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 = 
'1.3.0'

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 



82
83
84
85
 
# File 'lib/haproxyctl.rb', line 82

def display_usage!
  puts usage
  exit
end

#reload(pid) ⇒ Object 



31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
 
# 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 



8
9
10
11
12
13
14
15
16
17
18
19
 
# 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 



21
22
23
24
25
26
27
28
29
 
# 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 



50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
 
# 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 



87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
 
# File 'lib/haproxyctl.rb', line 87

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