Op Mon, 08 Jun 2015 16:06:41 -0600, schreef Bob Proulx: > Linux4Bene wrote: <snip> > Since /dev is dynamic anything done to it will evaporate after a reboot. > After a reboot it will all be as if nothing had been overwritten there. > If you get to the point of a reboot then there is nothing lingering > afterward. You would be in the clear. I would still exclude it of > course. The possibility of archiving /dev/mem for example makes me > nervous. :-)
Hehe indeed. I will change the tar command to exclude it completely. > http://marc.merlins.org/perso/linux/post_2014-01-06_My-Live-Upgrading- >Many-Thousands-of-Servers-ProdNG-talk-at-Linux_conf_au-2014.html > > Unfortunately the original paper is now 403 forbidden. I think that is > likely a mistake somewhere. But the Internet Archive Wayback Machine > has a copy if you want to browse it. > > https://web.archive.org/web/*/http://marc.merlins.org/linux/talks >ProdNG-LCA2014/Paper/ProdNG.pdf Thanks, the last links you posted worked. I'm very interested in reading about it. > As I recall one spot I don't think was as complete was the kernel both > running and otherwise. I think debtakeover required that the new system > run on the foreign system's kernel. Which is not always possible due to > system version differences. I think that is more of a problem now than > it was then. So for example replacing a RHEL 6 system with Jessie would > fail because jessie binaries require a newer kernel than the default > RHEL 6 kernel. But probably upgrading the kernel first with a native > backport and then doing the debtakeover process would get past that > problem. It still seems like software that can be useful today or are there other preferred (manual) ways of doing such a conversion? >> When I rebooted the system, it failed because the UUID was still the >> UUID of the main disk of the old system. > > Ah... Probably should 'grep -r $UUID /etc' for every mention of it. Another useful comment, thanks. > Are you using lvm or raid? If either of those then would probably want > to *avoid* overwriting the /etc/lvm or /etc/mdadm directories. Both of > those configs keep UUIDs in them. No, it's a fairly simple VPS, no raid or LVM. >> Bob, thanks for your thorough explanation & insight. > > It is an interesting problem. I am deep in the middle of installation > and setup all of the time. > > Bob Sounds very challenging and interesting at the same time :) Benedict -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: https://lists.debian.org/[email protected]
