Script to create a MongoDB Collectd Plugin - Works with RightScale's monitoring and alerts

Mongodb_secondary_lag

#!/bin/bash -ex
#
# Description: Graph how old the last sync was between primary and secondary mongo instances.
# 
# Base code and idea thanks to: Edward M. Goldberg
#                             
# any mistakes courtesy of: Dennis Faust        
#
if [ $RS_DISTRO = ubuntu ]; then
  plugin_dir="/etc/collectd/conf"
elif [ $RS_DISTRO = centos ]; then
  plugin_dir="/etc/collectd.d"
fi

echo "*** This sets up a collectd plugin container"
cat <<"EOF" >$plugin_dir/MongoDB-lag.conf
LoadPlugin exec
<Plugin exec>
  Exec "mongodb" "/usr/local/bin/plugin-mongolag.sh"
</Plugin>
EOF

echo "*** This is called by the container"
cat <<"EOF" >/usr/local/bin/plugin-mongolag.sh
#!/bin/bash 
#
while sleep 5; do
  VALUE=`echo "db.printSlaveReplicationInfo()" | mongo | grep secs | head -1 | cut -f2 -d'=' | cut -f1 -d's' | cut -f2 -d' ' `
  echo "PUTVAL \"REPLACE/mongo/gauge-secondary_lag_secs\" interval=5 N:$VALUE"
done
EOF

sed -i "s/REPLACE/$SKETCHY_UUID/g" /usr/local/bin/plugin-mongolag.sh

chmod 777 /usr/local/bin/plugin-mongolag.sh

service collectd restart

exit 0 # leave with a smile...