Kiran Jonnalagadda’s Blog

I manage a box with multiple Zope installations. It’s been running low on memory lately, causing one of the older Zope installations to freeze every couple of days. I put together this simple script to monitor Zope’s status, as a standby until a proper solution is found. It’s a simplified version of a script originally written in 2000, when Zope was unstable enough to need it.

#!/bin/sh

cd `dirname $0`
SCRIPTHOME=`pwd`

if (wget http://localhost:8080/ --delete-after -t 1 -T 120 >& /dev/null) ; then
  # Zope is alive
  if [ -f $SCRIPTHOME/zope-status.down ] ; then
    rm -f $SCRIPTHOME/zope-status.down
    touch $SCRIPTHOME/zope-status.up
  fi
else
  # Zope is dead
  if [ -f $SCRIPTHOME/zope-status.up ] ; then
    rm -f $SCRIPTHOME/zope-status.up
    touch $SCRIPTHOME/zope-status.down
    $SCRIPTHOME/zopectl restart
  fi
fi

To use, dump this in your Zope’s bin folder, change the 8080 to whatever port your server is running, set the initial status flag …

$ touch zope-status.up

… and setup a cron job for the user account:

*/5 * * * * ~/zinstance2.7/bin/zopecheck.sh