add some rra checks for nagios to our checks

[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 3e35e10..452c8c1 100755 (executable)
--- a/dsa-nagios-checks/checks/dsa-check-running-kernel
+++ b/dsa-nagios-checks/checks/dsa-check-running-kernel
@@ -3,8 +3,9 @@
 # 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
+# Copyright 2010 Uli Martens
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the
@@ -44,7 +45,7 @@ get_offset() {
                print $i,"\n"' < "$file"
 }
 
-get_avail() {
+get_avail_linux() {
        # This is wrong, but leaves room for when we have to care for machines running
        # myfirstunix-image-0.1-dsa-arm
        local prefix=linux
@@ -81,8 +82,14 @@ get_avail() {
                return 2
        fi
 
+       if [ "$metaavailvers" != "$metainstavers" ] ; then
+               echo "${prefix}-image-${metavers} $metaavailvers available but $metainstavers installed"
+               return 1
+       fi
+
        local imagename=0
-       for vers in $(apt-cache --no-all-versions depends ${prefix}-image-${metavers} | grep Depends | awk '{print $2}' | sort -u); do
+       # --no-all-versions show shows only the candidate
+       for vers in $(apt-cache --no-all-versions show ${prefix}-image-${metavers} | sed -n 's/^Depends: //p' | tr ',' '\n' | tr -d ' ' | grep ${prefix}-image | awk '{print $1}' | sort -u); do
                if dpkg --compare-versions $vers gt $imagename; then
                        imagename=$vers
                fi
@@ -111,13 +118,14 @@ get_avail() {
        return 1
 }
 
-get_image() {
-       local image GZHDR1 GZHDR2 off
+get_image_linux() {
+       local image GZHDR1 GZHDR2 LZHDR off
 
        image="$1"
 
        GZHDR1="\x1f\x8b\x08\x00"
        GZHDR2="\x1f\x8b\x08\x08"
+       LZHDR="\x00\x00\x00\x02\xff"
 
        off=`get_offset "$image" $GZHDR1`
        [ "$?" != "0" ] && off="-1"
@@ -133,6 +141,13 @@ get_image() {
                return
        fi
 
+       off=`get_offset "$image" $LZHDR`
+       [ "$?" != "0" ] && off="-1"
+       if [ "$off" -ne "-1" ]; then
+               (dd ibs="$[off-1]" skip=1 count=0 && dd bs=512k) < "$image" 2>/dev/null | lzcat 2>/dev/null
+               return
+       fi
+
        echo "ERROR: Unable to extract kernel image." 2>&1
        exit 1
 }
@@ -140,16 +155,25 @@ get_image() {
 searched=""
 for on_disk in \
        "/boot/vmlinuz-`uname -r`"\
-       "/boot/vmlinux-`uname -r`"; do
+       "/boot/vmlinux-`uname -r`"\
+       "/boot/kfreebsd-`uname -r`.gz"; do
 
        if [ -e "$on_disk" ]; then
-               on_disk_version="`get_image "$on_disk" | strings | grep 'Linux version' | head -n1`"
-               [ -z "$on_disk_version" ] || break
-               on_disk_version="`cat "$on_disk" | strings | grep 'Linux version' | head -n1`"
-               [ -z "$on_disk_version" ] || break
-
-               echo "UNKNOWN: Failed to get a version string from image $on_disk"
-               exit $UNKNOWN
+               if [ ! -x "$(which strings)" ]; then
+                       echo "UNKNOWN: 'strings' command missing, perhaps install binutils?"
+                       exit $UNKNOWN
+               fi
+               if [ "${on_disk/vmlinu}" != "$on_disk" ]; then
+                       on_disk_version="`get_image_linux "$on_disk" | strings | grep 'Linux version' | head -n1`"
+                       [ -z "$on_disk_version" ] || break
+                       on_disk_version="`cat "$on_disk" | strings | grep 'Linux version' | head -n1`"
+                       [ -z "$on_disk_version" ] || break
+
+                       echo "UNKNOWN: Failed to get a version string from image $on_disk"
+                       exit $UNKNOWN
+               else
+                       on_disk_version="$(zcat $on_disk | strings | grep Debian | head -n 1 | sed -e 's/Debian [[:alnum:]]\+ (\(.*\))/\1/')"
+               fi
        fi
        searched="$searched $on_disk"
 done
@@ -159,22 +183,26 @@ if ! [ -e "$on_disk" ]; then
        exit $WARNING
 fi
 
+if [ "$(uname -s)" = "Linux" ]; then
+       running_version="`cat /proc/version`"
+       if [ -z "$running_version" ] ; then
+               echo "UNKNOWN: Failed to get a version string from running system"
+               exit $UNKNOWN
+       fi
 
-running_version="`cat /proc/version`"
-if [ -z "$running_version" ] ; then
-       echo "UNKNOWN: Failed to get a version string from running system"
-       exit $UNKNOWN
-fi
-
-if [ "$running_version" != "$on_disk_version" ]; then
-       echo "WARNING: Running kernel does not match on-disk kernel image: [$running_version != $on_disk_version]"
-       exit $WARNING
-fi
+       if [ "$running_version" != "$on_disk_version" ]; then
+               echo "WARNING: Running kernel does not match on-disk kernel image: [$running_version != $on_disk_version]"
+               exit $WARNING
+       fi
 
-ret="$(get_avail)"
-if [ $? = 1 ]; then
-       echo "WARNING: Kernel needs upgrade [$ret]"
-       exit $WARNING
+       ret="$(get_avail_linux)"
+       if [ $? = 1 ]; then
+               echo "WARNING: Kernel needs upgrade [$ret]"
+               exit $WARNING
+       fi
+else
+       echo "No support for FreeBSD yet"
+       exit $OK
 fi
 
 echo "OK: Running kernel matches on disk image: [$running_version]"