Excellent!! Thanks :) Op 11 aug. 2014 22:25 schreef <[email protected]>:
> Hi All > > I updated the wiki: https://github.com/cobbler/cobbler/wiki > > Hopefully it will help someone out there (as lots of googling helps me) :) > > Alastair > > On 2014-08-10 06:39, Jörgen Maas wrote: > >> Hi Alastair, >> >> Great writeup. We do have a wiki where Cobbler users can share their >> solutions/experiences >> It would be great if you would be willing to put this information up >> there: https://github.com/cobbler/cobbler/wiki [4] >> >> I hope other users will be inspired to do the same :) >> >> On Sat, Aug 9, 2014 at 9:39 PM, <[email protected]> wrote: >> >> Hi >>> >>> Just wanted to share something with the list. When creating >>> triggers to say run a 'cobbler replicate' via ssh, etc, to remote >>> cobbler servers, the web page waits for the ssh at the remote end to >>> complete. This produced quite a delay if you are say updating a >>> system and waiting for the webpage to refresh. The reason for this >>> is it waits for the ssh to complete, even if you background it or >>> nohup/at/etc it. >>> >>> I found a way to daemonize the remote command. Using daemon from >>> here: http://libslack.org/daemon/ [1]. This daemonizes the ssh >>> command, thus giving an instant response. On centos/rhel 6, just >>> install the rpm. >>> >>> The other nice thing about daemon is the --name=something switch; >>> daemon will only allow the command to run if there is not another >>> daemon running with the same name. Thus you could put the same >>> command in cron to run every so often on the slave, to ensure its >>> kept up to date. This means the cron and trigger runs would never >>> clash, or subsequent cron runs would not clash with an earlier run. >>> For example if you add a new distro, the replicate command could >>> take a while to run to rsync across the new distro and the next cron >>> run may run into it. >>> >>> From our setup we have one master and three slaves. In effect one >>> cobbler server per site/data center. This means no installs across >>> wan links and our server builds are always setup with their yum >>> repos in the local site. However we have simple admin; only one >>> cobbler web and a standard config across all servers. Only have to >>> remember to set the server override for systems for the local site >>> cobbler server. We do a mix of pxe and generated.iso builds (both >>> are quite easy) >>> >>> # mkdir /usr/local/cobbler >>> # cd /var/lib/cobbler/triggers/add/system/post/ >>> # cat sync-slaves.sh >>> #!/bin/bash >>> >>> # A Munro 6 Aug 2014: sync slaves >>> # make sure you set up ssh keys for this... >>> >>> # space delimited list of slaves >>> SLAVES="gb-wat-svv-0600 us-ham-svv-0600 us-lou-svv-0600" >>> MASTER=cobbler >>> SSH="ssh -oConnectTimeout=2 -oStrictHostKeyChecking=no >>> -oUserKnownHostsFile=/dev/null -oBatchMode=yes -oLogLevel=quiet" >>> LOG=/var/log/cobbler/triggers.log >>> >>> [ -f $LOG ] && rm -f $LOG >>> >>> for h in $SLAVES >>> do >>> # slow way:background so they are done in parallel >>> # however ssh still waits for all the commands to complete >>> # $SSH $h "cobbler replicate --master=$MASTER --systems=* >>> --profiles=* --prune" 2>&1 >> $LOG & >>> # using daemon from http://libslack.org/daemon [2] is fast and >>> instantaneous. The run gets daemonized remotely and returns >>> instantly >>> $SSH $h "daemon --name=cob /usr/local/cobbler/sync-master.sh" >>> 2>&1 >> $LOG & >>> done >>> >>> # chmod u+x sync-slaves.sh >>> >>> On the slave: >>> >>> # cat /usr/local/cobbler/sync-master.sh >>> cobbler replicate --master=cobbler --systems=* --profiles=* --prune >>> >>> # chmod u+x /usr/local/cobbler/sync-master.sh >>> >>> _______________________________________________ >>> cobbler mailing list >>> [email protected] >>> https://lists.fedorahosted.org/mailman/listinfo/cobbler [3] >>> >> >> -- >> Grtz, >> Jörgen Maas >> >> Links: >> ------ >> [1] http://libslack.org/daemon/ >> [2] http://libslack.org/daemon >> [3] https://lists.fedorahosted.org/mailman/listinfo/cobbler >> [4] https://github.com/cobbler/cobbler/wiki >> >> _______________________________________________ >> cobbler mailing list >> [email protected] >> https://lists.fedorahosted.org/mailman/listinfo/cobbler >> > _______________________________________________ > cobbler mailing list > [email protected] > https://lists.fedorahosted.org/mailman/listinfo/cobbler >
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