Spring Boot进阶之水平扩展

作者: 诺之林 | 来源:发表于2018-04-13 14:45 被阅读171次

本文的示例代码参考MultiServices

Nginx

Installation

brew install nginx

sed -i "" 's/8080/80/g' /usr/local/etc/nginx/nginx.conf

sudo brew services start nginx

brew services list

测试

curl localhost

<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
    body {
        width: 35em;
        margin: 0 auto;
        font-family: Tahoma, Verdana, Arial, sans-serif;
    }
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>

<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>

<p><em>Thank you for using nginx.</em></p>
</body>
</html>

Prepare

mkdir Nginx

# cd Nginx
spring init -b 1.5.6.RELEASE -dweb --build gradle Service1

spring init -b 1.5.6.RELEASE -dweb --build gradle Service2

Service1

# cd Service1
vim src/main/java/com/example/Service1/DemoController.java

package com.example.Service1;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class DemoController {
    @GetMapping("/demo")
    public String demo() {
        return "Service1: " + "demo";
    }
}

echo "server.port=9000" >> src/main/resources/application.properties

测试

./gradlew bootrun

curl localhost:9000/demo # 返回"Service1: demo"

Service2

# cd Service2
vim src/main/java/com/example/Service2/DemoController.java

package com.example.Service2;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class DemoController {
    @GetMapping("/demo")
    public String demo() {
        return "Service2: " + "demo";
    }
}

echo "server.port=9001" >> src/main/resources/application.properties

测试

./gradlew bootrun

curl localhost:9001/demo # 返回"Service2: demo"

Configuration

sudo vim /usr/local/etc/nginx/nginx.conf

# add lines
upstream ms {
    server 127.0.0.1:9000;
    server 127.0.0.1:9001;
}

server {
    listen 80;
    server_name multiservices.test;
    location / {
        proxy_pass http://ms;
    }
}

sudo nginx -s reload

sudo sh -c "echo '127.0.0.1 multiservices.test' >> /etc/hosts"

测试

curl multiservices.test/demo # 返回"Service2: demo"

curl multiservices.test/demo # 返回"Service1: demo"

ZooKeeper

Installation

brew install zookeeper

brew services start zookeeper

brew services list

测试

zkCli

Connecting to localhost:2181
Welcome to ZooKeeper!
JLine support is enabled
[zk: localhost:2181(CONNECTING) 0] 
WATCHER::

WatchedEvent state:SyncConnected type:None path:null

Prepare

mkdir ZooKeeper

# cd ZooKeeper
spring init -b 1.5.6.RELEASE -dweb --build gradle Provider1

spring init -b 1.5.6.RELEASE -dweb --build gradle Provider2

spring init -b 1.5.6.RELEASE -dweb --build gradle Consumer

Provider1

# cd Provider1
vim build.gradle

# add lines
dependencies {
    compile('org.springframework.boot:spring-boot-starter-web')
    compile('org.springframework.cloud:spring-cloud-starter-zookeeper-discovery')
    testCompile('org.springframework.boot:spring-boot-starter-test')
}

dependencyManagement {
    imports {
        mavenBom "org.springframework.cloud:spring-cloud-dependencies:Edgware.SR3"
    }
}

sed -i "" '/SpringBootApplication;/a\
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
' src/main/java/com/example/Provider1/DemoApplication.java

sed -i "" '/@SpringBootApplication/a\
@EnableDiscoveryClient
' src/main/java/com/example/Provider1/DemoApplication.java

vim src/main/java/com/example/Provider1/DemoController.java

package com.example.Provider1;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class DemoController {
    @GetMapping("/demo")
    public String demo() {
        return "Provider1: " + "demo";
    }
}

mv src/main/resources/application.properties src/main/resources/application.yml

tee src/main/resources/application.yml <<-'EOF'
spring:
  application:
    name: Provider
  cloud:
    zookeeper:
      connect-string: localhost:2181
      discovery:
        enabled: true
server:
  port: 9000
EOF

测试

./gradlew bootrun

[localhost:2181)] org.apache.zookeeper.ClientCnxn          : Opening socket connection to server localhost/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
[localhost:2181)] org.apache.zookeeper.ClientCnxn          : Socket connection established to localhost/127.0.0.1:2181, initiating session
[localhost:2181)] org.apache.zookeeper.ClientCnxn          : Session establishment complete on server localhost/127.0.0.1:2181, sessionid = 0x162bc7bf0510009, negotiated timeout = 40000

curl localhost:9000/demo # 返回"Provider1: demo"

