diff options
| -rwxr-xr-x | nagios-check-default-gw | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/nagios-check-default-gw b/nagios-check-default-gw new file mode 100755 index 0000000..88b3ef0 --- /dev/null +++ b/nagios-check-default-gw @@ -0,0 +1,49 @@ +#!/usr/bin/ruby + +require 'optparse' + +NAGIOS_STATUS = { :OK => 0, :WARNING => 1, :CRITICAL => 2, :UNKNOWN => -1 }; +@verbose = 0; +@additional_nameservers = [] + +def show_help(parser, code=0, io=STDOUT) + program_name = File.basename($0, '.*') + io.puts "Usage: #{program_name} [options]" + io.puts parser.summarize + exit(code) +end +ARGV.options do |opts| + opts.on_tail("-h", "--help" , "Display this help screen") { show_help(opts) } + opts.parse! +end +show_help(ARGV.options, 1, STDERR) if ARGV.length > 0 + +unless File.executable?('/sbin/ip') + puts "/sbin/ip is not executable" + exit NAGIOS_STATUS[:UNKNOWN] +end + +ip_output = nil +IO.popen("-") do |f| + unless f # child + begin + exec('/sbin/ip', 'route', 'show', '0.0.0.0/0') + rescue => e + puts "Cannot exec ip: "+e.message + exit 1 + end + end + ip_output = f.readlines +end + +if $? != 0 + puts "Child exited with non-zero exit code(%d): %s"%[$? >> 8, ip_output] +else + if ip_output.length > 0 + puts "OK: %s" % [ip_output.join(' ')] + exit NAGIOS_STATUS[:OK] + else + puts "CRITICAL: no default route found." + exit NAGIOS_STATUS[:CRITICAL] + end +end |