Round Robin DNS

In a previous post, I’ve covered how I used Digital Ocean’s load balancer to handle the increasing number of request my Weather Extension receives. For weeks everything was going great but about a month ago I started having issues with DO load balancer. Users were receiving 522 (timeouts) errors. DO claimed my servers were the issue. After some testing, I realized that around 1,000 requests a minute, Digital Ocean’s load balancer started failing even though they claim to not limit the number of requests.

In a panic, I had to make a quick decision. I decided to double the ram/cpu on my web server and point all traffic to it to see if it could handle the request. This helped but some users were still having issues. Then I tried CloudFlare’s load balancer. It was easy to setup and worked well. Pricing is per request and I estimated it would cost around $20 a month, which matched DO.

My first bill for CloudFlare’s load balancer for 63 million requests was over $70, which was more than the servers hosting Weather Extension. I reached out to Taylor Otwell for advice. He recommended a free option using CloudFlare’s rotating DNS (Guide). I added the additional A records to point to my 3 servers and everything worked great!

I would recommend using rotating DNS over a load balancer if you are not needing automatic failover. In my case, the cost savings are worth the possible downtime.

If you have any questions, please leave a comment below.

Thanks for reading. Make sure you follow me on Twitter to stay up to date on the progress of my side projects T.LYWeather Extension, and Link Shortener Extension. If you are interested in the tech I use daily, check out my uses page.  

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