Hi, assumed I have several Linuxes running in their domUs and need a failover solution for every system. dom0 is also running Linux. What is the better way: Setting up HA only for the dom0, or setting up HA within every single domU? Thanks, Rainer _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
What about http://www.redhatmagazine.com/2007/08/23/automated-failover-and-recovery-of-virtualized-guests-in-advanced-platform/ ? --Sadique Rainer Sokoll wrote:> Hi, > > assumed I have several Linuxes running in their domUs and need a > failover solution for every system. dom0 is also running Linux. > What is the better way: Setting up HA only for the dom0, or setting up > HA within every single domU? > > Thanks, > Rainer > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users > >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Hi, On Feb 7, 2008 6:18 AM, Rainer Sokoll <rainer@sokoll.com> wrote:> Hi, > > assumed I have several Linuxes running in their domUs and need a > failover solution for every system. dom0 is also running Linux. > What is the better way: Setting up HA only for the dom0, or setting up > HA within every single domU? >I would generally recommend every domU, since if you only put it in the dom0 then if a domU goes down it won''t fail-over. Also, it is better to run as little as possible in dom0 and leave the apps in domUs for security reasons as well. Regards, Todd> Thanks, > Rainer > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
I have implemented this setup with CentOS 5.1 and it works quite nicely. The web based cluster and storage administration is very easy to used compared to desktop tools available. I have 3 DL385G2''s w/14G memory, Dual Socket Dual Core AMD Opterons and Dual FC Connected to a StorageWorks MSA1000. Live Migration is very fast. There are a combination of image based domU''s running from a clustered partition shared by the clustered machines and domU''s running on Logical Volumes in Clustered Volume Groups that are also shared by the entire cluster. Jeff On Thu, 2008-02-07 at 20:43 +0530, Sadique Puthen wrote:> What about > http://www.redhatmagazine.com/2007/08/23/automated-failover-and-recovery-of-virtualized-guests-in-advanced-platform/ > ? > > --Sadique > > Rainer Sokoll wrote: > > Hi, > > > > assumed I have several Linuxes running in their domUs and need a > > failover solution for every system. dom0 is also running Linux. > > What is the better way: Setting up HA only for the dom0, or setting up > > HA within every single domU? > > > > Thanks, > > Rainer > > > > _______________________________________________ > > Xen-users mailing list > > Xen-users@lists.xensource.com > > http://lists.xensource.com/xen-users > > > > > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Am Donnerstag, 7. Februar 2008 schrieb Rainer Sokoll:> Hi, > > assumed I have several Linuxes running in their domUs and need a > failover solution for every system. dom0 is also running Linux. > What is the better way: Setting up HA only for the dom0, or setting up > HA within every single domU?Hi, I am currently working on a xen based cluster. 2 nodes, Heartbeat in dom0, small domUs for every service. (Not exactly every service, one for web, one for mail, one for ldap, one for db and so on, about 10 domUs at all) Linux-HA is keeping the domUs up and running. This is not failover of single services but entire domUs. The Xen resource script of Heartbeat can also monitor services of a domU and failover the entire domU if the service fails. Next advantage is that Heartbeat can take care about memory assigned to the domUs. As example: In normal operation 5 domUs are running on each node using all memory, if one node goes down, all 10 domUs run on a single node, Heartbeat can do the xm mem-set for you so that all domUs fit to the remaining node. So i would personally recommend running Linux-HA in DomU. Florian> Thanks, > Rainer > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users-- Florian Tischler mailto:flo_list2007@floti.at icq#11754147 _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Am Samstag, 8. März 2008 schrieb Florian Tischler: [...]> Linux-HA is keeping the domUs up and running. This is not failover of > single services but entire domUs. The Xen resource script of Heartbeat can > also monitor services of a domU and failover the entire domU if the service > fails. Next advantage is that Heartbeat can take care about memory assigned > to the domUs. As example: In normal operation 5 domUs are running on each > node using all memory, if one node goes down, all 10 domUs run on a single > node, Heartbeat can do the xm mem-set for you so that all domUs fit to the > remaining node. > > So i would personally recommend running Linux-HA in DomU.sorry, typo, would recommend running it in dom0. Florian -- Florian Tischler mailto:flo_list2007@floti.at icq#11754147 _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users