* luci/statistics: let rrdtool.lua use values from the configuration, added irq diagr...
[project/luci.git] / applications / luci-statistics / luasrc / statistics / rrdtool.lua
1 module("luci.statistics.rrdtool", package.seeall)
2
3 require("luci.statistics.datatree")
4 require("luci.statistics.rrdtool.colors")
5 require("luci.statistics.rrdtool.definitions")
6 require("luci.statistics.i18n")
7 require("luci.model.uci")
8 require("luci.util")
9 require("luci.sys")
10 require("luci.fs")
11
12
13 Graph = luci.util.class()
14
15 function Graph.__init__( self, timespan, opts )
16
17         opts = opts or { }
18
19         local uci = luci.model.uci.Session()
20         local sections, names = uci:sections( "luci_statistics" )
21
22         -- helper classes
23         self.colors = luci.statistics.rrdtool.colors.Instance()
24         self.defs   = luci.statistics.rrdtool.definitions.Instance()
25         self.tree   = luci.statistics.datatree.Instance()
26         self.i18n   = luci.statistics.i18n.Instance( self )
27
28         -- options
29         opts.rrasingle = opts.rrasingle or ( sections.collectd_rrdtool.RRASingle ~= "0" )
30         opts.host      = opts.host      or sections.collectd.Hostname        or luci.sys.hostname()
31         opts.timespan  = opts.timespan  or sections.rrdtool.default_timespan or 900
32         opts.width     = opts.width     or sections.rrdtool.image_width      or 400
33         opts.rrdpath   = opts.rrdpath   or sections.collectd_rrdtool.DataDir or "/tmp/rrd"
34         opts.imgpath   = opts.imgpath   or sections.rrdtool.image_path       or "/tmp/rrdimg"
35         opts.rrdpath   = opts.rrdpath:gsub("/$","")
36         opts.imgpath   = opts.imgpath:gsub("/$","")
37
38         -- rrdtool default args
39         self.args = {
40                 "-a", "PNG",
41                 "-s", "NOW-" .. opts.timespan,
42                 "-w", opts.width
43         }
44
45         -- store options
46         self.opts = opts
47 end
48
49 function Graph._mkpath( self, plugin, plugin_instance, dtype, dtype_instance )
50         local t = self.opts.host .. "/" .. plugin
51         if type(plugin_instance) == "string" and plugin_instance:len() > 0 then
52                 t = t .. "-" .. plugin_instance
53         end
54         t = t .. "/" .. dtype
55         if type(dtype_instance) == "string" and dtype_instance:len() > 0 then
56                 t = t .. "-" .. dtype_instance
57         end
58         return t
59 end
60
61 function Graph.mkrrdpath( self, ... )
62         return string.format( "%s/%s.rrd", self.opts.rrdpath, self:_mkpath( ... ) )
63 end
64
65 function Graph.mkpngpath( self, ... )
66         return string.format( "%s/%s.png", self.opts.imgpath, self:_mkpath( ... ) )
67 end
68
69 function Graph.strippngpath( self, path )
70         return path:sub( self.opts.imgpath:len() + 2 )
71 end
72
73 function Graph.mktitle( self, plugin, plugin_instance, dtype, dtype_instance )
74
75         -- try various strings to retrieve a diagram title from the langfile
76         return "XXX"
77 end
78
79 function Graph._forcelol( self, list )
80         if type(list[1]) ~= "table" then
81                 return( { list } )
82         end
83         return( list )
84 end
85
86 function Graph._rrdtool( self, def, rrd )
87
88         -- prepare directory
89         local dir = def[1]:gsub("/[^/]+$","")
90         luci.fs.mkdir( dir, true )
91
92         -- construct commandline
93         local cmdline = "rrdtool graph"
94
95         -- copy default arguments to def stack
96         for i, opt in ipairs(self.args) do
97                 table.insert( def, 1 + i, opt )
98         end
99
100         -- construct commandline from def stack
101         for i, opt in ipairs(def) do
102                 opt = opt .. ""    -- force string
103                 
104                 if rrd then
105                         opt = opt:gsub( "{file}", rrd )
106                 end
107
108                 if opt:match("[^%w]") then
109                         cmdline = cmdline .. " '" .. opt .. "'"
110                 else
111                         cmdline = cmdline .. " " .. opt
112                 end
113         end
114
115         -- execute rrdtool
116         local rrdtool = io.popen( cmdline )
117         rrdtool:close()
118 end
119
120 function Graph._generic( self, opts, plugin, plugin_instance, dtype, index )
121
122         -- generated graph defs
123         local defs = { }
124
125         -- internal state variables
126         local _args         = { }
127         local _sources      = { }
128         local _stack_neg    = { }
129         local _stack_pos    = { }
130         local _longest_name = 0
131         local _has_totals   = false
132
133         -- some convenient aliases
