1 files changed, 172 insertions, 0 deletions
diff --git a/health/health.d/disks.conf b/health/health.d/disks.conf
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+
+# you can disable an alarm notification by setting the 'to' line to: silent
+
+
+# -----------------------------------------------------------------------------
+# 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
+    class: Utilization
+     type: System
+component: Disk
+       os: linux freebsd
+    hosts: *
+chart labels: mount_point=!/dev !/dev/* !/run !/run/* *
+     calc: $used * 100 / ($avail + $used)
+    units: %
+    every: 1m
+     warn: $this > (($status >= $WARNING ) ? (80) : (90))
+     crit: ($this > (($status == $CRITICAL) ? (90) : (98))) && $avail < 5
+    delay: up 1m down 15m multiplier 1.5 max 1h
+  summary: Disk ${label:mount_point} space usage
+     info: Total space utilization of disk ${label:mount_point}
+       to: sysadmin
+
+ template: disk_inode_usage
+       on: disk.inodes
+    class: Utilization
+     type: System
+component: Disk
+       os: linux freebsd
+    hosts: *
+chart labels: mount_point=!/dev !/dev/* !/run !/run/* *
+     calc: $used * 100 / ($avail + $used)
+    units: %
+    every: 1m
+     warn: $this > (($status >= $WARNING)  ? (80) : (90))
+     crit: $this > (($status == $CRITICAL) ? (90) : (98))
+    delay: up 1m down 15m multiplier 1.5 max 1h
+  summary: Disk ${label:mount_point} inode usage
+     info: Total inode utilization of disk ${label:mount_point}
+       to: sysadmin
+
+
+# -----------------------------------------------------------------------------
+# disk fill rate
+
+# calculate the rate the disk fills
+# use as base, the available space change
+# during the last hour
+
+# this is just a calculation - it has no alarm
+# we will use it in the next template to find
+# the hours remaining
+
+template: disk_fill_rate
+      on: disk.space
+      os: linux freebsd
+   hosts: *
+  lookup: min -10m at -50m unaligned of avail
+    calc: ($this - $avail) / (($now - $after) / 3600)
+   every: 1m
+   units: GB/hour
+    info: average rate the disk fills up (positive), or frees up (negative) space, for the last hour
+
+# calculate the hours remaining
+# if the disk continues to fill
+# in this rate
+
+template: out_of_disk_space_time
+      on: disk.space
+      os: linux freebsd
+   hosts: *
+    calc: ($disk_fill_rate > 0) ? ($avail / $disk_fill_rate) : (inf)
+   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
+ summary: Disk ${label:mount_point} estimation of lack of space
+    info: Estimated time the disk ${label:mount_point} will run out of space, if the system continues to add data with the rate of the last hour
+      to: silent
+
+
+# -----------------------------------------------------------------------------
+# disk inode fill rate
+
+# calculate the rate the disk inodes are allocated
+# use as base, the available inodes change
+# during the last hour
+
+# this is just a calculation - it has no alarm
+# we will use it in the next template to find
+# the hours remaining
+
+template: disk_inode_rate
+      on: disk.inodes
+      os: linux freebsd
+   hosts: *
+  lookup: min -10m at -50m unaligned of avail
+    calc: ($this - $avail) / (($now - $after) / 3600)
+   every: 1m
+   units: inodes/hour
+    info: average rate at which disk inodes are allocated (positive), or freed (negative), for the last hour
+
+# calculate the hours remaining
+# if the disk inodes are allocated
+# in this rate
+
+template: out_of_disk_inodes_time
+      on: disk.inodes
+      os: linux freebsd
+   hosts: *
+    calc: ($disk_inode_rate > 0) ? ($avail / $disk_inode_rate) : (inf)
+   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
+ summary: Disk ${label:mount_point} estimation of lack of inodes
+    info: Estimated time the disk ${label:mount_point} will run out of inodes, if the system continues to allocate inodes with the rate of the last hour
+      to: silent
+
+
+# -----------------------------------------------------------------------------
+# 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
+    class: Utilization
+     type: System
+component: Disk
+       os: linux freebsd
+    hosts: *
+   lookup: average -10m unaligned
+    units: %
+    every: 1m
+     warn: $this > 98 * (($status >= $WARNING)  ? (0.7) : (1))
+    delay: down 15m multiplier 1.2 max 1h
+  summary: Disk ${label:device} utilization
+     info: Average percentage of time ${label:device} disk was busy over the last 10 minutes
+       to: silent
+
+
+# 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
+    class: Latency
+     type: System
+component: Disk
+       os: linux
+    hosts: *
+   lookup: average -10m unaligned
+    units: ms
+    every: 1m
+     warn: $this > 5000 * (($status >= $WARNING)  ? (0.7) : (1))
+    delay: down 15m multiplier 1.2 max 1h
+  summary: Disk ${label:device} backlog
+     info: Average backlog size of the ${label:device} disk over the last 10 minutes
+       to: silent