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# -----------------------------------------------------------------------------
# make sure we collect values for each disk
# for mount points
template: disk_space_last_collected_secs
on: disk.space
calc: $now - $last_collected_t
units: seconds ago
every: 10s
warn: $this > (($status >= $WARNING) ? (0) : ( 5 * $update_every))
crit: $this > (($status == $CRITICAL) ? (0) : (60 * $update_every))
delay: down 5m multiplier 1.5 max 1h
info: number of seconds since the last successful data collection of the mount point
to: sysadmin
# for block devices
template: disk_last_collected_secs
on: disk.io
calc: $now - $last_collected_t
units: seconds ago
every: 10s
warn: $this > (($status >= $WARNING) ? (0) : ( 5 * $update_every))
crit: $this > (($status == $CRITICAL) ? (0) : (60 * $update_every))
delay: down 5m multiplier 1.5 max 1h
info: number of seconds since the last successful data collection of the block device
to: sysadmin
# -----------------------------------------------------------------------------
# low disk space
# checking the latest collected values
# raise an alarm if the disk is low on
# available disk space
template: disk_space_usage
on: disk.space
calc: $used * 100 / ($avail + $used)
units: %
every: 1m
warn: $this > (($status >= $WARNING ) ? (70) : (80))
crit: $this > (($status == $CRITICAL) ? (85) : (95))
delay: up 1m down 15m multiplier 1.5 max 1h
info: current disk space usage
to: sysadmin
template: disk_inode_usage
on: disk.inodes
calc: $used * 100 / ($avail + $used)
units: %
every: 1m
warn: $this > (($status >= $WARNING) ? (75) : (80))
crit: $this > (($status == $CRITICAL) ? (90) : (95))
delay: up 1m down 15m multiplier 1.5 max 1h
info: current disk inode usage
to: sysadmin
# -----------------------------------------------------------------------------
# disk fill rate
# calculate the rate the disk fills
# use as base, the available space change
# during the last hour
# this is just a calculation - it has no alarm
# we will use it in the next template to find
# the hours remaining
template: disk_fill_rate
on: disk.space
lookup: min -10m at -50m unaligned of avail
calc: ($this - $avail) / (($now - $after) / 3600)
every: 1m
units: GB/hour
info: average rate the disk fills up (positive), or frees up (negative) space, for the last hour
# calculate the hours remaining
# if the disk continues to fill
# in this rate
template: out_of_disk_space_time
on: disk.space
calc: $avail / $disk_fill_rate
units: hours
every: 10s
warn: $this > 0 and $this < (($status >= $WARNING) ? (48) : (8))
crit: $this > 0 and $this < (($status == $CRITICAL) ? (24) : (2))
delay: down 15m multiplier 1.2 max 1h
info: estimated time the disk will run out of space, if the system continues to add data with the rate of the last hour
to: sysadmin
# -----------------------------------------------------------------------------
# disk congestion
# raise an alarm if the disk is congested
# by calculating the average disk utilization
# for the last 10 minutes
template: 10min_disk_utilization
on: disk.util
lookup: average -10m unaligned
units: %
every: 1m
green: 90
red: 98
warn: $this > $green * (($status >= $WARNING) ? (0.7) : (1))
crit: $this > $red * (($status == $CRITICAL) ? (0.7) : (1))
delay: down 15m multiplier 1.2 max 1h
info: the percentage of time the disk was busy, during the last 10 minutes
to: sysadmin
# raise an alarm if the disk backlog
# is above 1000ms (1s) per second
# for 10 minutes
# (i.e. the disk cannot catch up)
template: 10min_disk_backlog
on: disk.backlog
lookup: average -10m unaligned
units: ms
every: 1m
green: 2000
red: 5000
warn: $this > $green * (($status >= $WARNING) ? (0.7) : (1))
crit: $this > $red * (($status == $CRITICAL) ? (0.7) : (1))
delay: down 15m multiplier 1.2 max 1h
info: average of the kernel estimated disk backlog, for the last 10 minutes
to: sysadmin
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