I tend to also move instances off and put the KVM host in maintenance before I upgrade them as an extra step. I don't think that's documented and it may be overkill but it gives me a better feeling with lowered risk.
> On Mar 6, 2014, at 11:47 PM, Shanker Balan <shanker.ba...@shapeblue.com> > wrote: > > Comments inline. > >> On 07-Mar-2014, at 7:33 am, Du Jun <dj199...@gmail.com> wrote: >> >> Hi all, >> >> I intend to upgrade from CS 4.2.0 to CS 4.2.1. I already have some VMs >> running in CS 4.2.0, how can I upgrade from CS 4.2.0 to CS 4.2.1 without >> affecting the VMs. > > http://cloudstack.apache.org/docs/en-US/Apache_CloudStack/4.2.1/html-single/Release_Notes/index.html#upgrade-from-4.2-to-4.2.1 > > I don’t think your VMs would be impacted during the upgrade. YMMV > >> PS: CS 4.2.0 with KVM hypervisor is installed in Ubuntu12.04. > > > > > -- > @shankerbalan > > M: +91 98860 60539 | O: +91 (80) 67935867 > shanker.ba...@shapeblue.com | www.shapeblue.com | Twitter:@shapeblue > ShapeBlue Services India LLP, 22nd floor, Unit 2201A, World Trade Centre, > Bangalore - 560 055 > > Need Enterprise Grade Support for Apache CloudStack? > Our CloudStack Infrastructure > Support<http://shapeblue.com/cloudstack-infrastructure-support/> offers the > best 24/7 SLA for CloudStack Environments. > > Apache CloudStack Bootcamp training courses > > **NEW!** CloudStack 4.2.1 training<http://shapeblue.com/cloudstack-training/> > 18th-19th February 2014, Brazil. > Classroom<http://shapeblue.com/cloudstack-training/> > 17th-23rd March 2014, Region A. Instructor led, > On-line<http://shapeblue.com/cloudstack-training/> > 24th-28th March 2014, Region B. Instructor led, > On-line<http://shapeblue.com/cloudstack-training/> > 16th-20th June 2014, Region A. Instructor led, > On-line<http://shapeblue.com/cloudstack-training/> > 23rd-27th June 2014, Region B. Instructor led, > On-line<http://shapeblue.com/cloudstack-training/> > > 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.