As far as ensuring MAC address and other guest domain's properties consistency across physical nodes is concerned, this is onetime activity. Using the following steps, one can make sure that MAC address is same across all physical nodes when a guest domain is made HA under VCS configuration.
If a virtual network of a guest domain is assigned a MAC address (belonging to 00:14:4f:fc:00:00-00:14:4f:ff:ff:ff range) manually, the same address can be used on other physical nodes for the guest domain. If user opts to let ldm software assign the MAC address, then this MAC address cannot be assigned to the guest domain on other nodes. After assigning the MAC address manually and configuring the LDom completely on one node, the LDom configuration can be exported in XML format (ldm list-constraints -x ldom > ldom-config.xml). This configuration file can be replicated on other physical nodes or kept on shared disk so that other nodes have visibility to the file. The path of the configuration file can be specified in the LDom resource configuration. If the guest domain is not already created where VCS brings the guest domain online, VCS will create the guest domain with same MAC address and other properties. Alternately, user can choose to manually create the guest domain using the exported configuration file (ldm add-domain -i ldom-config.xml). Vikas. -----Original Message----- From: [email protected] [mailto:ldoms-discuss-bounces at opensolaris.org] On Behalf Of Octave Orgeron Sent: Wednesday, September 24, 2008 3:13 PM To: Ashutosh Tripathi; Paul Roberts Cc: ldoms-discuss at opensolaris.org Subject: Re: [ldoms-discuss] LDOM "Clustering" Hi Everyone, Take a look at this wiki which has details on SC support for LDoms: http://wikis.sun.com/display/SunCluster/Sun+Cluster+3.2+2-08+Release+Not es#SunCluster3.22-08ReleaseNotes-optguestdomain The main thing to keep in mind is that you fail-over your applications between guest domains with SC. In that regard it's no different than if you have two stand-alone servers that are clustered, you fail-over the applications. Keeping the LDM configuration in-sync between multiple servers is not possible with SC or even VCS. I would see that as a key requirement in doing a full blown fail-over of a guest domain. VCS simply allows you to start/stop a guest domain that's already configured between the hosts. You can install VCS in "stand-alone" mode in your guest domains and have each guest domain be a "remote" resource in a cluster. So you could move a guest domain between hosts, but all the infrastructure (disks, networking, etc.) would have to be available across all hosts. It won't do any sanity checks for things like mac addresses, ldm configuration, etc. .. so it still requires one to be careful. Now on the flip side, in the future we'll have the ability to move a guest domain from one physical host to another without any clustering software. This will be known as "Live Migration". It has been mentioned a few times in our forum here. But basically, it'll give us a Vmotion type of functionality. That should probably be leveraged for moving a whole guest domain between servers. It is important to understand the difference between HA clustering and the mobility of virtual machines.. they are different things:) Much in the way that VMWare Vmotion is not HA clustering.. it's a method of making a virtual machine mobile:) It has no ability to monitor your applications and services within your virtual machine. This is where HA clustering for applications and services should come into play. *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* Octave J. Orgeron Solaris Systems Engineer http://www.opensolaris.org/os/community/sysadmin/ http://unixconsole.blogspot.com unixconsole at yahoo.com *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* ----- Original Message ---- From: Ashutosh Tripathi <[email protected]> To: Paul Roberts <P.Roberts at Sun.COM> Cc: ldoms-discuss at opensolaris.org Sent: Monday, September 22, 2008 6:03:54 PM Subject: Re: [ldoms-discuss] LDOM "Clustering" Hi Paul, Currently, to make a LDoms guest domain HA, you would run SC inside that guest domain, essentially treating it as a SC "node". If that "node" fails, all services within it would be failed over to other "node"s in the cluster and achieve HA that way. What you are suggesting is closer to the "Failover Guest domain" model (similar to "Failover Zones" model you seem to be alluding to). That is currently not possible, but we are looking very actively into it. Check out my blog entry: http://blogs.sun.com/SC/entry/ldoms_guest_domains_supported_as and comments on that entry. It seems several people are interested in it. Given that you are internal to SUN, can you contact me offline with your specific customer needs? That would help us prepare a business case and help move this along? Thanks, -ashu Paul Roberts wrote: > I've been searching for a while now regarding the best way to have HA > LDOMs. Currently, we are able to implement this solution: > > - 2 Physical Hosts - Node A and Node B > - Each running Sun Cluster 3.2 > - Using HAStoragePlus agent with ZFS + Zones (SUNWsczone) > - We're able to fail a zone/container over from Node A to Node B easily > and it works great and very easy to maintain > > Is there any way today to fail an LDOM over in the same manner? > Meaning, can I have ldm installed on both nodes and when one node (Node > A) goes down or I decide to failover the LDOM automatically comes up and > mounts the appropriate storage on the other node (Node B)? I apologize > if I am not being clear enough - feel free to ping me to ask more questions. > > Thanks for your help and guidance in advance, > > Paul Roberts > -- > ______ > /_____/\ > /_____\\ \ Paul Roberts > /_____\ \\ / Sun Microsystems, Inc. > /_____/ \/ / / Sun Serviceability and Readiness Ops > /_____/ / \//\ > \_____\//\ / / email: p.roberts at sun.com > <mailto:p.roberts at sun.com> > \_____/ / /\ / direct: 877-477-7642 > \_____/ \\ \ > \_____\ \\ > \_____\/ http://www.sun.com <http://www.sun.com/> > > > > > > > > ------------------------------------------------------------------------ > > _______________________________________________ > ldoms-discuss mailing list > ldoms-discuss at opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/ldoms-discuss _______________________________________________ ldoms-discuss mailing list ldoms-discuss at opensolaris.org http://mail.opensolaris.org/mailman/listinfo/ldoms-discuss _______________________________________________ ldoms-discuss mailing list ldoms-discuss at opensolaris.org http://mail.opensolaris.org/mailman/listinfo/ldoms-discuss
