sleuth+zipkin持久化和gateway设置跨域

1.为什么使用sleuth+zipkin持久化

Zipkin Server默认会将追踪数据信息保存到内存，但这种方式不适合生产环境。Zipkin支持将追踪数据持久化到mysql数据库或elasticsearch中。

2.使用mysql实现数据持久化

2.1.创建数据库--省略
2.2.创建表

CREATE TABLE IF NOT EXISTS zipkin_spans (
 `trace_id_high` BIGINT NOT NULL DEFAULT 0 COMMENT 'If non zero, this means the trace uses 128 bit traceIds instead of 64 bit', 
`trace_id` BIGINT NOT NULL, 
`id` BIGINT NOT NULL, 
`name` VARCHAR(255) NOT NULL, 
`parent_id` BIGINT, 
`debug` BIT(1), 
`start_ts` BIGINT COMMENT 'Span.timestamp(): epoch micros used for endTs query and to implement TTL',
`duration` BIGINT COMMENT 'Span.duration(): micros used for minDuration and maxDuration query' )
 ENGINE=InnoDB ROW_FORMAT=COMPRESSED CHARACTER SET=utf8 COLLATE utf8_general_ci;
 
ALTER TABLE zipkin_spans ADD UNIQUE KEY(`trace_id_high`, `trace_id`, `id`) COMMENT 'ignore insert on duplicate'; 
ALTER TABLE zipkin_spans ADD INDEX(`trace_id_high`, `trace_id`, `id`) COMMENT 'for joining with zipkin_annotations'; 
ALTER TABLE zipkin_spans ADD INDEX(`trace_id_high`, `trace_id`) COMMENT 'for getTracesByIds';
 ALTER TABLE zipkin_spans ADD INDEX(`name`) COMMENT 'for getTraces and getSpanNames';
 ALTER TABLE zipkin_spans ADD INDEX(`start_ts`) COMMENT 'for getTraces ordering and range';
CREATE TABLE IF NOT EXISTS zipkin_annotations (
 `trace_id_high` BIGINT NOT NULL DEFAULT 0 COMMENT 'If non zero, this means the trace uses 128 bit traceIds instead of 64 bit', 
`trace_id` BIGINT NOT NULL COMMENT 'coincides with zipkin_spans.trace_id', 
`span_id` BIGINT NOT NULL COMMENT 'coincides with zipkin_spans.id',
 `a_key` VARCHAR(255) NOT NULL COMMENT 'BinaryAnnotation.key or Annotation.value if type == -1', 
`a_value` BLOB COMMENT 'BinaryAnnotation.value(), which must be smaller than 64KB', 
`a_type` INT NOT NULL COMMENT 'BinaryAnnotation.type() or -1 if Annotation', 
`a_timestamp` BIGINT COMMENT 'Used to implement TTL; Annotation.timestamp or zipkin_spans.timestamp',
 `endpoint_ipv4` INT COMMENT 'Null when Binary/Annotation.endpoint is null', 
`endpoint_ipv6` BINARY(16) COMMENT 'Null when Binary/Annotation.endpoint is null, or no IPv6 address', 
`endpoint_port` SMALLINT COMMENT 'Null when Binary/Annotation.endpoint is null',
`endpoint_service_name` VARCHAR(255) COMMENT 'Null when Binary/Annotation.endpoint is null' )
 ENGINE=InnoDB ROW_FORMAT=COMPRESSED CHARACTER SET=utf8 COLLATE utf8_general_ci;
ALTER TABLE zipkin_annotations ADD UNIQUE KEY(`trace_id_high`, `trace_id`, `span_id`, `a_key`, `a_timestamp`) COMMENT 'Ignore insert on duplicate'; 
ALTER TABLE zipkin_annotations ADD INDEX(`trace_id_high`, `trace_id`, `span_id`) COMMENT 'for joining with zipkin_spans'; 
ALTER TABLE zipkin_annotations ADD INDEX(`trace_id_high`, `trace_id`) COMMENT 'for getTraces/ByIds'; 
ALTER TABLE zipkin_annotations ADD INDEX(`endpoint_service_name`) COMMENT 'for getTraces and getServiceNames';
 
ALTER TABLE zipkin_annotations ADD INDEX(`a_type`) COMMENT 'for getTraces';
 ALTER TABLE zipkin_annotations ADD INDEX(`a_key`) COMMENT 'for getTraces'; 
ALTER TABLE zipkin_annotations ADD INDEX(`trace_id`, `span_id`, `a_key`) COMMENT 'for dependencies job';
CREATE TABLE IF NOT EXISTS zipkin_dependencies ( 
`day` DATE NOT NULL, 
`parent` VARCHAR(255) NOT NULL, 
`child` VARCHAR(255) NOT NULL,
 `call_count` BIGINT ) 
ENGINE=InnoDB ROW_FORMAT=COMPRESSED CHARACTER SET=utf8 COLLATE utf8_general_ci; 
ALTER TABLE zipkin_dependencies ADD UNIQUE KEY(`day`, `parent`, `child`);

2.3.在启动ZipKin Server的时候,指定数据保存的mysql的信息

找到自己下载的位置在地址栏输入cmd

2.4.重启一下自己的项目--省略

2.5.访问浏览器

 可以自己在测试一下关闭 ZipKin Server，在重新启动一下看看有没有 ，持久化错了的可能数据库的版本高

3.gateway设置跨域

3.1.设置一个跨域配置类

@Configuration
public class CorsConfig {
  @Bean
  public CorsWebFilter corsFilter() {
            CorsConfiguration config = new CorsConfiguration();
            config.addAllowedMethod("*");
            config.addAllowedOrigin("*");
            config.addAllowedHeader("*");
            UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource(new PathPatternParser());
            source.registerCorsConfiguration("/**", config);
 
            return new CorsWebFilter(source);
  }
}

3.2.或者设置配置文件 

spring:
  cloud:
    gateway:
        globalcors:
          cors-configurations:
            '[/**]':
              allowedOrigins: "*"
              allowedMethods:
              - GET
              - POST
              - DELETE
              - PUT
              - OPTION