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@ -0,0 +1,859 @@
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# Nacos 服务注册
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- nacos-spring-boot-project 中有关服务注册的几个项目
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- nacos-discovery-spring-boot-actuator
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nacos-discovery-spring-boot-autoconfigure
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nacos-discovery-spring-boot-starter
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```properties
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org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
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com.alibaba.boot.nacos.discovery.autoconfigure.NacosDiscoveryAutoConfiguration
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```
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找到注解`NacosDiscoveryAutoConfiguration`
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```java
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@ConditionalOnProperty(name = NacosDiscoveryConstants.ENABLED, matchIfMissing = true)
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@ConditionalOnMissingBean(name = DISCOVERY_GLOBAL_NACOS_PROPERTIES_BEAN_NAME)
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@EnableNacosDiscovery
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@EnableConfigurationProperties(value = NacosDiscoveryProperties.class)
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@ConditionalOnClass(name = "org.springframework.boot.context.properties.bind.Binder")
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public class NacosDiscoveryAutoConfiguration {
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@Bean
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public NacosDiscoveryAutoRegister discoveryAutoRegister() {
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return new NacosDiscoveryAutoRegister();
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}
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}
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```
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- 注解:`EnableNacosDiscovery`
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```java
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@Target({ ElementType.TYPE, ElementType.ANNOTATION_TYPE })
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@Retention(RetentionPolicy.RUNTIME)
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@Documented
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@Import(NacosDiscoveryBeanDefinitionRegistrar.class)
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public @interface EnableNacosDiscovery {}
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```
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- import 类 :`NacosDiscoveryBeanDefinitionRegistrar`
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```java
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public class NacosDiscoveryBeanDefinitionRegistrar
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implements ImportBeanDefinitionRegistrar, EnvironmentAware {
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private Environment environment;
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@Override
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public void registerBeanDefinitions(AnnotationMetadata importingClassMetadata,
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BeanDefinitionRegistry registry) {
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AnnotationAttributes attributes = AnnotationAttributes
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.fromMap(importingClassMetadata
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.getAnnotationAttributes(EnableNacosDiscovery.class.getName()));
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// Register Global Nacos Properties Bean
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registerGlobalNacosProperties(attributes, registry, environment,
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DISCOVERY_GLOBAL_NACOS_PROPERTIES_BEAN_NAME);
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registerGlobalNacosProperties(attributes, registry, environment,
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MAINTAIN_GLOBAL_NACOS_PROPERTIES_BEAN_NAME);
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// Register Nacos Common Beans
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registerNacosCommonBeans(registry);
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// Register Nacos Discovery Beans
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registerNacosDiscoveryBeans(registry);