134         local _ti           = table.insert
135         local _sf           = string.format
136
137         -- local helper: append a string.format() formatted string to given table
138         function _tif( list, fmt, ... )
139                 table.insert( list, string.format( fmt, ... ) )
140         end
141
142         -- local helper: create definitions for min, max, avg and create *_nnl (not null) variable from avg
143         function __def(source)
144
145                 local inst = source.sname
146                 local rrd  = source.rrd
147                 local ds   = source.ds
148
149                 if not ds or ds:len() == 0 then ds = "value" end
150
151                 _tif( _args, "DEF:%s_avg=%s:%s:AVERAGE", inst, rrd, ds )
152
153                 if not self.opts.rrasingle then
154                         _tif( _args, "DEF:%s_min=%s:%s:MIN", inst, rrd, ds )
155                         _tif( _args, "DEF:%s_max=%s:%s:MAX", inst, rrd, ds )
156                 end
157
158                 _tif( _args, "CDEF:%s_nnl=%s_avg,UN,0,%s_avg,IF", inst, inst, inst )
159         end
160
161         -- local helper: create cdefs depending on source options like flip and overlay
162         function __cdef(source)
163
164                 local prev
165
166                 -- find previous source, choose stack depending on flip state
167                 if source.flip then
168                         prev = _stack_neg[#_stack_neg]
169                 else
170                         prev = _stack_pos[#_stack_pos]
171                 end
172
173                 -- is first source in stack or overlay source: source_stk = source_nnl
174                 if not prev or source.overlay then
175                         -- create cdef statement
176                         _tif( _args, "CDEF:%s_stk=%s_nnl", source.sname, source.sname )
177
178                 -- is subsequent source without overlay: source_stk = source_nnl + previous_stk
179                 else
180                         -- create cdef statement                                
181                         _tif( _args, "CDEF:%s_stk=%s_nnl,%s_stk,+", source.sname, source.sname, prev )
182                 end
183
184                 -- create multiply by minus one cdef if flip is enabled
185                 if source.flip then
186
187                         -- create cdef statement: source_stk = source_stk * -1
188                         _tif( _args, "CDEF:%s_neg=%s_stk,-1,*", source.sname, source.sname )
189
190                         -- push to negative stack if overlay is disabled
191                         if not source.overlay then
192                                 _ti( _stack_neg, source.sname )
193                         end
194
195                 -- no flipping, push to positive stack if overlay is disabled
196                 elseif not source.overlay then
197
198                         -- push to positive stack
199                         _ti( _stack_pos, source.sname )
200                 end
201
202                 -- calculate total amount of data if requested
203                 if source.total then
204                         _tif( _args,
205                                 "CDEF:%s_avg_sample=%s_avg,UN,0,%s_avg,IF,sample_len,*",
206                                 source.sname, source.sname, source.sname
207                         )
208
209                         _tif( _args,
210                                 "CDEF:%s_avg_sum=PREV,UN,0,PREV,IF,%s_avg_sample,+",
211                                 source.sname, source.sname, source.sname
212                         )
213                 end
214         end
215
216         -- local helper: create cdefs required for calculating total values
217         function __cdef_totals()
218                 if _has_totals then
219                         _tif( _args, "CDEF:mytime=%s_avg,TIME,TIME,IF", _sources[1].sname    )
220                         _ti(  _args, "CDEF:sample_len_raw=mytime,PREV(mytime),-"             )
221                         _ti(  _args, "CDEF:sample_len=sample_len_raw,UN,0,sample_len_raw,IF" )
222                 end
223         end
224
225         -- local helper: create line and area statements
226         function __line(source)
227
228                 local line_color
229                 local area_color
230                 local legend
231                 local var
232
233                 -- find colors: try source, then opts.colors; fall back to random color
234                 if type(source.color) == "string" then
235                         line_color = source.color
236                         area_color = self.colors:from_string( line_color )
237                 elseif type(opts.colors[source.name:gsub("[^%w]","_")]) == "string" then
