Class: GRI::SNMPCollector

Inherits:
Collector show all
Defined in:
lib/gri/collector.rb

Constant Summary collapse

SYSOIDS = 
BER.enc_oid_list(['sysDescr', 'sysName', 'sysObjectID',
'sysUpTime', 'sysLocation'].map {|n|
oid = SNMP::OIDS[n] + '.0'
SNMP.add_oid n + '.0', oid
oid})

Constants inherited from Collector

Collector::TYPES

Instance Attribute Summary

Attributes inherited from Collector

#attached_at, #host, #interval, #loop, #options, #timeout

Instance Method Summary collapse

Methods inherited from Collector

#attach, create, #initialize, #on_error, #on_init, #on_retry

Constructor Details

This class inherits a constructor from GRI::Collector

Instance Method Details

#get(varbind, &cb) ⇒ Object 



271
272
273
274
275
276
277
278
279
280
281
282
 
# File 'lib/gri/collector.rb', line 271

def get varbind, &cb
  @results.clear
  @retry_count = 0
  @poll_cb = cb
  @snmp.connect unless @snmp.sock
  @snmp.get_start(varbind) {|*res| @results.push res}
  send_req varbind
rescue SocketError => e
  @loop.detach self
  @on_error.call if @on_error
  Log.error "#{host}: error: #{e.to_s}"
end

#key_encode(s) ⇒ Object 



185
186
187
188
 
# File 'lib/gri/collector.rb', line 185

def key_encode s
  s.to_s.gsub(/[:\/]/, '-').gsub(/[ =]/, '_').gsub(/[^-a-zA-Z0-9_.]/) { #/
    "%02X"%$&.unpack('C').first}
end

#on_attach ⇒ Object 



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
 
# File 'lib/gri/collector.rb', line 73

def on_attach
  now = Time.now
  now_i = now.to_i
  @attached_at = now
  @results.clear
  @tout = 5
  @preq = nil
  @snmp = SNMP.new(@cname || @host, options['port'])
  if options['fake-snmp']
    require 'gri/fake_snmp'
    @snmp = FakeSNMP.new options['fake-snmp']
  else
    @snmp.version = options['ver'] if options['ver']
    @snmp.community = options['community'] if options['community']
  end

  varbind = SYSOIDS
  get(varbind) {|results|
    sysinfo = {'_host'=>(@hostname || host),
      '_key'=>'SYS', '_time'=>now_i, '_mtime'=>now_i}
    results.each {|enoid, tag, val|
      (k = SNMP::ROIDS[enoid]) and sysinfo[k.sub(/\.0$/, '')] = val
    }
    sysinfo['sysDescr'] and sysinfo['sysDescr'].gsub!("\n", ' ')

    vendor = Vendor.check sysinfo, options
    if $debug
      puts "snmp: #{host} (#{vendor.name}): #{sysinfo['sysDescr']}"
      puts vendor.options.inspect
      printf "  elapsed %f sec\n", Time.now - @attached_at
    end

    @snmp.version = vendor.options['ver'] if vendor.options['ver']
    punits = vendor.get_punits
    punits_d = punits.dup
    @workhash = punits.inject({}) {|h, pu| h[pu.cat] = {}; h}
    poll1(punits) {
      printf "  elapsed %f sec\n", Time.now - @attached_at if $debug
      if !options.has_key?('SYS') or options['SYS']
        sysinfo.delete 'sysObjectID'
        records = [sysinfo]
      else
        records = []
      end
      hfdh = @fake_descr_hash[host]

      @workhash[:interfaces] = @workhash[''] #
      if $debug and ($debug['workhash'] or $debug['workhash0'])
        puts "  workhash0"
        show_workhash @workhash
      end
      for pu in punits_d
        pu.options = vendor.options
        join_cat, join_key = pu.defs[:join]
        if join_cat
          for cat, wh in @workhash[pu.cat]
            if wh and @workhash[join_cat]
              join_hash = @workhash[join_cat][wh[join_key]]
              wh.merge! join_hash if join_hash
            end
          end
        end
        puts "  fix_workhash #{pu.class} #{pu.name}" if $debug
        pu.fix_workhash @workhash
      end
      @workhash.delete :interfaces #
      if $debug and ($debug['workhash'] or $debug['workhash1'])
        puts "  workhash1"
        show_workhash @workhash
      end

      for cat, wh in @workhash
        if (specs = DEFS.get_specs cat)
          (index_key = specs[:index_key] || specs[:named_index])
        else
          specs = {}
        end
        ign_proc = specs[:ignore?]
        for ind, h in wh
          h['_host'] = @hostname || host
          h['_key'] = if index_key
                        next if h[index_key].to_s.empty?
                        "#{cat}_#{key_encode h[index_key]}"
                      elsif ind.kind_of? Integer
                        "#{cat}#{ind}"
                      elsif ind.kind_of? Array
                        "#{cat}_#{ind.join(',')}"
                      else
                        "#{cat}_#{ind}"
                      end
          h['_interval'] = @interval
          h['_time'] = now_i
          if hfdh and (f_descr = hfdh[h['_key']]) and
              (prop = specs[:prop]) and (descr_k = prop[:description])
            h[descr_k] = f_descr
          end
          next if ign_proc and ign_proc.call(h)
          records.push h
        end
      end
      printf "  elapsed %f sec\n", Time.now - @attached_at if $debug
      @cb.call records
      @loop.detach self
      printf "  elapsed %f sec\n", Time.now - @attached_at if $debug
    }
  }
end

