From: Chris Zimmerman <czimmer@wc...> - 2003-07-14 14:04:17
At the request of Matt Zimmerman (no relation that I know of... :-),
here is what I am attempting to do with UML. Please let me know if there
are any gaping holes in this:
To address our disaster recovery efforts at my place of employment, I have
decided to use a combination of mondo-archive and UML to create a "super
Linux" machine that will host all or most of our critical services
(WebSphere, DNS, FTP, etc) that are currently running on separate
machines. To gain the highest level of performance, especially for
WebSphere, I would restore the mondo images directly to separate LVM
logical volumes on the host. Then, using UML I would start the system up
and run it normally. From a disaster recovery standpoint, this would
simply require a regularly scheduled imaging of the systems and regular
updates to the "super" machine. We can then use mondo-archive to image
the host system with all of the instances installed and lay it out in a
single shot on the disaster recovery equipment.
So far, I have successfully cloned a SuSE 7.3 machine (actually the host
itself) and started it in UML by mounting all of the LV's to a directory
tree and reconfiguring it to use hostfs for the filesystem type. I am
also running in skas mode and with TUN/TAP networking. The system starts
fine (there are a few errors, but nothing that is a show stopper) and the
network works well. My plan for DNS is to simply grab a pre-built rootfs
with bind only and set it up as a slave to the master internal DNS
All of this is running with kernel 2.4.21 (UML and host kernels).
So, has anyone tried something similar to this? I would love to hear
ideas on anything.
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