#dns #http #ping #health #tcp

app reachr

A simple tool to check service health across various protocols

4 stable releases

1.1.0 Dec 13, 2023
1.0.2 Aug 6, 2023
1.0.1 Aug 3, 2023
1.0.0 Jul 16, 2023

#1712 in Network programming

26 downloads per month

Apache-2.0 OR MIT

344 lines


This is a simple health/reachability tester for HTTP(S), TCP, ICMP pings, and DNS queries.

See examples dir for K8S deployment & configuration examples


I wanted a super simple way to check if a lot of things are online in various senses of the word "online". Is my homebuilt DNS server down? Is my homelab K8S cluster down? Etc.


~506K SLoC