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.
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.
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.
Marvin: “I think you ought to know I’m feeling very depressed.” Trillian: “Well, we have something that may take your mind off it.” Marvin: “It won’t work, I have an exceptionally large mind.“ Trillian was born from the need for us to create environments which we could run CloudStack’s Marvin test framework against, but the […]
An oft-cited limitation in Apache CloudStack is the lack of granular access controls. Historically, when creating an account, there have been four built-in roles to choose from: Root Admin, Resource Admin, Domain Admin, and User. Unfortunately, these built-in roles have been insufficient for the needs of many organizations, who have resorted to various workarounds. Thankfully, this will change in […]
While, in my opinion VMware’s vSphere is the best performing and most stable hypervisor available, vCenter obstinately remains a single point of failure when using vSphere and it’s no different when leveraging vCenter in a CloudStack environment. Therefore, very occasionally there is a requirement to rebuild a vCentre server which was previously running in your […]
Recently we’ve seen a few clients being tripped up by the System VM upgrades during the CloudStack upgrades in multi-zone deployments. The issue occurs when the System VM is pre-deployed individually to multiple zones, rather than being a single template deployed to multiple zones. This may be done in error or because the specific version […]
Paul Angus, Cloud Architect at ShapeBlue takes an interesting look at how to separate Cloudstack’s management traffic from its primary storage traffic. I recently looked at physical networking in a CloudStack environment and alluded to the fact that you cannot separate primary storage traffic from management traffic from CloudStack, but that it is still possible. […]
Once again Trend Micro played host to the CloudStack European user group. And this quarter with Giles Sirett ‘working’ at CloudStack Day – Brazil, Geoff Higginbottom CTO of ShapeBlue took to the stage to compare the event. The News As is customary at the user group, we kicked off with a roundup of news in […]
As a cloud infrastructure scales to hundreds or thousands of servers, high availability becomes a key requirement of the production environments supporting multiple applications and services. Since the management servers use a MySQL database to store the state of all its objects, the database could become a single point of failure. The CloudStack manual recommends […]