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}
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@Override
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public void setEnvironment(Environment environment) {
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this.environment = environment;
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}
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}
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```
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- 两个流程
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1. 将注解`EnableNacosDiscovery`的属性读取,放入到 nacos 的全局属性配置中
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2. bean 注入
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## nacos 全局配置属性
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- `com.alibaba.nacos.spring.context.annotation.discovery.NacosDiscoveryBeanDefinitionRegistrar#registerBeanDefinitions`
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- `com.alibaba.nacos.spring.util.NacosBeanUtils#registerGlobalNacosProperties(org.springframework.core.annotation.AnnotationAttributes, org.springframework.beans.factory.support.BeanDefinitionRegistry, org.springframework.core.env.PropertyResolver, java.lang.String)`
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```java
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public static void registerGlobalNacosProperties(AnnotationAttributes attributes,
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BeanDefinitionRegistry registry, PropertyResolver propertyResolver,
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String beanName) {
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if (attributes == null) {
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return; // Compatible with null
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}
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AnnotationAttributes globalPropertiesAttributes = attributes
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.getAnnotation("globalProperties");
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registerGlobalNacosProperties((Map<?, ?>) globalPropertiesAttributes, registry,
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propertyResolver, beanName);
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}
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```
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- 贴出注解上的信息
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```JAVA
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NacosProperties globalProperties() default @NacosProperties(username = USERNAME_PLACEHOLDER, password = PASSWORD_PLACEHOLDER, endpoint = ENDPOINT_PLACEHOLDER, namespace = NAMESPACE_PLACEHOLDER, accessKey = ACCESS_KEY_PLACEHOLDER, secretKey = SECRET_KEY_PLACEHOLDER, serverAddr = SERVER_ADDR_PLACEHOLDER, contextPath = CONTEXT_PATH_PLACEHOLDER, clusterName = CLUSTER_NAME_PLACEHOLDER, encode = ENCODE_PLACEHOLDER);
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```
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- 通过下面这段代码会将注解信息获取到对象`AnnotationAttributes globalPropertiesAttributes`中
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```java
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AnnotationAttributes globalPropertiesAttributes = attributes
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.getAnnotation("globalProperties");
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```
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- 下一段代码是将属性换算出来
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```java
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registerGlobalNacosProperties((Map<?, ?>) globalPropertiesAttributes, registry,
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propertyResolver, beanName)
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public static void registerGlobalNacosProperties(Map<?, ?> globalPropertiesAttributes,
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BeanDefinitionRegistry registry, PropertyResolver propertyResolver,
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String beanName) {
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// 占位符解析成具体的配置信息
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Properties globalProperties = resolveProperties(globalPropertiesAttributes,
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propertyResolver);
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// 单例注册
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registerSingleton(registry, beanName, globalProperties);
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}
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```
