1
2
3
4
5
6
7
8
9
10
11
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
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
#!/usr/bin/ruby
#
# This is a wrapper script around the puppet command used by the LEAP platform.
#
# We do this in order to make it faster and easier to control puppet remotely
# (exit codes, lockfile, multiple manifests, etc)
#
require 'pty'
require 'yaml'
PUPPET_BIN = '/usr/bin/puppet'
PUPPET_DIRECTORY = '/srv/leap'
PUPPET_PARAMETERS = '--color=false --detailed-exitcodes --libdir=puppet/lib --confdir=puppet'
SITE_MANIFEST = 'puppet/manifests/site.pp'
DEFAULT_TAGS = 'leap_base,leap_service'
HIERA_FILE = '/etc/leap/hiera.yaml'
def main
process_command_line_arguments
with_lockfile do
@commands.each do |command|
self.send(command)
end
end
end
def puts(str)
$stdout.puts str
$stdout.flush
end
def process_command_line_arguments
@commands = []
@verbosity = 1
@tags = DEFAULT_TAGS
loop do
case ARGV[0]
when 'apply' then ARGV.shift; @commands << 'apply'
when 'set_hostname' then ARGV.shift; @commands << 'set_hostname'
when '--verbosity' then ARGV.shift; @verbosity = ARGV.shift.to_i
when '--force' then ARGV.shift; remove_lockfile
when '--tags' then ARGV.shift; @tags = ARGV.shift
when /^-/ then usage("Unknown option: #{ARGV[0].inspect}")
else break
end
end
usage("No command given") unless @commands.any?
end
def apply
exit_code = puppet_apply do |line|
puts line
end
puts "Puppet apply complete (#{exitcode_description(exit_code)})."
end
def set_hostname
hostname = hiera_file['name']
if hostname.nil? || hostname.empty?
puts('ERROR: "name" missing from hiera file')
exit(1)
end
current_hostname_file = File.read('/etc/hostname') rescue nil
current_hostname = `/bin/hostname`.strip
# set /etc/hostname
if current_hostname_file != hostname
File.open('/etc/hostname', 'w', 0611, :encoding => 'ascii') do |f|
f.write hostname
end
if File.read('/etc/hostname') == hostname
puts "Changed /etc/hostname to #{hostname}"
else
puts "ERROR: failed to update /etc/hostname"
end
end
# call /bin/hostname
if current_hostname != hostname
if run("/bin/hostname #{hostname}") == 0
puts "Changed hostname to #{hostname}"
else
puts "ERROR: call to `/bin/hostname #{hostname}` returned an error."
end
end
end
#
# each line of output is yielded. the exit code is returned.
#
def puppet_apply(options={}, &block)
options = {:verbosity => @verbosity, :tags => @tags}.merge(options)
manifest = options[:manifest] || SITE_MANIFEST
fqdn = hiera_file['domain']['name']
Dir.chdir(PUPPET_DIRECTORY) do
return run("FACTER_fqdn='#{fqdn}' #{PUPPET_BIN} apply #{custom_parameters(options)} #{PUPPET_PARAMETERS} #{manifest}", &block)
end
end
#
# Return a ruby object representing the contents of the hiera yaml file.
#
def hiera_file
unless File.exists?(HIERA_FILE)
puts("ERROR: hiera file '#{HIERA_FILE}' does not exist.")
exit(1)
end
$hiera_contents ||= YAML.load_file(HIERA_FILE)
return $hiera_contents
rescue Exception => exc
puts("ERROR: problem reading hiera file '#{HIERA_FILE}' (#{exc})")
exit(1)
end
def custom_parameters(options)
params = []
if options[:tags] && options[:tags].chars.any?
params << "--tags #{options[:tags]}"
end
if options[:verbosity]
case options[:verbosity]
when 3 then params << '--verbose'
when 4 then params << '--verbose --debug'
when 5 then params << '--verbose --debug --trace'
end
end
params.join(' ')
end
def exitcode_description(code)
case code
when 0 then "no changes"
when 1 then "failed"
when 2 then "changes made"
when 4 then "failed"
when 6 then "changes and failures"
else code
end
end
def usage(s)
$stderr.puts(s)
$stderr.puts
$stderr.puts("Usage: #{File.basename($0)} COMMAND [OPTIONS]")
$stderr.puts
$stderr.puts("COMMAND may be one or more of:
set_hostname -- set the hostname of this server
apply -- apply puppet manifests")
$stderr.puts
$stderr.puts("OPTIONS may be one or more of:
--verbosity VERB -- set the verbosity level 0..5
--tags TAGS -- set the tags to pass through to puppet
--force -- run even when lockfile is present")
exit(2)
end
##
## Simple lock file
##
require 'fileutils'
DEFAULT_LOCKFILE = '/tmp/puppet.lock'
def remove_lockfile(lock_file_path=DEFAULT_LOCKFILE)
FileUtils.remove_file(lock_file_path, true)
end
def with_lockfile(lock_file_path=DEFAULT_LOCKFILE)
begin
File.open(lock_file_path, File::CREAT | File::EXCL | File::WRONLY) do |o|
o.write(Process.pid)
end
yield
remove_lockfile
rescue Errno::EEXIST
puts("ERROR: the lock file '#{lock_file_path}' already exists. Wait a minute for the process to die, or run with --force to ignore. Bailing out.")
exit(1)
rescue IOError => exc
puts("ERROR: problem with lock file '#{lock_file_path}' (#{exc}). Bailing out.")
exit(1)
end
end
##
## simple pass through process runner (to ensure output is not buffered and return exit code)
## this only works under ruby 1.9
##
def run(cmd)
puts cmd if @verbosity >= 3
PTY.spawn("#{cmd}") do |output, input, pid|
begin
while line = output.gets do
yield line
end
rescue Errno::EIO
end
Process.wait(pid) # only works in ruby 1.9, required to capture the exit status.
end
return $?.exitstatus
rescue PTY::ChildExited
end
##
## RUN MAIN
##
Signal.trap("EXIT") do
remove_lockfile # clean up the lockfile when process is terminated.
# this will remove the lockfile if ^C killed the process
# but only after the child puppet process is also dead (I think).
end
main()
|
