Ok,
After studying a little bit more the problem, I have a question that I have no
answer for.
Why have si_netbootmond been created while a better place to add this
monitoring would have been the monitoring source: si_monitor.
Indeed, si_monitor is aware in real time of the imaged status and this,
whatever the deployment solution is (bittorrent, rsyncd, flamethrower, ...)
In my precedent post, I though that looking for status 102 (rebooted) was the
solution, unfortunately, if client is set to netboot, a rinstall loop will
occure before the rebooted status had a chance to be sent to si_monitor.
So, I think that a rock solid solution would be to have the following
algoryhtm set in si_monitor.
have a si_monitor configuration parameter to enable or disable the netbootmond
feature.
if enabled, when receiving imaged (status 100) (or maybe finalizing (101) or
even rebooting (104), and if NET_BOOT_DEFAULT is set to local, then it would
run a:
si_mkclientnetboot --localboot --clients the client and optionally start a
timer. (configurable).
When timer expires, it would check the /var/lib/systemimager/clients.xml for
that client, and if rebooted (102) status is not there, then assumes that
reboot failed (bad boot loader, wrong fstab, garbage from postinstall script,
...) and revert the client to netboot so another imaging attempt can occure.
I admit that the netboot disabling could lead to endless loop doing failed
reimaging, but we could think about putting a no timout netboot waiting for a
keypress or a poweroff netboot or any other on-fail-to-reboot configurable
behavior.
Anyway, aside the timer option, the main purpose here is: why not
integrating si_netbootmond into si_monitor as we can benefit of real-time
client status without active waiting and we are independant of the deploying
method. (and it is also not that difficult to code mainly at line
si_monitor:390)
if(($client-{'status'} == 100) $netbootmond_option_enabled) {
system(si_mkclientnetboot --localboot --clients \$client-{'name'}\);
}
What do you think?
Best regards,
Olivier.
Le mercredi 23 juillet 2014 16:37:52 Olivier LAHAYE a écrit :
Dear all,
I'm working on si_netbootmond (in fact working on OSCAR side) and discovered
that si_netbootmond rely on the fact that the imaging method is rsync.
It monitors the rsyncd log file for magic works stating that imaging is
complete.
There are 2 problems here:
1/ It doesn't work for deployment using flamethrower / multicast or
bittorrent 2/ If a client is successfully imaged, this doesn't mean that it
is able to reboot (bad image, bad bootloader, ...) in this situation,
setting local boot is wrong as we certainly want to boot from net again in
order to re-image.
I see 3 solutions:
1/ replace the actual code that scans /var/log/systemimager/rsyncd for magic
words: /scripts\/imaging_complete_?([\.0-9]+)?/ with something that would
do something like:
use File::Monitor;
my $monitor = File::Monitor-new();
$monitor-watch('/var/lib/systemimager/clients.xml');
In a loop, searching for clients with status 102 (REBOOTED)
and run:
si_mkclientnetboot --localboot --clients the client
2/ Keep actual code and add an option to monitor client.xml instead
3/ drop or left si_netbootmond untouched and add an option to unable
updating the netboot to local in si_monitor. Indeed, si_monitor won't
require an active checking of a file. it is in blocking state on a socket
listenning for infos. if it receives message rebooted, then it could call
a:
si_mkclientnetboot --localboot --clients the client
Technically, solution 3 has the advantage of being passive while methode 1
and 2 are active listenning of node status change. Problem of solution 3 is
that I don't know if it's logic to have the hability to update netboot of
client in si_monitor, and I if si_monitor is not started, then no
possibility to update netboot.
What is the best solution?
Regards,
Olivier.
Cordialement,
Olivier.
--
Olivier Lahaye
DRT/LIST/DIR
--
Want fast and easy access to all the code in your enterprise? Index and
search up to 200,000 lines of code with a free copy of Black Duck
Code Sight - the same software that powers the world's largest code
search on Ohloh, the Black Duck Open Hub! Try it now.
http://p.sf.net/sfu/bds
___
sisuite-devel mailing list
sisuite-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/sisuite-devel