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## registerNacosCommonBeans
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```
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public static void registerNacosCommonBeans(BeanDefinitionRegistry registry) {
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// Register NacosApplicationContextHolder Bean
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registerNacosApplicationContextHolder(registry);
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// Register AnnotationNacosInjectedBeanPostProcessor Bean
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registerAnnotationNacosInjectedBeanPostProcessor(registry);
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}
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```
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- 主要方法: registerInfrastructureBean
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1. 定义出bean
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2. 设置构造参数
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3. 注册对象
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```java
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public static void registerInfrastructureBean(BeanDefinitionRegistry registry,
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String beanName, Class<?> beanClass, Object... constructorArgs) {
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// Build a BeanDefinition for NacosServiceFactory class
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// 定义出 bean 根据类型
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BeanDefinitionBuilder beanDefinitionBuilder = BeanDefinitionBuilder
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.rootBeanDefinition(beanClass);
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for (Object constructorArg : constructorArgs) {
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beanDefinitionBuilder.addConstructorArgValue(constructorArg);
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}
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// ROLE_INFRASTRUCTURE
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beanDefinitionBuilder.setRole(BeanDefinition.ROLE_INFRASTRUCTURE);
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// Register
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registry.registerBeanDefinition(beanName,
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beanDefinitionBuilder.getBeanDefinition());
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}
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```
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## @EnableConfigurationProperties(value = NacosDiscoveryProperties.class)
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属性读取，从application配置文件中读取数据转换成java对象。
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## NacosDiscoveryAutoRegister
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```java
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public class NacosDiscoveryAutoRegister
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implements ApplicationListener<WebServerInitializedEvent> {}
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```
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- 处理一个`WebServerInitializedEvent` 事件的方法
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- 重写方法如下，主要工作内容
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1. 把服务发现配置读取出来
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2. 设置一些数据值
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3. 调用服务注册接口
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```java
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@Override
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public void onApplicationEvent(WebServerInitializedEvent event) {
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if (!discoveryProperties.isAutoRegister()) {
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return;
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}
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Register register = discoveryProperties.getRegister();
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if (StringUtils.isEmpty(register.getIp())) {
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register.setIp(NetUtils.localIP());
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}
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if (register.getPort() == 0) {
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register.setPort(event.getWebServer().getPort());
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}
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register.getMetadata().put("preserved.register.source", "SPRING_BOOT");
