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
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
|
#
# Author:: Adam Jacob (<adam@opscode.com>)
# Author:: Chris Read <chris.read@gmail.com>
# Copyright:: Copyright (c) 2008 Opscode, Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
Ohai.plugin(:Network) do
provides "network", "network/interfaces"
provides "counters/network", "counters/network/interfaces"
provides "ipaddress", "ip6address", "macaddress"
def linux_encaps_lookup(encap)
return "Loopback" if encap.eql?("Local Loopback") || encap.eql?("loopback")
return "PPP" if encap.eql?("Point-to-Point Protocol")
return "SLIP" if encap.eql?("Serial Line IP")
return "VJSLIP" if encap.eql?("VJ Serial Line IP")
return "IPIP" if encap.eql?("IPIP Tunnel")
return "6to4" if encap.eql?("IPv6-in-IPv4")
return "Ethernet" if encap.eql?("ether")
encap
end
def iproute2_binary_available?
["/sbin/ip", "/usr/bin/ip"].any? { |path| File.exist?(path) }
end
collect_data(:linux) do
require 'ipaddr'
iface = Mash.new
net_counters = Mash.new
network Mash.new unless network
network[:interfaces] = Mash.new unless network[:interfaces]
counters Mash.new unless counters
counters[:network] = Mash.new unless counters[:network]
# Match the lead line for an interface from iproute2
# 3: eth0.11@eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP
# The '@eth0:' portion doesn't exist on primary interfaces and thus is optional in the regex
IPROUTE_INT_REGEX = /^(\d+): ([0-9a-zA-Z@:\.\-_]*?)(@[0-9a-zA-Z]+|):\s/ unless defined? IPROUTE_INT_REGEX
if iproute2_binary_available?
# families to get default routes from
families = [{
:name => "inet",
:default_route => "0.0.0.0/0",
:default_prefix => :default,
:neighbour_attribute => :arp
},{
:name => "inet6",
:default_route => "::/0",
:default_prefix => :default_inet6,
:neighbour_attribute => :neighbour_inet6
}]
so = shell_out("ip addr")
cint = nil
so.stdout.lines do |line|
if line =~ IPROUTE_INT_REGEX
cint = $2
iface[cint] = Mash.new
if cint =~ /^(\w+)(\d+.*)/
iface[cint][:type] = $1
iface[cint][:number] = $2
end
if line =~ /mtu (\d+)/
iface[cint][:mtu] = $1
end
flags = line.scan(/(UP|BROADCAST|DEBUG|LOOPBACK|POINTTOPOINT|NOTRAILERS|LOWER_UP|NOARP|PROMISC|ALLMULTI|SLAVE|MASTER|MULTICAST|DYNAMIC)/)
if flags.length > 1
iface[cint][:flags] = flags.flatten.uniq
end
end
if line =~ /link\/(\w+) ([\da-f\:]+) /
iface[cint][:encapsulation] = linux_encaps_lookup($1)
unless $2 == "00:00:00:00:00:00"
iface[cint][:addresses] = Mash.new unless iface[cint][:addresses]
iface[cint][:addresses][$2.upcase] = { "family" => "lladdr" }
end
end
if line =~ /inet (\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})(\/(\d{1,2}))?/
tmp_addr, tmp_prefix = $1, $3
tmp_prefix ||= "32"
original_int = nil
# Are we a formerly aliased interface?
if line =~ /#{cint}:(\d+)$/
sub_int = $1
alias_int = "#{cint}:#{sub_int}"
original_int = cint
cint = alias_int
end
iface[cint] = Mash.new unless iface[cint] # Create the fake alias interface if needed
iface[cint][:addresses] = Mash.new unless iface[cint][:addresses]
iface[cint][:addresses][tmp_addr] = { "family" => "inet", "prefixlen" => tmp_prefix }
iface[cint][:addresses][tmp_addr][:netmask] = IPAddr.new("255.255.255.255").mask(tmp_prefix.to_i).to_s
if line =~ /peer (\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/
iface[cint][:addresses][tmp_addr][:peer] = $1
end
if line =~ /brd (\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/
iface[cint][:addresses][tmp_addr][:broadcast] = $1
end
if line =~ /scope (\w+)/
iface[cint][:addresses][tmp_addr][:scope] = ($1.eql?("host") ? "Node" : $1.capitalize)
end
# If we found we were an an alias interface, restore cint to its original value
cint = original_int unless original_int.nil?
