nagios/check_crl: review and debug
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1 changed files with 41 additions and 95 deletions
134
nagios/check_crl.sh
Normal file → Executable file
134
nagios/check_crl.sh
Normal file → Executable file
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@ -4,19 +4,27 @@
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# GPL v3+
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# Default values
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# Warning : 10 days - 10 years
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RANGE_WARNING="864000:315360000"
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# Critical : 4 days
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RANGE_CRITICAL="345600:"
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# Warning : 7 days - 10 years
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# (juste because more than 10 years is really far stretched and might be a manipulation error)
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RANGE_WARNING="7:3650"
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# Critical : 3 days
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RANGE_CRITICAL="3:"
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# Output
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OUTPUT_EXIT_STATUS=0
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OUTPUT_DETAIL_WARNING=""
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OUTPUT_DETAIL_CRITICAL=""
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#OUTPUT_PERFDATA=""
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PROGPATH=$( echo $0 | sed -e 's,[\\/][^\\/][^\\/]*$,,' )
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REVISION="0.2"
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# Stop at the first non-catched error
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set -e
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# Include check_range()
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. $PROGPATH/utils.sh
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#
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# Help function
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#
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@ -25,7 +33,7 @@ usage() {
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Usage :
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$0 [-w warning_range] [-c critical_range] -f file.crl [[-w...] -f file.crl ] ...
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Ranges are in seconds.
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Thresholds in days.
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Note: Since the file is checked against the lastest ranges given, order
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of the arguments are important.
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@ -36,88 +44,18 @@ Default values:
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EOF
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}
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# TODO: manage non-integer values
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# Args :
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# - value
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# - range warning
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# - range critical
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# Return:
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# 0: ok
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# 8: syntax error in range
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# 9: higher threshold lower than lower threshold
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check_range_syntax() {
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local REGEXP LOWER_THRESHOLD HIGHER_THRESHOLD
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# Check syntax
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REGEXP='@\?\(-\?[0-9]\+:\|~:\|:\|\)\(-\?[0-9]\+\|~\|\)'
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test -n "$( echo "$1" | sed -n "/^$REGEXP$/p" )" || return 8
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# Check that lower limit is lower than higher limit :)
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LOWER_THRESHOLD=$( echo "$1" | sed -n "s/$REGEXP/\1/p" | sed 's/:$//' )
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HIGHER_THRESHOLD=$( echo "$1" | sed -n "s/$REGEXP/\2/p" )
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if test -z "$LOWER_THRESHOLD"; then
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LOWER_THRESHOLD=0
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fi
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if test -z "$HIGHER_THRESHOLD"; then
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HIGHER_THRESHOLD='~'
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fi
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if [ "$LOWER_THRESHOLD" != "~" ]; then
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if [ "$HIGHER_THRESHOLD" != "~" ] && [ "$LOWER_THRESHOLD" -gt "$HIGHER_THRESHOLD" ]; then
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return 9
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fi
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fi
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printf "%s\t%s" "$LOWER_THRESHOLD" "$HIGHER_THRESHOLD"
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return 0
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}
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# Args :
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# - value
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# - range
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# Return :
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# 0: ok
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# 1: not in range
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# 8-15: see check_range_syntax()
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# 16: function call problem
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check_range() {
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local VALUE LINE RET LOWER_THRESHOLD HIGHER_THRESHOLD
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# ranges can be empty
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test -n "$1" || return 16
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VALUE="$1"
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RANGE="$2"
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# Analyze range
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LINE=$( check_range_syntax "$RANGE" )
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RET="$?"
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test $RET -eq 0 || return $RET
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LOWER_THRESHOLD="$( echo "$LINE" | cut -f 1 )"
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HIGHER_THRESHOLD="$( echo "$LINE" | cut -f 2 )"
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# Check value
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if [ $( echo "$RANGE" | grep -c "^@" ) -eq 0 ]; then
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# Normal comparison
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if [ "$LOWER_THRESHOLD" != "~" ] && [ "$VALUE" -lt "$LOWER_THRESHOLD" ]; then
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check_range 0 "$1" >/dev/null 2>&1
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if [ "$?" -eq "2" ]; then
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return 1
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fi
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if [ "$HIGHER_THRESHOLD" != "~" ] && [ "$VALUE" -gt "$HIGHER_THRESHOLD" ]; then
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return 1
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fi
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else
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# Invert range (inside, inclusive)
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if [ "$LOWER_THRESHOLD" = '~' ] || [ "$VALUE" -ge "$LOWER_THRESHOLD" ]; then
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if [ "$HIGHER_THRESHOLD" = '~' ] || [ "$VALUE" -le "$HIGHER_THRESHOLD" ]; then
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return 1
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fi
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fi
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fi
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return 0
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}
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# Some early checks
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if ! which openssl >/dev/null 2>&1 ; then
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echo "UNKNOWN 'openssl' not found."
