Munin contributed plugins

#!/bin/bash

: <<=cut

=head1 NAME

xfs_frag - Munin plugin to monitor the fragmentation level on your XFS filesystems

=head1 APPLICABLE SYSTEMS

Any machine with an XFS file system.

=head1 CONFIGURATION

None, generally, but you may want to run as root and set a timeout.

  [xfs_frag]

  user root

  timeout 90

=head1 MAGIC MARKERS

  #%# family=auto contrib

  #%# capabilities=

=head1 VERSION

1

=head1 AUTHOR

Paul Saunders L<darac+munin@darac.org.uk>

=cut

declare -a TOKENS

shopt -s nocasematch

case $1 in

	config)

		cat <<'EOF'

graph_title XFS fragmentation

graph_vlabel Percent

graph_category disk

EOF

		awk '{print $2 " " $3}' </etc/mtab | while read -r LINE; do

			# shellcheck disable=SC2206

			TOKENS=($LINE)

			if [[ ${TOKENS[1]} =~ xfs ]]; then

				FIELDNAME=$(echo "${TOKENS[0]}" | sed 's/^[^A-Za-z_]/_/; s/[^A-Za-z0-9_]/_/g')

				echo "$FIELDNAME.label ${TOKENS[0]}"

				echo "$FIELDNAME.type GAUGE"

			fi

		done

		exit 0

		;;

esac

awk '{print $2 " " $3 " " $1}' </etc/mtab | while read -r LINE; do

	# shellcheck disable=SC2206

	TOKENS=($LINE)

	if [[ ${TOKENS[1]} =~ xfs ]]; then

		FIELDNAME=$(echo "${TOKENS[0]}" | sed 's/^[^A-Za-z_]/_/; s/[^A-Za-z0-9_]/_/g')

		FRAG=$(xfs_db -c frag -r "${TOKENS[2]}" | sed 's/.*fragmentation factor \(.*\)%.*/\1/')

		echo "$FIELDNAME.value $FRAG"

	fi

done