Matt Gerega

Tag: Kubernetes

  • A Lesson in Occam’s Razor: Configuring Mimir Ruler with Grafana

    Occam’s Razor posits “Of two competing theories, the simpler explanation is to be preferred.” I believe my high school biology teacher taught the “KISS” method (Keep It Simple, Stupid) to convey a similar principle. As I was trying to get alerts set up in Mimir using the Grafana UI, I came across an issue that…

  • Walking away from Rancher

    I like to keep my home lab running for both hosting sites (like this one) and experimenting on different tools and techniques. It is pretty nice to be able to spin up some containers in a cluster without fear of disturbing other’s work. And, since I do not hold myself to any SLA commitments, it…

  • Kubernetes Observability, Part 5 – Using Mimir for long-term metric storage

    This post is part of a series on observability in Kubernetes clusters: Part 1 – Collecting Logs with Loki Part 2 – Collecting Metrics with Prometheus Part 3 – Dashboards with Grafana Part 4 – Using Linkerd for Service Observability Part 5 – Using Mimir for long-term metric storage (this post) For anyone who actually…

  • I’ll take ‘Compatibility Matrices’ for $1000, Alex…

    I have posted a lot on Kubernetes over the past weeks. I have covered a lot around tools for observability, monitoring, networking, and general usefulness. But what I ran into over the past few weeks is both infuriating and completely avoidable, with the right knowledge and time to keep up to speed. The problem I…

  • Kubernetes Observability, Part 4 – Using Linkerd for Service Observability

    This post is part of a series on observability in Kubernetes clusters: Part 1 – Collecting Logs with Loki Part 2 – Collecting Metrics with Prometheus Part 3 – Dashboards with Grafana Part 4 – Using Linkerd for Service Observability (this post) Part 5 – Using Mimir for long-term metric storage As we start to…

  • Kubernetes Observability, Part 3 – Dashboards with Grafana

    This post is part of a series on observability in Kubernetes clusters: Part 1 – Collecting Logs with Loki Part 2 – Collecting Metrics with Prometheus Part 3 – Dashboards with Grafana (this post) Part 4 – Using Linkerd for Service Observability Part 5 – Using Mimir for long-term metric storage What good is Loki’s…

  • Kubernetes Observability, Part 2 – Collecting Metrics with Prometheus

    This post is part of a series on observability in Kubernetes clusters: Part 1 – Collecting Logs with Loki Part 2 – Collecting Metrics with Prometheus (this post)Part 3 – Building Grafana DashboardsPart 4 – Using Linkerd for Service ObservabilityPart 5 – Using Mimir for long-term metric storage “Prometheus” appears in many Kubernetes blogs the…

  • Kubernetes Observability, Part 1 – Collecting Logs with Loki

    This post is part of a series on observability in Kubernetes clusters: Part 1 – Collecting Logs with Loki (this post) Part 2 – Collecting Metrics with Prometheus Part 3 – Dashboards with Grafana Part 4 – Using Linkerd for Service Observability Part 5 – Using Mimir for long-term metric storage I have been spending…

  • Creating a simple Nginx-based web server image

    One of the hardest parts of blogging is identifying topics. I sometimes struggle with identifying things that I have done that would be interesting or helpful to others. In trying to establish a “rule of thumb” for such decisions, I think things that I have done at least twice qualify as potential topics. As it…

  • Breaking an RKE cluster in one easy step

    With the release of Ubuntu’s latest LTS release (22.04, or “Jammy Jellyfish), I wanted to upgrade my Kubernetes nodes from 20.04 to 22.04. What I had hoped would be an easy endeavor turned out to be a weeks-long process with destroyed clusters and, ultimately, an ETCD issue. The Hypothesis As I viewed it, I had…