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register.setInstanceId("");
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String serviceName = register.getServiceName();
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if (StringUtils.isEmpty(serviceName)){
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if (StringUtils.isEmpty(applicationName)){
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throw new AutoRegisterException("serviceName notNull");
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}
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serviceName = applicationName;
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}
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try {
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namingService.registerInstance(serviceName, register.getGroupName(),
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register);
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logger.info("Finished auto register service : {}, ip : {}, port : {}",
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serviceName, register.getIp(), register.getPort());
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} catch (NacosException e) {
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throw new AutoRegisterException(e);
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}
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}
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```
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- 注册的参数
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## 服务注册
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- 注册一个实例
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1. 将 instance 对象转换成 BeatInfo 对象
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2. 注册实例
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```java
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@Override
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public void registerInstance(String serviceName, String groupName, Instance instance) throws NacosException {
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if (instance.isEphemeral()) {
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// 实例信息转换
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BeatInfo beatInfo = new BeatInfo();
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beatInfo.setServiceName(NamingUtils.getGroupedName(serviceName, groupName));
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beatInfo.setIp(instance.getIp());
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beatInfo.setPort(instance.getPort());
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beatInfo.setCluster(instance.getClusterName());
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beatInfo.setWeight(instance.getWeight());
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beatInfo.setMetadata(instance.getMetadata());
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beatInfo.setScheduled(false);
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beatInfo.setPeriod(instance.getInstanceHeartBeatInterval());
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// 插入这条实例的信息
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beatReactor.addBeatInfo(NamingUtils.getGroupedName(serviceName, groupName),
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beatInfo);
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}
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serverProxy.registerService(NamingUtils.getGroupedName(serviceName, groupName), groupName, instance);
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}
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```
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- addBeatInfo
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- 创建了一个定时任务 BeatTask
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```java
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public void addBeatInfo(String serviceName, BeatInfo beatInfo) {
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NAMING_LOGGER.info("[BEAT] adding beat: {} to beat map.", beatInfo);
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String key = buildKey(serviceName, beatInfo.getIp(), beatInfo.getPort());
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BeatInfo existBeat = null;
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//fix #1733
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if ((existBeat = dom2Beat.remove(key)) != null) {
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existBeat.setStopped(true);
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}