238                         line_color = opts.colors[source.name:gsub("[^%w]","_")]
239                         area_color = self.colors:from_string( line_color )
240                 else
241                         area_color = self.colors:random()
242                         line_color = self.colors:to_string( area_color )
243                 end
244
245                 -- derive area background color from line color
246                 area_color = self.colors:to_string( self.colors:faded( area_color ) )
247
248                 -- choose source_stk or source_neg variable depending on flip state
249                 if source.flip then
250                         var = "neg"
251                 else
252                         var = "stk"
253                 end
254
255                 -- create legend
256                 legend = _sf( "%-" .. _longest_name .. "s", source.title )
257
258                 -- create area if not disabled
259                 if not source.noarea then
260                         _tif( _args, "AREA:%s_%s#%s", source.sname, var, area_color )
261                 end
262
263                 -- create line1 statement
264                 _tif( _args, "LINE1:%s_%s#%s:%s", source.sname, var, line_color, legend )
265         end
266
267         -- local helper: create gprint statements
268         function __gprint(source)
269
270                 local numfmt = opts.number_format or "%6.1lf"
271                 local totfmt = opts.totals_format or "%5.1lf%s"
272
273                 -- don't include MIN if rrasingle is enabled
274                 if not self.opts.rrasingle then
275                         _tif( _args, "GPRINT:%s_min:MIN:%s Min", source.sname, numfmt )
276                 end
277
278                 -- always include AVERAGE
279                 _tif( _args, "GPRINT:%s_avg:AVERAGE:%s Avg", source.sname, numfmt )
280
281                 -- don't include MAX if rrasingle is enabled
282                 if not self.opts.rrasingle then
283                         _tif( _args, "GPRINT:%s_max:MAX:%s Max", source.sname, numfmt )
284                 end
285
286                 -- include total count if requested else include LAST
287                 if source.total then
288                         _tif( _args, "GPRINT:%s_avg_sum:LAST:(ca. %s Total)\\l", source.sname, totfmt )
289                 else
290                         _tif( _args, "GPRINT:%s_avg:LAST:%s Last\\l", source.sname, numfmt )
291                 end
292         end
293
294
295         --
296         -- find all data sources
297         --
298
299         -- find data types
300         local data_types
301
302         if dtype then
303                 data_types = { dtype }
304         else
305                 data_types = opts.data.types or { }
306         end
307
308         if not ( dtype or opts.data.types ) then
309                 if opts.data.instances then
310                         for k, v in pairs(opts.data.instances) do
311                                 _ti( data_types, k )
312                         end
313                 elseif opts.data.sources then
314                         for k, v in pairs(opts.data.sources) do
315                                 _ti( data_types, k )
316                         end
317                 end
318         end
319
320
321         -- iterate over data types
322         for i, dtype in ipairs(data_types) do
323
324                 -- find instances
325
326                 local data_instances
327
328                 if not opts.per_instance then
329                         if type(opts.data.instances) == "table" and type(opts.data.instances[dtype]) == "table" then
330                                 data_instances = opts.data.instances[dtype]
331                         else
332                                 data_instances = self.tree:data_instances( plugin, plugin_instance, dtype )
333                         end
334                 end
335
336                 if type(data_instances) ~= "table" or #data_instances == 0 then data_instances = { "" } end
337
338
339                 -- iterate over data instances
340                 for i, dinst in ipairs(data_instances) do
341
342                         -- construct combined data type / instance name
343                         local dname = dtype
344
345                         if dinst:len() > 0 then
346                                 dname = dname .. "_" .. dinst
347                         end
348
349
350                         -- find sources
351                         local data_sources = { "value" }
352
353                         if type(opts.data.sources) == "table" then
354                                 if type(opts.data.sources[dname]) == "table" then
355                                         data_sources = opts.data.sources[dname]