end
if line =~ /inet6 ([a-f0-9\:]+)\/(\d+) scope (\w+)/
iface[cint][:addresses] = Mash.new unless iface[cint][:addresses]
tmp_addr = $1
iface[cint][:addresses][tmp_addr] = { "family" => "inet6", "prefixlen" => $2, "scope" => ($3.eql?("host") ? "Node" : $3.capitalize) }
end
end
so = shell_out("ip -d -s link")
tmp_int = nil
on_rx = true
so.stdout.lines do |line|
if line =~ IPROUTE_INT_REGEX
tmp_int = $2
iface[tmp_int] = Mash.new unless iface[tmp_int]
net_counters[tmp_int] = Mash.new unless net_counters[tmp_int]
end
if line =~ /(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)/
int = on_rx ? :rx : :tx
net_counters[tmp_int][int] = Mash.new unless net_counters[tmp_int][int]
net_counters[tmp_int][int][:bytes] = $1
net_counters[tmp_int][int][:packets] = $2
net_counters[tmp_int][int][:errors] = $3
net_counters[tmp_int][int][:drop] = $4
if(int == :rx)
net_counters[tmp_int][int][:overrun] = $5
else
net_counters[tmp_int][int][:carrier] = $5
net_counters[tmp_int][int][:collisions] = $6
end
on_rx = !on_rx
end
if line =~ /qlen (\d+)/
net_counters[tmp_int][:tx] = Mash.new unless net_counters[tmp_int][:tx]
net_counters[tmp_int][:tx][:queuelen] = $1
end
if line =~ /vlan id (\d+)/ or line =~ /vlan protocol ([\w\.]+) id (\d+)/
if $2
tmp_prot = $1
tmp_id = $2
else
tmp_id = $1
end
iface[tmp_int][:vlan] = Mash.new unless iface[tmp_int][:vlan]
iface[tmp_int][:vlan][:id] = tmp_id
iface[tmp_int][:vlan][:protocol] = tmp_prot if tmp_prot
vlan_flags = line.scan(/(REORDER_HDR|GVRP|LOOSE_BINDING)/)
if vlan_flags.length > 0
iface[tmp_int][:vlan][:flags] = vlan_flags.flatten.uniq
end
end
if line =~ /state (\w+)/
iface[tmp_int]['state'] = $1.downcase
end
end
families.each do |family|
neigh_attr = family[:neighbour_attribute]
default_prefix = family[:default_prefix]
so = shell_out("ip -f #{family[:name]} neigh show")
so.stdout.lines do |line|
if line =~ /^([a-f0-9\:\.]+)\s+dev\s+([^\s]+)\s+lladdr\s+([a-fA-F0-9\:]+)/
unless iface[$2]
Ohai::Log.warn("neighbour list has entries for unknown interface #{iface[$2]}")
next
end
iface[$2][neigh_attr] = Mash.new unless iface[$2][neigh_attr]
iface[$2][neigh_attr][$1] = $3.downcase
end
end
# checking the routing tables
# why ?
# 1) to set the default gateway and default interfaces attributes
# 2) on some occasions, the best way to select node[:ipaddress] is to look at
# the routing table source field.
# 3) and since we're at it, let's populate some :routes attributes
# (going to do that for both inet and inet6 addresses)
so = shell_out("ip -o -f #{family[:name]} route show")
so.stdout.lines do |line|
line.strip!
