Skywalking poc

Requirement

• JDK 11 (As of now this application works on Java 11.)
• Gradle 7+(Tested in 7.4.1)
• Docker(with docker-compose)

Run oap server, elastic-search, skywalking-ui modules in docker

./docker-compose docker-compose -f skywalking.yml up

Run services

gradle :zull-gateway:bootRun
gradle :user-service:bootRun

Test with postman

import skywalking-poc.postman_collection.json into postman Hit these curl calls multiple times:

curl --location 'http://localhost:9080/demo/api/user'
--header 'token: test'
--header 'Content-Type: application/json'
--data '{ "name": "test320" }'

curl --location 'http://localhost:9080/demo/api/user'
--header 'token: test'

Visualize data Skywalking UI : localhost:8080

Additional info about project :

Download java agent

• http://skywalking.apache.org/downloads/

  tar xzf apache-skywalking-apm-6.2.0.tar.gz 
  mv -f apache-skywalking-apm-bin/agent ./agent
  rm -rf apache-skywalking-apm-bin

• Add manually trace in code
  • gradle

   implementation 'org.apache.skywalking:apm-toolkit-trace:9.1.0'	```
   * Code: `@Trace`, `@TraceCrossThread`, `ActiveSpan`, `TraceContext`

• Add logback trace id
  • gradle

   implementation 'org.apache.skywalking:apm-toolkit-logback-1.x:9.1.0'

  • logback.xml

   <conversionRule conversionWord="tid" converterClass="org.apache.skywalking.apm.toolkit.log.logback.v1.x.LogbackPatternConverter"/>
   <property name="CONSOLE_LOG_PATTERN"
             value="%clr([%tid]%d{yyyy-MM-dd HH:mm:ss.SSS}){faint} %clr(${LOG_LEVEL_PATTERN:-%5p}) %clr(${PID:- }){magenta} %clr(---){faint} %clr([%15.15t]){faint} %clr(%-40.40logger{39}){cyan} %clr(:){faint} %m%n${LOG_EXCEPTION_CONVERSION_WORD:-%wEx}"/>
  
  

Enable agent

For gradle as an example

bootRun {
	jvmArgs = ["-Dskywalking.agent.service_name=zull-gateway", "-javaagent:$projectDir/skywalking-agent/skywalking-agent.jar"]
}

• skywalking.agent.service_name should be same as service name in application.yml to avoid some issues.