--[[ Luci statistics - rrdtool interface library / diagram model interpreter (c) 2008 Freifunk Leipzig / Jo-Philipp Wich 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 $Id$ ]]-- module("luci.statistics.rrdtool", package.seeall) require("luci.statistics.datatree") require("luci.statistics.rrdtool.colors") require("luci.statistics.rrdtool.definitions") require("luci.statistics.i18n") require("luci.model.uci") require("luci.util") require("luci.sys") require("luci.fs") Graph = luci.util.class() function Graph.__init__( self, timespan, opts ) opts = opts or { } local uci = luci.model.uci local sections = uci.get_all( "luci_statistics" ) -- helper classes self.colors = luci.statistics.rrdtool.colors.Instance() self.defs = luci.statistics.rrdtool.definitions.Instance() self.tree = luci.statistics.datatree.Instance() self.i18n = luci.statistics.i18n.Instance( self ) -- options opts.timespan = timespan or sections.rrdtool.default_timespan or 900 opts.rrasingle = opts.rrasingle or ( sections.collectd_rrdtool.RRASingle ~= "0" ) opts.host = opts.host or sections.collectd.Hostname or luci.sys.hostname() opts.width = opts.width or sections.rrdtool.image_width or 400 opts.rrdpath = opts.rrdpath or sections.collectd_rrdtool.DataDir or "/tmp/rrd" opts.imgpath = opts.imgpath or sections.rrdtool.image_path or "/tmp/rrdimg" opts.rrdpath = opts.rrdpath:gsub("/$","") opts.imgpath = opts.imgpath:gsub("/$","") -- rrdtool default args self.args = { "-a", "PNG", "-s", "NOW-" .. opts.timespan, "-w", opts.width } -- store options self.opts = opts end function Graph._mkpath( self, plugin, plugin_instance, dtype, dtype_instance ) local t = self.opts.host .. "/" .. plugin if type(plugin_instance) == "string" and plugin_instance:len() > 0 then t = t .. "-" .. plugin_instance end t = t .. "/" .. dtype if type(dtype_instance) == "string" and dtype_instance:len() > 0 then t = t .. "-" .. dtype_instance end return t end function Graph.mkrrdpath( self, ... ) return string.format( "%s/%s.rrd", self.opts.rrdpath, self:_mkpath( ... ) ) end function Graph.mkpngpath( self, ... ) return string.format( "%s/%s.%i.png", self.opts.imgpath, self:_mkpath( ... ), self.opts.timespan ) end function Graph.strippngpath( self, path ) return path:sub( self.opts.imgpath:len() + 2 ) end function Graph._forcelol( self, list ) if type(list[1]) ~= "table" then return( { list } ) end return( list ) end function Graph._rrdtool( self, def, rrd ) -- prepare directory local dir = def[1]:gsub("/[^/]+$","") luci.fs.mkdir( dir, true ) -- construct commandline local cmdline = "rrdtool graph" -- copy default arguments to def stack for i, opt in ipairs(self.args) do table.insert( def, 1 + i, opt ) end -- construct commandline from def stack for i, opt in ipairs(def) do opt = opt .. "" -- force string if rrd then opt = opt:gsub( "{file}", rrd ) end if opt:match("[^%w]") then cmdline = cmdline .. " '" .. opt .. "'" else cmdline = cmdline .. " " .. opt end end -- execute rrdtool local rrdtool = io.popen( cmdline ) rrdtool:close() end function Graph._generic( self, opts, plugin, plugin_instance, dtype, index ) -- generated graph defs local defs = { } -- internal state variables local _args = { } local _sources = { } local _stack_neg = { } local _stack_pos = { } local _longest_name = 0 local _has_totals = false -- some convenient aliases local _ti = table.insert local _sf = string.format -- local helper: append a string.format() formatted string to given table function _tif( list, fmt, ... ) table.insert( list, string.format( fmt, ... ) ) end -- local helper: create definitions for min, max, avg and create *_nnl (not null) variable from avg function __def(source) local inst = source.sname local rrd = source.rrd local ds = source.ds if not ds or ds:len() == 0 then ds = "value" end _tif( _args, "DEF:%s_avg=%s:%s:AVERAGE", inst, rrd, ds ) if not self.opts.rrasingle then _tif( _args, "DEF:%s_min=%s:%s:MIN", inst, rrd, ds ) _tif( _args, "DEF:%s_max=%s:%s:MAX", inst, rrd, ds ) end _tif( _args, "CDEF:%s_nnl=%s_avg,UN,0,%s_avg,IF", inst, inst, inst ) end -- local helper: create cdefs depending on source options like flip and overlay function __cdef(source) local prev -- find previous source, choose stack depending on flip state if source.flip then prev = _stack_neg[#_stack_neg] else prev = _stack_pos[#_stack_pos] end -- is first source in stack or overlay source: source_stk = source_nnl if not prev or source.overlay then -- create cdef statement _tif( _args, "CDEF:%s_stk=%s_nnl", source.sname, source.sname ) -- is subsequent source without overlay: source_stk = source_nnl + previous_stk else -- create cdef statement _tif( _args, "CDEF:%s_stk=%s_nnl,%s_stk,+", source.sname, source.sname, prev ) end -- create multiply by minus one cdef if flip is enabled if source.flip then -- create cdef statement: source_stk = source_stk * -1 _tif( _args, "CDEF:%s_neg=%s_stk,-1,*", source.sname, source.sname ) -- push to negative stack if overlay is disabled if not source.overlay then _ti( _stack_neg, source.sname ) end -- no flipping, push to positive stack if overlay is disabled elseif not source.overlay then -- push to positive stack _ti( _stack_pos, source.sname ) end -- calculate total amount of data if requested if source.total then _tif( _args, "CDEF:%s_avg_sample=%s_avg,UN,0,%s_avg,IF,sample_len,*", source.sname, source.sname, source.sname ) _tif( _args, "CDEF:%s_avg_sum=PREV,UN,0,PREV,IF,%s_avg_sample,+", source.sname, source.sname, source.sname ) end end -- local helper: create cdefs required for calculating total values function __cdef_totals() if _has_totals then _tif( _args, "CDEF:mytime=%s_avg,TIME,TIME,IF", _sources[1].sname ) _ti( _args, "CDEF:sample_len_raw=mytime,PREV(mytime),-" ) _ti( _args, "CDEF:sample_len=sample_len_raw,UN,0,sample_len_raw,IF" ) end end -- local helper: create line and area statements function __line(source) local line_color local area_color local legend local var -- find colors: try source, then opts.colors; fall back to random color if type(source.color) == "string" then line_color = source.color area_color = self.colors:from_string( line_color ) elseif type(opts.colors[source.name:gsub("[^%w]","_")]) == "string" then line_color = opts.colors[source.name:gsub("[^%w]","_")] area_color = self.colors:from_string( line_color ) else area_color = self.colors:random() line_color = self.colors:to_string( area_color ) end -- derive area background color from line color area_color = self.colors:to_string( self.colors:faded( area_color ) ) -- choose source_stk or source_neg variable depending on flip state if source.flip then var = "neg" else var = "stk" end -- create legend legend = _sf( "%-" .. _longest_name .. "s", source.title ) -- create area if not disabled if not source.noarea then _tif( _args, "AREA:%s_%s#%s", source.sname, var, area_color ) end -- create line1 statement _tif( _args, "LINE1:%s_%s#%s:%s", source.sname, var, line_color, legend ) end -- local helper: create gprint statements function __gprint(source) local numfmt = opts.number_format or "%6.1lf" local totfmt = opts.totals_format or "%5.1lf%s" -- don't include MIN if rrasingle is enabled if not self.opts.rrasingle then _tif( _args, "GPRINT:%s_min:MIN:%s Min", source.sname, numfmt ) end -- always include AVERAGE _tif( _args, "GPRINT:%s_avg:AVERAGE:%s Avg", source.sname, numfmt ) -- don't include MAX if rrasingle is enabled if not self.opts.rrasingle then _tif( _args, "GPRINT:%s_max:MAX:%s Max", source.sname, numfmt ) end -- include total count if requested else include LAST if source.total then _tif( _args, "GPRINT:%s_avg_sum:LAST:(ca. %s Total)\\l", source.sname, totfmt ) else _tif( _args, "GPRINT:%s_avg:LAST:%s Last\\l", source.sname, numfmt ) end end -- -- find all data sources -- -- find data types local data_types if dtype then data_types = { dtype } else data_types = opts.data.types or { } end if not ( dtype or opts.data.types ) then if opts.data.instances then for k, v in pairs(opts.data.instances) do _ti( data_types, k ) end elseif opts.data.sources