Abstract: Make a database which can be store historic modification is often considered a “secondary” activity, but bad design leads to databases that are difficult to optimize and often not very understandable. In this article we illustrate a simple method that respects the dictates of relational theory & is easy to understand. As a plus we will show it on SQLite, a small but powerful database system.

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When you run pihole in a docker container, it could be difficult to build images on the same docker daemon, because docker-compose cannot pass DNS request to another container during build, and normal dns resolution fixes won’t work.

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Random list of very interesting projects (will be updated, guys).

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I was trying to explore a way to build a client/server application in Typescript; after some failed experiments, I found something better: Next.js offer the ability to build a React application and to render server-side its dynamic components.

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Bullet points:

1. 1979: Unix V7 Introduced the chroot command to isolate the filesystem a process "access" to.
2. Various technology was introduced up to 2006, like Virtuozzo (which patched Linux in a proprietary ways)
3. 2006: Process Containers Launched by Google in 2006 was designed for limiting, accounting and isolating resource usage (CPU, memory, disk I/O, network) of a collection of processes. It was renamed “Control Groups (cgroups)” a year later and eventually merged to Linux kernel 2.6.24.
4. 2008: LXC LXC (LinuX Containers) was the first, most complete implementation of Linux container manager. It was implemented in 2008 using cgroups and Linux namespaces, and it works on a single Linux kernel without requiring any patches.
5. 2013: Docker Docker used LXC in its initial stages and later replaced that container manager with its own library, libcontainer. Docker offered a way to configure and manage containers, i.e a standard de-facto for this technology. As you see Docker was based on cgroups and LXC, seven-years old technologies
6. On September 2014 Google published the first release of Kubernetes
7. In 2015 Docker, CoreOS and others founded the Open Container Initiative's (OCI). K8s does not need docker anymore to work, but Docker traction is still strong.

 

References:

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A friend of mine asked some insight on how to harden a Gitea server on Internet. Gitea is a web application for manging git repositories.

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Modern computer are very very very fast. C/64 was about 1Mhz and you can hangs it just throwing a 10.000 cycle in interpreted BASIC v2 language.

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I am always amused on how complex K8s/Docker Swarm are, and how easy “plain” docker is.

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