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|
#!/usr/bin/env bash
#
# Expose various types of information about lvm2
#
# Usage: lvm-prom-collector <options>
#
# Options:
#
# -g for used and free space of logical volume groups
# -p for used and free space of physical volumes.
# -s for the percentage usage of the snapshots
# -t for the percentage usage of the thin pools
#
# * * * * * root lvm-prom-collector -g | sponge /var/lib/prometheus/node-exporter/lvm.prom
#
# This will expose every minute information about the logical volume groups
#
# Author: Badreddin Aboubakr <badreddin.aboubakr@ionos.com>
set -eu
# Ensure predictable numeric / date formats, etc.
export LC_ALL=C
display_usage() {
echo "This script must be run with super-user privileges."
echo "Usage: lvm-prom-collector options"
echo "Options:"
echo "Expose various types of information about lvm2"
echo "Use -g for used and free space of logical volume groups."
echo "Use -p for used and free space of physical volumes."
echo "Use -s for the percentage usage of snapshots."
echo "Use -t for the percentage usage of thin pools."
}
if [ "$(id -u)" != "0" ]; then
1>&2 echo "This script must be run with super-user privileges."
exit 1
fi
if [ $# -eq 0 ]; then
display_usage
exit 1
fi
thin_pools=false
snapshots=false
physical=false
groups=false
while getopts "ahtpsg" opt; do
case $opt in
a)
thin_pools=true
snapshots=true
physical=true
groups=true
;;
p)
physical=true
;;
s)
snapshots=true
;;
g)
groups=true
;;
t)
thin_pools=true
;;
h)
display_usage
exit 0
;;
\?)
display_usage
exit 1
;;
esac
done
if [ "$physical" = true ]; then
echo "# HELP node_physical_volume_size Physical volume size in bytes"
echo "# TYPE node_physical_volume_size gauge"
echo "# HELP node_physical_volume_free Physical volume free space in bytes"
echo "# TYPE node_physical_volume_free gauge"
pvs_output=$(pvs --noheadings --units b --nosuffix --nameprefixes --unquoted --options pv_name,pv_fmt,pv_free,pv_size,pv_uuid 2>/dev/null)
echo "$pvs_output" | while IFS= read -r line; do
# Skip if the line is empty
[ -z "$line" ] && continue
# shellcheck disable=SC2086
declare $line
echo "node_physical_volume_size{name=\"$LVM2_PV_NAME\", uuid=\"$LVM2_PV_UUID\", format=\"$LVM2_PV_FMT\"} $LVM2_PV_SIZE"
echo "node_physical_volume_free{name=\"$LVM2_PV_NAME\", uuid=\"$LVM2_PV_UUID\", format=\"$LVM2_PV_FMT\"} $LVM2_PV_FREE"
done
fi
if [ "$snapshots" = true ]; then
echo "# HELP node_lvm_snapshots_allocated percentage of allocated data to a snapshot"
echo "# TYPE node_lvm_snapshots_allocated gauge"
lvs_output=$(lvs --noheadings --select 'lv_attr=~[^s.*]' --units b --nosuffix --unquoted --nameprefixes --options lv_uuid,vg_name,data_percent 2>/dev/null)
echo "$lvs_output" | while IFS= read -r line; do
# Skip if the line is empty
[ -z "$line" ] && continue
# shellcheck disable=SC2086
declare $line
echo "node_lvm_snapshots_allocated{uuid=\"$LVM2_LV_UUID\", vgroup=\"$LVM2_VG_NAME\"} $LVM2_DATA_PERCENT"
done
fi
if [ "$thin_pools" = true ]; then
lvs_output=$(lvs --noheadings --select 'lv_attr=~[^t.*]' --units b --nosuffix --unquoted --nameprefixes --options lv_uuid,vg_name,data_percent,metadata_percent 2>/dev/null)
echo "# HELP node_lvm_thin_pools_allocated percentage of allocated thin pool data"
echo "# TYPE node_lvm_thin_pools_allocated gauge"
echo "$lvs_output" | while IFS= read -r line; do
# Skip if the line is empty
[ -z "$line" ] && continue
# shellcheck disable=SC2086
declare $line
echo "node_lvm_thin_pools_allocated{uuid=\"$LVM2_LV_UUID\", vgroup=\"$LVM2_VG_NAME\"} $LVM2_DATA_PERCENT"
done
echo "# HELP node_lvm_thin_pools_metadata percentage of allocated thin pool metadata"
echo "# TYPE node_lvm_thin_pools_metadata gauge"
echo "$lvs_output" | while IFS= read -r line; do
# Skip if the line is empty
[ -z "$line" ] && continue
# shellcheck disable=SC2086
declare $line
echo "node_lvm_thin_pools_metadata{uuid=\"$LVM2_LV_UUID\", vgroup=\"$LVM2_VG_NAME\"} $LVM2_METADATA_PERCENT"
done
fi
if [ "$groups" = true ]; then
echo "# HELP node_volume_group_size Volume group size in bytes"
echo "# TYPE node_volume_group_size gauge"
echo "# HELP node_volume_group_free volume group free space in bytes"
echo "# TYPE node_volume_group_free gauge"
vgs_output=$(vgs --noheadings --units b --nosuffix --unquoted --nameprefixes --options vg_name,vg_free,vg_size 2>/dev/null)
echo "$vgs_output" | while IFS= read -r line; do
# Skip if the line is empty
[ -z "$line" ] && continue
# shellcheck disable=SC2086
declare $line
echo "node_volume_group_size{name=\"$LVM2_VG_NAME\"} $LVM2_VG_SIZE"
echo "node_volume_group_free{name=\"$LVM2_VG_NAME\"} $LVM2_VG_FREE"
done
fi
|