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exit 1
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exit $STATE_UNKNOWN
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fi
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#
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@ -134,8 +72,8 @@ while getopts hw:c:f: OPT; do
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if check_range_syntax "$OPTARG" >/dev/null; then
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RANGE_WARNING="$OPTARG"
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else
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echo "UNKNOWN: invalid range."
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exit 3
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echo "UNKNOWN: invalid range : $OPTARG"
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exit $STATE_UNKNOWN
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fi
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;;
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@ -143,8 +81,8 @@ while getopts hw:c:f: OPT; do
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if check_range_syntax "$OPTARG" >/dev/null; then
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RANGE_CRITICAL="$OPTARG"
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else
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echo "UNKNOWN: invalid range."
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exit 3
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echo "UNKNOWN: invalid range : $OPTARG"
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exit $STATE_UNKNOWN
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fi
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;;
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@ -153,27 +91,27 @@ while getopts hw:c:f: OPT; do
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# should not be done during params management :)
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CRL_FILE="$OPTARG"
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if [ ! -f "$CRL_FILE" ]; then
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echo "UNKNOWN: inexistent file."
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exit 3
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echo "UNKNOWN: inexistent file : $CRL_FILE"
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exit $STATE_UNKNOWN
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fi
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# Extract time left, in seconds
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EXPIRATION_DATE="$( openssl crl -noout -text -in "$CRL_FILE" | sed -n "s/^[[:space:]]\+Next Update: \(.*\)$/\1/p" )"
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if [ -z "$EXPIRATION_DATE" ]; then
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echo "UNKNOWN: couldn't get expiration date."
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exit 3
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exit $STATE_UNKNOWN
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fi
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TIME_LEFT=$(( $( date +%s ) - $( date --date="$EXPIRATION_DATE" +%s ) ))
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TIME_LEFT=$(( ( $( date --date="$EXPIRATION_DATE" +%s ) - $( date +%s ) ) / 86400 ))
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# Check time left against range
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if ! check_range "$TIME_LEFT" "$RANGE_CRITICAL"; then
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OUTPUT_EXIT_STATUS=2
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OUTPUT_DETAIL_CRITICAL="$OUTPUT_DETAIL_CRITICAL crl:$CRL_FILE"
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elif ! check_range "$CPT" "$RANGE_WARNING"; then
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if check_range "$TIME_LEFT" "$RANGE_CRITICAL"; then
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OUTPUT_EXIT_STATUS=$STATE_CRITICAL
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OUTPUT_DETAIL_CRITICAL="$OUTPUT_DETAIL_CRITICAL $CRL_FILE ($TIME_LEFT days left)"
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elif check_range "$TIME_LEFT" "$RANGE_WARNING"; then
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if [ "$OUTPUT_EXIT_STATUS" -eq 0 ]; then
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OUTPUT_EXIT_STATUS=1
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OUTPUT_EXIT_STATUS=$STATE_WARNING
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fi
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OUTPUT_DETAIL_WARNING="$OUTPUT_DETAIL_WARNING crl:$CRL_FILE"
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OUTPUT_DETAIL_WARNING="$OUTPUT_DETAIL_WARNING $CRL_FILE ($TIME_LEFT days left)"
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fi
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;;
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@ -184,6 +122,11 @@ while getopts hw:c:f: OPT; do
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esac
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done
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if [ -z "$CRL_FILE" ]; then
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echo "UNKNOWN: no file tested."
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exit $STATE_UNKNOWN
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fi
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case "$OUTPUT_EXIT_STATUS" in
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'0')
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printf "OK"
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@ -199,6 +142,9 @@ case "$OUTPUT_EXIT_STATUS" in
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;;
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esac
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# on supprime les retours à la ligne
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exit $RETURN_STATUS
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# Perfdata
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#printf "|%s\n" "$OUTPUT_PERFDATA"
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printf "\n"
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# Exit with return status
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exit $OUTPUT_EXIT_STATUS
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