Get the current MongoDB oplog time

fucko.rb

#!/usr/bin/env ruby

require 'mongo'
require 'orderedhash'
include Mongo

c = MongoClient.new('localhost').db('admin')
  
def getReplSetStatus(c)
  cmd = OrderedHash.new
  cmd['replSetGetStatus'] = 1
  begin
    c.command(cmd)
  rescue
    nil
  end
end

status = getReplSetStatus(c)
unless status.nil?
  hostname = `hostname -f`.strip
  me = status['members'].select { |m| m['name'] =~ /#{hostname}/ }.first
  puts me['optime'].seconds
  puts me['optime'].increment
end