System-Engineering on Janik von Rotz

Nginx, Loki, Promtail and Grafana

Tue, 09 Nov 2021 09:13:06 +0100

Hey devops engineer, you don’t need Logtail, Sentry, Datadog or any other SaaS/PaaS service to manage your logs. Collecting and analyzing log files is super easy with the LPG-stack. Another acronym that stands for Loki, Promtail and Grafana.

Add Prometheus instance variable to Grafana query

Mon, 19 Apr 2021 18:05:23 +0200

Prometheus stores the instance or host name for every metric. If you want to filter your dashboard data based on the instance name you need a Grafana variable.

Monitor cron jobs with Prometheus, Grafana and Node exporter

Mon, 07 Sep 2020 11:26:05 +0200

Nobody wants to be notified by email anymore, especially if its a failed cron job. We have advanced monitoring systems that tell if somethings wrong. In my case I use Grafana and Prometheus and Node exporter to collect host metric, visualize them and send out alerts. Usually, one would set up an exporter to monitor an new piece of software, but for cron there isn’t any exporter available. In contraire there are a lot of online service to monitor your cron jobs, such as Cronitor.io. But we do not want to add another dependency for simply monitoring cron jobs.

System Observability and Chaos Engineering

Sun, 16 Sep 2018 14:58:02 +0200

At the last Jazoon tech days I learned about the current state of DevOps and other related topics. During the talks “chaos engineering” and “observability” were mentioned many times. I didn’t know either and became curious what it was about.

SOA and microservices explained well

Wed, 09 May 2018 16:11:00 +0000

As mentioned to my friends many times I’m a huge fan of Hacker News and read it every day (make sure to not get fooled by the misleading name, it has nothing to do with hacking at all). It’s about IT news from various domains and sometimes from other domains of science. Today I stumbled upon an article about SOA and microservice while browsing HN. I personally struggled understanding the concept of microservices and its relations to SOA. On one side you’ll find very abstract definitions and on the other side there a very specific technical appliances. Anyway, the article blow condensed the whole topic quite nice.

Zabbix stack with Vagrant, CoreOS and Docker

Thu, 08 Oct 2015 16:03:44 +0000

This short guide shows you how to set up a virtual Zabbix Network Monitoring Stack with MySQL and CoreOS deployed by Docker.

On your host machine make sure that these tools are available.