Infrastructure

Going open-source in monitoring, part 0: Intro

Series of posts about migration from commercial monitoring systems to opensource.

Sergey Nuzhdin

3 minute read

https://www.flickr.com/photos/xmodulo/24311604930

Intro (this article) Deploy and basic configuration of Prometheus Create first dashboard in Grafana Configuring alerts in Prometheus and Grafana Making sense of logs with ELK stack and Sentry Replacing commercial APM monitoring Monitoring of the infrastructure is an essential part of any product. But it’s not uncommon for companies to postpone monitoring for the later period. Having it in “nice-to-have” bucket. That’s one of the reasons why they spend a lot of time reacting to the problems after service disruption.

Sergey Nuzhdin

7 minute read

A few days ago when I tried to install helm chart in my Kubernetes cluster I noticed that all new pods that required storage were in pending state. After a quick check of the logs, I found out that pods were unable to get PVC from GlusterFS. I recently wrote about my experience deploying GlusterFS cluster. This time I will go through recovering data from the broken GlusterFS cluster, and some problems I faced deploying new cluster.

Sergey Nuzhdin

5 minute read

Since my previous posts[1][2] about CI/CD, a lot have changed. I started using Helm for packaging applications, stopped using docker-in-docker in gitlab-runner. Recently, I started working on a few Golang microservices. I decided to try gitlab’s caching and split the job into multiple steps for better feedback in UI. Few of the main changes to my .gitlab-ci.yaml file since my previous post: no docker-in-docker using cache for packages instead of a prebuilt image with dependencies splitting everything into multiple steps.

Sergey Nuzhdin

5 minute read

Creating a high available PostgreSQL cluster always was a tricky task. Doing it in the cloud environment is especially difficult. I found at least 3 projects trying to provide HA PostgreSQL solutions for Kubernetes. Patroni Patroni is a template for you to create your own customized, high-availability solution using Python and - for maximum accessibility - a distributed configuration store like ZooKeeper, etcd or Consul. Database engineers, DBAs, DevOps engineers, and SREs who are looking to quickly deploy HA PostgreSQL in the datacenter - or anywhere else - will hopefully find it useful.

Sergey Nuzhdin

8 minute read

After my previous post - How to easily deploy GitLab to Kubernetes - I’ve got a lot of responses. I helped several people to get GitLab up and running on their clusters. With that manifests it became much easier to deploy GitLab to Kubernetes. It was still few things that were usually misunderstood and misconfigured. You can find out these things only by talking with people who are actually trying to use your work.