Category Archives: DataCenter

Backup: Daily back-up on external encrypted disk with rsync and cron

By | February 8, 2017

Everybody knows the importance of a daily back-up. There are a lot of tools with fancy GUIs and useless information but sometimes the best is to keep it simple. Linux offers some very powerful build-in ways of creating a perfect backup. The scope is to create a secure incremental automatic daily backup without using fancy… Read More: Backup: Daily back-up on external encrypted disk with rsync and… »

#DRBD: Synchronization of sites after the failed DR (disaster recovery) site is recovered

By | April 24, 2017

This is a follow-up tutorial on the DRBD replication posts about resynchronization of sites after the failed DR site is recovered. More than a year ago I described in a long tutorial how to use DRBD in a real production environment and the challenges associated to it. See: DRBD based disk replication of a production… Read More: #DRBD: Synchronization of sites after the failed DR (disaster recovery)… »

#DRBD: Resynchronization of sites after the failed PR site is recovered (DRBD split brain recovery)

By | March 6, 2017

This is a follow-up tutorial on the DRBD replication posts about resynchronization of sites after the failed PR site is recovered (DRBD split brain recovery). More than a year ago I described in a long tutorial how to use DRBD in a real production environment and the challenges associated to it. See: DRBD based disk… Read More: #DRBD: Resynchronization of sites after the failed PR site is… »

#DRBD: Promoting the DR site as the main site when PR is failed

By | March 6, 2017

This is a follow up tutorial on the DRBD replication posts about promoting the DR site as the main site when PR is failed. More than a year ago I described in a long tutorial how to use DRBD in a real production environment and the challenges associated to it. See: DRBD based disk replication… Read More: #DRBD: Promoting the DR site as the main site when… »

#DRBD: Gracious role switching of live sites configured with DRBD replication

By | March 6, 2017

This is a follow up tutorial on the DRBD replication posts about gracious role switching of live sites configured with DRBD replication. More than a year ago I described in a long tutorial how to use DRBD in a real production environment and the challenges associated to it. See: DRBD based disk replication of a… Read More: #DRBD: Gracious role switching of live sites configured with DRBD… »

Docker: Install a Nexus Raw Repository for Docker-compose files

By | December 14, 2016

This is a continuation of the post Install a Nexus Repository. In the following I will describe how to deploy a raw maven repository for the docker-compose files, docker make files and other text files. This repository will be used as the main entry point to the docker repository. STEP 1: Create a raw repository… Read More: Docker: Install a Nexus Raw Repository for Docker-compose files »

#Docker: Install a #Nexus Repository

By | May 26, 2017

I had the task to find a way to store centrally docker containers of enterprise applications. The following constraints had to be met: – the containers should be used for QA and training by people who do not need to know the details of deploying complicated enterprise application environments. Docker-compose files will be used to… Read More: #Docker: Install a #Nexus Repository »