美文网首页
SpringCloudAlibaba学习实战

SpringCloudAlibaba学习实战

作者: 笔记本一号 | 来源:发表于2021-05-16 17:17 被阅读0次

一、高可用nacos搭建

搭建方案：使用haproxy做为nacos节点的负载均衡器，部署三个nacos节点，分别是192.168.200.133、192.168.200.134、192.168.200.135，负载均衡端口是16443，各个nacos节点的端口是8850

高可用server端 nacos配置

下载压缩包 分别上传到192.168.200.133、192.168.200.134、192.168.200.135，并解压 各个节点配置host 
vim /etc/hosts
这里是133的节点的host 各个节点都进入nacos的config目录配置文件,修改cluster.conf 然后在修改application..properties
启动mysql，这里我是用docker启动的，然后在mysql下创建nacos_config表

启动各个节点的nacos

sh /home/software/nacos-8850/bin/startup.sh

haproxy配置

 cat /etc/haproxy/haproxy.cfg

global
    # to have these messages end up in /var/log/haproxy.log you will
    # need to:
    #
    # 1) configure syslog to accept network log events.  This is done
    #    by adding the '-r' option to the SYSLOGD_OPTIONS in
    #    /etc/sysconfig/syslog
    #
    # 2) configure local2 events to go to the /var/log/haproxy.log
    #   file. A line like the following can be added to
    #   /etc/sysconfig/syslog
    #
    #    local2.*                       /var/log/haproxy.log
    #
    log         127.0.0.1 local2

    chroot      /var/lib/haproxy
    pidfile     /var/run/haproxy.pid
    maxconn     4000
    user        haproxy
    group       haproxy
    daemon

    # turn on stats unix socket
    stats socket /var/lib/haproxy/stats

#---------------------------------------------------------------------
# common defaults that all the 'listen' and 'backend' sections will
# use if not designated in their block
#---------------------------------------------------------------------
defaults
    mode                    http
    log                     global
    option                  httplog
    option                  dontlognull
    option http-server-close
    option forwardfor       except 127.0.0.0/8
    option                  redispatch
    retries                 3
    timeout http-request    10s
    timeout queue           1m
    timeout connect         10s
    timeout client          1m
    timeout server          1m
    timeout http-keep-alive 10s
    timeout check           10s
    maxconn                 3000

#---------------------------------------------------------------------
# main frontend which proxys to the backends
#---------------------------------------------------------------------
frontend  app
    bind                  *:16443
    mode                   tcp
    option                 tcplog
    default_backend        app

#---------------------------------------------------------------------
# round robin balancing between the various backends
#---------------------------------------------------------------------
backend app
    balance     roundrobin
    server master133  192.168.200.133:8850 check
    server master134  192.168.200.134:8850 check
    server master135  192.168.200.135:8850 check

启动haproxy并开机自起

systemctl enable haproxy &&  systemctl start haproxy

访问http://192.168.200.133:16443/nacos/index.html,nacos的高可用完成

高可用client端 nacos配置

在同一个应用名称下部署两个节点，这里由于条件有限，我只能使用同一个节点地址下的不同端口代表不同的节点

server:
  port: 8080
spring:
  profiles: clientA01
  application:
    name: clientA
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    name: defaultDataSource
    url: jdbc:mysql://localhost:3306/employees?serverTimezone=UTC
    username: root
    password: 123456
  cloud:
    nacos:
      discovery:
        username: nacos
        password: nacos
        server-addr: 192.168.200.133:8850,192.168.200.134:8850,192.168.200.135:8850
        namespace: public
---
server:
  port: 8081
spring:
  profiles: clientA02
  application:
    name: clientA
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    name: defaultDataSource
    url: jdbc:mysql://localhost:3306/employees?serverTimezone=UTC
    username: root
    password: 123456
  cloud:
    nacos:
      discovery:
        username: nacos
        password: nacos
        server-addr: 192.168.200.133:8850,192.168.200.134:8850,192.168.200.135:8850
        namespace: public
根据不同的profile条件，选择不同的环境 分别启动clientA01和clientA02 看看nacos的前端界面，部署成功

二、集群的负载均衡器 Ribbon

springcloud已经与Ribbon进行了整合，我们只需要在RestTemplate上进行配置，Ribbon能够将注册列表的实例进行负载均衡

@SpringBootApplication
public class NacostestApplication {

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

    @LoadBalanced
    @Bean
    public RestTemplate restTemplate() {
        return new RestTemplate();
    }
}

获取服务端口号的工具类

@Configuration
public class ServiceInfoUtil implements ApplicationListener<WebServerInitializedEvent> {
    private int serverPort;

    @Override
    public void onApplicationEvent(WebServerInitializedEvent event) {
        this.serverPort = event.getWebServer().getPort();
    }

    public int getPort() {
        return this.serverPort;
    }
}

Controller层

@RestController
@Slf4j
public class TestController {
    @Autowired
    private RestTemplate restTemplate;

    @Autowired
    private DiscoveryClient discoveryClient;

    //获取被调用服务的端口的工具类
    @Autowired
    private ServiceInfoUtil serviceInfoUtil;

    //提供给服务消费端的接口
    @GetMapping("/provide")
    public void test(){
        List<String> services = discoveryClient.getServices();
        log.info("服务消费:【{}】,端口号：【{}】",services,serviceInfoUtil.getPort());
    }

