Operations | Monitoring | ITSM | DevOps | Cloud

The other day whilst using a very popular website I came across a series of 404 unavailable page messages. I didn’t think much about it at the time but on reflection it made me wonder how many people actually understand what different error codes mean? Hands up, I only know a few and I work in the website monitoring sector. To most, it just means a weird IT message when things go wrong.

Since graduating within CNCF last August, Prometheus has adopted a new schedule for releases every six weeks. The latest release, v2.11, arrived on July 9. Prometheus 2.11 includes a new option to compress WAL records using Snappy, query performance improvements, the option to use Alertmanager API v2, and more. You can download the latest version here. prometheus_tsdb_wal_reader_corruption_errors is now renamed to prometheus_tsdb_wal_reader_corruption_errors_total.

Python list comprehensions offer a concise method of interacting with each element of a list. Even though they’ve been available since Python 2.0, their syntax often demotivates people from using them. This article aims to introduce List Comprehensions in a friendly way and offer you one more Python feature to add to your scripting toolbox.

Mark Henderson has been a Site Reliability Engineer at Stack Overflow since 2015. Before this he worked as the sole systems administrator at a small software company in Sydney, Australia. These days, he lives in South Australia and works from home with his wife and two children.