Hi, I was wondering if there is software out there for Xen which will handle high availability for a cluster of servers. By high availability here I mean if one of the Xen physical nodes should die, the VMs from that host will be started on other nodes. I know something like this can be achieved with linux ha for a pair of servers, but I''m looking for something which will work across 5 or more servers and I can''t see anything documented for this. Jeff Williams wherethebitsroam.com _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
CentOS cluster (RHCS) will do this. -- John madden Sr UNIX Systems Engineer Ivy Tech Community College of Indiana jmadden@ivytech.edu On Apr 30, 2009, at 19:56, "Jeff Williams" <jeffw@globaldial.com> wrote:> Hi, > > I was wondering if there is software out there for Xen which will > handle high availability for a cluster of servers. By high > availability here I mean if one of the Xen physical nodes should > die, the VMs from that host will be started on other nodes. I know > something like this can be achieved with linux ha for a pair of > servers, but I''m looking for something which will work across 5 or > more servers and I can''t see anything documented for this. > > Jeff Williams > wherethebitsroam.com > > _______________________________________________ > 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 was wondering if there is software out there for Xen which will handle > high availability for a cluster of servers. By high availability here I > mean if one of the Xen physical nodes should die, the VMs from that host > will be started on other nodes. I know something like this can be > achieved with linux ha for a pair of servers, but I''m looking for > something which will work across 5 or more servers and I can''t see > anything documented for this.I would look at two projects that are starting to come into the mainstream of Xen: Project Remus and Kemari.>From http://www.xen.org/community/projects.html# Project Kemari - (Contact: Yoshi Tamura) * Definition: Virutal machine sychronization for fault tolerance * Links: Abstract - Xen Summit Boston 2008 Presentation - Video (368 MB) - Demo (11 MB) Project Remus - http://blog.xen.org/index.php/2009/04/02/project-remus-released/ Thanks. Stephen Spector _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Jeff Williams wrote:> Hi, > > I was wondering if there is software out there for Xen which will handle > high availability for a cluster of servers. By high availability here I > mean if one of the Xen physical nodes should die, the VMs from that host > will be started on other nodes. I know something like this can be > achieved with linux ha for a pair of servers, but I''m looking for > something which will work across 5 or more servers and I can''t see > anything documented for this.In what way is Linux HA limited to a pair of servers? The 2.x series supports up to 16 servers, OCFS2 supports at least 8, and most low end disk arrays i''ve worked with support at least 4 hosts per LUN. Paul _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Do you know Kemari? http://www.osrg.net/kemari/ On Sat, May 2, 2009 at 12:24 AM, Paul Gear <paul@gear.dyndns.org> wrote:> Jeff Williams wrote: >> Hi, >> >> I was wondering if there is software out there for Xen which will handle >> high availability for a cluster of servers. By high availability here I >> mean if one of the Xen physical nodes should die, the VMs from that host >> will be started on other nodes. I know something like this can be >> achieved with linux ha for a pair of servers, but I''m looking for >> something which will work across 5 or more servers and I can''t see >> anything documented for this. > > In what way is Linux HA limited to a pair of servers? The 2.x series > supports up to 16 servers, OCFS2 supports at least 8, and most low end > disk arrays i''ve worked with support at least 4 hosts per LUN. > > Paul > > > _______________________________________________ > 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
On 02/05/09 06:24, Paul Gear wrote:> Jeff Williams wrote: > >> Hi, >> >> I was wondering if there is software out there for Xen which will handle >> high availability for a cluster of servers. By high availability here I >> mean if one of the Xen physical nodes should die, the VMs from that host >> will be started on other nodes. I know something like this can be >> achieved with linux ha for a pair of servers, but I''m looking for >> something which will work across 5 or more servers and I can''t see >> anything documented for this. >> > > In what way is Linux HA limited to a pair of servers? The 2.x series > supports up to 16 servers, OCFS2 supports at least 8, and most low end > disk arrays i''ve worked with support at least 4 hosts per LUN. > >Paul, I saw on the Linux HA site that version 2 supported more than 2 hosts, but I couldn''t find documentation for it anywhere. Is there any documentation or examples for this that anyone knows about? Is anyone using this for more than 2 nodes? I''ve got no issues on the storage side, it''s just automatically restarting the VMs in the case of node failure that I am after. Thanks, Jeff _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Hi, The core of heartbeat v2 is the CRM (Cluster Resource Manager). The Pacemaker is the name of a project derived of heartbeat ( pacemaker ~crm ) that support two message layer( Heartbeat and openais) with Cluster Resource manager in top. Im configuring a Xen-HA with two server, and this manual is being very useful. http://clusterlabs.org/mediawiki/images/f/fb/Configuration_Explained.pdf With this manual and heartbeat v2 (using crm) is possible understand how use more then two servers... On Sun, May 3, 2009 at 11:07 PM, Jeff Williams <jeffw@globaldial.com> wrote:> On 02/05/09 06:24, Paul Gear wrote: > >> Jeff Williams wrote: >> >> >>> Hi, >>> >>> I was wondering if there is software out there for Xen which will handle >>> high availability for a cluster of servers. By high availability here I >>> mean if one of the Xen physical nodes should die, the VMs from that host >>> will be started on other nodes. I know something like this can be >>> achieved with linux ha for a pair of servers, but I''m looking for >>> something which will work across 5 or more servers and I can''t see >>> anything documented for this. >>> >>> >> >> In what way is Linux HA limited to a pair of servers? The 2.x series >> supports up to 16 servers, OCFS2 supports at least 8, and most low end >> disk arrays i''ve worked with support at least 4 hosts per LUN. >> >> >> > Paul, > > I saw on the Linux HA site that version 2 supported more than 2 hosts, but > I couldn''t find documentation for it anywhere. Is there any documentation or > examples for this that anyone knows about? Is anyone using this for more > than 2 nodes? > > I''ve got no issues on the storage side, it''s just automatically restarting > the VMs in the case of node failure that I am after. > > Thanks, > Jeff > > > _______________________________________________ > 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