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dom2Beat.put(key, beatInfo);
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executorService.schedule(new BeatTask(beatInfo), beatInfo.getPeriod(), TimeUnit.MILLISECONDS);
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MetricsMonitor.getDom2BeatSizeMonitor().set(dom2Beat.size());
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}
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```
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### BeatTask
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```
|
|
|
|
|
class BeatTask implements Runnable {
|
|
|
|
|
|
|
|
|
|
BeatInfo beatInfo;
|
|
|
|
|
|
|
|
|
|
public BeatTask(BeatInfo beatInfo) {
|
|
|
|
|
this.beatInfo = beatInfo;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
@Override
|
|
|
|
|
public void run() {
|
|
|
|
|
if (beatInfo.isStopped()) {
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
long nextTime = beatInfo.getPeriod();
|
|
|
|
|
try {
|
|
|
|
|
// 与nacos进行一次rest请求交互
|
|
|
|
|
JSONObject result = serverProxy.sendBeat(beatInfo, BeatReactor.this.lightBeatEnabled);
|
|
|
|
|
long interval = result.getIntValue("clientBeatInterval");
|
|
|
|
|
boolean lightBeatEnabled = false;
|
|
|
|
|
if (result.containsKey(CommonParams.LIGHT_BEAT_ENABLED)) {
|
|
|
|
|
lightBeatEnabled = result.getBooleanValue(CommonParams.LIGHT_BEAT_ENABLED);
|
|
|
|
|
}
|
|
|
|
|
BeatReactor.this.lightBeatEnabled = lightBeatEnabled;
|
|
|
|
|
if (interval > 0) {
|
|
|
|
|
nextTime = interval;
|
|
|
|
|
}
|
|
|
|
|
int code = NamingResponseCode.OK;
|
|
|
|
|
if (result.containsKey(CommonParams.CODE)) {
|
|
|
|
|
code = result.getIntValue(CommonParams.CODE);
|
|
|
|
|
}
|
|
|
|
|
// 如果nacos找不到当前实例,
|
|
|
|
|
if (code == NamingResponseCode.RESOURCE_NOT_FOUND) {
|
|
|
|
|
Instance instance = new Instance();
|
|
|
|
|
instance.setPort(beatInfo.getPort());
|
|
|
|
|
instance.setIp(beatInfo.getIp());
|
|
|
|
|
instance.setWeight(beatInfo.getWeight());
|
|
|
|
|
instance.setMetadata(beatInfo.getMetadata());
|
|
|
|
|
instance.setClusterName(beatInfo.getCluster());
|
|
|
|
|
instance.setServiceName(beatInfo.getServiceName());
|
|
|
|
|
instance.setInstanceId(instance.getInstanceId());
|
|
|
|
|
instance.setEphemeral(true);
|
|
|
|
|
try {
|
|
|
|
|
// 执行注册服务
|
|
|
|
|
serverProxy.registerService(beatInfo.getServiceName(),
|
|
|
|
|
NamingUtils.getGroupName(beatInfo.getServiceName()), instance);
|
|
|
|
|
} catch (Exception ignore) {
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
} catch (NacosException ne) {
|
|
|
|
|
NAMING_LOGGER.error("[CLIENT-BEAT] failed to send beat: {}, code: {}, msg: {}",
|
|
|
|
|
JSON.toJSONString(beatInfo), ne.getErrCode(), ne.getErrMsg());
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
executorService.schedule(new BeatTask(beatInfo), nextTime, TimeUnit.MILLISECONDS);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
- 定时任务说明
|
|
|
|
|
1. 和nacos进行一次交互，根据交互结果的code判断,如果不在nacos会执行注册.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
- 发送请求的方法
|
|
|
|
|
|
|
|
|
|
```java
|
|
|
|
|
public String reqAPI(String api, Map<String, String> params, String body, List<String> servers, String method) throws NacosException {
|
|
|
|
|
|
|
|
|
|
params.put(CommonParams.NAMESPACE_ID, getNamespaceId());
|
|
|
|
|
|
|
|
|
|
if (CollectionUtils.isEmpty(servers) && StringUtils.isEmpty(nacosDomain)) {
|
|
|
|
|
throw new NacosException(NacosException.INVALID_PARAM, "no server available");
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
NacosException exception = new NacosException();
|
|
|
|
|
|
|
|
|
|
if (servers != null && !servers.isEmpty()) {
|
|
|
|
|
|
|
|
|
|
Random random = new Random(System.currentTimeMillis());
|
|
|
|
|
int index = random.nextInt(servers.size());
|
|
|
|
|
|
|
|
|
|
for (int i = 0; i < servers.size(); i++) {
|
|
|
|
|
// 获取nacos所在的ip+port地址
|
|
|
|
|
String server = servers.get(index);
|
|
|
|
|
try {
|
|
|
|
|
// 进行请求
|
|
|
|
|
return callServer(api, params, body, server, method);
|
|
|
|
|
} catch (NacosException e) {
|
|
|
|
|
exception = e;
|
|
|
|
|
if (NAMING_LOGGER.isDebugEnabled()) {
|
|
|
|
|
NAMING_LOGGER.debug("request {} failed.", server, e);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
index = (index + 1) % servers.size();
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (StringUtils.isNotBlank(nacosDomain)) {
|
|
|
|
|
for (int i = 0; i < UtilAndComs.REQUEST_DOMAIN_RETRY_COUNT; i++) {
|
|
|
|
|
try {
|
|
|
|
|
return callServer(api, params, body, nacosDomain, method);
|
|
|
|
|
} catch (NacosException e) {
|
|
|
|
|
exception = e;
|
|
|
|
|
if (NAMING_LOGGER.isDebugEnabled()) {
|
|
|
|
|
NAMING_LOGGER.debug("request {} failed.", nacosDomain, e);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