#on_detach ⇒ Object 



181
182
183
 
# File 'lib/gri/collector.rb', line 181

def on_detach
  @snmp.close rescue nil
end

#on_readable(io = nil) ⇒ Object 



328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
 
# File 'lib/gri/collector.rb', line 328

def on_readable io=nil
  msg = @snmp.sock.recv 2000, 0
  arg = @snmp.recv_msg msg
  if arg
    @snmp.state = :SUCCESS if @snmp.state == :GET_REQ
  end
  if @snmp.state == :SUCCESS
    @preq = nil
    @poll_cb.call @results
  elsif @snmp.state != :IDLE
    send_req arg if arg
  end
rescue SystemCallError
  @snmp.state = :IDLE
  Log.error "#{@host}: ERROR: #{$!}"
  @loop.detach self
  @on_error.call if @on_error
end

#on_timeout ⇒ Object 



347
348
349
350
 
# File 'lib/gri/collector.rb', line 347

def on_timeout
  Log.error "#{@host}: ERROR: timeout"
  @on_error.call if @on_error
end

#on_writable(io = nil) ⇒ Object 



320
321
322
323
324
325
326
 
# File 'lib/gri/collector.rb', line 320

def on_writable io=nil
  unless @buffers.empty?
    @snmp.sock.send @buffers.join(''), 0
    @buffers.clear
    loop.watch @snmp.sock, :r, @tout, self
  end
end

#poll1(punits, &cb) ⇒ Object 



190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
 
# File 'lib/gri/collector.rb', line 190

def poll1 punits, &cb
  if punits.empty?
    cb.call
  else
    pu = punits.shift
    @get_oid_buf = []
    oids = pu.oids.dup
    if $debug
      t = Time.now
      puts "  poll #{host} #{pu.name}" if $debug['walk']
    end
    walk1(pu, oids) {
      if $debug and !$debug['walk']
        printf "  poll #{host} #{pu.name} (%f sec)\n", Time.now - t
      end
      poll1 punits, &cb
    }
  end
end

#retry ⇒ Object 



297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
 
# File 'lib/gri/collector.rb', line 297

def retry
  if (@retry_count += 1) > 3
    @loop.detach self
    @on_error.call if @on_error
    Log.error "#{host}: error"
  elsif @preq
    Log.warn "#{host}: retry #{@retry_count}"
    @on_retry.call if @on_retry
    if (s = @snmp.make_req(@snmp.state, @preq.last))
      @buffers.push s
      loop.watch @snmp.sock, :w, @tout, self
    else
      @loop.detach self
      @on_error.call if @on_error
      Log.error "#{host}: cannot retry: #{@retry_count}"
    end
  else
    @loop.detach self
    @on_error.call if @on_error
    Log.error "#{host}: cannot retry: #{@retry_count}"
  end
end

#send_req(arg) ⇒ Object 



284
285
286
287
288
289
290
291
292
293
294
295
 
# File 'lib/gri/collector.rb', line 284

def send_req arg
  @preq = [@snmp.state, arg]
  if (s = @snmp.make_req(@snmp.state, arg))
    if @retry_count > 0
      Log.debug "retry send_req, #{@buffers.size}"
    end
    @buffers.push s
    loop.watch @snmp.sock, :w, @tout, self
  else
    on_readable
  end
end

#show_results(req_enoid, results) ⇒ Object 



248
249
250
251
252
253
254
255
256
 
# File 'lib/gri/collector.rb', line 248

def show_results req_enoid, results
  puts "    req #{SNMP.enoid2name req_enoid}"
  for enoid, tag, val in results
    a = BER.dec_oid enoid
    s = a[0..-2].join('.')
    oid_ind = BER.enc_v_oid s
    puts "      res #{SNMP.enoid2name(enoid)} #{tag} #{val.inspect}"
  end
end

#show_workhash(workhash) ⇒ Object 



236
237
238
239
240
241
242
243
244
245
246
 
# File 'lib/gri/collector.rb', line 236

def show_workhash workhash
  for cat, wh in workhash
    puts "    cat: #{cat.inspect}"
    for ind, h in wh
      puts "      index: #{ind}"
      for k, v in h
        puts "        #{k}: #{v.inspect}"
      end
    end
  end
end

#sync? ⇒ Boolean

Returns:

  • (Boolean) 


71
 
# File 'lib/gri/collector.rb', line 71

def sync?; false; end

#walk(enoid, &cb) ⇒ Object 



258
259
260
261
262
263
264
265
266
267
268
269
 
# File 'lib/gri/collector.rb', line 258

def walk enoid, &cb
  @results.clear
  @retry_count = 0
  @poll_cb = cb
  @snmp.connect unless @snmp.sock
  @snmp.walk_start(enoid) {|*res| @results.push res}
  send_req enoid
rescue SocketError => e
  @loop.detach self
  @on_error.call if @on_error
  Log.error "#{host}: error: #{e.to_s}"
end

#walk1(pu, oids, &cb) ⇒ Object 



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
 
# File 'lib/gri/collector.rb', line 210

def walk1 pu, oids, &cb
  wh = @workhash[pu.cat]
  if oids.empty?
    if @get_oid_buf.empty?
      cb.call
    else
      varbind = BER.cat_enoid @get_oid_buf
      get(varbind) {|results|
        results.each {|enoid, tag, val| pu.feed wh, enoid, tag, val}
        cb.call
      }
    end
  else
    if (req_enoid = oids.shift) and req_enoid.getbyte(-1) == 0
      @get_oid_buf.push req_enoid
      walk1 pu, oids, &cb
    else
      walk(req_enoid) {|results|
        show_results req_enoid, results if $debug and $debug['walk']
        results.each {|enoid, tag, val| pu.feed wh, enoid, tag, val}
        walk1 pu, oids, &cb
      }
    end
  end
end