add mdadm module

Template Module MDADM/README.md

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+## What is the purpose of this template:
+
+A simple template that detects and monitors software raids made with MDADM
+
+## How to setup:
+
+### On your servers :
+
+copy the `userparameter_mdadm.conf` file in the directory "/etc/zabbix/zabbix_agentd.d/" and restart your zabbix agent
+
+### On your Zabbix WebUI :
+
+In "Configurations" -> "Templates", clic on the "Import" button and load the `Template Module MDADM.yaml` file

Template Module MDADM/Template Module MDADM.yaml

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+zabbix_export:
+  version: '5.2'
+  date: '2021-04-13T21:34:53Z'
+  groups:
+    -
+      name: Templates
+    -
+      name: Templates/Modules
+  templates:
+    -
+      template: 'Template Module MDADM'
+      name: 'Template Module MDADM'
+      description: 'A simple template that detects and monitors software raids made with MDADM'
+      groups:
+        -
+          name: Templates
+        -
+          name: Templates/Modules
+      applications:
+        -
+          name: MD
+      discovery_rules:
+        -
+          name: 'MDADM MD devices discovery'
+          key: md.discovery
+          delay: 12h
+          filter:
+            conditions:
+              -
+                macro: '{#MDNAME}'
+                value: '.*'
+                formulaid: A
+          item_prototypes:
+            -
+              name: 'MD $1 degraded'
+              key: 'md.degraded[{#MDNAME}]'
+              delay: 5m
+              description: 'Get number of degraded disks'
+              applications:
+                -
+                  name: MD
+              preprocessing:
+                -
+                  type: DISCARD_UNCHANGED_HEARTBEAT
+                  parameters:
+                    - 1d
+            -
+              name: 'MD $1 raid disks'
+              key: 'md.raid_disks[{#MDNAME}]'
+              delay: 6h
+              description: 'Get number of all disks'
+              applications:
+                -
+                  name: MD
+              preprocessing:
+                -
+                  type: DISCARD_UNCHANGED_HEARTBEAT
+                  parameters:
+                    - 1d
+              trigger_prototypes:
+                -
+                  expression: '{diff()}>0'
+                  name: 'MD {#MDNAME} number of disks changed on {HOST.NAME}'
+                  priority: WARNING
+            -
+              name: 'MD $1 raid level'
+              key: 'md.raid_level[{#MDNAME}]'
+              delay: 24h
+              description: 'Get number of all disks'
+              applications:
+                -
+                  name: MD
+              preprocessing:
+                -
+                  type: DISCARD_UNCHANGED_HEARTBEAT
+                  parameters:
+                    - 2d
+              trigger_prototypes:
+                -
+                  expression: '{change()}=1'
+                  name: 'MD {#MDNAME} changed of level'
+                  priority: INFO
+            -
+              name: 'MD $1 sync action'
+              key: 'md.sync_action[{#MDNAME}]'
+              delay: 5m
+              history: 365d
+              trends: '0'
+              value_type: TEXT
+              description: 'Get current sync action'
+              applications:
+                -
+                  name: MD
+              preprocessing:
+                -
+                  type: DISCARD_UNCHANGED_HEARTBEAT
+                  parameters:
+                    - 1h
+              trigger_prototypes:
+                -
+                  expression: '{str(recover)}=1'
+                  name: 'MD {#MDNAME} in recovery mode on {HOST.NAME}'
+                  priority: INFO
+          trigger_prototypes:
+            -
+              expression: '{Template Module MDADM:md.degraded[{#MDNAME}].last()}>0 and {Template Module MDADM:md.raid_level[{#MDNAME}].last()}<>0'
+              name: 'MD {#MDNAME} is degraded on {HOST.NAME}'
+              priority: HIGH

Template Module MDADM/userparameter_mdadm.conf

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+UserParameter=md.discovery,ls /sys/class/block | awk 'BEGIN{printf "{\"data\":["}; /^md[0-9]+$/ {printf c"{\"{#MDNAME}\":\""$1"\"}";c=","}; END{print "]}"}'
+UserParameter=md.degraded[*],cat /sys/block/$1/md/degraded 2>/dev/null || echo 1
+UserParameter=md.sync_action[*],cat /sys/block/$1/md/sync_action
+UserParameter=md.raid_disks[*],cat /sys/block/$1/md/raid_disks
+UserParameter=md.raid_level[*],cat /sys/block/$1/md/level | sed 's/^raid//g'