Secure Live KVM VM Migration with CloudStack 4.11.1

Introduction CloudStack 4.11.1 introduces a new security enhancement on top of the new CA framework to secure live KVM VM migrations. This feature allows live migration of guest VMs across KVM hosts using secured TLS enabled libvirtd process. Without this feature, the live migration of guest VMs across KVM hosts would use an unsecured TCP connection, which is prone […]

Software based agent LB for CloudStack

Introduction Last year we implemented a new CA Framework on CloudStack 4.11 to make communications between CloudStack management servers it’s hypervisor agents more secure. As part of that work, we introduced the ability for CloudStack agents to connect to multiple management servers, avoiding the usage of an external load balancer. We’ve now extended the CA Framework by […]

CloudStack & Ceph day, Thursday, April 19 – roundup

On Thursday, April 19 the CloudStack community joined up with the Ceph community for a combined event in London, and what an event it was! The meetup took place at the Early Excellence Centre at Canada Water, on a beautiful, sunny day (in fact the hottest day of the year so far), and registration started […]

CloudStack and the new XenServer licensing model

Citrix have announced that as of XenServer 7.3, the free version (including the ‘opensource’ version packaged by Citrix) will no longer have feature parity with the paid-for Standard version. Of the features which are restricted in the free version, a maximum pool size of 3 hosts and the removal of Xen Storage Motion are going to make the use of free XenServer to run production clouds pretty much untenable.

What’s new in CloudStack 4.11?

Version 4.11 of Apache CloudStack has been released with some exciting new features and a long list of improvements and fixes. It includes more than 400 commits, 220 pull requests, and fixes more than 250 issues.  This version has been worked on for 8 months and is the first release of the 4.11 LTS releases, […]

Layer 2 Networks in CloudStack

Layer 2 (also known as the Data Link Layer) is the second in the seven-layer OSI reference model for network protocol design, and is equivalent to the link layer (the lowest layer) in the TCP/IP network model. Layer 2 is the network layer used to transfer data between adjacent network nodes in a wide area […]

A Beginners Guide To CloudStack Networking

Many people find it challenging to get started with CloudStack’s networking. There are some basic concepts, which although not overly complicated, are not especially obvious either. This blog will try to explain these underlying concepts, in order to make getting started with CloudStack networking models much easier.

ShapeBlue Security Advisory – DNSMasq Vulnerabilities

A number of security flaws were recently found in the DNSMasq tool. This tool is used by many systems to provide DNS and DHCP services, including by the CloudStack System VMs.
This advisory explains their affect on CloudStack and how to patch CloudStack against these flaws.

CloudStack European User Group roundup

Last Thursday saw us back at BT, London, for the Summer meetup of the CloudStack European User Group (CSEUG). A full schedule meant a prompt start, and Giles Sirett (CSEUG chairman) brought the meeting to order and started with introductions and CloudStack news. Since the last meetup, CloudStack 4.9.2 has been released, with 4.9.3 due […]

Host-HA for KVM Hosts in CloudStack

Intro What is HA? “High availability is a characteristic of a system, which aims to ensure an agreed level of operational performance, usually uptime, for a higher than normal period. ”  — Wikipedia HA in CloudStack is currently supported for VMs only. In order to have it enabled, the service offering of the VM should […]