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
217
218
219
220
221
222
223
224
225
|
module LeapCli
module Commands
desc "Compile generated files."
command [:compile, :c] do |c|
c.desc 'Compiles node configuration files into hiera files used for deployment.'
c.arg_name 'ENVIRONMENT', :optional => true
c.command :all do |all|
all.action do |global_options,options,args|
environment = args.first
if !LeapCli.leapfile.environment.nil? && !environment.nil? && environment != LeapCli.leapfile.environment
bail! "You cannot specify an ENVIRONMENT argument while the environment is pinned."
end
if environment && manager.environment_names.include?(environment)
compile_hiera_files(manager.filter([environment]))
else
compile_hiera_files(manager.filter)
end
end
end
c.desc "Compile a DNS zone file for your provider."
c.command :zone do |zone|
zone.action do |global_options, options, args|
compile_zone_file
end
end
c.default_command :all
end
protected
def compile_hiera_files(nodes=nil)
# these must come first
update_compiled_ssh_configs
# export generated files
manager.export_nodes(nodes)
# a "clean" export of secrets will also remove keys that are no longer used,
# but this should not be done if we are not examining all possible nodes.
clean_export = nodes.nil?
manager.export_secrets(clean_export)
end
def update_compiled_ssh_configs
generate_monitor_ssh_keys
update_authorized_keys
update_known_hosts
end
##
## SSH
##
#
# generates a ssh key pair that is used only by remote monitors
# to connect to nodes and run certain allowed commands.
#
# every node has the public monitor key added to their authorized
# keys, and every monitor node has a copy of the private monitor key.
#
def generate_monitor_ssh_keys
priv_key_file = path(:monitor_priv_key)
pub_key_file = path(:monitor_pub_key)
unless file_exists?(priv_key_file, pub_key_file)
ensure_dir(File.dirname(priv_key_file))
ensure_dir(File.dirname(pub_key_file))
cmd = %(ssh-keygen -N '' -C 'monitor' -t rsa -b 4096 -f '%s') % priv_key_file
assert_run! cmd
if file_exists?(priv_key_file, pub_key_file)
log :created, priv_key_file
log :created, pub_key_file
else
log :failed, 'to create monitor ssh keys'
end
end
end
#
# Compiles the authorized keys file, which gets installed on every during init.
# Afterwards, puppet installs an authorized keys file that is generated differently
# (see authorized_keys() in macros.rb)
#
def update_authorized_keys
buffer = StringIO.new
keys = Dir.glob(path([:user_ssh, '*']))
if keys.empty?
bail! "You must have at least one public SSH user key configured in order to proceed. See `leap help add-user`."
end
if file_exists?(path(:monitor_pub_key))
keys << path(:monitor_pub_key)
end
keys.sort.each do |keyfile|
ssh_type, ssh_key = File.read(keyfile).strip.split(" ")
buffer << ssh_type
buffer << " "
buffer << ssh_key
buffer << " "
buffer << Path.relative_path(keyfile)
buffer << "\n"
end
write_file!(:authorized_keys, buffer.string)
end
#
# generates the known_hosts file.
#
# we do a 'late' binding on the hostnames and ip part of the ssh pub key record in order to allow
# for the possibility that the hostnames or ip has changed in the node configuration.
#
def update_known_hosts
buffer = StringIO.new
buffer << "#\n"
buffer << "# This file is automatically generated by the command `leap`. You should NOT modify this file.\n"
buffer << "# Instead, rerun `leap node init` on whatever node is causing SSH problems.\n"
buffer << "#\n"
manager.nodes.keys.sort.each do |node_name|
node = manager.nodes[node_name]
hostnames = [node.name, node.domain.internal, node.domain.full, node.ip_address].join(',')
pub_key = read_file([:node_ssh_pub_key,node.name])
if pub_key
buffer << [hostnames, pub_key].join(' ')
buffer << "\n"
end
end
write_file!(:known_hosts, buffer.string)
end
##
## ZONE FILE
##
def relative_hostname(fqdn)
@domain_regexp ||= /\.?#{Regexp.escape(provider.domain)}$/
fqdn.sub(@domain_regexp, '')
end
#
# serial is any number less than 2^32 (4294967296)
#
def compile_zone_file
hosts_seen = {}
f = $stdout
f.puts ZONE_HEADER % {:domain => provider.domain, :ns => provider.domain, :contact => provider.contacts.default.first.sub('@','.')}
max_width = manager.nodes.values.inject(0) {|max, node| [max, relative_hostname(node.domain.full).length].max }
put_line = lambda do |host, line|
host = '@' if host == ''
f.puts("%-#{max_width}s %s" % [host, line])
end
f.puts ORIGIN_HEADER
# 'A' records for primary domain
manager.nodes[:environment => '!local'].each_node do |node|
if node.dns['aliases'] && node.dns.aliases.include?(provider.domain)
put_line.call "", "IN A #{node.ip_address}"
end
end
# NS records
if provider['dns'] && provider.dns['nameservers']
provider.dns.nameservers.each do |ns|
put_line.call "", "IN NS #{ns}."
end
end
# all other records
manager.environment_names.each do |env|
next if env == 'local'
nodes = manager.nodes[:environment => env]
next unless nodes.any?
f.puts ENV_HEADER % (env.nil? ? 'default' : env)
nodes.each_node do |node|
if node.dns.public
hostname = relative_hostname(node.domain.full)
put_line.call relative_hostname(node.domain.full), "IN A #{node.ip_address}"
end
if node.dns['aliases']
node.dns.aliases.each do |host_alias|
if host_alias != node.domain.full && host_alias != provider.domain
put_line.call relative_hostname(host_alias), "IN CNAME #{relative_hostname(node.domain.full)}"
end
end
end
if node.services.include? 'mx'
put_line.call relative_hostname(node.domain.full_suffix), "IN MX 10 #{relative_hostname(node.domain.full)}"
end
end
end
end
ENV_HEADER = %[
;;
;; ENVIRONMENT %s
;;
]
ZONE_HEADER = %[
;;
;; BIND data file for %{domain}
;;
$TTL 600
$ORIGIN %{domain}.
@ IN SOA %{ns}. %{contact}. (
0000 ; serial
7200 ; refresh ( 24 hours)
3600 ; retry ( 2 hours)
1209600 ; expire (1000 hours)
600 ) ; minimum ( 2 days)
;
]
ORIGIN_HEADER = %[
;;
;; ZONE ORIGIN
;;
]
end
end
|
