在 .NetCore 專案中使用 SkyWalkingAPM 踩坑排坑日記
SkyWalking 概述
SkyWalking 是觀察性分析平臺和應用效能管理系統。提供分散式追蹤、服務網格遙測分析、度量聚合和視覺化一體化解決方案。支援Java, .Net Core, PHP, NodeJS, Golang, LUA語言探針,支援Envoy + Istio構建的Service Mesh。
這裡丟擲兩個概念,SkyWalking 服務和語言探針。SkyWalking 本身是用 Java 寫的,作為應用效能管理系統,探針是收集應用效能指標資料的,比如在 .net core 專案中引入 SkyAPM.Agent.AspNetCore,做一些配置,就可以將該專案的資料報告給 SkyWalking 服務,在 SkyWalking UI 介面看到視覺化的資料。
SkyWalking 展示的資料是需要儲存的,預設是 H2,同時也支援使用ElasticSearch、MySQL、TiDB、InfluxDB,這裡使用 elasticsearch。
環境說明
本機開發環境:Win10 + VS2019,伺服器是 CentOS,ip:172.17.81.23
Docker 方式(踩坑)
安裝 Elasticsearch
docker run --name elasticsearch --restart always -d -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" elasticsearch:7.8.1
安裝 Skywalking
docker run --name skywalking --restart always -d -p 11800:11800 -p 12800:12800 --link elasticsearch:elasticsearch -e SW_STORAGE=elasticsearch -e SW_STORAGE_ES_CLUSTER_NODES=elasticsearch:9200 apache/skywalking-oap-server:8.1.0-es7
安裝 SkyWalking-UI
docker run --name skywalking-ui --restart always -d -p 8080:8080 --link skywalking:skywalking -e SW_OAP_ADDRESS=skywalking:12800 apache/skywalking-ui:8.1.0
本機訪問 skywalking 服務,然而頁面一片空白,審查元素髮現這麼一句話:We're sorry but SkyWalking doesn't work properly without JavaScript enabled.Please enable it to continue.
檢視 Docker 服務,發現 SkyWalking 一直在 restart 狀態。檢視 dockerr 日誌,skywalking 連線到 elasticsearch 超時。
Docker Compose 方式(踩坑)
說明:用到的 compose 檔案版本是 3.8,需要 Docker 版本在 19.03.0 或更新的版本。
mkdir skywalking cd skywalking
vi docker-compose.yml
# 內容見 https://github.com/apache/skywalking-docker/blob/master/8/8.1.0/compose-es7/docker-compose.yml docker-compose up -d
# Licensed to the Apache Software Foundation (ASF) under one # or more contributor license agreements. See the NOTICE file # distributed with this work for additional information # regarding copyright ownership. The ASF licenses this file # to you under the Apache License, Version 2.0 (the # "License"); you may not use this file except in compliance # with the License. You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. version: '3.8' services: elasticsearch: image: docker.elastic.co/elasticsearch/elasticsearch:7.5.0 container_name: elasticsearch restart: always ports: - 9200:9200 healthcheck: test: ["CMD-SHELL", "curl --silent --fail localhost:9200/_cluster/health || exit 1"] interval: 30s timeout: 10s retries: 3 start_period: 40s environment: - discovery.type=single-node - bootstrap.memory_lock=true - "ES_JAVA_OPTS=-Xms512m -Xmx512m" ulimits: memlock: soft: -1 hard: -1 oap: image: apache/skywalking-oap-server:8.1.0-es7 container_name: oap depends_on: - elasticsearch links: - elasticsearch restart: always ports: - 11800:11800 - 12800:12800 healthcheck: test: ["CMD-SHELL", "/skywalking/bin/swctl"] interval: 30s timeout: 10s retries: 3 start_period: 40s environment: SW_STORAGE: elasticsearch7 SW_STORAGE_ES_CLUSTER_NODES: elasticsearch:9200 ui: image: apache/skywalking-ui:8.1.0 container_name: ui depends_on: - oap links: - oap restart: always ports: - 8080:8080 environment: SW_OAP_ADDRESS: oap:12800sw8.1-es7.5/docker-compose.yml
啟動之後可以看到 docker 服務狀態正常。狀態也是 healthy,總算放心了。
