From ebce8bc85f6d777bd50dbf72b4b016af94549491 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gardais=20J=C3=A9r=C3=A9my?=
 <jeremy.gardais@univ-rennes1.fr>
Date: Fri, 22 Jun 2018 16:04:32 +0200
Subject: [PATCH] Add a ZFS plugin (both config file and script)

In order to check ZFS pool health.
---
 CHANGELOG.md                                  |   1 +
 README.md                                     |   6 +
 defaults/main.yml                             |  10 +-
 tasks/main.yml                                |  21 +++
 templates/etc/xymon/clientlaunch.d/zfs.cfg.j2 |   6 +
 templates/usr/lib/xymon/client/ext/zfs.j2     | 123 ++++++++++++++++++
 6 files changed, 165 insertions(+), 2 deletions(-)
 create mode 100644 templates/etc/xymon/clientlaunch.d/zfs.cfg.j2
 create mode 100755 templates/usr/lib/xymon/client/ext/zfs.j2

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0366744..8a0e723 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@
 * Ensure to apply the config only if wanted.
 * Some yamllint fix.
 * Add a all hosts variable for the plugin "list" whitelist.
+* Add a ZFS plugin (both config file and script).
 
 ## v1.1
 
diff --git a/README.md b/README.md
index 7296df6..6f27b4e 100644
--- a/README.md
+++ b/README.md
@@ -43,6 +43,11 @@ Manage Xymon (client) installation and configuration.
 * **xymon_plug_libs_whitelist** : All hosts whitelist of processes that should not be monitored with `libs` plugin.
 * **xymon_plug_libs_group_whitelist** : Group whitelist of processes that should not be monitored with `libs` plugin.
 * **xymon_plug_libs_host_whitelist** : Host whitelist of processes that should not be monitored with `libs` plugin.
+* **xymon_cli__plug_zfs_state** : The state of plugin `zfs` [default : `false`].
+* **xymon_cli__plug_zfs_script_path** : Path to the ZFS script [default : `/usr/lib/xymon/client/ext/zfs`].
+* **xymon_cli__plug_zfs_script_tpl** : Template used to generate the previous script [default : `usr/lib/xymon/client/ext/zfs.j2`].
+* **xymon_cli__plug_zfs_path** : Configuration file for the `zfs` plugin [default : `/etc/xymon/clientlaunch.d/zfs.cfg`].
+* **xymon_cli__plug_zfs_tpl** : Template used to generate the previous config file [default : `etc/xymon/clientlaunch.d/zfs.cfg.j2`].
 
 ### OS Specific Variables
 
@@ -73,6 +78,7 @@ Some plugins and options can be managed with this role :
 * apt : Check state of packages and repositories.
 * libs : Check for running processes with upgraded libraries.
 * mq : Check mail queue.
+* zfs : Check ZFS pools status.
 
 ## Development
 
diff --git a/defaults/main.yml b/defaults/main.yml
index de0156d..2e75f22 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -46,7 +46,6 @@ xymon_srv_list: "monitoring.{{ ansible_domain }}"
 # Plugins management [[[
 # ----------------------
 
-# plugins [[[
 xymon_plug_manage: true
 
 ## Plugin apt [[[
@@ -80,7 +79,14 @@ xymon_plug_libs_whitelist: {}
 xymon_plug_libs_group_whitelist: {}
 xymon_plug_libs_host_whitelist: {}
 
-## ]]]
+                                                                   # ]]]
+## Plugin zfs [[[
+xymon_cli__plug_zfs_state: false
+xymon_cli__plug_zfs_script_path: '/usr/lib/xymon/client/ext/zfs'
+xymon_cli__plug_zfs_script_tpl: 'usr/lib/xymon/client/ext/zfs.j2'
+xymon_cli__plug_zfs_path: '/etc/xymon/clientlaunch.d/zfs.cfg'
+xymon_cli__plug_zfs_tpl: 'etc/xymon/clientlaunch.d/zfs.cfg.j2'
+
                                                                    # ]]]
 
 # ]]]
diff --git a/tasks/main.yml b/tasks/main.yml
index d6ce260..adf58c5 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -125,3 +125,24 @@
          xymon_plug_manage|bool)
   notify: restart xymon-client service
 