Ohai::Log.debug("Parsing #{line}")
if line =~ /\\/
parts = line.split('\\')
route_dest = parts.shift.strip
route_endings = parts
elsif line =~ /^([^\s]+)\s(.*)$/
route_dest = $1
route_endings = [$2]
else
next
end
route_endings.each do |route_ending|
if route_ending =~ /\bdev\s+([^\s]+)\b/
route_int = $1
else
Ohai::Log.debug("Skipping route entry without a device: '#{line}'")
next
end
unless iface[route_int]
Ohai::Log.debug("Skipping previously unseen interface from 'ip route show': #{route_int}")
next
end
route_entry = Mash.new( :destination => route_dest,
:family => family[:name] )
%w[via scope metric proto src].each do |k|
route_entry[k] = $1 if route_ending =~ /\b#{k}\s+([^\s]+)\b/
end
# a sanity check, especially for Linux-VServer, OpenVZ and LXC:
# don't report the route entry if the src address isn't set on the node
next if route_entry[:src] and not iface[route_int][:addresses].has_key? route_entry[:src]
iface[route_int][:routes] = Array.new unless iface[route_int][:routes]
iface[route_int][:routes] << route_entry
end
end
# now looking at the routes to set the default attributes
# for information, default routes can be of this form :
# - default via 10.0.2.4 dev br0
# - default dev br0 scope link
# - default via 10.0.3.1 dev eth1 src 10.0.3.2 metric 10
# - default via 10.0.4.1 dev eth2 src 10.0.4.2 metric 20
# using a temporary var to hold routes and their interface name
routes = iface.collect do |i,iv|
iv[:routes].collect do |r|
r.merge(:dev=>i) if r[:family] == family[:name]
end.compact if iv[:routes]
end.compact.flatten
# using a temporary var to hold the default route
# in case there are more than 1 default route, sort it by its metric
# and return the first one
# (metric value when unspecified is 0)
default_route = routes.select do |r|
r[:destination] == "default"
end.sort do |x,y|
(x[:metric].nil? ? 0 : x[:metric].to_i) <=> (y[:metric].nil? ? 0 : y[:metric].to_i)
end.first
if default_route.nil? or default_route.empty?
Ohai::Log.debug("Unable to determine default #{family[:name]} interface")
else
network["#{default_prefix}_interface"] = default_route[:dev]
Ohai::Log.debug("#{default_prefix}_interface set to #{default_route[:dev]}")
# setting gateway to 0.0.0.0 or :: if the default route is a link level one
network["#{default_prefix}_gateway"] = default_route[:via] ? default_route[:via] : family[:default_route].chomp("/0")
Ohai::Log.debug("#{default_prefix}_gateway set to #{network["#{default_prefix}_gateway"]}")
# since we're at it, let's populate {ip,mac,ip6}address with the best values
# using the source field when it's specified :
# 1) in the default route
# 2) in the route entry used to reach the default gateway
route = routes.select do |r|
# selecting routes
r[:src] and # it has a src field
iface[r[:dev]] and # the iface exists
iface[r[:dev]][:addresses].has_key? r[:src] and # the src ip is set on the node
iface[r[:dev]][:addresses][r[:src]][:scope].downcase != "link" and # this isn't a link level addresse
( r[:destination] == "default" or
( default_route[:via] and # the default route has a gateway
IPAddress(r[:destination]).include? IPAddress(default_route[:via]) # the route matches the gateway
)
)
end.sort_by do |r|
# sorting the selected routes:
# - getting default routes first
# - then sort by metric
# - then by prefixlen
[
r[:destination] == "default" ? 0 : 1,
r[:metric].nil? ? 0 : r[:metric].to_i,
# for some reason IPAddress doesn't accept "::/0", it doesn't like prefix==0
# just a quick workaround: use 0 if IPAddress fails
begin
IPAddress( r[:destination] == "default" ? family[:default_route] : r[:destination] ).prefix
rescue
0
end
]
end.first
unless route.nil? or route.empty?
