skip absent temperature readings

[mirror/dsa-nagios.git] / dsa-nagios-checks / checks / dsa-check-running-kernel

diff --git a/dsa-nagios-checks/checks/dsa-check-running-kernel b/dsa-nagios-checks/checks/dsa-check-running-kernel
index 818288f..df78397 100755 (executable)
--- 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