本機訪問 SkyWalking 服務地址,UI 暴露埠是 8080. 審查網路,沒有錯誤。
Asp.Net Core 專案應用
建立一個 WebAPI 專案,在專案中引用 NuGet 包:SkyAPM.Agent.AspNetCore,當前版本是 0.9.0
在專案根目錄下新增 skyapm.json 配置檔案。gRPC 下 的 Servers 為 SkyWalking 服務地址,注意替換成自己的服務地址。
{ "SkyWalking": { "ServiceName": "skyapm", "Namespace": "", "HeaderVersions": [ "sw6" ], "Sampling": { "SamplePer3Secs": -1, "Percentage": -1.0 }, "Logging": { "Level": "Information", "FilePath": "logs\\skyapm-{Date}.log" }, "Transport": { "Interval": 3000, "ProtocolVersion": "v6", "QueueSize": 30000, "BatchSize": 3000, "gRPC": { "Servers": "172.17.81.23:11800", "Timeout": 10000, "ConnectTimeout": 10000, "ReportTimeout": 600000 } } } }skyapm.json
也可以通過命令列工具來生成配置檔案。安裝 SkyAPM.DotNet.CLI,在專案根目錄下使用 CLI 命令生成 SkyWalking 配置檔案。命令規則是:dotnet skyapm config [your_service_name] [your_servers]
dotnet tool install -g SkyAPM.DotNet.CLI dotnet skyapm config skyapm 172.17.81.23:11800
啟動專案,沒有異常,但是也沒有展示出資料。檢視日誌,發現服務註冊失敗。
[skyapm] [Error] SkyApm.Transport.Grpc.V6.ServiceRegister : Register service fail. Grpc.Core.RpcException: Status(StatusCode=Unimplemented, Detail="Method not found: Register/doServiceRegister") at SkyApm.Transport.Grpc.V6.ServiceRegister.
翻看原始碼,查詢GitHub issue,原來這個註冊方法是 SkyWalking v7.0 中的方法,新的版本中是沒有這個方法的。
破案了,SkyAPM.Agent.AspNetCore 這個 NuGet 包有一年未更新了,不支援 SkyWalking 8,在 .Net Core 專案中需要使用 SkyWalking v7 或更低的版本。
Docker 方式(√)
SW7.0 之後的版本是用不了了,所以目前只能用 7.0 版本。
docker run --name elasticsearch --restart always -d -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" elasticsearch:7.8.1 docker run --name skywalking --restart always -d -p 11800:11800 -p 12800:12800 --link elasticsearch:elasticsearch -e SW_STORAGE=elasticsearch7 -e SW_STORAGE_ES_CLUSTER_NODES=elasticsearch:9200 apache/skywalking-oap-server:7.0.0-es7 docker run --name skywalking-ui --restart always -d -p 8080:8080 --link skywalking:skywalking -e SW_OAP_ADDRESS=skywalking:12800 apache/skywalking-ui:7.0.0
Docker Compose 方式(√)
將 docker-compose.yml 的內容替換成這個版本:https://github.com/apache/skywalking-docker/blob/master/7/7.0/compose-es7/docker-compose.yml。6.6版本親測可行。
version: '3.3' services: elasticsearch: image: docker.elastic.co/elasticsearch/elasticsearch:7.5.0 container_name: elasticsearch restart: always ports: - 9200:9200 environment: - discovery.type=single-node - bootstrap.memory_lock=true - "ES_JAVA_OPTS=-Xms512m -Xmx512m" ulimits: memlock: soft: -1 hard: -1 oap: image: apache/skywalking-oap-server:7.0.0-es7 container_name: oap depends_on: - elasticsearch links: - elasticsearch restart: always ports: - 11800:11800 - 12800:12800 environment: SW_STORAGE: elasticsearch7 SW_STORAGE_ES_CLUSTER_NODES: elasticsearch:9200 ui: image: apache/skywalking-ui:7.0.0 container_name: ui depends_on: - oap links: - oap restart: always ports: - 8080:8080 environment: SW_OAP_ADDRESS: oap:12800sw7.0-es7.5/docker-compose.yml
docker-compose 啟動之後大概1分鐘,啟動 api 專案,檢視日誌,沒有異常。訪問 api 專案,檢視 SkyWalking UI,激動人心的時刻終於到來了。
總結
SkyWalking 不同語言探針不是同一個團隊開發的,SkyAPM-dotnet 也沒怎麼更新了,在 .NetCore 平臺使用 SkyWalking 作為 APM,一定要選對版本,不要盲目求新啊
&n