Posts for technology


Deploy a secure instance of Elasticsearch on Kubernetes

It's easy to deploy Elasticsearch on Kubernetes. You get yourself a copy of the Elastic Helm Charts…


Automate your home with a Shelly 1 Wi-Fi module

I'm a bit conservative about automating my home because of the vendor lock-in or the requirement to…


Install Keycloak on CentOS 7 with MySQL backend

Keycloak is an open source Identity and Access Management solution aimed at modern applications and…


Use Kubernetes Certificate Manager to automatically add SSL/TLS certificates to ingresses

Kubernetes Certificate Manager (cert-manager) is a native Kubernetes controller helping you to issu…


Docker on CentOS 7 machine with XFS filesystem can cause trouble when d_type is not supported

At my work, we try to automate almost everything. We're using Docker to containerize our in-house d…


Backup Percona XtraDB Cluster or Galera Cluster with TwinDB

Database servers and clusters should be backed up regularly to prevent data loss when an error or d…