+# Manage zfs plugin [[[1
+- name: PLUGIN zfs config file
+  template:
+    src: '{{ xymon_cli__plug_zfs_tpl }}'
+    dest: '{{ xymon_cli__plug_zfs_path }}'
+    owner: root
+    group: root
+    mode: 0644
+  when: (xymon_cli_manage|bool and
+         xymon_plug_manage|bool)
+  notify: restart xymon-client service
+
+- name: PLUGIN zfs script file
+  template:
+    src: '{{ xymon_cli__plug_zfs_script_tpl }}'
+    dest: '{{ xymon_cli__plug_zfs_script_path }}'
+    owner: root
+    group: xymon
+    mode: 0755
+  when: (xymon_cli_manage|bool and
+         xymon_plug_manage|bool)
diff --git a/templates/etc/xymon/clientlaunch.d/zfs.cfg.j2 b/templates/etc/xymon/clientlaunch.d/zfs.cfg.j2
new file mode 100644
index 0000000..c4e5e29
--- /dev/null
+++ b/templates/etc/xymon/clientlaunch.d/zfs.cfg.j2
@@ -0,0 +1,6 @@
+[zfs]
+	{{ '#DISABLED' if xymon_cli__plug_zfs_state else 'DISABLED' }}
+	ENVFILE /etc/xymon/xymonclient.cfg
+	CMD /usr/bin/sudo -E -u root $XYMONCLIENTHOME/ext/zfs
+	LOGFILE /var/log/xymon/zfs.log
+	INTERVAL 5m
diff --git a/templates/usr/lib/xymon/client/ext/zfs.j2 b/templates/usr/lib/xymon/client/ext/zfs.j2
new file mode 100755
index 0000000..308fc28
--- /dev/null
+++ b/templates/usr/lib/xymon/client/ext/zfs.j2
@@ -0,0 +1,123 @@
+#!/bin/ksh
+# Revision History:
+# 1. Mike Rowell <Mike.Rowell@Rightmove.co.uk>, original
+# 2. Uwe Kirbach <U.Kirbach@EnBW.com>
+# 3. T.J. Yang: add in some comments.
+# 4. Vernon Everett <everett.vernon@gmail.com : Added check for old snapshots
+#                                             : Added graphing data
+# 5. Pierre ROLLAND : Fixing column parsing when using the command zpool list -H
+
+DISKYELL=80
+DISKRED=90
+SNAPRED=90  # Days old
+SNAPYELL=60 # Days old
+SNAPCOL=true  # Set to true if snapshot age should effect test colour
+CHECKSNAPS=true # Set to true to do snapshot checking
+TEST="zfs"
+DISPCOLOR="green"
+FIRST_LINE="zfs - okay"
+FIRST_LINE_HEALTH="okay"
+FIRST_LINE_CAP="okay"
+DATA=""
+
+#What: beautify the page display by html code.
+STRING="<table border=1 cellpadding=10><tr><th></th><th>Zpool Name</th><th>Status</th><th>Capacity</th></tr>"
+#What: a loop to parse output of "zpool list -H" output.
+# bash-3.00# zpool list
+# NAME                    SIZE    USED   AVAIL    CAP  HEALTH     ALTROOT
+# mypool                 33.8G   84.5K   33.7G     0%  ONLINE     -
+# bash-3.00# zpool list -H
+# mypool  33.8G   84.5K   33.7G   0%      ONLINE  -
+# bash-3.00#
+
+if [ ! -f /sbin/zpool ]; then
+  exit 0
+fi
+
+#/sbin/zpool list -H | while read name size used avail cap health altroot
+/sbin/zpool list -H | while read name size used avail expandsz frag cap dedup health altroot
+do
+  LINE_COLOR="green"
+
+  if [ "${health}" == "ONLINE" ]; then
+    HEALTH_COLOR="green"
+  elif [ "${health}" == "DEGRADED" ]; then
+    HEALTH_COLOR="yellow"
+  elif [ "${health}" == "FAULTED" ]; then
+    HEALTH_COLOR="red"
+  fi
+
+  CAP_COLOR="green"
+  cap=`echo ${cap} | cut -d% -f1`
+  if [ "${cap}" -ge $DISKYELL ]; then
+    CAP_COLOR="yellow"
+  elif [ "${cap}" -gt $DISKRED ]; then
+    CAP_COLOR="red"
