延伸扩展：XX核心业务场景

路由标签打标、传播、检索

链路标签染色与传播

SW: SkyWalking的简写

1. 用户请求携带HTTP头信息X-sw8-correlation
   • "X-sw8-correlation: key1=value1,key2=value2,key3=value3"
2. 网关侧读取解析HTTP头信息X-sw8-correlation，然后通过SW的关联上下文传播
   • ContextManager.getCorrelationContext().put(key, value)
     • SW插件使用
   • TraceContext.putCorrelation(key, value)
     • 应用使用
3. 上游业务应用通过SW的关联上下文传播路由标签
   • CorrelationContext

业务应用通过属性变量设置SW关联上下文的Span跨度标签键的集合，进行自动打标搜索。

• JVM启动参数属性: java -Dskywalking.correlation.auto_tag_keys=autotag1,autotag2
• 环境变量: SW_CORRELATION_AUTO_TAG_KEYS=autotag1,autotag2

应用变更

• apm-gateway-trace-plugin，SW插件，feature/guangyi/20240531_span_tag_sw8_correlation分支
  • 网关应用java代理
• 链路标签染色与传播

使用示例

链路标签数据检索

{"query":"query queryTraces(condition: TraceQueryCondition) {\n data: queryBasicTraces(condition: condition) {\n traces {\n key: segmentId\n endpointNames\n duration\n start\n isError\n traceIds\n }\n }}","variables":{"condition":{"queryDuration":{"start":"2024-06-03 0624","end":"2024-06-03 0654","step":"MINUTE"},"traceState":"ALL","queryOrder":"BY_START_TIME","paging":{"pageNum":1,"pageSize":20},"tags":[{"key":"http.status_code","value":"200"}],"minTraceDuration":null,"maxTraceDuration":null,"serviceId":"bGVmaXQtdXNlcnx8cHJvZA==.1","serviceInstanceId":"bGVmaXQtdXNlcnx8cHJvZA==.1_YmRiZGU2MTMyM2NmNGVmMDhmNDYyNzQxOWY1MDg1ZDNAMTkyLjE2OC4xMDcuMjA4"}}}

参考