In addition to the article about the PeerVPN installation and configuration, I will now show you a more advanced and quite ‘modern’ way to provision several servers and get your VPN client up really fast. You’ve probably heard of Ansible already. Well, one of its use cases is exactly what we need here: Configuration Manager. Many […]
The rule of the “cloud” has already been established and now we have multiple vendors fighting for market share. Many companies started relying on the cloud and seeking more and more automation and could services. It looks easy, you just select a cloud provider, use its services and you have several virtual machines or containers […]
I’m not a big NFS fan ever since I worked as a Linux/Unix administrator way back in the good old days. Sometimes when the NFS server hung, lost network connectivity, or something else happened all clients that had mounts from the NFS completely blocked waiting for it to come back up, because it is so […]
Backup is an essential part of IT infrastructure management. Having HA solutions, RAIDs etc. doesn’t free you from the need for backup. In case of a human error all those techniques will not save you, only the backup will.
In my previous blog post, I was discussing how to monitor RabbitMQ as a centralized message Q of Openstack. Well, that’s quite important but the end goal of having a cloud is the instance on top of the machine. Most of you and especially the infrastructure guys who dig into monitoring will know what are the most […]
Last year we focused on Openstack technology and the projects behind it. We decided to stress on it and move our scope in that direction because of the rich features and flexibility that it provides. But as we know great power comes with great responsibility.
If you’re an administrator of virtualized environments you have definetly ran into IO performance issues. IO is the first bottleneck that one hits. Luckily persistant storage has evolved troughout the years and lately we see the high performant SSDs at a reasonable price, still far higher to allow organizations to fully migrate to SSD.
Introduction to Docker If you have been following the “cloud” trends you probably have heard of Docker. It is an open-source implementation of the LXC (Linux Containers) used for packaging an application and its needed dependencies into a container that can be deployed and replaced easily. The containerization in Docker is achieved via resource isolation […]
Java Virtual Machine (JVM) Heap Space Possible failures of java code core dump JVM Tuning the application server is recommended as opposed to just sticking with the default values assigned during an application server install. If the heap size is not managed or tuned, you may see the symptoms of poor memory management which can […]