Munin contributed plugins

#!/bin/sh

# -*- sh -*-

: << =cut

=head1 NAME

postfix_mailqueue - Plugin to monitor postfix mail spools

=head1 ABOUT

A guide to postfix mail queue manageent can be found at

L<http://www.postfix.org/QSHAPE_README.html#queues>

A summary:

=over 4

=item maildrop

Messages that have been submitted via the Postfix sendmail(1) command,

but not yet brought into the main Postfix queue by the pickup(8)

service.

=item hold

Messages placed in the "hold" queue stay there until the administrator

intervenes

=item incoming

Inbound mail from the network, or mail picked up by the local

pickup(8) daemon from the maildrop directory.

=item active

Messages that the queue manager has opened for delivery. Only a limited number

of messages is allowed to enter the active queue (leaky bucket strategy, for a

fixed delivery rate).

=item deferred

Mail that could not be delivered upon the first attempt. The queue manager

implements exponential backoff by doubling the time between delivery attempts.

=item corrupt

Unreadable or damaged queue files are moved here for inspection.

=back

=head1 CONFIGURATION

By default "postconf -h queue_directory" is used to determine the

spool directory.  Is postconf is not available in the $PATH then

/var/spool/postfix is assumed.  This can be overridden by the

"spooldir" environment variable like so:

 [postfix_mailqueue]

    env.spooldir /var/spool/postfix

=head1 AUTHOR

Unknown.

=head1 LICENSE

Unknown.

=head1 MAGIC MARKERS

=begin comment

These magic markers are used by munin-node-configure when installing

munin-node.

=end comment

 #%# family=auto

 #%# capabilities=autoconf

=cut

# atempt to get spooldir via postconf, but environment overrides.

# Remember that postconf is not available unless postfix is.

POSTCONFSPOOL="$(postconf -h queue_directory 2>/dev/null || echo /var/spool/postfix)"

SPOOLDIR=${spooldir:-$POSTCONFSPOOL}

. $MUNIN_LIBDIR/plugins/plugin.sh

case $1 in

    autoconf|detect)

	if [ -d $SPOOLDIR ] ; then

	    echo yes

	    exit 0

        else

	    echo "no (spooldir not found)"

	    exit 0

        fi;;

    config)

	cat <<'EOF'

graph_title Postfix Queue Size

graph_vlabel KB in Queue

graph_category mail

graph_total Total

active.label active

deferred.label deferred

maildrop.label maildrop

incoming.label incoming

corrupt.label corrupt

hold.label held

EOF

	for field in active deferred maildrop incoming corrupt hold; do

		print_warning $field

		print_critical $field

	done

	exit 0;;

esac

cd $SPOOLDIR >/dev/null 2>/dev/null || {

     echo "# Cannot cd to $SPOOLDIR"

     exit 1

}

cat <<EOF

deferred.value `du -sb $SPOOLDIR/* | grep deferred | awk '{print $1}'`

active.value `du -sb $SPOOLDIR/* | grep active | awk '{print $1}'`

maildrop.value `du -sb $SPOOLDIR/* | grep maildrop | awk '{print $1}'`

incoming.value `du -sb $SPOOLDIR/* | grep incoming | awk '{print $1}'`

corrupt.value `du -sb $SPOOLDIR/* | grep corrupt | awk '{print $1}'`

hold.value `du -sb $SPOOLDIR/* | grep hold | awk '{print $1}'`

EOF