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Diffstat (limited to 'plugins-scripts/check_uptime.pl')
| -rwxr-xr-x | plugins-scripts/check_uptime.pl | 328 |
1 files changed, 328 insertions, 0 deletions
diff --git a/plugins-scripts/check_uptime.pl b/plugins-scripts/check_uptime.pl new file mode 100755 index 0000000..d73e40e --- /dev/null +++ b/plugins-scripts/check_uptime.pl @@ -0,0 +1,328 @@ +#!@PERL@ -w + +# check_uptime - check uptime to see how long the system is running. +# + +# License Information: +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 +# USA +# +############################################################################ + +use POSIX; +use strict; +use Getopt::Long; +use vars qw($opt_V $opt_h $opt_v $verbose $PROGNAME $opt_w $opt_c + $opt_f $opt_s $opt_d + $lower_warn_threshold $upper_warn_threshold + $lower_crit_threshold $upper_crit_threshold + $status $state $msg); +use FindBin; +use lib "$FindBin::Bin"; +use utils qw(%ERRORS &print_revision &support &usage ); + +sub print_help (); +sub print_usage (); +sub process_arguments (); + +$ENV{'PATH'}='@TRUSTED_PATH@'; +$ENV{'BASH_ENV'}=''; +$ENV{'ENV'}=''; +$PROGNAME = "check_uptime"; +$state = $ERRORS{'UNKNOWN'}; + +my $uptime_file = "/proc/uptime"; + + +# Process arguments + +Getopt::Long::Configure('bundling'); +$status = process_arguments(); +if ($status){ + print "ERROR: processing arguments\n"; + exit $ERRORS{"UNKNOWN"}; +} + + +# Get uptime info from file + +if ( ! -r $uptime_file ) { + print "ERROR: file '$uptime_file' is not readable\n"; + exit $ERRORS{"UNKNOWN"}; +} + +if ( ! open FILE, "<", $uptime_file ) { + print "ERROR: cannot read from file '$uptime_file'\n"; + exit $ERRORS{"UNKNOWN"}; +} + +chomp( my $file_content = <FILE> ); +close FILE; + +print "$uptime_file: $file_content\n" if $verbose; + +# Get first digit value (without fraction) +my ( $uptime_seconds ) = $file_content =~ /^([\d]+)/; + +# Bail out if value is not numeric +if ( $uptime_seconds !~ /^\d+$/ ) { + print "ERROR: no numeric value: $uptime_seconds\n"; + exit $ERRORS{"UNKNOWN"}; +} + + +# Do calculations for a "pretty" format (2 weeks, 5 days, ...) + +my ( $secs, $mins, $hours, $days, $weeks ); +$secs = $uptime_seconds; +$mins = $hours = $days = $weeks = 0; +if ( $secs > 100 ) { + $mins = int( $secs / 60 ); + $secs -= $mins * 60; +} +if ( $mins > 100 ) { + $hours = int( $mins / 60 ); + $mins -= $hours * 60; +} +if ( $hours > 48 ) { + $days = int( $hours / 24 ); + $hours -= $days * 24; +} +if ( $days > 14 ) { + $weeks = int( $days / 7 ); + $days -= $weeks * 7; +} + +my $pretty_uptime = ""; +$pretty_uptime .= sprintf( "%d week%s, ", $weeks, $weeks == 1 ? "" : "s" ) if $weeks; +$pretty_uptime .= sprintf( "%d day%s, ", $days, $days == 1 ? "" : "s" ) if $days; +$pretty_uptime .= sprintf( "%d hour%s, ", $hours, $hours == 1 ? "" : "s" ) if $hours; +$pretty_uptime .= sprintf( "%d minute%s, ", $mins, $mins == 1 ? "" : "s" ) if $mins; +# Replace last occurrence of comma with "and" +$pretty_uptime =~ s/, $/ and /; +# Always print the seconds (though it may be 0 seconds) +$pretty_uptime .