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# -----------------------------------------------------------------------------
# low disk space
# checking the latest collected values
# raise an alarm if the disk is low on
# available disk space
template: disk_full_percent
on: disk.space
calc: $used * 100 / ($avail + $used)
every: 1m
warn: $this > 80
crit: $this > 95
units: %
info: current disk space usage
# -----------------------------------------------------------------------------
# disk fill rate
# calculate the rate the disk fills
# use as base, the available space change
# during the last 30 minutes
# this is just a calculation - it has no alarm
# we will use it in the next template to find
# the hours remaining
template: disk_fill_rate
on: disk.space
lookup: max -1s at -30m unaligned of avail
calc: ($this - $avail) / ($now - $after)
every: 15s
units: MB/s
info: average rate the disk fills up (positive), or frees up (negative) space, for the last 30 minutes
# calculate the hours remaining
# if the disk continues to fill
# in this rate
template: disk_full_after_hours
on: disk.space
calc: $avail / $disk_fill_rate / 3600
every: 10s
warn: $this > 0 and $this < 48
crit: $this > 0 and $this < 24
units: hours
info: estimated time the disk will run out of space, if the system continues to add data with the rate of the last 30 minutes
# -----------------------------------------------------------------------------
# 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
every: 1m
green: 90
red: 98
warn: $this > $green
crit: $this > $red
units: %
info: the percentage of time the disk was busy, during the last 10 minutes
# 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
every: 1m
green: 1000
red: 2000
warn: $this > $green
crit: $this > $red
units: ms
info: average of the kernel estimated disk backlog, for the last 10 minutes
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