# -----------------------------------------------------------------------------
# low disk space

# checking the latest collected values
# raise an alarm if the disk is low on
# available disk space

template: low_disk_space
      on: disk.space
   every: 1m
    warn: $avail * 100 / ($avail + $used) > 80
    crit: $avail * 100 / ($avail + $used) > 90

# -----------------------------------------------------------------------------
# disk fill rate

# calculate the rate the disk fills
# use as base, the available space change
# during the last minute

template: disk_fill_rate_1m
      on: disk.space
  lookup: max -1s at -1m unaligned of avail
    calc: ($this - $avail) / (1 * 60)
   every: 1m
    warn: $this * 2 * 86400 > $avail
    crit: $this * 1 * 86400 > $avail

# calculate the rate the disk fills
# use as base, the available space change
# during the last hour
template: disk_fill_rate_59m
      on: disk.space
  lookup: max -1s at -59m unaligned of avail
   every: 1m
    calc: ($this - $avail) / (59 * 60)
    warn: $this * 2 * 86400 > $avail
    crit: $this * 1 * 86400 > $avail

# -----------------------------------------------------------------------------
# disk congestion

# raise an alarm if the disk is congested
# by calculating the average disk utilization
# for the last minute

template: disk_congested
      on: disk.util
  lookup: average -1m every 1m unaligned
   green: 70
     red: 95
    warn: $this > $green
    crit: $this > $red

# raise an alarm if the disk backlog
# is above 1000ms (1s) per second
# for 1 minute
# (i.e. the disk cannot catch up)

template: disk_not_catching_up
      on: disk.backlog
  lookup: average -1m every 1m unaligned
   green: 500
     red: 1000
    warn: $this > $green
    crit: $this > $red