The RTFM migration from DigitalOcean to AWS went smoothly, and I’m gradually settling in. New infrastructure, everything new – so for the first while I want to keep a close eye on the server and blog state, which means setting up basic monitoring for WordPress: NGINX, PHP-FPM, the database, and the infrastructure running it all.… Read More »
It’s time for a major server upgrade for RTFM, which I usually do by migrating to a new server – because I also do various other upgrades along the way, like upgrading the PHP version or even migrating to a different cloud. This time I’m planning to move from DigitalOcean, where RTFM has been hosted… Read More »
This is essentially the last major task – setting up automated backup creation. In the post FreeBSD: Home NAS, Part 13: Planning Data Storage and Backups I described the general idea in more detail – what gets backed up, where, what gets stored and how – and today is the purely technical part about the actual… Read More »
There’s this cool thing called self-hosted home pages. I saw them somewhere on Reddit a while back, saved them to bookmarks, and now that I have all this self-hosted stuff with NAS (see FreeBSD: Home NAS, part 1), Grafana, and other useful things for work and daily life – I thought it would be nice… Read More »
In the previous post FreeBSD: Home NAS, part 10 – monitoring with VictoriaMetrics and Grafana, we configured VictoriaMetrics, node_exporter, Grafana and created a basic dashboard and basic alerts. Now, I want to add a bit more monitoring – to see process CPU/RAM data, SMART information, and ZFS details. Everything written here has been added to… Read More »
The next task I want to do with Golang is building a custom log collector that retrieves AWS Application Load Balancer logs from S3 and sends them to VictoriaLogs. Sure, we could simply use Vector.dev, like what I did for AWS VPC Flow Logs (see: Vector.dev introduction, logs from AWS S3, and VictoriaLogs integration). But… Read More »
Interfaces in Go allow you to describe access to data or behavior without providing concrete implementations inside the interface itself. In this way, we create a “common bus” that we can then use to “connect” external “systems.” In other words, an interface is an abstraction that defines a contract. The contract describes what can be… Read More »
Got a new task to monitor costs on OpenAI – to see how much each project spends per day, and send alerts to Slack if costs exceed a set threshold. I tried several existing exporters for the OpenAI API, but none provided cost metrics per project – so we’ll build one ourselves. To create the… Read More »
Perhaps everyone has used operators in Kubernetes, for example, PostgreSQL operator, VictoriaMetrics Operator. But what’s going on under the hood? How and to what are CustomResourceDefinition (CRD) applied, and what is an “operator”? And finally, what is the difference between a Kubernetes Operator and a Kubernetes Controller? In the previous part – Kubernetes: Kubernetes APIs,… Read More »
It’s difficult to describe in one post what thousands of books have been written about in a thousand pages, but today we’ll try to quickly review the basics of how hosts communicate on a network. First, let’s talk about the OSI and TCP/IP models, then about packet structure and connection establishment, and finally, we’ll look… Read More »