dcheck

dCheck : distributed URL checker

This is a sample golang app to demonstrate the power of zookeeper and how it can be used to implement a service like, distributed URL health checker.

DISCLAIMER : This is a sample app. No code snippet to be used in production without reviewing

Running the app

Get the code

go get github.com/Abhishekvrshny/dcheck

Install the dependencies

go get github.com/samuel/go-zookeeper/zk

Install zookeeper

Install zookeeper and make sure it's listening on port 2181

On mac

brew install zookeeper

Run the code

worker with id = 1

go run cmd/main.go --id=1

worker with id = 2

go run cmd/main.go --id=2

to add a URL from zkcli

create /dcheck/urls/bing.com ""

to delete a URL from zkcli

delete /dcheck/urls/bing.com

sample output

➜  dCheck git:(master) go run cmd/main.go --id=1
2019/09/05 22:15:50 Connected to [::1]:2181
2019/09/05 22:15:51 authenticated: id=72085958353616964, timeout=5000
2019/09/05 22:15:51 re-submitting `0` credentials after reconnect
LEADER : I am the Leader
LEADER : list of urls : [razorpay.com bing.com]
LEADER : list of workers : [1]
LEADER : updating data for worker : 1 : [razorpay.com bing.com]
WORKER : got updated payload : [razorpay.com bing.com]
WORKER : ID 1 : GOROUTINE 2 : checking URL bing.com
WORKER : ID 1 : GOROUTINE 1 : checking URL razorpay.com
WORKER : ID 1 : GOROUTINE 2 : checking URL bing.com
WORKER : ID 1 : GOROUTINE 1 : checking URL razorpay.com