Gabriel, You need to follow the update instructions carefully.
Yes, it means stopping all your management servers, but all guest VMs continue to run. The upgrade should be relatively quick, but it does involve updating the system VM template and restarting system VMs so they get updated. Remember to backup before upgrading, and ideally test the upgrade process on a test rig if you have never upgraded before. Regards Geoff Higginbottom CTO / Cloud Architect D: +44 20 3603 0542<tel:+442036030542> | S: +44 20 3603 0540<tel:+442036030540> | M: +447968161581<tel:+447968161581> geoff.higginbot...@shapeblue.com<mailto:geoff.higginbot...@shapeblue.com> | www.shapeblue.com ShapeBlue Ltd, 53 Chandos Place, Covent Garden, London, WC2N 4HS On 1 Nov 2013, at 18:27, "Gabriel Br?scher" <gabrasc...@gmail.com<mailto:gabrasc...@gmail.com>> wrote: Hi all, On the university laboratory that I work we have a cloud environment using Cloudstack as the management tool. So far, we have 2 Cloudstack servers and a load balancing apache server, both CS are on 4.1.1 version. Now we are starting to plan the update to the 4.2 version, mostly because of some important fixes that have been updated. The upgrade has to be done with the cloud running, so, we are going to update each CS server at time, in some point on the update process we are going to end up with one CS on 4.2 version and other on 4.1.1, could it create some problems? I noticed that the systems VMs templates were updated, so what does the CS 4.2 would do when it gets up and running and finds a system VM that was created by the CS 4.1.1? Are the CS updates meant to be done with the whole management structure down or they have support to get this job done with everything up and running? Thanks. Gabriel. This email and any attachments to it may be confidential and are intended solely for the use of the individual to whom it is addressed. Any views or opinions expressed are solely those of the author and do not necessarily represent those of Shape Blue Ltd or related companies. If you are not the intended recipient of this email, you must neither take any action based upon its contents, nor copy or show it to anyone. Please contact the sender if you believe you have received this email in error. Shape Blue Ltd is a company incorporated in England & Wales. ShapeBlue Services India LLP is a company incorporated in India and is operated under license from Shape Blue Ltd. Shape Blue Brasil Consultoria Ltda is a company incorporated in Brasil and is operated under license from Shape Blue Ltd. ShapeBlue is a registered trademark.