Class: Diagtool::ValidUtils

Inherits:
Object
  • Object
show all
Defined in:
lib/fluent/diagtool/validutils.rb

Instance Method Summary collapse

Constructor Details

#initialize(log_level) ⇒ ValidUtils

Returns a new instance of ValidUtils.



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# File 'lib/fluent/diagtool/validutils.rb', line 21

def initialize(log_level)
  @logger = Logger.new(STDOUT, level: log_level, formatter: proc {|severity, datetime, progname, msg|
    "#{datetime}: [Validutils] [#{severity}] #{msg}\n"
  })
  @def_ulimit = "65535".to_i
  @def_sysctl = Hash.new()
  @def_sysctl = { :net_core_somaxconn => "1024",
    :net_core_netdev_max_backlog => "5000",
    :net_core_rmem_max => "16777216",
    :net_core_wmem_max => "16777216",
    :net_ipv4_tcp_wmem => ["4096", "12582912", "16777216"],
    :net_ipv4_tcp_rmem => ["4096", "12582912", "16777216"],
    :net_ipv4_tcp_max_syn_backlog => "8096",
    :net_ipv4_tcp_slow_start_after_idle => "0",
    :net_ipv4_tcp_tw_reuse => "1",
    :net_ipv4_ip_local_port_range => ["10240", "65535"]
  }
  @logger.debug("Initialize Validation Utils:")
  @logger.debug("    Default ulimit: #{@def_ulimit}")
  @logger.debug("    Default sysctl: #{@def_sysctl}")
end

Instance Method Details

#valid_sysctl(sysctl_file) ⇒ Object 



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# File 'lib/fluent/diagtool/validutils.rb', line 56

def valid_sysctl(sysctl_file)
  h = Hash.new()
  v = Hash.new { |i,j| i[j] = Hash.new(&h.default_proc) }
  @logger.info("Loading sysctl file: #{sysctl_file}")
  File.readlines(sysctl_file).each{ |line|
    if line.include? "net"
      line_net = line.chomp.gsub(".","_").split("=")
      key = line_net[0].strip.to_sym
      if line_net[1].strip! =~ /\s/
        value = line_net[1].split(/\s/)
      else
        value= line_net[1]
      end
      h[key] = value
	  if @def_sysctl.key? key
        if @def_sysctl[key] == value
          @logger.info("#{key} => #{value} is correct")
          v[key]['value'] = value
          v[key]['recommend'] = @def_sysctl[key]	
          v[key]['result'] = "correct"
        else
          @logger.warn("#{key} => #{value} is incorrect, should be #{@def_sysctl[key]}")
          v[key]['value'] = value
          v[key]['recommend'] = @def_sysctl[key]
          v[key]['result'] = "incorrect"
        end
	  end
    end
  }
  if h == @sysctl
    return true, v
  else
    return false, v
  end
end

#valid_ulimit(ulimit_file) ⇒ Object 



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# File 'lib/fluent/diagtool/validutils.rb', line 43

def valid_ulimit(ulimit_file)
  @logger.info("Loading ulimit file: #{ulimit_file}")
  File.readlines(ulimit_file).each { |line|
    if line.chomp.to_i >= @def_ulimit.to_i
      @logger.info("    ulimit => #{line.chomp.to_i} is correct")
      return true, @def_ulimit.to_i, line.chomp.to_i
    else
      @logger.warn("    ulimit => #{line.chomp.to_i} is incorrect, should be #{@def_ulimit}")
      return false, @def_ulimit.to_i, line.chomp.to_i
    end 
  }
end