Load Testing with Locust

You might be familiar with load testing tools such as Apache Benchmark (ab), siege, Apache JMeter and cloud services such as BlazeMeter, LoadImpact,, etc. I tried many other tools, and found that there is no tool that completely satisfies me: ab and siege are too plain and simple without scenario, JMeter needs time […]

GitLab docker on Ubuntu

Today I decided to move my self-hosted gitlab instance to Docker so that I will not need to reinstall and configure lots of things when migrating from one host to another host. So I blog this entry to note steps to install gitlab docker on Ubuntu. Install Docker CE (or […]

Validate a Let’s encrypt certificates on CloudFlare-enabled websites

In this quick tutorials, I will mention a method to Auto-Renew / Validate a Let’s encrypt certificates on CloudFlare-enabled websites. As you may know, if you use CloudFlare for DNS/CDN purposes, then you cannot access to several server ports for Let’s Encrypt to validate the certification request. So in this […]