Healthchecks.io pinging API has always been based on UUIDs. Each Check in the system has its own unique and immutable UUID. To signal a start, a failure, or a particular exit status, clients can add more bits after the UUID: This is conceptually simple and has worked quite well. It requires no additional authentication. The UUID value is the authentication, and the UUID “address space” is so vast nobody is going to find valid ping URLs by random guessing any time soon.

If you've been using Let's Encrypt for a while, you may have noticed that their certificates are signed by a root certificate titled DST Root CA X3. That root certificate is set to expire in a few hours. Any certificates still signed by that root will no longer be valid. But luckily, that shouldn't form a problem for most Let's Encrypt users. For a while now, new SSL issuances by Let's Encrypt have issued certificates against DST Root CA X3 (the one that is about to expire) and ISRG Root X1.

Not so long ago, development teams working for the U.S. Department of Defense could take anywhere from three to ten years to deliver software. “It was mostly teams using waterfall, no minimum viable product, no incremental delivery, and no feedback loop from end users,” Nicolas M. Chaillan, Chief Software Officer of the U.S. Air Force, said in a CNCF case study. “Particularly when it comes to AI, machine learning, and cybersecurity, everyone realized we have to move faster.”

Modern software development is evolving rapidly, and while the latest innovations allow companies to grow through greater efficiency, there is a cost. Modern architectures are incredibly complex, which can make it challenging to diagnose and rectify performance issues. Once these issues affect customer experience, the consequences can be costly. So, what is the solution? Observability — which provides a visible overview of the big picture.

Modern computing has come a long way in the last couple of years and the introduction of new technologies is only accelerating the rate of advancements. From the immense compute power at our disposal to lightning-fast networks and ready-made services, the opportunities are limitless. In such a fast-paced world, we can’t ignore economics.