Skywalking实战教程，全链路追踪神器！

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：http://skywalking.apache.org/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

 1 core:
 2 
 3   default:
 4 
 5     restHost: ${SW_CORE_REST_HOST:0.0.0.0}
 6 
 7     restPort: ${SW_CORE_REST_PORT:12800}
 8 
 9     restContextPath: ${SW_CORE_REST_CONTEXT_PATH:/}
10 
11     gRPCHost: ${SW_CORE_GRPC_HOST:0.0.0.0}
12 
13     gRPCPort: ${SW_CORE_GRPC_PORT:11800}
14 
15     downsampling:
16 
17     - Hour
18 
19     - Day
20 
21     - Month
22 
23     # Set a timeout on metric data. After the timeout has expired, the metric data will automatically be deleted.
24 
25     recordDataTTL: ${SW_CORE_RECORD_DATA_TTL:90} # Unit is minute
26 
27     minuteMetricsDataTTL: ${SW_CORE_MINUTE_METRIC_DATA_TTL:90} # Unit is minute
28 
29     hourMetricsDataTTL: ${SW_CORE_HOUR_METRIC_DATA_TTL:36} # Unit is hour
30 
31     dayMetricsDataTTL: ${SW_CORE_DAY_METRIC_DATA_TTL:45} # Unit is day
32 
33     monthMetricsDataTTL: ${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。

 1 receiver-register:
 2 
 3   default:
 4 
 5 receiver-trace:
 6 
 7   default:
 8 
 9     bufferPath: ${SW_RECEIVER_BUFFER_PATH:../trace-buffer/}  # Path to trace buffer files, suggest to use absolute path
10 
11     bufferOffsetMaxFileSize: ${SW_RECEIVER_BUFFER_OFFSET_MAX_FILE_SIZE:100} # Unit is MB
12 
13     bufferDataMaxFileSize: ${SW_RECEIVER_BUFFER_DATA_MAX_FILE_SIZE:500} # Unit is MB
14 
15     bufferFileCleanWhenRestart: ${SW_RECEIVER_BUFFER_FILE_CLEAN_WHEN_RESTART:false}
16 
17     sampleRate: ${SW_TRACE_SAMPLE_RATE:10000} # The sample rate precision is 1/10000. 10000 means 100% sample in default.
18 
19 receiver-jvm:
20 
21   default:
22 
23 #service-mesh:
24 
25 #  default:
26 
27 #    bufferPath: ${SW_SERVICE_MESH_BUFFER_PATH:../mesh-buffer/}  # Path to trace buffer files, suggest to use absolute path
28 
29 #    bufferOffsetMaxFileSize: ${SW_SERVICE_MESH_OFFSET_MAX_FILE_SIZE:100} # Unit is MB
30 
31 #    bufferDataMaxFileSize: ${SW_SERVICE_MESH_BUFFER_DATA_MAX_FILE_SIZE:500} # Unit is MB
32 
33 #    bufferFileCleanWhenRestart: ${SW_SERVICE_MESH_BUFFER_FILE_CLEAN_WHEN_RESTART:false}
34 
35 #istio-telemetry:
36 
37 #  default:
38 
39 #receiver_zipkin:
40 
41 #  default:
42 
43 #    host: ${SW_RECEIVER_ZIPKIN_HOST:0.0.0.0}
44 
45 #    port: ${SW_RECEIVER_ZIPKIN_PORT:9411}
46 
47 #    contextPath: ${SW_RECEIVER_ZIPKIN_CONTEXT_PATH:/}