December | 2018 | RedHatBible

Apache Cloudstack

Posted on December 12, 2018December 21, 2018 by Ron Jagannathan

CloudStack is apache foundation managed open-source cloud computing software for creating, managing, and deploying infrastructure cloud services. It uses existing hypervisors such as KVM, VMware vSphere, VMware ESXi, VMware vCenter, and XenServer/XCP for virtualization. In addition to its own API, CloudStack also supports the Amazon Web Services (AWS) API[2] and the Open Cloud Computing Interface from the Open Grid Forum. Rather than explain CloudStack here. (I am still learning cloudstack). I think your…

ARM Processors land in a Supercomputer – First Petascale supercomputer built by Perspecta [HP] for Sandia Labs.

Posted on December 11, 2018December 15, 2018 by Ron Jagannathan

Sandia National Laboratories will soon be taking delivery of the world’s most powerful supercomputer using ARM processors. The system, known as Astra, is being built by Hewlett Packard Enterprise (HPE) and will deliver 2.3 petaflops of peak performance when it’s installed later this year. “Sandia National Laboratories has been an active partner in leveraging our…

HowTos – Linux Security – HowTo Block SSH Server Attacks Using “DenyHosts”.

Posted on December 11, 2018March 16, 2019 by Ron Jagannathan

DenyHosts is an open source log-based intrusion prevention security program for SSH servers developed in Python. It is intended to monitor and analyzes SSH server logs for invalid login attempts, dictionary based attacks and brute force attacks by blocking the originating IP addresses by adding an entry to /etc/hosts.deny file on the server and prevents the IP address from making any further such…

Why Is Microsoft Showing So Much Interest In Linux, Apache Mesos, DC/OS and other opensource software lately?

Posted on December 6, 2018January 14, 2019 by Ron Jagannathan

It appears that Microsoft has decided that the operating system is no longer an important battleground, and that it’s more important to gain market share in cloud (Azure and Office 365) than it is to put energy into battling Linux for application market share. Microsoft’s cloud strategy has shifted to customer choice, including support for…