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springboot-cloud-loadbalancer-demo

README.md

Client loadbalancer with spring cloud

; this is a demo project for client side loadbalancer with spring cloud
from Spring getting started

Getting started

Start server1,2,3

// start server1
$ ./gradlew bootRun -PjvmArgs="-Dserver.port=3000 -Dspring.profiles.active=server"

// start server2
$ ./gradlew bootRun -PjvmArgs="-Dserver.port=3001 -Dspring.profiles.active=server"

// start server3
$ ./gradlew bootRun -PjvmArgs="-Dserver.port=3002 -Dspring.profiles.active=server"

Check server1,2,3

$ curl -XGET http://localhost:3000/greeting

$ curl -XGET http://localhost:3001/greeting

$ curl -XGET http://localhost:3002/greeting

Start client

$ ./gradlew bootRun -PjvmArgs="-Dserver.port=8080 -Dspring.profiles.active=client"

Request to client repeatedly

$ curl -XGET http://127.0.0.1:8080/hello
$ curl -XGET http://127.0.0.1:8080/hello
$ curl -XGET http://127.0.0.1:8080/hello
$ curl -XGET http://127.0.0.1:8080/hello

Then u can see server's log that received distributed requests.

Request with 6 times

server1 -> server2 -> server3 -> server1 -> server2 -> server3

// server1's log
2020-01-03 00:12:56.837  INFO 12900 --- [nio-3000-exec-1] demo.server.ServerController             : Access /greeting
2020-01-03 00:13:00.876  INFO 12900 --- [nio-3000-exec-2] demo.server.ServerController             : Access /greeting

// server2's log
2020-01-03 00:12:58.852  INFO 10304 --- [nio-3001-exec-1] demo.server.ServerController             : Access /greeting
2020-01-03 00:13:01.420  INFO 10304 --- [nio-3001-exec-3] demo.server.ServerController             : Access /greeting

// server3's log
2020-01-03 00:12:59.640  INFO 16432 --- [nio-3002-exec-1] demo.server.ServerController             : Access /greeting
2020-01-03 00:13:01.957  INFO 16432 --- [nio-3002-exec-2] demo.server.ServerController             : Access /greeting