= sprintf( "%d second%s", $secs, $secs == 1 ? "" : "s" ); + + +# Default to catch errors in program +my $state_str = "UNKNOWN"; + +# Check values +my $out_of_bounds_text = ""; +if ( $uptime_seconds > $upper_crit_threshold ) { + $state_str = "CRITICAL"; + $out_of_bounds_text = "upper crit"; +} elsif ( $uptime_seconds < $lower_crit_threshold ) { + $state_str = "CRITICAL"; + $out_of_bounds_text = "lower crit"; +} elsif ( $uptime_seconds > $upper_warn_threshold ) { + $state_str = "WARNING"; + $out_of_bounds_text = "upper warn"; +} elsif ( $uptime_seconds < $lower_warn_threshold ) { + $state_str = "WARNING"; + $out_of_bounds_text = "lower warn"; +} else { + $state_str = "OK"; +} + +# Prepare uptime value (seconds or days) +my $uptime_text = ""; +my $uptime_unit = ""; +if ( $opt_d ) { + $uptime_text = floor($uptime_seconds / 60 / 60 / 24); + $uptime_unit = "days"; +} else { + $uptime_text = $uptime_seconds; + $uptime_unit = "seconds"; +} + +$msg = "$state_str: "; + +$msg .= "Uptime is $uptime_text $uptime_unit. "; +$msg .= "Exceeds $out_of_bounds_text threshold. " if $out_of_bounds_text; +$msg .= "Running for $pretty_uptime. " if $opt_f; +if ( $opt_s ) { + my $up_since = strftime( "%Y-%m-%d %H:%M:%S", localtime( time - $uptime_seconds ) ); + $msg .= "Running since $up_since. "; +} + +$state = $ERRORS{$state_str}; + +# Perfdata support +print "$msg|uptime=${uptime_seconds}s;$upper_warn_threshold;$upper_crit_threshold;0\n"; +exit $state; + + +##################################### +#### subs + + +sub process_arguments(){ + GetOptions + ("V" => \$opt_V, "version" => \$opt_V, + "v" => \$opt_v, "verbose" => \$opt_v, + "h" => \$opt_h, "help" => \$opt_h, + "w=s" => \$opt_w, "warning=s" => \$opt_w, # warning if above this number + "c=s" => \$opt_c, "critical=s" => \$opt_c, # critical if above this number + "f" => \$opt_f, "for" => \$opt_f, # show "running for ..." + "s" => \$opt_s, "since" => \$opt_s, # show "running since ..." + "d" => \$opt_d, "days" => \$opt_d, # report uptime in days + ); + + if ($opt_V) { + print_revision($PROGNAME,'@NP_VERSION@'); + exit $ERRORS{'UNKNOWN'}; + } + + if ($opt_h) { + print_help(); + exit $ERRORS{'UNKNOWN'}; + } + + if (defined $opt_v) { + $verbose = $opt_v; + } + + unless ( defined $opt_w && defined $opt_c ) { + print_usage(); + exit $ERRORS{'UNKNOWN'}; + } + + # Check if a range was supplied ("lowvalue:highvalue") for warning and critical + # Otherwise, set 0 as the lower threshold and the parameter value as upper threshold + # (the uptime should always be positive, so there should be no issue) + if ( $opt_w =~ /^(.+):(.+)$/ ) { + $lower_warn_threshold = $1; + $upper_warn_threshold = $2; + } else { + $lower_warn_threshold = 0; + $upper_warn_threshold = $opt_w; + } + if ( $opt_c =~ /^(.+):(.+)$/ ) { + $lower_crit_threshold = $1; + $upper_crit_threshold = $2; + } else { + $lower_crit_threshold = 0; + $upper_crit_threshold = $opt_c; + } + + # Set as seconds (calculate if suffix present) + $lower_warn_threshold = calc_as_seconds( $lower_warn_threshold ); + $lower_crit_threshold = calc_as_seconds( $lower_crit_threshold ); + $upper_warn_threshold = calc_as_seconds( $upper_warn_threshold ); + $upper_crit_threshold = calc_as_seconds( $upper_crit_threshold ); + + # Check for numeric value of warning parameter + if ( $lower_warn_threshold !