NAMING_LOGGER.error("request: {} failed, servers: {}, code: {}, msg: {}",
|
|
|
|
|
api, servers, exception.getErrCode(), exception.getErrMsg());
|
|
|
|
|
|
|
|
|
|
throw new NacosException(exception.getErrCode(), "failed to req API:/api/" + api + " after all servers(" + servers + ") tried: "
|
|
|
|
|
+ exception.getMessage());
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
**学习点**
|
|
|
|
|
|
|
|
|
|
- 这里采用随机值作为第一个server的获取，主要目的是为了将请求随机分配给不同的nacos服务
|
|
|
|
|
|
|
|
|
|
如果直接使用for循环的索引那第一台nacos服务会收到所有的请求，直到这台服务坏了才会请求第二台
|
|
|
|
|
|
|
|
|
|
Random random = new Random(System.currentTimeMillis());
|
|
|
|
|
int index = random.nextInt(servers.size());
|
|
|
|
|
|
|
|
|
|
for (int i = 0; i < servers.size(); i++) {
|
|
|
|
|
// 获取nacos所在的ip+port地址
|
|
|
|
|
String server = servers.get(index);
|
|
|
|
|
try {
|
|
|
|
|
// 进行请求
|
|
|
|
|
return callServer(api, params, body, server, method);
|
|
|
|
|
} catch (NacosException e) {
|
|
|
|
|
exception = e;
|
|
|
|
|
if (NAMING_LOGGER.isDebugEnabled()) {
|
|
|
|
|
NAMING_LOGGER.debug("request {} failed.", server, e);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
index = (index + 1) % servers.size();
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
### registerService
|
|
|
|
|
|
|
|
|
|
- 注册方法就是请求一次接口，将数据发送给nacos就完成了
|
|
|
|
|
|
|
|
|
|
```java
|
|
|
|
|
public void registerService(String serviceName, String groupName, Instance instance) throws NacosException {
|
|
|
|
|
|
|
|
|
|
NAMING_LOGGER.info("[REGISTER-SERVICE] {} registering service {} with instance: {}",
|
|
|
|
|
namespaceId, serviceName, instance);
|
|
|
|
|
|
|
|
|
|
final Map<String, String> params = new HashMap<String, String>(9);
|
|
|
|
|
params.put(CommonParams.NAMESPACE_ID, namespaceId);
|
|
|
|
|
params.put(CommonParams.SERVICE_NAME, serviceName);
|
|
|
|
|
params.put(CommonParams.GROUP_NAME, groupName);
|
|
|
|
|
params.put(CommonParams.CLUSTER_NAME, instance.getClusterName());
|
|
|
|
|
params.put("ip", instance.getIp());
|
|
|
|
|
params.put("port", String.valueOf(instance.getPort()));
|
|
|
|
|
params.put("weight", String.valueOf(instance.getWeight()));
|
|
|
|
|
params.put("enable", String.valueOf(instance.isEnabled()));
|
|
|
|
|
params.put("healthy", String.valueOf(instance.isHealthy()));
|
|
|
|
|
params.put("ephemeral", String.valueOf(instance.isEphemeral()));
|
|
|
|
|
params.put("metadata", JSON.toJSONString(instance.getMetadata()));
|
|
|
|
|
|
|
|
|
|
reqAPI(UtilAndComs.NACOS_URL_INSTANCE, params, HttpMethod.POST);
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
- 服务注册的接口
|
|
|
|
|
- `/nacos/v1/ns/instance`
|
|
|
|
|
- `/nacos/v1/ns/instance/beat`
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
- 接下来去寻找这两个接口的实现
|
|
|
|
|
|
|
|
|
|
`com.alibaba.nacos.naming.controllers.InstanceController`
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
## nacos 服务端
|
|
|
|
|
|
|
|
|
|
### 实例注册
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
```java
|
|
|
|
|
public void registerInstance(String namespaceId, String serviceName, Instance instance) throws NacosException {
|
|
|
|
|
// 创建空服务
|
|
|
|
|
createEmptyService(namespaceId, serviceName, instance.isEphemeral());
|
|
|
|
|
|
|
|
|
|
Service service = getService(namespaceId, serviceName);
|
|
|
|
|
|
|
|
|
|
if (service == null) {
|
|
|
|
|
throw new NacosException(NacosException.INVALID_PARAM,
|
|
|
|
|
"service not found, namespace: " + namespaceId + ", service: " + serviceName);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
addInstance(namespaceId, serviceName, instance.isEphemeral(), instance);
|
|
|
|
|
}
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
- 创建空服务的流程
|
|
|
|
|
|
|
|
|
|
- 获取服务对象
|
|
|
|
|
|
|
|
|
|
nacos 的服务信息存储在
|
|
|
|
|
|
|
|
|
|
`com.alibaba.nacos.naming.core.ServiceManager#serviceMap`
|
|
|
|
|
|
|
|
|
|
```java
|
|
|
|
|
private Map<String, Map<String, Service>> serviceMap = new ConcurrentHashMap<>();
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
```java
|
|
|
|
|
public void createServiceIfAbsent(String namespaceId, String serviceName, boolean local, Cluster cluster) throws NacosException {
|
|
|
|
|
// 获取服务信息
|
|
|
|
|
Service service = getService(namespaceId, serviceName);
|
|
|
|
|
if (service == null) {
|
|
|
|
|
|
|
|
|
|
Loggers.SRV_LOG.info("creating empty service {}:{}", namespaceId, serviceName);
|
|
|
|
|
service = new Service();
|
|
|
|
|
service.setName(serviceName);
|
|
|
|
|
service.setNamespaceId(namespaceId);
|
|
|
|
|
service.setGroupName(NamingUtils.getGroupName(serviceName));
|
|
|
|
|
// now validate the service. if failed, exception will be thrown
|
|
|
|
|
service.setLastModifiedMillis(System.currentTimeMillis());
|
|
|
|
|
service.recalculateChecksum();
|
|
|
