1 files changed, 161 insertions, 0 deletions
diff --git a/src/health/health.d/disks.conf b/src/health/health.d/disks.conf
new file mode 100644
index 000000000..fe96837fb
--- /dev/null
+++ b/src/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
+ host labels: _os=linux freebsd
+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
+ host labels: _os=linux freebsd
+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 ${label:mount_point}
+          to: sysadmin
+
+
+# -----------------------------------------------------------------------------
+# disk fill rate
+
+# calculate the rate the disk fills
+# use as base, the available space change
+# during the last hour
+
+# this is just a calculation - it has no alarm
+# we will use it in the next template to find
+# the hours remaining
+
+   template: disk_fill_rate
+         on: disk.space
+host labels: _os=linux freebsd
+     lookup: min -10m at -50m unaligned of avail
+       calc: ($this - $avail) / (($now - $after) / 3600)
+      every: 1m
+      units: GB/hour
+       info: average rate the disk fills up (positive), or frees up (negative) space, for the last hour
+
+# calculate the hours remaining
+# if the disk continues to fill in this rate
+
+   template: out_of_disk_space_time
+         on: disk.space
+host labels: _os=linux freebsd
+       calc: ($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 ${label:mount_point} will run out of space, if the system continues to add data with the rate of the last hour
+         to: silent
+
+
+# -----------------------------------------------------------------------------
+# disk inode fill rate
+
+# calculate the rate the disk inodes are allocated
+# use as base, the available inodes change
+# during the last hour
+
+# this is just a calculation - it has no alarm
+# we will use it in the next template to find
+# the hours remaining
+
+   template: disk_inode_rate
+         on: disk.inodes
+host labels: _os=linux freebsd
+     lookup: min -10m at -50m unaligned of avail
+       calc: ($this - $avail) / (($now - $after) / 3600)
+      every: 1m
+      units: inodes/hour
+       info: average rate at which disk inodes are allocated (positive), or freed (negative), for the last hour
+
+# calculate the hours remaining
+# if the disk inodes are allocated
+# in this rate
+
+   template: out_of_disk_inodes_time
+         on: disk.inodes
+host labels: _os=linux freebsd
+       calc: ($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
+host labels: _os=linux freebsd
+     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
+host labels: _os=linux freebsd
+     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