Open source Team

DC/OS: Install Marathon-LB with keepalived

After the minimal setup of the DC/OS in my further articles, I wanted to extend my DC/OS and add a loadbalancer. There are two options for loadbalancing in DC/OS 1. Marathon-LB (a layer 7 load balancer, used for external requests,(…)

How uid mapping works in Docker containers?

It can be interesting to see how uids between the docker host and docker containers are mapped. For example, for security concerns. As a reminder, docker containers are based on two linux kernel features:(…)

How to reduce the size of an LVM partition formatted with xfs filesystem on CentOS7?

DISCLAIMER: I know it exists other solutions to do it Pre-requisites: – a virtual machine (or not) with CentOS7 installed – a free disk or partition I use a VBox machine and I added a 5GiB hard disk(…)

Install Apache Kafka on Linux

What is Apache Kafka ? No, Kafka is not only the famous author (en.wikipedia.org/wiki/Franz_Kafka), it’s an open-source distributed pub-sub messaging system with powerful skills like scalability and fault tolerance. It’s also a stream processing platform (near real-time) for(…)

Welcome to M|17, part 2

Welcome to the second day of the MariaDB’s first user conference On the 12th, at 09:00, started the first-ever experimental MariaDB Associate certification exam and I was glad to be among the first and participate(…)

Welcome to M|17

Welcome to the MariaDB’s first user conference On the 11th, started at 09:00 this big event at the Conrad Hotel in New York, closed to the One World Trade Center After the short registration process where we(…)

From MySQL (Oracle) to Postgres using the EDB Migration Toolkit

Why should you migrate? If your current MySQL database does not offer some needed functionnalities according to your business as: – more security – more high availibilty options (hot standby) – Strong Data Warehouse capabilities(…)

MariaDB: audit plugin

Why should you Audit your MySQL Instances? First to provide you a way to track user accessing sensible data Secondly to investigate on suspicious queries in all your critical databases Thirdly to comply with law and industry standards(…)

How to install Mirantis OpenStack 9.0 using VirtualBox – part 3

In the two first blogs, I installed the Fuel environment and deployed OpenStack in the Fuel slave nodes and all of that from the Fuel Master node. In this blog, I will show you  all the steps to follow in(…)

How to install Mirantis OpenStack 9.0 using VirtualBox – part 2

The  last blog ended up with a successful installation of the Fuel Master. In this blog, I will deploy Openstack on the three Fuel slave nodes. The first node will be the controller node and all(…)