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ikshaar
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Joined: 23 Jul 2002
Posts: 1339
Location: Baltimore, MD
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 Posted: Tue Feb 25, 2003 3:39 pm Post subject: Aministration of a Gentoo cluster |
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Hi,
I am in the process of switching our 15-nodes cluster to Gentoo.
I'm using Gentoo for a year now, so I know enough about a single PC. But I am concern about management of a cluster.
I already read different threads about building binaries packages and sharing that folder to compile package only once and then emerge with binaries packages but I still don't know what to do about config files. The most boring part on my PC is to go through the etc-update (~45 config files to update one by one after upgrade to Gnome-2.2). Ok, these clusters will not have X or any WM, but I'm still curious what would be the best way : etc-update on each cluster one by one (tedious!) , or a brutal copy of /etc from a cluster already updated (dangerous?!).
As the only differences between clusters are the IP and the hostname, am I right to think that the two files that are cluster specific are /etc/conf.d/net for the IP and /etc/hostname for the hostname ? Is there any other I should be aware of ?
I would also appreciate any other advice about cluster management if you encounter specific problem with Gentoo.
Thanks
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"May God stands between you and harm in all the empty places where you must walk" - Babylon 5 |
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atac
Apprentice
Joined: 04 Jan 2003
Posts: 234
Location: haninge, swe
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| Posted: Wed Feb 26, 2003 2:40 pm Post subject: |
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i don't see why management on a gentoo cluster would be any diffrent from any other distro, other then the points you make 
i thought of it and one solution to your problem when copying the whole /etc would be to make symlinks for /etc/hostname and /etc/conf.d/net to, let's say /root/etc/hostname and /root/etc/conf.d/net, and there's where you keep the computer specific files ..
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zhenlin
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Joined: 09 Nov 2002
Posts: 1361
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| Posted: Wed Feb 26, 2003 2:55 pm Post subject: |
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| Code: |
# Saving the kernel attributed hostname to a file for future
# initialisation selection: see /etc/init.d/switch.
get_bootparam "adelie" && cat /proc/sys/kernel/hostname > ${svcdir}/hostname
get_bootparam "adelie" && einfo "Server/Node low-level initialisation..."
if checkserver
then
get_bootparam "adelie" && einfo "Server detected."
# swap needs to be activated *after* devfs has been mounted and *after*
# devfsd has been started, so that the fstab can be properly parsed
# and only if the server is initialized
ebegin "Activating swap"
/sbin/swapon -a &>/dev/null
eend 0
else
#
# Low-level Node Initialisation
#
einfo "Node detected."
ebegin "Importing local userspace on node"
try mount -t tmpfs none ${shmdir}
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Looks pretty suspicious to me... Here are all the mentions of adelie in /sbin:
| Code: |
functions.sh-214-# See the boot section of /sbin/rc for more details.
functions.sh-215-#
functions.sh-216-checkserver() {
functions.sh:217: # Only do check if 'gentoo=adelie' is given as kernel param
functions.sh:218: if get_bootparam "adelie"
functions.sh-219- then
functions.sh-220- [ "`cat ${svcdir}/hostname`" = "(none)" ] || return 1
functions.sh-221- fi
--
rc-156-
rc-157- # Saving the kernel attributed hostname to a file for future
rc-158- # initialisation selection: see /etc/init.d/switch.
rc:159: get_bootparam "adelie" && cat /proc/sys/kernel/hostname > ${svcdir}/hostname
rc-160-
rc:161: get_bootparam "adelie" && einfo "Server/Node low-level initialisation..."
rc-162- if checkserver
rc-163- then
rc:164: get_bootparam "adelie" && einfo "Server detected."
rc-165-
rc-166- # swap needs to be activated *after* devfs has been mounted and *after*
rc-167- # devfsd has been started, so that the fstab can be properly parsed
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Something to do with clusters I'd imagine, so I'm told. |
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zhenlin
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Joined: 09 Nov 2002
Posts: 1361
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Networking & Security
