Götz Reinicke wrote: > Ross S. W. Walker schrieb: > > Manuel Wolfshant wrote: > >> Götz Reinicke wrote: > >>> Hi, > >>> > >>> what would be the shortest and fastest way to clone a e.g. basic > >>> Centos 5 guest for further use? For example I'd like to set up a > >>> master Mysql-server as a guest an than "clone" two additional slaves. > >> I have a lvm "template", i.e. a simple volume with the OS > >> skeleton ( a > >> minimal install). When I need a new VM I do > >> - lvcreate newvolume > >> - mkfs newvolume > >> - mount template /mnt/source > >> - mount newvolume /mnt/destination > >> - cp -a /mnt/source /mnt/destination > >> > >> wash, rinse, repeat as needed. > >> > >>> Which xen configfiles may be edited? > >> cp /etc/xen/template /etc/xen/newVM > >> vim /etc/xen/newVM > >> > >> > >>> Can the config and the filesystem simply be copied? > >> yes. > > > > There is another approach too. You can set up your guests > > as virtual diskless servers which can net boot their > > configuration from dom0. Maybe iSCSI or blktap their > > root drives and overlay a configuration over / or /etc > > from NFS on dom0, or their whole configuration. > > > > You can definitely mash-up some good ideas with LTSP > > and Xen. > > > > I wish Xen had a virtual 10Gbe interface, then you can > > really do some nifty stuff! > > > > I personnally setup KDM or GDM in each domU to do XDMCP > > broadcast then I can pick which virtual guest to log into > > once it is up and running and with KDM/GDM user switching > > I open another session, pick a guest and get a full > > graphical login. > > That sounds realy cool; do you have any wiki or how to set this things > up. (I know that there are a lot of how tos, but they seem to handle > mostly special aspects ... ) I don't have time to write a wiki now, but the LTSP and K12 projects have extensive wikis on PXE boot/install, NFS root overlays and such, so that is where I would look first. I bet you could even take one of the CentOS 5 based LTSP respins install it, install xen via yum and you would have a good base to add in other features like iSCSI. Just treat your domUs as remote workstations, but with very fast and reliable 1Gbe connectivity. You can even create a separate xenbr for this to travel over along with a dom0 loop adapter and the traffic would run secure and segregated from the regular network traffic. I wonder if anybody has tested the performance of iSCSI to a domU for storage versus the blktap driver? I wonder if you could setup bonded interfaces with the loopback driver and the xen virtual interfaces... Hmmm, might be able to see 200+MB/s io on domUs by bonding 2 or 4 together and using iSCSI... -Ross ______________________________________________________________________ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender and permanently delete the original and any copy or printout thereof.