12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
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
81
82
83
84
85
86
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
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
# File 'lib/watch_tower/cli/start.rb', line 12
def self.included(base)
base.class_eval <<-END, __FILE__, __LINE__ + 1
# Mappings (aliases)
map "-s" => :start
# Start watchtower
desc "start", "Start the Watch Tower"
method_option :bootloader,
type: :boolean,
required: false,
aliases: "-b",
default: false,
desc: "Is it invoked from the bootloader?"
method_option :foreground,
type: :boolean,
required: false,
aliases: "-f",
default: false,
desc: "Do not run in the background."
method_option :host,
type: :string,
required: false,
aliases: "-h",
default: 'localhost',
desc: "Set the server's host"
method_option :port,
type: :numeric,
required: false,
aliases: "-p",
default: 9282,
desc: "Set the server's port."
method_option :debug,
type: :boolean,
required: false,
aliases: "-d",
default: false,
desc: "Run in debug mode."
def start
# Set the logger to debug mode if necessary
LOG.level = Logger::DEBUG if options[:debug]
begin
if Config[:enabled] &&
(!options[:bootloader] || (options[:bootloader] && Config[:launch_on_boot]))
LOG.info "#{__FILE__}:#{__LINE__}: Starting WatchTower."
start!
LOG.info "#{__FILE__}:#{__LINE__}: WatchTower has finished."
else
abort "You need to edit the config file located at \#{Config.config_file}."
end
rescue ConfigNotReadableError => e
LOG.fatal "#{__FILE__}:#{__LINE__}: The config file is not readable."
STDERR.puts "The config file is not readable, please make sure \#{Config.config_file} exists and you have the necessary permissions to read it."
exit(1)
rescue ConfigNotValidError => e
LOG.fatal "#{__FILE__}:#{__LINE__}: The config file is not valid: \#{e.message}."
STDERR.puts "The config file \#{Config.config_file} is not valid: \#{e.message}."
exit(1)
end
end
protected
def start!
if options[:foreground]
LOG.debug "#{__FILE__}:#{__LINE__}: Running WatchTower in foreground."
# Start WatchTower
start_watch_tower
else
LOG.debug "#{__FILE__}:#{__LINE__}: Running WatchTower in the background."
pid = fork do
begin
# Try to replace ruby with WatchTower in the command line (for ps)
$0 = 'watchtower' unless $0 == 'watchtower'
# Tell ruby that we are a daemon
Process.daemon
# Start WatchTower
start_watch_tower
rescue => e
LOG.fatal "#{__FILE__}:#{__LINE__ - 2}: The process raised an exception \#{e.message}"
LOG.fatal "#{__FILE__}:#{__LINE__ - 3}: ==== Backtrace ===="
e.backtrace.each do |trace|
LOG.fatal "#{__FILE__}:#{__LINE__ - 5}: \#{trace}"
end
end
end
end
end
# Start watch tower
# This method just start the watch tower it doesn't know
# or care if we are in a forked process or not, all it cares about
# is starting the database server before starting the eye
#
# see #start_server
# see #start_eye
def start_watch_tower
# Start the server
start_server
# Wait until the database starts
until Server::Database.is_connected? do
sleep(1)
end
# Wait until the database has migrated
until Server::Database.is_migrated? do
sleep(1)
end
# Start the eye now.
start_eye
end
# Start the eye
# This method just start the watch tower it doesn't know
# or care if we are in a forked process or not
def start_eye
LOG.debug "#{__FILE__}:#{__LINE__}: Starting the eye."
Eye.start!(watch_tower_options)
end
# Start the web server
# This method just start the watch tower it doesn't know
# or care if we are in a forked process or not
def start_server
LOG.debug "#{__FILE__}:#{__LINE__}: Starting the web server."
Server.start!(watch_tower_options)
end
# Return Watch Tower options
# same as options but modified to correspond to WatchTower options
# instead of CLI options
#
# @return [Hash] options
def watch_tower_options
return @watch_tower_options if @watch_tower_options
@watch_tower_options = options.dup
@watch_tower_options.delete(:bootloader)
# Log the options as a Debug
LOG.debug "#{__FILE__}:#{__LINE__}: Options are \#{@watch_tower_options.inspect}."
# Return the options
@watch_tower_options
end
END
end
|