    //服务消费端的消费接口
    @GetMapping("/consummer")
    public String consummer(){
        return restTemplate.getForEntity("http://clientA/provide",String.class).getBody();
    }
}

我们启动一个消费者的服务

server:
  port: 8082
spring:
  profiles: consummerA
  application:
    name: consummerA
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    name: defaultDataSource
    url: jdbc:mysql://localhost:3306/employees?serverTimezone=UTC
    username: root
    password: 123456
  cloud:
    nacos:
      discovery:
        username: nacos
        password: nacos
        server-addr: 192.168.200.133:8850,192.168.200.134:8850,192.168.200.135:8850
        namespace: public
logging:
  config: classpath:log4j2.xml
启动消费者服务器，然后在重启两个clientA 消费端访问http://localhost:8082/consummer，服务打到了端口为8080的clientA上 消费端再次访问http://localhost:8082/consummer，服务打到了端口为8081的clientA上 证明负载均衡是生效的

三、熔断限流 sentinel

下载安装sentinel 
java -jar sentinel-dashboard-1.8.0.jar

引入sentinel依赖

<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
</dependency>
访问http://192.168.200.133:8080/，由于sentinel是懒加载，所以刚刚启动什么都看不到，只有请求了接口才能看到内容

四、调用链监控 sleuth和zipking

https://www.cnblogs.com/jiawen010/articles/10948552.html
https://www.cnblogs.com/itgaofei/p/9353054.html

curl -sSL https://zipkin.io/quickstart.sh | bash -s
nohup java -jar zipkin.jar  > zipking.log  2>&1 &

访问：http://192.168.200.133:9411/
引入依赖，由于zipkin已经包含sleuth，所以可以将sleuth的依赖移除

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zipkin</artifactId>
        </dependency>

配置

server:
  port: 8080
spring:
  profiles: clientA01
  application:
    name: clientA
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    name: defaultDataSource
    url: jdbc:mysql://localhost:3306/employees?serverTimezone=UTC
    username: root
    password: 123456
  cloud:
    sentinel:
      transport:
        dashboard: 192.168.200.133:8080
    nacos:
      discovery:
        username: nacos
        password: nacos
        server-addr: 192.168.200.133:8850,192.168.200.134:8850,192.168.200.135:8850
        namespace: public
  zipkin:
    base-url: http://192.168.200.133:9411
  sleuth:
    sampler:
      probability: 1.0
logging:
  config: classpath:log4j2.xml

五、服务网关 gateway

可以做到统一用户认证，达到了不需要在每个模块都做一次登录授权的功能，另外统一管理服务接口对外暴露一个统一的域名，有利于系统的后期的重构或迁移，内部服务如何变化对外部无感知，减少运维的成本

server:
  port: 8083
spring:
  application:
    name: gateway
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    name: defaultDataSource
    url: jdbc:mysql://localhost:3306/employees?serverTimezone=UTC
    username: root
    password: 123456
  cloud:
    sentinel:
      transport:
        dashboard: 192.168.200.133:8080
    nacos:
      discovery:
        username: nacos
        password: nacos
        server-addr: 192.168.200.133:8850,192.168.200.134:8850,192.168.200.135:8850
        namespace: public
    gateway:
      discovery:
        locator:
          enabled: true
      routes:
        - id: clientA
          uri: lb://clientA
          predicates:
            - Path=/clientA/**

        - id: consummerA
          uri: lb://consummerA
          predicates:
            - Path=/consummerA/**

访问：http://localhost:8083/consummerA/consummer 即可转发到consummerA应用下的/consummer接口

六、配置管理 nacos-config

spring:
  application:
    name: consummerA
  profiles: consummerA
  cloud:
    nacos:
      config:
        server-addr: 192.168.200.133:8850,192.168.200.134:8850,192.168.200.135:8850
        file-extension: yaml
到nacos上添加配置 
@RestController
@Slf4j
public class TestController {
    //获取被调用服务的端口的工具类
    @Autowired
    private ServiceInfoUtil serviceInfoUtil;

    @Value("${test.config}")
    private String config;

    @GetMapping("/getconfig")
    public String getconfig(){
        return config;
    }
}

访问：http://localhost:8083/consummerA/getconfig

另外在配置中心里content-center.yaml是所有应用通用的配置，data id为content-center.yaml时，无论应用处于何种环境或者是服务名称都能拿到配置

相关文章

网友评论

      本文标题：SpringCloudAlibaba学习实战

      本文链接：https://www.haomeiwen.com/subject/cjbhjltx.html

      延伸阅读

      深度阅读

      • 您也可以注册成为美文阅读网的作者，发表您的原创作品、分享您的心情！

      栏目导航

      热点阅读

      关于我们|服务条款|联系我们|SpringCloudAlibaba学习实战|投稿指南|网站地图|RSS订阅|排版工具|手机版

      提供经典美文摘抄,优美散文欣赏,现代诗歌精选,短篇小说,心情随笔,表白情书范文,故事会在线阅读欣赏

      Copyright © 2014-2023 Haomeiwen.com All Rights Reserved. 好美文阅读网 版权所有

      备案信息：桂公网安备 45052102000051号 · 桂ICP备13007215号-3

      本站所收录作品、热点评论等信息部分来源互联网，目的只是为了系统归纳学习和传递资讯

      所有作品版权归原创作者所有，与本站立场无关，如不慎侵犯了你的权益，请联系我们告知，我们将做删除处理！