From ee96db07d570fb8820cd7ac7dd654f680b1332a2 Mon Sep 17 00:00:00 2001
From: Ronnie Sahlberg <ronniesahlberg@gmail.com>
Date: Thu, 11 Aug 2011 10:00:53 +1000
Subject: [PATCH] Add new eventscript 40.fs_use that can be used to monitor
 file system use and flag a node unhealthy when they become full

(This used to be ctdb commit 2fd1babf8135ad5d53f3b25ba823d840ebc66460)
---
 ctdb/Makefile.in                |  1 +
 ctdb/config/events.d/40.fs_use  | 53 +++++++++++++++++++++++++++++++++
 ctdb/packaging/RPM/ctdb.spec.in |  1 +
 3 files changed, 55 insertions(+)
 create mode 100644 ctdb/config/events.d/40.fs_use

diff --git a/ctdb/Makefile.in b/ctdb/Makefile.in
index d53d3db5e0d..0cce22e0d7a 100755
--- a/ctdb/Makefile.in
+++ b/ctdb/Makefile.in
@@ -258,6 +258,7 @@ install: all
 	${INSTALLCMD} -m 644 config/events.d/20.multipathd $(DESTDIR)$(etcdir)/ctdb/events.d
 	${INSTALLCMD} -m 644 config/events.d/31.clamd $(DESTDIR)$(etcdir)/ctdb/events.d
 	${INSTALLCMD} -m 755 config/events.d/40.vsftpd $(DESTDIR)$(etcdir)/ctdb/events.d
+	${INSTALLCMD} -m 644 config/events.d/40.fs_use $(DESTDIR)$(etcdir)/ctdb/events.d
 	${INSTALLCMD} -m 755 config/events.d/41.httpd $(DESTDIR)$(etcdir)/ctdb/events.d
 	${INSTALLCMD} -m 755 config/events.d/50.samba $(DESTDIR)$(etcdir)/ctdb/events.d
 	${INSTALLCMD} -m 755 config/events.d/60.nfs $(DESTDIR)$(etcdir)/ctdb/events.d
diff --git a/ctdb/config/events.d/40.fs_use b/ctdb/config/events.d/40.fs_use
new file mode 100644
index 00000000000..14d33fae745
--- /dev/null
+++ b/ctdb/config/events.d/40.fs_use
@@ -0,0 +1,53 @@
+#!/bin/sh
+# ctdb event script for checking local file system utilization
+
+. $CTDB_BASE/functions
+loadconfig
+
+case "$1" in 
+    monitor)
+        # check each specified fs to be checked
+        # config format is <fs_mount>:<fs_threshold>
+        for fs in $CTDB_CHECK_FS_USE
+        do
+            # parse fs_mount and fs_threshold
+            fs_config=(`echo $fs | tr ':' '\n'`)
+            fs_mount=${fs_config[0])}
+            fs_threshold=${fs_config[1])}
+
+            # check if given fs_mount is existing directory
+            if [ ! -d "$fs_mount" ]; then
+                echo "$0: Directory $fs_mount does not exist"
+                exit 1
+            fi
+
+            # check if given fs_threshold is number
+            if ! [[ "$fs_threshold" =~ ^[0-9]+$ ]] ; then
+                echo "$0: Threshold $fs_threshold is invalid number"
+                exit 1
+            fi
+
+            # get utilization of given fs from df
+            fs_usage=`df -k $fs_mount | grep % | awk {'print $5'} | sed 's/%//g' | tail -n 1`
+
+            # check if fs_usage is number
+            if ! [[ "$fs_usage" =~ ^[0-9]+$ ]] ; then
+                echo "$0: FS utilization $fs_usage is invalid number"
+                exit 1
+            fi
+
+            # check if fs_usage is higher than or equal to fs_threshold
+            if [[ "$fs_usage" -ge "$fs_threshold" ]] ; then
+                echo "ERROR: Utilization of $fs_mount ($fs_usage%) is higher than threshold ($fs_threshold%)"
+                exit 1
+            fi
+        done
+
+	;;
+
+    *)
+	ctdb_standard_event_handler "$@"
+	;;
+esac
+
+exit 0
diff --git a/ctdb/packaging/RPM/ctdb.spec.in b/ctdb/packaging/RPM/ctdb.spec.in
index c006b51836a..f618e76013f 100644
--- a/ctdb/packaging/RPM/ctdb.spec.in
+++ b/ctdb/packaging/RPM/ctdb.spec.in
@@ -102,6 +102,7 @@ rm -rf $RPM_BUILD_ROOT
 %{_sysconfdir}/ctdb/events.d/11.routing
 %{_sysconfdir}/ctdb/events.d/20.multipathd
 %{_sysconfdir}/ctdb/events.d/31.clamd
+%{_sysconfdir}/ctdb/events.d/40.fs_use
 %{_sysconfdir}/ctdb/events.d/40.vsftpd
 %{_sysconfdir}/ctdb/events.d/41.httpd
 %{_sysconfdir}/ctdb/events.d/50.samba