356                                 elseif type(opts.data.sources[dtype]) == "table" then
357                                         data_sources = opts.data.sources[dtype]
358                                 end
359                         end
360
361
362                         -- iterate over data sources
363                         for i, dsource in ipairs(data_sources) do
364
365                                 local dsname  = dtype .. "_" .. dinst:gsub("[^%w]","_") .. "_" .. dsource
366                                 local altname = dtype .. "__" .. dsource
367
368                                 -- find datasource options
369                                 local dopts = { }
370
371                                 if type(opts.data.options) == "table" then
372                                         if type(opts.data.options[dsname]) == "table" then
373                                                 dopts = opts.data.options[dsname]
374                                         elseif type(opts.data.options[altname]) == "table" then
375                                                 dopts = opts.data.options[altname]
376                                         elseif type(opts.data.options[dname]) == "table" then
377                                                 dopts = opts.data.options[dname]
378                                         elseif type(opts.data.options[dtype]) == "table" then
379                                                 dopts = opts.data.options[dtype]
380                                         end
381                                 end
382
383
384                                 -- store values
385                                 _ti( _sources, {
386                                         rrd      = dopts.rrd     or self:mkrrdpath( plugin, plugin_instance, dtype, dinst ),
387                                         color    = dopts.color   or self.colors:to_string( self.colors:random() ),
388                                         flip     = dopts.flip    or false,
389                                         total    = dopts.total   or false,
390                                         overlay  = dopts.overlay or false,
391                                         noarea   = dopts.noarea  or false,
392                                         ds       = dsource,
393                                         type     = dtype,
394                                         instance = dinst,
395                                         index    = #_sources + 1,
396                                         sname    = ( #_sources + 1 ) .. dtype
397                                 } )
398
399
400                                 -- generate datasource title
401                                 _sources[#_sources].title = self.i18n:ds( _sources[#_sources] )
402
403
404                                 -- find longest name ...
405                                 if _sources[#_sources].title:len() > _longest_name then
406                                         _longest_name = _sources[#_sources].title:len()
407                                 end
408
409
410                                 -- has totals?
411                                 if _sources[#_sources].total then
412                                         _has_totals = true
413                                 end
414                         end
415                 end
416         end
417
418
419         --
420         -- construct diagrams
421         --
422
423         -- if per_instance is enabled then find all instances from the first datasource in diagram
424         -- if per_instance is disabled then use an empty pseudo instance and use model provided values
425         local instances = { "" }
426
427         if opts.per_instance then
428                 instances = self.tree:data_instances( plugin, plugin_instance, _sources[1].type )
429         end
430
431
432         -- iterate over instances
433         for i, instance in ipairs(instances) do
434
435                 -- store title and vlabel
436                 _ti( _args, "-t" )
437                 _ti( _args, opts.title  or self.i18n:title( plugin, plugin_instance, _sources[1].type, instance ) )
438                 _ti( _args, "-v" )
439                 _ti( _args, opts.vlabel or self.i18n:label( plugin, plugin_instance, _sources[1].type, instance ) )
440
441                 -- store additional rrd options
442                 if opts.rrdopts then
443                         for i, o in ipairs(opts.rrdopts) do _ti( _args, o ) end
444                 end
445
446
447                 -- create DEF statements for each instance
448                 for i, source in ipairs(_sources) do
449                         -- fixup properties for per instance mode...
