Re: [Bacula-users] Rescue CD + multiple hosts

[<yan...@un...>]

Great for the 2.6 kernel !
I looked at the ML archive this afternoon and only seen that
it was not working, I might have missing an announce for that.
For the rest, I will first test if I really need differents kernels for
differents machines !

Just one more question : Can I use the cvs version of the rescue CD tools
only on the machine on which I create the ISO, and keeping 1.36.3  stable
versions on the other ones (from which I only copy "roottree") ?
I don't really like having cvs versions of software on my servers as it
is not really easy to keep up to date... :)

Thanks a lot for all your job !

Yann

Kern Sibbald a =E9crit :

>On Friday 27 May 2005 17:14, Yann C=E9zard wrote:
> =20
>
>>Hi list !
>>
>>I have some questions concerning the creation of the boot CD for bacula
>>in case of
>>multiple hosts. If I have correctly looked at the created iso, in fact
>>only the machine
>>on which the iso has been created will have its kernel and binaries on
>>CD, right ?
>>   =20
>>
>
>Yes.  However, the disk can boot on any machine with the same basic=20
>architecture.
>
> =20
>
>>It is OK when all the backuped machines share the same
>>kernel/configuration (so
>>which have quite the same hardware) but it should be wrong when having
>>differents
>>machine types (like somes using specific RAID drivers, something like
>>that I mean).
>>Am I still right at this point ?
>>   =20
>>
>
>The disk captures the state of a single system.  However, what is import=
ant in=20
>the caputured state when recoverying after booting is the=20
>bacula-<machine-name> directory.
>
>I run the rescue make on all my machines, then transfer each of the bacu=
la-xxx=20
>directories to a single disk (as documented in the manual if I am not=20
>mistaken), and then I have a boot disk that can recover all my machines.=
  The=20
>machine on which it was made has the bacula-xxx directory in memory. If =
you=20
>want to recover a different machine, you will need to copy the appropria=
te=20
>directory into memory to recover -- or run it directly from the CDROM.
>
> =20
>
>>Isn't there a way to have a boot CD allowing to choose between differen=
t
>>kernels
>>(one per machine) at boot time, like almost every distros installation
>>CD (which offers
>>differents flavors, a rescue mode...) ?
>>   =20
>>
>
>If you have multiple kernels loaded on a given machine, the disk will us=
e the=20
>one that is running. You can override it by setting the KERNEL variable =
in=20
>the makekernel file.
>
>If you want different kerenels for each machine, either you need to=20
>significantly increase the complexity of the scripts (pretty simple at t=
he=20
>moment), or much simpler, you simply make a separate boot disk for each=20
>machine.
>
> =20
>
>>Does someone has already done some work on this ?
>>
>>I think that such a feature would be a good idea, perhaps something to
>>look at when
>>the 2.6 kernels booting from CD problem has been resolved ;)
>>   =20
>>
>
>The 2.6 kernel boot from CD has been resolved for several weeks.  It is =
in the=20
>rescue project or module of the Bacula CVS -- it is no longer in the Bac=
ula=20
>source tree, but in its own tree.  The new stuff is not yet documented .=
..
>
> =20
>
>>Cheers,
>>
>>Yann
>>
>>
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>>
>
> =20
>