severity 636463 wishlist
thanks
Hi Tim
This is certainly an interesting problem. The patch is a good start but
as we can foresee problems already now we need to find out a solution
to that before it is applied.
There is also one other problem. It is just a very limited number of
files that are actually installed during the initial install when
postcreate.sh is executing. Actually on my computer it was only anacron
that hold a file in that directory (that I have not created myself or installed
post initial install).
All other applications will have the same problem as before.
I can see two solutions:
1) postcreate.sh go through only the files that are actually created
on initial install and touch them in a similar way as your patch.
2) A new tool is introduced that should be run by the system administrator.
Do you have any opinion about this?
Best regards,
// Ola
On Wed, Aug 03, 2011 at 11:25:28AM +0100, Tim Small wrote:
> Package: vzctl
> Version: 3.0.24-12
> Severity: normal
> Tags: patch
>
> I sent this a few months ago, but it seems to have been eaten by a
> faulty MTA setup :-(.
>
> With multiple Debian VEs installed on a host, load spikes occur
> corresponding with cron job execution.
>
> On investigation, it appeared that /etc/vz/dists/scripts/postcreate.sh
> randomises run-times of entries in /etc/crontab, but doesn't touch stuff
> under /etc/cron.d/
>
> I'm not entirely sure that this patch is the correct answer (maybe it'll
> break things like rsnapshot - which needs to have it's entries run in the
> originally-specified order) - but it is at least a start...
>
> Tim.
>
> -- System Information:
> Debian Release: 6.0.2
> APT prefers stable
> APT policy: (500, 'stable')
> Architecture: amd64 (x86_64)
>
> Kernel: Linux 2.6.32-5-openvz-amd64 (SMP w/8 CPU cores)
> Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
> Shell: /bin/sh linked to /bin/dash
>
> Versions of packages vzctl depends on:
> ii iproute 20100519-3 networking and traffic control
> too
> ii libc6 2.11.2-10 Embedded GNU C Library: Shared
> lib
> ii vzquota 3.0.12-3 server virtualization solution -
> q
>
> Versions of packages vzctl recommends:
> ii rsync 3.0.7-2 fast remote file copy program
> (lik
>
> vzctl suggests no packages.
>
> -- Configuration Files:
> /etc/vz/cron/vz changed [not included]
> /etc/vz/dists/scripts/debian-set_hostname.sh changed [not included]
> /etc/vz/vz.conf changed [not included]
>
> -- no debconf information
>
> *** /tmp/openvz-postcreate-randomize-cron.d-too.patch
> --- postcreate.sh.old 2010-09-14 06:07:31.000000000 +0100
> +++ /etc/vz/dists/scripts/postcreate.sh 2011-08-03 09:27:22.490356610
> +0100
> @@ -24,12 +24,12 @@
>
> function randcrontab()
> {
> - file=${VE_ROOT}"/etc/crontab"
> + for file in ${VE_ROOT}/etc/cron.d/* ${VE_ROOT}/etc/crontab
> + do
> + [ -f "${file}" ] || return 0
>
> - [ -f "${file}" ] || return 0
> -
> - /bin/cp -fp ${file} ${file}.$$
> - cat ${file} | awk '
> + /bin/cp -fp ${file} ${file}.$$
> + cat ${file} | awk '
> BEGIN { srand(); }
> {
> if ($0 ~ /^[ \t]*#/ || $0 ~ /^[ \t]+*$/) {
> @@ -61,8 +61,9 @@
> }
> print line;
> }
> -' > ${file}.$$ && /bin/mv -f ${file}.$$ ${file}
> - /bin/rm -f ${file}.$$ 2>/dev/null
> + ' > ${file}.$$ && /bin/mv -f ${file}.$$ ${file}
> + /bin/rm -f ${file}.$$ 2>/dev/null
> + done
> }
>
> function disableroot()
>
>
>
--
--------------------- Ola Lundqvist ---------------------------
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| [email protected] 654 65 KARLSTAD |
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