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
vim /etc/hosts
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
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
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>
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
@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