~ /^\d+$/ ) { + print "Lower warning (-w) is not numeric\n"; + exit $ERRORS{'UNKNOWN'}; + } + if ( $upper_warn_threshold !~ /^\d+$/ ) { + print "Upper warning (-w) is not numeric\n"; + exit $ERRORS{'UNKNOWN'}; + } + # Check for numeric value of critical parameter + if ( $lower_crit_threshold !~ /^\d+$/ ) { + print "Lower critical (-c) is not numeric\n"; + exit $ERRORS{'UNKNOWN'}; + } + if ( $upper_crit_threshold !~ /^\d+$/ ) { + print "Upper critical (-c) is not numeric\n"; + exit $ERRORS{'UNKNOWN'}; + } + + # Check boundaries + if ( $upper_warn_threshold >= $upper_crit_threshold ) { + print "Upper Warning (-w) cannot be greater than Critical (-c)!\n"; + exit $ERRORS{'UNKNOWN'}; + } + # No "<=" since both values are zero if no range (only upper threshold values) is given + if ( $lower_warn_threshold < $lower_crit_threshold ) { + print "Lower Warning (-w) cannot be less than Critical (-c)!\n"; + exit $ERRORS{'UNKNOWN'}; + } + + return $ERRORS{'OK'}; +} + +sub print_usage () { + print "Usage: $PROGNAME -w <warn> -c <crit> [-v]\n"; +} + +sub print_help () { + print_revision($PROGNAME,'@NP_VERSION@'); + print "Copyright (c) 2002 Subhendu Ghosh/Carlos Canau/Benjamin Schmid\n"; + print "Copyright (c) 2018 Bernd Arnold\n"; + print "\n"; + print_usage(); + print "\n"; + print " Checks the uptime of the system using $uptime_file\n"; + print "\n"; + print "-w (--warning) = Min. number of uptime to generate warning\n"; + print "-c (--critical) = Min. number of uptime to generate critical alert ( w < c )\n"; + print "-f (--for) = Show uptime in a pretty format (Running for x weeks, x days, ...)\n"; + print "-s (--since) = Show last boot in yyyy-mm-dd HH:MM:SS format (output from 'uptime -s')\n"; + print "-d (--days) = Show uptime in days\n"; + print "-h (--help)\n"; + print "-V (--version)\n"; + print "-v (--verbose) = debugging output\n"; + print "\n\n"; + print "Note: -w and -c are required arguments.\n"; + print " You can suffix both values with s for seconds (default), m (minutes), h (hours), d (days) or w (weeks).\n"; + print "\n"; + print "Range support: You may specify a range for both warning and critical thresholds.\n"; + print " This works without additional Perl modules.\n"; + print "Example: ./check_uptime -w 10m:4w -c 1m:8w\n"; + print " Results in a critical state when uptime is below 60 seconds or higher than 8 weeks,\n"; + print " and in a warning state when uptime is below 10 minutes or above 4 weeks.\n"; + print "\n\n"; + support(); +} + +sub calc_as_seconds () { + + my $parameter = shift; + + # Check if suffix is present + # Calculate parameter to seconds (to get an integer value finally) + # If no suffix is present, just return the value + + # Possible suffixes: + # s = seconds + # m = minutes + # h = hours + # d = days + # w = weeks + my %factor = ( "s" => 1, + "m" => 60, + "h" => 60 * 60, + "d" => 60 * 60 * 24, + "w" => 60 * 60 * 24 * 7, + ); + + if ( $parameter =~ /^(\d+)([a-z])$/ ) { + my $value = $1; + my $suffix = $2; + print "detected: value=$value, suffix=$suffix\n" if $verbose; + if ( ! defined $factor{$suffix} ) { + print "Error: wrong suffix ($suffix) for value '$parameter'"; + exit $ERRORS{'UNKNOWN'}; + } + $parameter = $value * $factor{$suffix}; + } + + return $parameter; + +} |