450                         if opts.per_instance then
451                                 source.instance = instance
452                                 source.rrd      = self:mkrrdpath( plugin, plugin_instance, source.type, instance )
453                         end
454
455                         __def( source )
456                 end
457
458                 -- create CDEF required for calculating totals
459                 __cdef_totals()
460
461                 -- create CDEF statements for each instance in reversed order
462                 for i, source in ipairs(_sources) do
463                         __cdef( _sources[1 + #_sources - i] )
464                 end
465
466                 -- create LINE1, AREA and GPRINT statements for each instance
467                 for i, source in ipairs(_sources) do
468                         __line( source )
469                         __gprint( source )
470                 end
471
472                 -- prepend image path to arg stack
473                 _ti( _args, 1, self:mkpngpath( plugin, plugin_instance, index .. instance ) )
474
475                 -- push arg stack to definition list
476                 _ti( defs, _args )
477
478                 -- reset stacks
479                 _args         = { }
480                 _stack_pos    = { }
481                 _stack_neg    = { }
482         end
483
484         return defs
485 end
486
487 function Graph.render( self, plugin, plugin_instance )
488
489         dtype_instances = dtype_instances or { "" }
490         local pngs = { }
491
492         -- check for a whole graph handler
493         local plugin_def = "luci.statistics.rrdtool.definitions." .. plugin
494         local stat, def = pcall( require, plugin_def )
495
496         if stat and def and type(def.rrdargs) == "function" then
497
498                 -- temporary image matrix
499                 local _images = { }
500
501                 -- get diagram definitions
502                 for i, opts in ipairs( self:_forcelol( def.rrdargs( self, plugin, plugin_instance ) ) ) do
503
504                         _images[i] = { }
505
506                         -- get diagram definition instances
507                         local diagrams = self:_generic( opts, plugin, plugin_instance, nil, i )
508
509                         -- render all diagrams
510                         for j, def in ipairs( diagrams ) do
511
512                                 -- remember image
513                                 _images[i][j] = def[1]
514
515                                 -- exec
516                                 self:_rrdtool( def )
517                         end
518                 end
519
520                 -- remember images - XXX: fixme (will cause probs with asymmetric data)
521                 for y = 1, #_images[1] do
522                         for x = 1, #_images do
523                                 table.insert( pngs, _images[x][y] )
524                         end
525                 end
526         else
527
528                 -- no graph handler, iterate over data types
529                 for i, dtype in ipairs( self.tree:data_types( plugin, plugin_instance ) ) do
530
531                         -- check for data type handler
532                         local dtype_def = plugin_def .. "." .. dtype
533                         local stat, def = pcall( require, dtype_def )
534
535                         if stat and def and type(def.rrdargs) == "function" then
536
537                                 -- temporary image matrix
538                                 local _images = { }
539
540                                 -- get diagram definitions
541                                 for i, opts in ipairs( self:_forcelol( def.rrdargs( self, plugin, plugin_instance, dtype ) ) ) do
542
543                                         _images[i] = { }
544
545                                         -- get diagram definition instances
546                                         local diagrams = self:_generic( opts, plugin, plugin_instance, dtype, i )
547
548                                         -- render all diagrams
549                                         for j, def in ipairs( diagrams ) do
550
551                                                 -- remember image
552                                                 _images[i][j] = def[1]
553
554                                                 -- exec
555                                                 self:_rrdtool( def )
556                                         end
557                                 end
558
559                                 -- remember images - XXX: fixme (will cause probs with asymmetric data)
560                                 for y = 1, #_images[1] do
561                                         for x = 1, #_images do
562                                                 table.insert( pngs, _images[x][y] )
563                                         end
564                                 end
565                         else
566
567                                 -- no data type handler, fall back to builtin definition
568                                 if type(self.defs.definitions[dtype]) == "table" then
569
570                                         -- iterate over data type instances
571                                         for i, inst in ipairs( self.tree:data_instances( plugin, plugin_instance, dtype ) ) do
572
573                                                 local title = self:mktitle( plugin, plugin_instance, dtype, inst )
574                                                 local png   = self:mkpngpath( plugin, plugin_instance, dtype, inst )
575                                                 local rrd   = self:mkrrdpath( plugin, plugin_instance, dtype, inst )
576                                                 local args  = { png, "-t", title }
577                                                 
578                                                 for i, o in ipairs(self.defs.definitions[dtype]) do
579                                                         table.insert( args, o )
580                                                 end
581
582                                                 -- remember image
583                                                 table.insert( pngs, png )
584
585                                                 -- exec
586                                                 self:_rrdtool( args, rrd )
587                                         end
588                                 end
589                         end
590                 end
591         end
592
593         return pngs
594 end