+  fi
+  DATA=$(echo "$name : $cap\n$DATA")
+
+# Determine the line colours
+  [ "$HEALTH_COLOR" == "yellow" -o "$CAP_COLOR" == "yellow" ] && LINE_COLOR="yellow"
+  [ "$HEALTH_COLOR" == "red" -o "$CAP_COLOR" == "red" ] && LINE_COLOR="red"
+
+# Determine the messages
+  [ "$HEALTH_COLOR" == "yellow" -a "$FIRST_LINE_HEALTH" != "faulted" ] && FIRST_LINE_HEALTH="degraded"
+  [ "$HEALTH_COLOR" == "red" ] && FIRST_LINE_HEALTH="faulted"
+  [ "$CAP_COLOR" == "yellow" -a "$FIRST_LINE_CAP" != "full" ] && FIRST_LINE_CAP="nearly full"
+  [ "$CAP_COLOR" = "yellow" ] && FIRST_LINE_CAP="full"
+
+#Determine the final colour status
+  [ "$LINE_COLOR" == "yellow" -a "$DISPCOLOR" != "red" ] && DISPCOLOR="yellow"
+  [ "$LINE_COLOR" == "red" ] && DISPCOLOR="red"
+
+  STRING="$STRING <tr><td>&${LINE_COLOR}</td><td>${name}</td><td>${health}</td><td>${cap} %</td></tr>"
+done
+DATA=$(echo "$DATA \n\n")
+
+STRING="$STRING </table><br><br>"
+STRING="$STRING`/sbin/zpool status -xv`"
+FIRST_LINE="zfs - health: $FIRST_LINE_HEALTH - capacity: $FIRST_LINE_CAP"
+
+# Snapshot check
+if [ "$CHECKSNAPS" = "true" ]
+then
+   NOW=$(perl -e 'print time(), "\n" ')
+   SNAPLIST=$(zfs list | grep @ |awk '{ print $1 }' \
+                       | while read a
+                         do
+                            echo "$(zfs get -H -o name,value -p creation $a) $( zfs get -H -o value used $a)"
+                         done)
+   if [ -z "$SNAPLIST" ]
+   then
+      SNAPTABLE="<br>&green No snapshots found"
+   else
+      SNAPTABLE="<table border=1 cellpadding=10><tr><th></th><th>Snapshot</th><th>Age</th><th>Size</th></tr>"
+      echo "$SNAPLIST" | while read SNAPSHOT CREATION SIZE
+      do
+         LINE_COLOR=green
+         ((SNAPREDS=SNAPRED*43200))
+         ((SNAPYELLS=SNAPYELL*43200))
+         ((AGES=NOW-CREATION)) # AGES=Age in seconds
+         [ $AGES -gt $SNAPYELLS ] && LINE_COLOR=yellow
+         [ $AGES -gt $SNAPREDS ] && LINE_COLOR=red
+         [ $AGES -gt 120 ] && ((AGE=AGES/60))&& AGE="$AGE Minutes"
+         [ $AGES -gt 7200 ] && ((AGE=AGES/3600)) && AGE="$AGE Hours"
+         [ $AGES -gt 172800 ] && ((AGE=AGES/86400)) && AGE="$AGE Days"
+         SNAPTABLE="$SNAPTABLE <tr><td>&${LINE_COLOR}</td><td>${SNAPSHOT}</td><td>${AGE}</td><td>${SIZE}</td></tr>"
+         if [ "$SNAPCOL" = "true" ] #Only if true will it effect test colour
+         then
+            if [ "$DISPCOLOR" != "red" ] # If it's already red, it's not getting any worse
+            then
+               [ "$LINE_COLOR" != "green" ] && DISPCOLOR=$LINE_COLOR
+            fi
+         fi
+      done
+      SNAPTABLE="$SNAPTABLE </table><br><br>"
+   fi
+   STRING="$STRING <br><br><B>SNAPSHOT STATUS</B> $SNAPTABLE"
+fi
+# What: Sent out the final bb message to hobbit server.
+$XYMON $XYMONSRV $XYMONSERVERS "status $MACHINE.$TEST $DISPCOLOR `date` $FIRST_LINE $STRING"
+echo "$XYMON $XYMONSRV $XYMONSERVERS --debug status $MACHINE.$TEST $DISPCOLOR `date` $FIRST_LINE $STRING" > /tmp/xymon_zfs
+$XYMON $XYMONSRV $XYMONSERVERS "data $MACHINE.$TEST $DISPCOLOR $(echo; echo "$DATA" ;echo;echo)"
+