springcloud-consul

简介：consul是一个开源分布式服务发现的配置管理系统，提供服务治理、配置中心、控制总线等功能。这些功能中的每个都可以单独使用，也可以一起使用

能做什么：服务发现：提供HTTP和DNS两种发现方法，

健康检测：支持多种方式，HTTP，TCP，Docker，Shell加班定制化，

kv存储：key，value的存储方式，

多数据中心：consel支持多数据中心，

可视化web界面

安装下载：

[root@centos79644centos consul]# wget https://releases.hashicorp.com/consul/1.9.2/consul_1.9.2_linux_amd64.zip--2023-06-12 23:26:36--  https://releases.hashicorp.com/consul/1.9.2/consul_1.9.2_linux_amd64.zip正在分析主机 releases.hashicorp.com (releases.hashicorp.com)... 13.226.120.110, 13.226.120.68, 13.226.120.47, ...正在连接 releases.hashicorp.com (releases.hashicorp.com)|13.226.120.110|:443... 已连接。已发出 HTTP 请求，等待回应... 200 OK长度：41313084 (39M) [application/zip]保存至： “consul_1.9.2_linux_amd64.zip”100%[==========================================================================================================================================>] 41,313,084  3.21MB/s 用时 20s2023-06-12 23:26:58 (1.95 MB/s) - 已保存 “consul_1.9.2_linux_amd64.zip” [41313084/41313084])

解压目录

[root@centos79644centos4centos consul]# unzip consul_1.9.2_linux_amd64.zipArchive:  consul_1.9.2_linux_amd64.zip  inflating: consul                  [root@centos79644centos4centos consul]# lsconsul  consul_1.9.2_linux_amd64.zip

启动

[root@centos79644centos consul]# ./consulUsage: consul [--version] [--help] <command> [<args>]Available commands are:    acl            Interact with Consul's ACLs

开发环境启动命令如下(默认为8500端口)：

./consul agent -dev -client=0.0.0.0 -ui

浏览器访问：192.168.133.13:8500

使用consul

创建服务提供商：paymentmain8006，创建项目时已选择搜索consul，自动注入，pom文件加入依赖：

<dependency>   <groupId>org.springframework.boot</groupId>   <artifactId>spring-boot-starter-web</artifactId></dependency><dependency>   <groupId>org.springframework.cloud</groupId>   <artifactId>spring-cloud-starter-consul-discovery</artifactId></dependency><dependency>   <groupId>org.springframework.boot</groupId>   <artifactId>spring-boot-starter-test</artifactId>   <scope>test</scope></dependency>

配置文件：application.yml

server:  port: 8006springpring:  application:    name: consul-provider-payment  cloud:    consul:      host: 192.168.133.130 # ??????      port: 8500          # ??????      discovery:        register: true                                # ????        instance-id: ${spring.application.name}-01    # ???? id ????        service-name: ${spring.application.name}     # ????        port: ${server.port}                          # ????        prefer-ip-address: true                       # ???? ip ??        ip-address: ${spring.cloud.client.ip-address} # ???? ip        heartbeat:          enabled: true

在主启动类上加注:@EnableDiscoveryClient

@SpringBootApplication@EnableDiscoveryClientpublic class paymentmain8006aplication {   public static void main(String[] args) {      SpringApplication.run(paymentmain8006aplication.class, args);   }}

创建controler

@RestController@RequestMapping("/payment")public class PaymentController {    @Value("${server.port}")    private String port;    @RequestMapping("/consul")    public String getPort(){        return "spring-boot-consul的端口号是:"+port;    }}

创建服务调用方：ordermainconsul90，创建时加入依赖，服务提供商和调用方依赖相同，pom.xml

dependency>    <groupId>org.springframework.boot</groupId>    <artifactId>spring-boot-starter-web</artifactId></dependency><dependency>    <groupId>org.springframework.cloud</groupId>    <artifactId>spring-cloud-starter-consul-discovery</artifactId></dependency><dependency>    <groupId>org.springframework.boot</groupId>    <artifactId>spring-boot-starter-test</artifactId>    <scope>test</scope></dependency>

application.yml

server:  port: 90spring:  application:    name: cloud-consumer-order  cloud:    consul:      host: 192.168.133.130 # ???      port: 8500          # ??????      discovery:        register: false                               # ????        instance-id: ${spring.application.name}-01    # ???? id ????        service-name: ${spring.application.name}     # ????        port: ${server.port}                          # ????        prefer-ip-address: true                       # ???? ip ??        ip-address: ${spring.cloud.client.ip-address} # ???? ip        heartbeat:          enabled: true                               # ????????

在主启动类中加载注释@EnableDiscoveryClient

@SpringBootApplication@EnableDiscoveryClientpublic class OrderMainconsul90aplication {    public static void main(String[] args) {        SpringApplication.run(OrderMainconsul90aplication.class, args);    }}

创建Restemplatetetet bean对象

@Configurationpublic class OrderConfig {    @Bean    @LoadBalanced///不加总是报错java.net.UnknownHostException: consul-provider-payment，自己试一下    public RestTemplate getRestTemplate(){        return new RestTemplate();    }}

创建controler

@RestControllerpublic class OrderConsulController {    @Autowired    RestTemplate restTemplate;    private static final String INVOKE_URL = "http://consul-provider-payment";    @RequestMapping("/getOrder")    public String getOrder(){        return restTemplate.getForObject(INVOKE_URL+"/payment/consul",String.class);    }}

使用浏览器或postman：http://localhost:90/getOrder