"When Linus Torvalds sent his first email on August 25, 1991 announcing a project to create a new operating system, who could have imagined the impact it would have on the technology industry and how it would propel the concept of open source software development. Today, open source and Linux are used across the globe in almost every data center, powering trading platforms, processing millions of transactions each day and embedded in devices, from cell phones to televisions to refrigerators.
Database engineering is not a common term you hear in the news when reading about the hottest startup in Silicon Valley or the latest app that Kim Kardashian is using. But behind every new technological innovation, big or small, is the infrastructure that makes it work. End-users rarely, if ever, get to see what goes on behind the scenes as DBAs and IT staff address scalability, attempt to reduce the latency of an OLTP database, try to make the data warehouse run faster, or bring the latest innovations in silicon technology to database systems.
ConfigServer (CSF) is advanced open-source firewall for Linux. If you are like me, I don't really care much for the native firewalld that's included with RHEL7 releases, and I've used APF for years which is basically just a frontend for iptables.
Early this afternoon, I had just had just recorded a wide-ranging episode of Arrested DevOps with the incomparable Bridget Kromhout and noticed that I had a flurry of Twitter mentions, all in reaction to this tweet of mine. There was just one problem: I didn’t tweet it.
Ansible can certainly be installed using prebuilt packages from the EPEL repository, but while convenient, their offering is limited to Ansible 1.9.x – that is to say only versions prior to the major 2.0 release that includes a number of significant improvements, that were seen further polished in 2.1.
You will, more than likely, want to run 2.1.2, the latest stable release, for any production use, or perhaps the penultimate 2.0.1 release, if you are of a slightly more conservative origin.
Let’s take a step back and look at the current state of virtualization in the software industry. X86 hypervisors were built to run a few different operating systems on the same machine. Nowadays they are mostly used to execute several instances of the same OS (Linux), each running a single server application in isolation. Containers are a better fit for this use case, but they expose a very large attack surface. It is possible to reduce the attack surface, however it is a very difficult task, one that requires minute knowledge of the app running inside.