Kubernetes troubleshooting series — Problem In Kubernetes, the size of a Persistent Volume Claim (PVC) cannot be directly updated for a StatefulSet object. This limitation exists because the PVC is bound to a Persistent Volume (PV) that has a fixed capacity. When you create a PVC for a StatefulSet, it requests a specific amount of…

We are stubborn on vision. We are flexible on details — Jeff Bezos — What is Blackbox exporter? The Prometheus Blackbox exporter allows blackbox probing of endpoints over HTTP, HTTPS, DNS, TCP, ICMP and gRPC. This exporter provides metrics about endpoint status, HTTP latencies, redirect information, DNS lookups latencies as well as statistics about SSL certificates expiration. It works out-of-the-box, as it just focuses on external visibility details.

Code, build, and deploy! — Since GitLab 14.1 the Package Registry allows users to build, publish, install, and share Helm charts. What Is Helm Chart? Helm uses a packaging format called charts. A chart is a collection of files that describe a related set of Kubernetes resources. …

Content In this story, I’ll short talk about Docker and will share resources for beginners who want to learn Docker. I’ve prepared the practicing part as well which is described in the last part of this story. Happy reading! What is Docker? Docker is a set of platform as a service (PaaS) products that…

Introduction. Have you ever thought to turn JSON objects into Prometheus format metrics? This point can be implemented via prometheus-json-exporter. that scrapes remote JSON by JSONPath. About this tutorial. In this tutorial, we’ll learn how to deploy and configure json_exporter for a public JSON endpoint and use it with Prometheus. …

You are the captain of your own ship; don’t let anyone else take the wheel. — Michael Josephson — Minikube is a lightweight Kubernetes implementation that creates a VM on your local machine and deploys a simple cluster containing only one node. Minikube is available for Linux, macOS, and Windows systems. What about if you want to run a minikube on your remote single-node and manage it from the…

Efficiency and focus are the keys to success — Federation allows a Prometheus server to scrape selected time series from another Prometheus server. Prometheus federation can be used to scale to hundreds of clusters or to pull related metrics from one service’s Prometheus into another. …

Short about Redis. Redis is an open-source, in-memory data structure store, used as a database, cache, and message broker. The supported data types are: Strings Lists Hashes Sets Sorted sets Bitmaps and HyperLogLogs

One of the main features of Prometheus is alerting. It’s possible to create advanced and universal alerting rules with Prometheus. In this context, universal means to have one alerting rule instead of many. Having many alerting rules is inconvenient and we need to spend a lot of time creating said…