if family[:name] == "inet"
ipaddress route[:src]
macaddress iface[route[:dev]][:addresses].select{|k,v| v["family"]=="lladdr"}.first.first unless iface[route[:dev]][:flags].include? "NOARP"
else
ip6address route[:src]
end
end
end
end
else
begin
so = shell_out("route -n")
route_result = so.stdout.split($/).grep( /^0.0.0.0/ )[0].split( /[ \t]+/ )
network[:default_gateway], network[:default_interface] = route_result.values_at(1,7)
rescue Ohai::Exceptions::Exec
Ohai::Log.debug("Unable to determine default interface")
end
so = shell_out("ifconfig -a")
cint = nil
so.stdout.lines do |line|
tmp_addr = nil
# dev_valid_name in the kernel only excludes slashes, nulls, spaces
# http://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git;a=blob;f=net/core/dev.c#l851
if line =~ /^([0-9a-zA-Z@\.\:\-_]+)\s+/
cint = $1
iface[cint] = Mash.new
if cint =~ /^(\w+)(\d+.*)/
iface[cint][:type] = $1
iface[cint][:number] = $2
end
end
if line =~ /Link encap:(Local Loopback)/ || line =~ /Link encap:(.+?)\s/
iface[cint][:encapsulation] = linux_encaps_lookup($1)
end
if line =~ /HWaddr (.+?)\s/
iface[cint][:addresses] = Mash.new unless iface[cint][:addresses]
iface[cint][:addresses][$1] = { "family" => "lladdr" }
end
if line =~ /inet addr:(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/
iface[cint][:addresses] = Mash.new unless iface[cint][:addresses]
iface[cint][:addresses][$1] = { "family" => "inet" }
tmp_addr = $1
end
if line =~ /inet6 addr: ([a-f0-9\:]+)\/(\d+) Scope:(\w+)/
iface[cint][:addresses] = Mash.new unless iface[cint][:addresses]
iface[cint][:addresses][$1] = { "family" => "inet6", "prefixlen" => $2, "scope" => ($3.eql?("Host") ? "Node" : $3) }
end
if line =~ /Bcast:(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/
iface[cint][:addresses][tmp_addr]["broadcast"] = $1
end
if line =~ /Mask:(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/
iface[cint][:addresses][tmp_addr]["netmask"] = $1
end
flags = line.scan(/(UP|BROADCAST|DEBUG|LOOPBACK|POINTTOPOINT|NOTRAILERS|RUNNING|NOARP|PROMISC|ALLMULTI|SLAVE|MASTER|MULTICAST|DYNAMIC)\s/)
if flags.length > 1
iface[cint][:flags] = flags.flatten
end
if line =~ /MTU:(\d+)/
iface[cint][:mtu] = $1
end
if line =~ /P-t-P:(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/
iface[cint][:peer] = $1
end
if line =~ /RX packets:(\d+) errors:(\d+) dropped:(\d+) overruns:(\d+) frame:(\d+)/
net_counters[cint] = Mash.new unless net_counters[cint]
net_counters[cint][:rx] = { "packets" => $1, "errors" => $2, "drop" => $3, "overrun" => $4, "frame" => $5 }
end
if line =~ /TX packets:(\d+) errors:(\d+) dropped:(\d+) overruns:(\d+) carrier:(\d+)/
net_counters[cint][:tx] = { "packets" => $1, "errors" => $2, "drop" => $3, "overrun" => $4, "carrier" => $5 }
end
if line =~ /collisions:(\d+)/
net_counters[cint][:tx]["collisions"] = $1
end
if line =~ /txqueuelen:(\d+)/
net_counters[cint][:tx]["queuelen"] = $1
end
if line =~ /RX bytes:(\d+) \((\d+?\.\d+ .+?)\)/
net_counters[cint][:rx]["bytes"] = $1
end
if line =~ /TX bytes:(\d+) \((\d+?\.\d+ .+?)\)/
net_counters[cint][:tx]["bytes"] = $1
end
end
so = shell_out("arp -an")
so.stdout.lines do |line|
if line =~ /^\S+ \((\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})\) at ([a-fA-F0-9\:]+) \[(\w+)\] on ([0-9a-zA-Z\.\:\-]+)/
next unless iface[$4] # this should never happen
iface[$4][:arp] = Mash.new unless iface[$4][:arp]
iface[$4][:arp][$1] = $2.downcase
end
end
end
counters[:network][:interfaces] = net_counters
network["interfaces"] = iface
end
end
|