static void main(String[] args) {
            SpringApplication.run(EurekaApplication.class, args);
        }

    }

经过上述步骤启动项目，eureka服务器就启动完成了。

服务提供者与消费者构建

服务提供者构建
  1. 新建 spring boot 空项目
  2. 修改 pom.xml 或者 build.gradle 文件（此处示例为 pom.xml 文件）
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
<?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>2.3.4.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com</groupId>
    <artifactId>eurekaclient</artifactId>
    <version>1.0.0</version>
    <name>EurekaClient</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Hoxton.SR8</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</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.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>
  1. 修改项目配置文件 application.yml
1
2
3
4
5
6
7
eureka:
  client:
    service-url:
      defaultZone: http://cartoon-ali.com:6001/eureka/   # 取决于你的eureka地址
spring:
  application:
    name: DemoProducer
  1. 新建模拟接口
1
2
3
4
5
6
7
8
@RestController
public class TextController {

    @GetMapping("text")
    public String text(){
        return "eureka producer";
    }
}
服务消费者构建
  1. 新建 spring boot 空项目
  2. 修改 pom.xml 或者 build.gradle 文件（此处示例为 pom.xml 文件）
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
<?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>2.3.4.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>org</groupId>
    <artifactId>eurekaclient2</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>eurekaclient2</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Hoxton.SR8</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</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>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </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.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>
  1. 修改项目配置文件 application.yml
1
2
3
4
5
6
7
8
9
eureka:
  client:
    service-url:
      defaultZone: http://cartoon-ali.com:6001/eureka/    # 取决于你的eureka地址
spring:
  application:
    name: DemoConsumer
server:
  port: 8081
  1. 模拟消费接口构建
1
2
3
4
5
6
7
8
9
10
11
12
@RestController
public class TextController {

    @Autowired
    private RestTemplate restTemplate;

    @RequestMapping("/text")
    public String text(){
        return restTemplate.getForObject("http://DEMOPRODUCER/text", String.class);
    }
}

启动

同时启动服务提供者与消费者，调用消费者模拟消费接口，即能看到调用的结果。

后记

项目代码已收录在我的个人工具集。因为我在工具集全面应用了 easyopen 做接口的收拢，所以关于 eureka 相关的内容可能有点不一样，但是总体步骤是一样的，欢迎 star

&nbsp;&nbsp;&nbsp;&nbsp;本文首发于 cartoon的博客
&nbsp;&nbsp;&nbsp;&nbsp;转载请注明出处:https://cartoonyu.github.io/cartoon-blog/post/spring-cloud/Eureka服务端与客户端搭建/