Merge pull request #1538 from wopfel/uptime-plugin

Uptime plugin

1 files changed, 315 insertions, 0 deletions

diff --git a/plugins-scripts/check_uptime.pl b/plugins-scripts/check_uptime.pl
new file mode 100755
index 0000000..4c9f22d
--- /dev/null
+++ b/plugins-scripts/check_uptime.pl
@@ -0,0 +1,315 @@
+#!@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
+                                        $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  $mins;
+# Replace last occurence of comma with "and"
+$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 {
+        $state_str = "OK";
+}
+
+$msg = "$state_str: ";
+
+$msg .= "uptime is $uptime_seconds seconds. ";
+$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 $state;
+
+
+#####################################
+#### subs
+
+
+sub process_arguments(){
+        GetOptions
+                ("V"   => \$opt_V, "version"    => \$opt_V,
+                 "v"   => \$opt_v, "verbose"    => \$opt_v,
+                 "h"   => \$opt_h, "help"               => \$opt_h,
+                 "w=s" => \$opt_w, "warning=s"  => \$opt_w,   # warning if above this number
+                 "c=s" => \$opt_c, "critical=s" => \$opt_c,       # critical if above this number
+                 "f"   => \$opt_f, "for"        => \$opt_f,       # show "running for ..."
+                 "s"   => \$opt_s, "since"      => \$opt_s,       # show "running since ..."
+                 );
+
+        if ($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 "-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;
+
+}