Add checkmk script which generates json output

scripts/gitlab-checkmk-stats.rb

+#!/usr/bin/env ruby
+require 'socket'
+require 'json'
+
+socket_file = '/omd/sites/gitlab/tmp/run/live'
+stats_file = '/tmp/gitlab-checkmk-stats'
+
+def get_value(text, filter)
+  value = text.gsub(filter, '')
+  value.gsub!(/;.*/, '')
+end
+
+def set_value(hash, key, value)
+  hash[key] = [] unless hash.has_key?(key)
+
+  hash[key].shift if hash[key].count > 1440
+  hash[key] = hash[key] + [value]
+  return hash
+end
+
+socket = UNIXSocket.new(socket_file)
+socket.puts("GET services\nFilter: host_name = gitlab.com\nColumns: display_name state perf_data host_display_name host_state host_perf_data\nOutputFormat: json")
+socket.shutdown('SHUT_WR')
+services = JSON.parse(socket.read)
+socket.close
+
+begin
+  stats_file = File.new(stats_file, 'r')
+  stats = JSON.parse(stats_file.read)
+  stats_file.close
+rescue
+  stats = {}
+end
+
+time = Time.new.to_i
+services.each do | service |
+  if service[0].include?('SSH')
+    value = get_value(service[5], 'rta=')
+    stats = set_value(stats, 'latency', {'time' => time, 'state' => service[4], 'value' => value})
+    name = 'ssh response time'
+    value = get_value(service[2], 'time=')
+    stats = set_value(stats, name, {'time' => time, 'state' => service[1], 'value' => value})
+  end
+  if service[0] == "HTTP /"
+    name = 'http response time'
+    value = get_value(service[2], 'time=')
+    stats = set_value(stats, name, {'time' => time, 'state' => service[1], 'value' => value})
+  end
+  if service[0].include?('gitlab-ce')
+    name = 'http project response time'
+    value = get_value(service[2], 'time=')
+    stats = set_value(stats, name, {'time' => time, 'state' => service[1], 'value' => value})
+  end
+end
+
+json = JSON.generate(stats)
+tmp_stats_file = File.new(stats_file, 'w')
+tmp_stats_file.write(json)
+tmp_stats_file.close
+puts json