Provider2

# cd Provider2
vim build.gradle

# add lines
dependencies {
    compile('org.springframework.boot:spring-boot-starter-web')
    compile('org.springframework.cloud:spring-cloud-starter-zookeeper-discovery')
    testCompile('org.springframework.boot:spring-boot-starter-test')
}

dependencyManagement {
    imports {
        mavenBom "org.springframework.cloud:spring-cloud-dependencies:Edgware.SR3"
    }
}

sed -i "" '/SpringBootApplication;/a\
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
' src/main/java/com/example/Provider2/DemoApplication.java

sed -i "" '/@SpringBootApplication/a\
@EnableDiscoveryClient
' src/main/java/com/example/Provider2/DemoApplication.java

vim src/main/java/com/example/Provider2/DemoController.java

package com.example.Provider2;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class DemoController {
    @GetMapping("/demo")
    public String demo() {
        return "Provider2: " + "demo";
    }
}

mv src/main/resources/application.properties src/main/resources/application.yml

tee src/main/resources/application.yml <<-'EOF'
spring:
  application:
    name: Provider
  cloud:
    zookeeper:
      connect-string: localhost:2181
      discovery:
        enabled: true
server:
  port: 9001
EOF

测试

./gradlew bootrun

[localhost:2181)] org.apache.zookeeper.ClientCnxn          : Opening socket connection to server localhost/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
[localhost:2181)] org.apache.zookeeper.ClientCnxn          : Socket connection established to localhost/127.0.0.1:2181, initiating session
[localhost:2181)] org.apache.zookeeper.ClientCnxn          : Session establishment complete on server localhost/127.0.0.1:2181, sessionid = 0x162bc7bf0510009, negotiated timeout = 40000

curl localhost:9001/demo # 返回"Provider2: demo"

Consumer

# cd Consumer
vim build.gradle

# add lines
dependencies {
    compile('org.springframework.boot:spring-boot-starter-web')
    compile('org.springframework.cloud:spring-cloud-starter-zookeeper-discovery')
    compile('org.springframework.cloud:spring-cloud-starter-openfeign')
    testCompile('org.springframework.boot:spring-boot-starter-test')
}

dependencyManagement {
    imports {
        mavenBom "org.springframework.cloud:spring-cloud-dependencies:Edgware.SR3"
    }
}

sed -i "" '/SpringBootApplication;/a\
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
' src/main/java/com/example/Consumer/DemoApplication.java

sed -i "" '/@SpringBootApplication/a\
@EnableDiscoveryClient
' src/main/java/com/example/Consumer/DemoApplication.java

sed -i "" '/EnableDiscoveryClient;/a\
import org.springframework.cloud.netflix.feign.EnableFeignClients;
' src/main/java/com/example/Consumer/DemoApplication.java

sed -i "" '/@EnableDiscoveryClient/a\
@EnableFeignClients
' src/main/java/com/example/Consumer/DemoApplication.java

vim src/main/java/com/example/Consumer/DemoController.java

package com.example.Consumer;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class DemoController {
    @GetMapping("/demo")
    public String demo() {
        return "Consumer: " + "demo";
    }
}

测试

./gradlew bootrun

curl localhost:8080/demo # 返回"Consumer: demo"

vim src/main/java/com/example/Consumer/ProviderClient.java

package com.example.Consumer;

import org.springframework.cloud.netflix.feign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;

@FeignClient("Provider")
public interface ProviderClient {
    @GetMapping("/demo")
    String demo();
}

vim src/main/java/com/example/Consumer/DemoController.java

// 省略了包名和导入文件

@RestController
public class DemoController {
    @Autowired
    private ProviderClient providerClient;

    @GetMapping("/demo")
    public String demo() {
        return providerClient.demo();
    }
}

测试

./gradlew bootrun

curl localhost:8080/demo # 返回"Provider1: demo"

curl localhost:8080/demo # 返回"Provider2: demo"

参考

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Spring Boot进阶之水平扩展

目录

Nginx

Installation

Prepare

Service1

Service2

Configuration

ZooKeeper

Installation

Prepare

Provider1

Provider2

Consumer

参考

相关文章

网友评论

延伸阅读

深度阅读

栏目导航

热点阅读

我爱编程

Spring Boot进阶 之 水平扩展

目录

Nginx

Installation

Prepare

Service1

Service2

Configuration

ZooKeeper

Installation

Prepare

Provider1

Provider2

Consumer

参考

相关文章

网友评论

延伸阅读

深度阅读

栏目导航

热点阅读

我爱编程

Spring Boot进阶之水平扩展