RE: [PROPOSAL] User VM HA using native XS HA capabilities

2013-11-27 Thread Alex Huang
hypervisor HA because of this. > > --Alex > > -Original Message----- > From: Koushik Das [mailto:koushik@citrix.com<http://citrix.com>] > Sent: Tuesday, November 26, 2013 10:51 PM > To: mailto:dev@cloudstack.apache.org>> > Subject: Re: [PROPOSAL] User VM

Re: [PROPOSAL] User VM HA using native XS HA capabilities

2013-11-27 Thread Koushik Das
egarding this. I generally don't think VM HA can be done with hypervisor HA because of this. --Alex -Original Message- From: Koushik Das [mailto:koushik@citrix.com<http://citrix.com>] Sent: Tuesday, November 26, 2013 10:51 PM To: mailto:dev@cloudstack.apache.org>> Sub

RE: [PROPOSAL] User VM HA using native XS HA capabilities

2013-11-27 Thread Alex Huang
k Das [mailto:koushik@citrix.com] > Sent: Tuesday, November 26, 2013 10:51 PM > To: > Subject: Re: [PROPOSAL] User VM HA using native XS HA capabilities > > I haven't tried in XS 6.1 but in 6.2 if a VM is marked as HA enabled (based on > ha-restart-priority) in a HA e

Re: [PROPOSAL] User VM HA using native XS HA capabilities

2013-11-26 Thread Koushik Das
I haven't tried in XS 6.1 but in 6.2 if a VM is marked as HA enabled (based on ha-restart-priority) in a HA enabled cluster then if the VM is not stopped using xapi then it is automatically re-started. I tried the following on XS 6.2 and it worked as expected: - Logged on to a guest VM marked as

Re: [PROPOSAL] User VM HA using native XS HA capabilities

2013-11-26 Thread Chiradeep Vittal
According to http://support.citrix.com/proddocs/topic/xencenter-61/xs-xc-pools-ha-about. html XS HA is about dealing with host failures. However CS HA also deals with individual VM failures ("fast restart"). I hope you are not removing fast VM restart. On 11/26/13 6:54 AM, "David Nalley" wrote:

Re: [PROPOSAL] User VM HA using native XS HA capabilities

2013-11-26 Thread David Nalley
Hi Koushik: Thanks for the reply - a few followup comments inline. I look forward to seeing this work. Other folks: please read the entire thread and the links from Koushik; there's a planned deprecation here. --David On Mon, Nov 25, 2013 at 2:38 AM, Koushik Das wrote: > Thanks for the comment

Re: [PROPOSAL] User VM HA using native XS HA capabilities

2013-11-25 Thread Koushik Das
Thanks for the comments David. See inline. -Koushik On 22-Nov-2013, at 7:31 PM, David Nalley wrote: > Hi Koushik: > > In general I like the idea. A couple of comments: > > The upgrade section has a manual step for enabling HA manually per > instance. Why a manual step? Why is CloudStack not c

Re: [PROPOSAL] User VM HA using native XS HA capabilities

2013-11-22 Thread David Nalley
Hi Koushik: In general I like the idea. A couple of comments: The upgrade section has a manual step for enabling HA manually per instance. Why a manual step? Why is CloudStack not checking the desired state (e.g. if HA is enabled in the instance service group) with the actual state (what is refle

Re: [PROPOSAL] User VM HA using native XS HA capabilities

2013-11-22 Thread Koushik Das
Initial draft of the FS https://cwiki.apache.org/confluence/display/CLOUDSTACK/User+VM+HA+using+native+XS+HA+capabilities -Koushik On 21-Nov-2013, at 9:59 AM, Koushik Das wrote: > Cloudstack relies on custom HA logic for user VMs running on Xenserver. The > reason for doing it like this may b

[PROPOSAL] User VM HA using native XS HA capabilities

2013-11-20 Thread Koushik Das
Cloudstack relies on custom HA logic for user VMs running on Xenserver. The reason for doing it like this may be due the fact that native HA capabilities in XS was not mature enough during the initial days. Also in the custom HA logic, Cloudstack has to correctly determine the state of a VM from