失眠网 > 全链路追踪神器-Skywalking实战教程

全链路追踪神器-Skywalking实战教程

时间：2020-03-16 04:37:59

01 什么是 SkyWalking

SkyWalking 是观察性分析平台和应用性能管理系统。

提供分布式追踪、服务网格遥测分析、度量聚合和可视化一体化解决方案。

架构：

02 环境搭建

安装下载部署

1、下载

地址：/zh/downloads/

2、安装

下载解压后目录如下：

不需要修改配置文件，在bin目录下执行startup.bat或startup.sh即可启动服务：

执行startup.bat之后会启动如下两个服务：

Skywalking-Collector：

追踪信息收集器，通过 gRPC/Http 收集客户端的采集信息，Http默认端口 12800，gRPC默认端口 11800。

Skywalking-Webapp：

管理平台页面默认端口 8080，登录信息 admin/admin

3、配置信息

（1）收集器相关配置：支持 http/gRPC收集

core:default:restHost: ${SW_CORE_REST_HOST:0.0.0.0}restPort: ${SW_CORE_REST_PORT:12800}restContextPath: ${SW_CORE_REST_CONTEXT_PATH:/}gRPCHost: ${SW_CORE_GRPC_HOST:0.0.0.0}gRPCPort: ${SW_CORE_GRPC_PORT:11800}downsampling:- Hour- Day- Month# Set a timeout on metric data. After the timeout has expired, the metric data will automatically be deleted.recordDataTTL: ${SW_CORE_RECORD_DATA_TTL:90} # Unit is minuteminuteMetricsDataTTL: ${SW_CORE_MINUTE_METRIC_DATA_TTL:90} # Unit is minutehourMetricsDataTTL: ${SW_CORE_HOUR_METRIC_DATA_TTL:36} # Unit is hourdayMetricsDataTTL: ${SW_CORE_DAY_METRIC_DATA_TTL:45} # Unit is daymonthMetricsDataTTL: ${SW_CORE_MONTH_METRIC_DATA_TTL:18} # Unit is month

（2）收集信息存储：支持h2和 ES

storage:h2:driver: ${SW_STORAGE_H2_DRIVER:org.h2.jdbcx.JdbcDataSource}url: ${SW_STORAGE_H2_URL:jdbc:h2:mem:skywalking-oap-db}user: ${SW_STORAGE_H2_USER:sa}# elasticsearch:# # nameSpace: ${SW_NAMESPACE:""}# clusterNodes: ${SW_STORAGE_ES_CLUSTER_NODES:localhost:9200}# indexShardsNumber: ${SW_STORAGE_ES_INDEX_SHARDS_NUMBER:2}# indexReplicasNumber: ${SW_STORAGE_ES_INDEX_REPLICAS_NUMBER:0}# # Batch process setting, refer to https://www.elastic.co/guide/en/elasticsearch/client/java-api/5.5/java-docs-bulk-processor.html# bulkActions: ${SW_STORAGE_ES_BULK_ACTIONS:2000} # Execute the bulk every 2000 requests# bulkSize: ${SW_STORAGE_ES_BULK_SIZE:20} # flush the bulk every 20mb# flushInterval: ${SW_STORAGE_ES_FLUSH_INTERVAL:10} # flush the bulk every 10 seconds whatever the number of requests# concurrentRequests: ${SW_STORAGE_ES_CONCURRENT_REQUESTS:2} # the number of concurrent requests

(3)可采集信息：jvm运行相关信息，zipkin追踪日志等。

receiver-register:default:receiver-trace:default:bufferPath: ${SW_RECEIVER_BUFFER_PATH:../trace-buffer/} # Path to trace buffer files, suggest to use absolute pathbufferOffsetMaxFileSize: ${SW_RECEIVER_BUFFER_OFFSET_MAX_FILE_SIZE:100} # Unit is MBbufferDataMaxFileSize: ${SW_RECEIVER_BUFFER_DATA_MAX_FILE_SIZE:500} # Unit is MBbufferFileCleanWhenRestart: ${SW_RECEIVER_BUFFER_FILE_CLEAN_WHEN_RESTART:false}sampleRate: ${SW_TRACE_SAMPLE_RATE:10000} # The sample rate precision is 1/10000. 10000 means 100% sample in default.receiver-jvm:default:#service-mesh:# default:# bufferPath: ${SW_SERVICE_MESH_BUFFER_PATH:../mesh-buffer/} # Path to trace buffer files, suggest to use absolute path# bufferOffsetMaxFileSize: ${SW_SERVICE_MESH_OFFSET_MAX_FILE_SIZE:100} # Unit is MB# bufferDataMaxFileSize: ${SW_SERVICE_MESH_BUFFER_DATA_MAX_FILE_SIZE:500} # Unit is MB# bufferFileCleanWhenRestart: ${SW_SERVICE_MESH_BUFFER_FILE_CLEAN_WHEN_RESTART:false}#istio-telemetry:# default:#receiver_zipkin:# default:# host: ${SW_RECEIVER_ZIPKIN_HOST:0.0.0.0}# port: ${SW_RECEIVER_ZIPKIN_PORT:9411}# contextPath: ${SW_RECEIVER_ZIPKIN_CONTEXT_PATH:/}

03 页面介绍

访问地址：http://localhost:8080/

首页：

调用关系

服务调用信息

追踪日志信息

04 Agent 使用示例

Skywalking 采用Java 探针技术（java agent 博客），对客户端应用程序没有任何代码侵入，使用起来简单方便，当然其具体实现就是需要针对不同的框架及服务提供探针插件。

使用命令：

java -javaagent:G:\github\incubator-skywalking\skywalking-agent\skywalking-agent.jar-Dskywalking.agent.service_name=test -jar app.jar

这样就可以完成对目前应用 app.jar 的监控

Tomcat 监控