AIR Wiki: Changelog Rembrandt Cluster

Changelog Rembrandt Cluster

Please put newest item first

See also ChangeLogRembrandt2004 and ChangeLogRembrandt2005

Inconsistancy in Ramdisk Names Fixed

2006-11-23 by Hans Blom
Why: The initrd lines in /boot/grub/menu.lst were removed during dist-upgrade
Where: Hosts "rembrandt3-6"
How:

The inconstantly named ramdisks initrd-KernelVersion.img were replaced by the more consistantly named initrd.img-KernelVersion with the following steps:

Rebooted hosts with the working distribution kernel 2.6.8-10-amd64-k8-smp.
Created ramdisk initrd.img-2.6.18.2, copied it to /boot and adjusted /boot/grub/menu.lst.
Removed the inconsistant named initrd-2.6.18.2.img from /boot and the kernel version source root dir.
Rebooted the hosts with the default kernel 2.6.18.2.
Fixed the other, older build kernel versions correspondingly, but without testing these kernels.
Adjusted the kernel build information in ChangeLogRembrandt2005 to avoid the same mistake in the future.

The other Rembrandt hosts will follow during the building of new kernels.

RAID Partition `/space` Not Longer in `updatedb` Database

2006-10-25 by Hans Blom
Why: Command locate is slow if /space is large
Where: All Rembrandt Hosts
How:

Added /space to the PRUNEPATHS variable in the configuration file /etc/updatedb.conf.

Installed MySQL

2006-07-19 by Hans Blom
Why: Required for the DVC/PIN/PDC experiments
Where: Hosts Rembrandt3-6
How:

Created a special user for MySQL.
As that user build from source MySQL and installed it under ~/MySQL.

Changed APT Sources List

2006-06-28 by Jeroen van der Ham and Hans Blom
Why: The AMD-64 packages were taken into the main stream
Where: All Rembrandt Hosts
How:

In /etc/apt/sources.list the known mirror is set to:
deb http://ftp.nl.debian.org/debian/∞ testing main contrib non-free
Make the server trusted ny running the commands:
# gpg --keyserver wwwkeys.eu.pgp.net --recv-keys 010908312D230C5F
# gpg --armor --export 010908312D230C5F | apt-key add -

Stopped Ganlia Monitor and Removed Start-Stop Scripts

2006-05-07 by Hans Blom
Why: The Ganlia monitor was only needed by Tier-1
Where: All Rembrandt Hosts
How:

Stop a running Ganlia monitor with:
- invoke-rc.d ganglia-monitor stop
Remove the start-stop links from the rc*.d directories (option -f: allow that /etc/init.d/ganglia-monitor exists):
- update-rc.d -f ganglia-monitor remove
With the following command the start-stop links can be placed back (it looks like that at Debian for packages always S20 or K20) is used:
- update-rc.d ganglia-monitor defaults
After an upgrade these commands should be probably rerunned. Alternatively the ganglia-monitor package could be removed.

Reinstalled Default `nfs-user-server` Package

2006-05-02 by Hans Blom
Why: The fixes in the patched package did not solve the log messages
Where: Host "rembrandt0"
How:

Also after installation of the patched package (see next item) there were still "fd cache inconsistency!" log messages. From a view in the code I got the impression that the reported bug was not really a bug. Therefore, the default nfs-user-server package was reinstalled with the command:

apt-get --reinstall install nfs-user-server

Patch and Install `nfs-user-server` Package

2006-05-02 by Hans Blom
Why: Problems with the package
Where: Host "rembrandt0"
How:

In bug #353329 from http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=353329∞ a bug in the so called fs cache initialization was reported leading to "fd cache inconsistency!" messages. The maintainer of the nfs-user-server confirned that the bug fix reported there was correct but found until now no time to path the package. Therefore we build the package from source and installed it with the following steps:

Download the sources from
Unpack the archives.
Apply the patch to nfs-user-server-2.2beta47/fh.c. In fact the patch was for an older subversion of this package so add the declaration line
int i;
and the initialization lines
for (i = 0; i< FOPEN_MAX; i++) {
fd_cache[i] = NULL;
}
by hand in the function fh_init() at the appropriate place.
Create the package from source by running the commands as normal user in the download directory:
- dpkg-source -x nfs-user-server_2.2beta47-22.dsc
- cd nfs-user-server_2.2beta47-22
- dpkg-buildpackage -us -uc -rfakeroot
Install the package as root from the download direcory:
- dpkg -i nfs-user-server_2.2beta47-22_i386.deb

Unfortunately the "fd cache inconsistency!" from nfsd are still found in the log files.

Install of NfSen `init.d` Script

2006-04-13 by Hans Blom
Why: To start/stop the NfSen monitor at system startup/shutdown
Where: Host "rembrandt0"
How:

Create the /etc/init.d/nfsen script. Basically this script uses the /usr/local/NFSen/bin/nfsen.rc that is supplied by the tool.
Create the start-stop links in /etc/rc[0-6].d. The used start (stop) IDs, S95 (K95), are derived from the start (stop) IDs used in the Debian Apache2 package, S91 (K91).

Syslog Reconf. in Combination with NFDump and NfSen

2006-04-06 by Hans Blom
Why: These tools are very noisy in the syslog
Where: Host "rembrandt0"
How:

Change in nfcapd.c van de NFDump Netflow collector tool
#define SYSLOG_FACILITY LOG_DAEMON

into
#define SYSLOG_FACILITY LOG_LOCAL3

to make the syslog facility equal to the one of the NfSen graphical representation tool.
Changing /etc/syslog.conf such that for facility local3 only priorities warn and higher will be added to /var/log/debug.
Reload syslog with /etc/init.d/sysklogd reload.

Backup of `/home` and `/space` VanGogh Cluster

2006-01-10 by Hans Blom
Why: The VanGogh cluster will be reinstalled
Where: Host "rembrandt0"
How:

Create directories /space/backup/vangogh_node/{SPACE,HOME}.
Copy from each VanGogh host via a help user the content to "rembrandt0" and unpack it there as root. For instance for /space/user at "vangogh0":
- cd /space && tar cfv - user | gzip -c --fast | ssh -l help_user rembrandt0 'cat >help_file.tar.gz'
- cd /space/backup/vangogh0/SPACE && tar xfvz help_file.tar.gz && rm help_file.tar.gz

Example Entry 2005-04-01 by FreekDijkstra Why: Because I need an example Where: Here How: Typing text ;-) Categories CategoryLogs