|
|
if (cluster != null) {
|
|
|
|
|
cluster.setService(service);
|
|
|
|
|
service.getClusterMap().put(cluster.getName(), cluster);
|
|
|
|
|
}
|
|
|
|
|
service.validate();
|
|
|
|
|
|
|
|
|
|
putServiceAndInit(service);
|
|
|
|
|
if (!local) {
|
|
|
|
|
addOrReplaceService(service);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
- 在了解map结构后不难理解下面这个获取Service的方法了
|
|
|
|
|
|
|
|
|
|
```JAVA
|
|
|
|
|
public Service getService(String namespaceId, String serviceName) {
|
|
|
|
|
if (serviceMap.get(namespaceId) == null) {
|
|
|
|
|
return null;
|
|
|
|
|
}
|
|
|
|
|
return chooseServiceMap(namespaceId).get(serviceName);
|
|
|
|
|
}
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
```java
|
|
|
|
|
private void putServiceAndInit(Service service) throws NacosException {
|
|
|
|
|
putService(service);
|
|
|
|
|
service.init();
|
|
|
|
|
consistencyService.listen(KeyBuilder.buildInstanceListKey(service.getNamespaceId(), service.getName(), true), service);
|
|
|
|
|
consistencyService.listen(KeyBuilder.buildInstanceListKey(service.getNamespaceId(), service.getName(), false), service);
|
|
|
|
|
Loggers.SRV_LOG.info("[NEW-SERVICE] {}", service.toJSON());
|
|
|
|
|
}
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
- 把服务加入map对象
|
|
|
|
|
|
|
|
|
|
```java
|
|
|
|
|
public void putService(Service service) {
|
|
|
|
|
if (!serviceMap.containsKey(service.getNamespaceId())) {
|
|
|
|
|
synchronized (putServiceLock) {
|
|
|
|
|
if (!serviceMap.containsKey(service.getNamespaceId())) {
|
|
|
|
|
serviceMap.put(service.getNamespaceId(), new ConcurrentHashMap<>(16));
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
serviceMap.get(service.getNamespaceId()).put(service.getName(), service);
|
|
|
|
|
}
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
- init 方法设置了一个数据验证的任务 ， 并且在集群中设置service信息
|
|
|
|
|
|
|
|
|
|
```java
|
|
|
|
|
public void init() {
|
|
|
|
|
|
|
|
|
|
HealthCheckReactor.scheduleCheck(clientBeatCheckTask);
|
|
|
|
|
|
|
|
|
|
for (Map.Entry<String, Cluster> entry : clusterMap.entrySet()) {
|
|
|
|
|
entry.getValue().setService(this);
|
|
|
|
|
entry.getValue().init();
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
- 再往后添加两个key的监听
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
- addInstance 方法
|
|
|
|
|
|
|
|
|
|
```java
|
|
|
|
|
public void addInstance(String namespaceId, String serviceName, boolean ephemeral, Instance... ips) throws NacosException {
|
|
|
|
|
|
|
|
|
|
String key = KeyBuilder.buildInstanceListKey(namespaceId, serviceName, ephemeral);
|
|
|
|
|
|
|
|
|
|
Service service = getService(namespaceId, serviceName);
|
|
|
|
|
|
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synchronized (service) {
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List<Instance> instanceList = addIpAddresses(service, ephemeral, ips);
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Instances instances = new Instances();
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instances.setInstanceList(instanceList);
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consistencyService.put(key, instances);
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}
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}
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```
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- 简单理解 consistencyService 结构信息
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- key： 定义的一个名字
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- value : 实例的列表
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### 实例健康检查
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- 获取实例独享, 从 service 中根据集群名称获取实例列表 ， 再根据ip + 端口 返回实例对象
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```java
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Instance instance = serviceManager.getInstance(namespaceId, serviceName, clusterName, ip, port);
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```
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```java
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public Instance getInstance(String namespaceId, String serviceName, String cluster, String ip, int port) {
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Service service = getService(namespaceId, serviceName);
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if (service == null) {
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return null;
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}
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List<String> clusters = new ArrayList<>();
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clusters.add(cluster);
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List<Instance> ips = service.allIPs(clusters);
