X-Git-Url: https://git.adam-barratt.org.uk/?a=blobdiff_plain;f=dsa-nagios-checks%2Fchecks%2Fdsa-check-running-kernel;h=df783976a29430921f2e6dd350108f3625a3f164;hb=3ecc03749909583afb63d28a6ddffbf0117b0700;hp=818288f273d3aa1e586e688bf6a26342ce954e28;hpb=42e99da9d896a33803e763c746e9a103183b6b34;p=mirror%2Fdsa-nagios.git

diff --git a/dsa-nagios-checks/checks/dsa-check-running-kernel b/dsa-nagios-checks/checks/dsa-check-running-kernel
index 818288f..df78397 100755
--- a/dsa-nagios-checks/checks/dsa-check-running-kernel
+++ b/dsa-nagios-checks/checks/dsa-check-running-kernel
@@ -3,7 +3,8 @@
 # Check if the running kernel has the same version string as the on-disk
 # kernel image.
 
-# Copyright 2008 Peter Palfrader
+# Copyright 2008,2009 Peter Palfrader
+# Copyright 2009 Stephen Gran
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the
@@ -43,6 +44,79 @@ get_offset() {
 		print $i,"\n"' < "$file"
 }
 
+get_avail() {
+	# This is wrong, but leaves room for when we have to care for machines running
+	# myfirstunix-image-0.1-dsa-arm
+	local prefix=linux
+
+	local kervers=$(uname -r)
+
+	local metavers=''
+
+	# DSA uses kernel versions of the form 2.6.29.3-dsa-dl380-oldxeon, where
+	# Debian uses versions of the form 2.6.29-2-amd64
+	if [ "${kervers//dsa}" != "$kervers" ]; then
+		metavers=$(echo $kervers | sed -r -e 's/^2\.(4|6)\.[0-9]+([\.0-9]+?)-(.*)/2.\1-\3/')
+	else
+		metavers=$(echo $kervers | sed -r -e 's/^2\.(4|6)\.[0-9]+-[A-Za-z0-9\.]+-(.*)/2.\1-\2/')
+	fi
+
+	# Attempt to track back to a metapackage failed.  bail
+	if [ "$metavers" = "$kervers" ]; then
+		return 2
+	fi
+
+	# We're just going to give up if we can't find a matching metapackage
+	# I tried being strict once, and it just caused a lot of headaches.  We'll see how
+	# being lax does for us
+
+	local output=$(apt-cache policy ${prefix}-image-${metavers} 2>/dev/null)
+	local metaavailvers=$(echo "$output" | grep '^  Candidate:' | awk '{print $2}')
+	local metainstavers=$(echo "$output" | grep '^  Installed:' | awk '{print $2}')
+
+	if [ -z "$metaavailvers" ] || [ "$metaavailvers" = '(none)' ]; then
+		return 2
+	fi
+	if [ -z "$metainstavers" ] || [ "$metainstavers" = '(none)' ]; then
+		return 2
+	fi
+
+	if [ "$metaavailvers" != "$metainstavers" ] ; then
+		echo "${prefix}-image-${metavers} $metaavailvers available but $metainstavers installed"
+		return 1
+	fi
+
+	local imagename=0
+	# --no-all-versions show shows only the candidate
+	for vers in $(apt-cache --no-all-versions show ${prefix}-image-${metavers} | egrep '^Depends:' | awk '{print $2}' | sort -u); do
+		if dpkg --compare-versions $vers gt $imagename; then
+			imagename=$vers
+		fi
+	done
+
+	if [ -z "$imagename" ] || [ "$imagename" = 0 ]; then
+		return 2
+	fi
+
+	if [ "$imagename" != "${prefix}-image-${kervers}" ]; then
+		if dpkg --compare-versions "$imagename" lt "${prefix}-image-${kervers}"; then
+			return 2
+		fi
+		echo "$imagename" != "${prefix}-image-${kervers}"
+		return 1
+	fi
+
+	local availvrs=$(apt-cache policy ${imagename} 2>/dev/null | grep '^  Candidate' | awk '{print $2}')
+	local kernelversion=$(apt-cache policy ${prefix}-image-${kervers} 2>/dev/null | grep '^  Installed:' | awk '{print $2}')
+
+	if [ "$availvrs" = "$kernelversion" ]; then
+		return 0
+	fi
+
+	echo "$kernelversion != $availvrs"
+	return 1
+}
+
 get_image() {
 	local image GZHDR1 GZHDR2 off
 
@@ -101,7 +175,13 @@ fi
 if [ "$running_version" != "$on_disk_version" ]; then
 	echo "WARNING: Running kernel does not match on-disk kernel image: [$running_version != $on_disk_version]"
 	exit $WARNING
-else
-	echo "OK: Running kernel matches on disk image: [$running_version]"
-	exit $OK
 fi
+
+ret="$(get_avail)"
+if [ $? = 1 ]; then
+	echo "WARNING: Kernel needs upgrade [$ret]"
+	exit $WARNING
+fi
+
+echo "OK: Running kernel matches on disk image: [$running_version]"
+exit $OK