Module: HAProxyCTL

Includes:
Environment
Defined in:
lib/haproxyctl.rb,
lib/haproxyctl/version.rb,
lib/haproxyctl/environment.rb

Defined Under Namespace

Modules: Environment

Constant Summary collapse

VERSION = 
'1.2.0'

Instance Attribute Summary

Attributes included from Environment

#config, #config_path, #exec

Instance Method Summary collapse

Methods included from Environment

#check_running, #has_exec?, #pidfile, #socket, #version

Instance Method Details

#display_usage! ⇒ Object 



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# File 'lib/haproxyctl.rb', line 82

def display_usage!
  puts usage
  exit
end

#reload(pid) ⇒ Object 



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# File 'lib/haproxyctl.rb', line 31

def reload(pid)
  if pid
    puts "gracefully stopping connections on pid #{pid}..."
    system("#{exec} -f #{config_path} -sf #{pid}")
    puts "checking if connections still alive on #{pid}..."
    nowpid = check_running
    while  pid == nowpid
      puts "still haven't killed old pid.
                          waiting 2s for existing connections to die...
                          (ctrl+c to stop this check)"
      sleep 2
      nowpid = check_running || 0
    end
    puts "reloaded haproxy on pid #{nowpid}"
  else
    puts 'haproxy is not running!'
  end
end

#start ⇒ Object 



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# File 'lib/haproxyctl.rb', line 8

def start
  puts 'starting haproxy...'
  system("#{exec} -f #{config_path} -D -p #{pidfile}")
  newpid = check_running
  if newpid =~ /^\d+$/
    puts "haproxy is running on pid #{newpid}"
    return true
  else
    puts 'error. haproxy did not start!'
    return nil
  end
end

#stop(pid) ⇒ Object 



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# File 'lib/haproxyctl.rb', line 21

def stop(pid)
  if pid
    puts "stopping haproxy on pid #{pid}..."
    system("kill #{pid}") || system("kill -9 #{pid}")
    puts '... stopped'
  else
    puts 'haproxy is not running!'
  end
end

#unixsock(command) ⇒ Object 



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# File 'lib/haproxyctl.rb', line 50

def unixsock(command)
  output = []
  runs = 0

  begin
    ctl = UNIXSocket.open(socket)
    if ctl
      ctl.write "#{command}\r\n"
    else
      puts "cannot talk to #{socket}"
    end
  rescue Errno::EPIPE
    ctl.close
    sleep 0.5
    runs += 1
    if  runs < 4
      retry
    else
      puts "the unix socket at #{socket} closed before we could complete this request"
      exit
    end
  end
  while (line = ctl.gets)
    unless  line =~ /Unknown command/
      output << line
    end
  end
  ctl.close

  output
end

#usage ⇒ Object 



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# File 'lib/haproxyctl.rb', line 87

def usage
  "usage: \#{$PROGRAM_NAME} <argument>\nwhere <argument> can be:\n  start                       : start haproxy unless it is already running\n  stop                        : stop an existing haproxy\n  restart                     : immediately shutdown and restart\n  reload                      : gracefully terminate existing connections, reload \#{config_path}\n  status                      : is haproxy running?  on what ports per lsof?\n  configcheck                 : check \#{config_path}\n  nagios                      : nagios-friendly status for running process and listener\n  cloudkick                   : cloudkick.com-friendly status and metric for connected users\n  show health                 : show status of all frontends and backend servers\n  show backends               : show status of backend pools of servers\n  enable all <server>         : re-enable a server previously in maint mode on multiple backends\n  disable all <server>        : disable a server from every backend it exists\n  enable all EXCEPT <server>  : like 'enable all', but re-enables every backend except for <server>\n  disable all EXCEPT <server> : like 'disable all', but disables every backend except for <server>\n  clear counters              : clear max statistics counters (add 'all' for all counters)\n  help                        : this message\n  prompt                      : toggle interactive mode with prompt\n  quit                        : disconnect\n  show info                   : report information about the running process\n  show stat                   : report counters for each proxy and server\n  show errors                 : report last request and response errors for each proxy\n  show sess [id]              : report the list of current sessions or dump this session\n  get weight                  : report a server's current weight\n  set weight                  : change a server's weight\n  set timeout                 : change a timeout setting\n  disable server              : set a server in maintenance mode\n  enable server               : re-enable a server that was previously in maintenance mode\n  version                     : version of this script\n"
end