[Yum] Additional script "yum-check" to run from /etc/cron.daily/yum.cron.

[michael at heiming.de (Michael Heiming)]

Michael Heiming wrote:
> Hi!
> 
> In comp.os.linux.misc there came up a question yesterday:
> 
> "Yum -y updating of a PRODUCTION WebServer"
> 
> Someone pointed out an available "cron-apt" package only 
> checking/mailing for apt updates. Nice idea, find my yum version below 
> which should do the same using yum.
> 
> Added:         /usr/bin/yum-check
> Added:         /etc/sysconfig/yum

     Now:	 /etc/sysconfig/yum-check

To prevent any confusion with /etc/yum.conf

> Modified:     /etc/cron.daily/yum.cron
> 
> Perhaps it's useful for people wanting to run yum manually without 
> abandoning checking for updates from cron and receive alerts via mail, 
> if there are patches available?

Fixed a few things, like randomizing startup if running as desired from 
cron.

/usr/bin/yum-check:

#!/bin/bash
#
# Name:         yum-check
# Author:       Michael Heiming - 2005-03-11
# Function:     Run from cron to check for yum updates
#               and mail results
# Version:      0.7 (initial)
# 2005-03-12    0.8 randomize startup (cron only)
# Config:       /etc/sysconfig/yum

# Pull in sysconfig settings

. /etc/sysconfig/yum

maila=${MAILTO:=root}
yumdat="/tmp/yum-check-update.$$"
yumb="/usr/bin/yum"

if ! [ -t ]
then
         num=$RANDOM
         let "num %= ${RANGE:=1}"
         sleep $num
fi

#rm -f ${yumdat%%[0-9]*}*

$yumb check-update >& $yumdat

yumstatus="$?"

case $yumstatus in
         100)
                  cat $yumdat |\
                  mail -s "Alert ${HOSTNAME} updates available!" $maila
                  exit 0
;;
         0)
                 # Only send mail if debug is turned on
                 if [ ${CHECKWRK} = "yes" ];then
                 cat $yumdat |\
                 mail -s "Yum check succeeded ${HOSTNAME} zero patches 
available." $maila
                 fi
                 exit 0
;;
         *)
                 # Unexpected yum return status
                 (echo "Undefined, yum return status: ${yumstatus}" && \
                 [ -e "${yumdat}" ] && cat "${yumdat}" )|\
                 mail -s "Alert ${HOSTNAME} problems running yum." $maila
esac

[ -e "${yumdat}" ] && rm ${yumdat}

### END ###

/etc/cron.daily/yum.cron:

#!/bin/sh

# Pull in sysconfig settings

. /etc/sysconfig/yum-check


if [ -f /var/lock/subsys/yum ]; then

         if [ ${CHECKONLY} = "yes" ];then

                 /usr/bin/yum-check
         fi
         else


         /usr/bin/yum -R 10 -e 0 -d 0 -y update yum
         /usr/bin/yum -R 120 -e 0 -d 0 -y update

### End ###

/etc/sysconfig/yum-check:

# yes sets yum to check for updates and mail only if patches are available
# no does enable autoupdate if /var/lock/subsys/yum is available
CHECKONLY="no"
# defaults to root, leave empty if .forward/alias in place for root
MAILTO=""
# Set to yes for debugging only! You'll get a mail for each run!
CHECKWRK="no"
# Seconds to randomize startup, if running from cron to balance load
RANGE="3600"

### End ###


Any opinions about it?


Michael Heiming