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if (ips == null || ips.isEmpty()) {
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return null;
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}
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for (Instance instance : ips) {
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if (instance.getIp().equals(ip) && instance.getPort() == port) {
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return instance;
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}
|
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}
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return null;
|
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}
|
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```
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|
- 实例健康检查接口做的事件
|
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|
|
|
1. 获取实例
|
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|
|
1. 实例不存在注册实例
|
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|
|
2. 获取服务
|
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|
|
1. 服务不存在抛出异常
|
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|
|
2. 服务存在执行一个心跳方法
|
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|
|
3. 组装结果返回
|
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|
|
```java
|
|
|
|
|
@CanDistro
|
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|
|
|
@PutMapping("/beat")
|
|
|
|
|
@Secured(parser = NamingResourceParser.class, action = ActionTypes.WRITE)
|
|
|
|
|
public JSONObject beat(HttpServletRequest request) throws Exception {
|
|
|
|
|
|
|
|
|
|
JSONObject result = new JSONObject();
|
|
|
|
|
|
|
|
|
|
result.put("clientBeatInterval", switchDomain.getClientBeatInterval());
|
|
|
|
|
String serviceName = WebUtils.required(request, CommonParams.SERVICE_NAME);
|
|
|
|
|
String namespaceId = WebUtils.optional(request, CommonParams.NAMESPACE_ID,
|
|
|
|
|
Constants.DEFAULT_NAMESPACE_ID);
|
|
|
|
|
String clusterName = WebUtils.optional(request, CommonParams.CLUSTER_NAME,
|
|
|
|
|
UtilsAndCommons.DEFAULT_CLUSTER_NAME);
|
|
|
|
|
String ip = WebUtils.optional(request, "ip", StringUtils.EMPTY);
|
|
|
|
|
int port = Integer.parseInt(WebUtils.optional(request, "port", "0"));
|
|
|
|
|
String beat = WebUtils.optional(request, "beat", StringUtils.EMPTY);
|
|
|
|
|
|
|
|
|
|
RsInfo clientBeat = null;
|
|
|
|
|
if (StringUtils.isNotBlank(beat)) {
|
|
|
|
|
clientBeat = JSON.parseObject(beat, RsInfo.class);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (clientBeat != null) {
|
|
|
|
|
if (StringUtils.isNotBlank(clientBeat.getCluster())) {
|
|
|
|
|
clusterName = clientBeat.getCluster();
|
|
|
|
|
}
|
|
|
|
|
ip = clientBeat.getIp();
|
|
|
|
|
port = clientBeat.getPort();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (Loggers.SRV_LOG.isDebugEnabled()) {
|
|
|
|
|
Loggers.SRV_LOG.debug("[CLIENT-BEAT] full arguments: beat: {}, serviceName: {}", clientBeat, serviceName);
|
|
|
|
|
}
|
|
|
|
|
// 获取实例
|
|
|
|
|
Instance instance = serviceManager.getInstance(namespaceId, serviceName, clusterName, ip, port);
|
|
|
|
|
|
|
|
|
|
if (instance == null) {
|
|
|
|
|
if (clientBeat == null) {
|
|
|
|
|
result.put(CommonParams.CODE, NamingResponseCode.RESOURCE_NOT_FOUND);
|
|
|
|
|
return result;
|
|
|
|
|
}
|
|
|
|
|
instance = new Instance();
|
|
|
|
|
instance.setPort(clientBeat.getPort());
|
|
|
|
|
instance.setIp(clientBeat.getIp());
|
|
|
|
|
instance.setWeight(clientBeat.getWeight());
|
|
|
|
|
instance.setMetadata(clientBeat.getMetadata());
|
|
|
|
|
instance.setClusterName(clusterName);
|
|
|
|
|
instance.setServiceName(serviceName);
|
|
|
|
|
instance.setInstanceId(instance.getInstanceId());
|
|
|
|
|
instance.setEphemeral(clientBeat.isEphemeral());
|
|
|
|
|
|
|
|
|
|
serviceManager.registerInstance(namespaceId, serviceName, instance);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
Service service = serviceManager.getService(namespaceId, serviceName);
|
|
|
|
|
|
|
|
|
|
if (service == null) {
|
|
|
|
|
throw new NacosException(NacosException.SERVER_ERROR,
|
|
|
|
|
"service not found: " + serviceName + "@" + namespaceId);
|
|
|
|
|
}
|
|
|
|
|
if (clientBeat == null) {
|
|
|
|
|
clientBeat = new RsInfo();
|
|
|
|
|
clientBeat.setIp(ip);
|
|
|
|
|
clientBeat.setPort(port);
|
|
|
|
|
clientBeat.setCluster(clusterName);
|
|
|
|
|
}
|
|
|
|
|
// 处理心跳方法
|
|
|
|
|
service.processClientBeat(clientBeat);
|
|
|
|
|
|
|
|
|
|
result.put(CommonParams.CODE, NamingResponseCode.OK);
|
|
|
|
|
result.put("clientBeatInterval", instance.getInstanceHeartBeatInterval());
|
|
|
|
|
result.put(SwitchEntry.LIGHT_BEAT_ENABLED, switchDomain.isLightBeatEnabled());
|
|
|
|
|
return result;
|
|
|
|
|
}
|
|
|
|
|
```
|
huifer
4 years ago
