X-Git-Url: https://git.adam-barratt.org.uk/?a=blobdiff_plain;f=dsa-nagios-checks%2Fchecks%2Fdsa-check-running-kernel;h=bb0fc9628f4c2480d1ea6032ede82220c168ab04;hb=e3108042c5f76acd268b02c59b52435591ede554;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..bb0fc96 100755 --- a/dsa-nagios-checks/checks/dsa-check-running-kernel +++ b/dsa-nagios-checks/checks/dsa-check-running-kernel @@ -3,7 +3,10 @@ # Check if the running kernel has the same version string as the on-disk # kernel image. -# Copyright 2008 Peter Palfrader +# Copyright 2008,2009,2011 Peter Palfrader +# Copyright 2009 Stephen Gran +# Copyright 2010 Uli Martens +# Copyright 2011 Alexander Reichle-Schmehl # # Permission is hereby granted, free of charge, to any person obtaining # a copy of this software and associated documentation files (the @@ -43,13 +46,87 @@ get_offset() { print $i,"\n"' < "$file" } -get_image() { - local image GZHDR1 GZHDR2 off +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="$1"; shift + + local kervers=$(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} | 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 + 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_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" @@ -65,23 +142,61 @@ 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 } + +freebsd_check_running_version() { + local imagefile="$1"; shift + + local r="$(uname -r)" + local v="$(uname -v| sed -e 's/^#[0-9]*/&:/')" + + local q='@\(#\)FreeBSD '"$r $v" + + if zcat "$imagefile" | strings | egrep -q "$q"; then + echo "OK" + else + echo "not OK" + fi +} + searched="" for on_disk in \ "/boot/vmlinuz-`uname -r`"\ - "/boot/vmlinux-`uname -r`"; do + "/boot/vmlinux-`uname -r`"\ + "/boot/kfreebsd-`uname -r`.gz"; do if [ -e "$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`" + if [ -x /usr/bin/lsb_release ] ; then + vendor=$(lsb_release -i -s) + if [ -n "$vendor" ] && [ "xDebian" != "x$vendor" ] ; then + on_disk_version=$( echo $on_disk_version|sed -e "s/ ($vendor [[:alnum:]\.-]\+ [[:alnum:]\.]\+)//") + fi + fi + [ -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 $on_disk" done @@ -91,17 +206,38 @@ if ! [ -e "$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 $WARNING + ret="$(get_avail linux)" + if [ $? = 1 ]; then + echo "WARNING: Kernel needs upgrade [$ret]" + exit $WARNING + fi else - echo "OK: Running kernel matches on disk image: [$running_version]" - exit $OK + image_current=$(freebsd_check_running_version $on_disk) + running_version="`uname -s` `uname -r` `uname -v`" + if [ "$image_current" != "OK" ]; then + approx_time="$(date -d "@`stat -c '%Y' "$on_disk"`" +"%Y-%m-%d %H:%M:%S")" + echo "WARNING: Currently running kernel ($running_version) does not match on disk image (~ $approx_time)" + exit $WARNING; + fi + + ret="$(get_avail linux)" + if [ $? = 1 ]; then + echo "WARNING: Kernel needs upgrade [$ret]" + exit $WARNING + fi fi + +echo "OK: Running kernel matches on disk image: [$running_version]" +exit $OK