then for k, v in pairs(opts.data.sources) do _ti( data_types, k ) end end end -- iterate over data types for i, dtype in ipairs(data_types) do -- find instances local data_instances if not opts.per_instance then if type(opts.data.instances) == "table" and type(opts.data.instances[dtype]) == "table" then data_instances = opts.data.instances[dtype] else data_instances = self.tree:data_instances( plugin, plugin_instance, dtype ) end end if type(data_instances) ~= "table" or #data_instances == 0 then data_instances = { "" } end -- iterate over data instances for i, dinst in ipairs(data_instances) do -- construct combined data type / instance name local dname = dtype if dinst:len() > 0 then dname = dname .. "_" .. dinst end -- find sources local data_sources = { "value" } if type(opts.data.sources) == "table" then if type(opts.data.sources[dname]) == "table" then data_sources = opts.data.sources[dname] elseif type(opts.data.sources[dtype]) == "table" then data_sources = opts.data.sources[dtype] end end -- iterate over data sources for i, dsource in ipairs(data_sources) do local dsname = dtype .. "_" .. dinst:gsub("[^%w]","_") .. "_" .. dsource local altname = dtype .. "__" .. dsource -- find datasource options local dopts = { } if type(opts.data.options) == "table" then if type(opts.data.options[dsname]) == "table" then dopts = opts.data.options[dsname] elseif type(opts.data.options[altname]) == "table" then dopts = opts.data.options[altname] elseif type(opts.data.options[dname]) == "table" then dopts = opts.data.options[dname] elseif type(opts.data.options[dtype]) == "table" then dopts = opts.data.options[dtype] end end -- store values _ti( _sources, { rrd = dopts.rrd or self:mkrrdpath( plugin, plugin_instance, dtype, dinst ), color = dopts.color or self.colors:to_string( self.colors:random() ), flip = dopts.flip or false, total = dopts.total or false, overlay = dopts.overlay or false, noarea = dopts.noarea or false, ds = dsource, type = dtype, instance = dinst, index = #_sources + 1, sname = ( #_sources + 1 ) .. dtype } ) -- generate datasource title _sources[#_sources].title = self.i18n:ds( _sources[#_sources] ) -- find longest name ... if _sources[#_sources].title:len() > _longest_name then _longest_name = _sources[#_sources].title:len() end -- has totals? if _sources[#_sources].total then _has_totals = true end end end end -- -- construct diagrams -- -- if per_instance is enabled then find all instances from the first datasource in diagram -- if per_instance is disabled then use an empty pseudo instance and use model provided values local instances = { "" } if opts.per_instance then instances = self.tree:data_instances( plugin, plugin_instance, _sources[1].type ) end -- iterate over instances for i, instance in ipairs(instances) do -- store title and vlabel _ti( _args, "-t" ) _ti( _args, opts.title or self.i18n:title( plugin, plugin_instance, _sources[1].type, instance ) ) _ti( _args, "-v" ) _ti( _args, opts.vlabel or self.i18n:label( plugin, plugin_instance, _sources[1].type, instance ) ) -- store additional rrd options if opts.rrdopts then for i, o in ipairs(opts.rrdopts) do _ti( _args, o ) end end -- create DEF statements for each instance for i, source in ipairs(_sources) do -- fixup properties for per instance mode... if opts.per_instance then source.instance = instance source.rrd = self:mkrrdpath( plugin, plugin_instance, source.type, instance ) end __def( source ) end -- create CDEF required for calculating totals __cdef_totals() -- create CDEF statements for each instance in reversed order for i, source in ipairs(_sources) do __cdef( _sources[1 + #_sources - i] ) end -- create LINE1, AREA and GPRINT statements for each instance for i, source in ipairs(_sources) do __line( source ) __gprint( source ) end -- prepend image path to arg stack _ti( _args, 1, self:mkpngpath( plugin, plugin_instance, index .. instance ) ) -- push arg stack to definition list _ti( defs, _args ) -- reset stacks _args = { } _stack_pos = { } _stack_neg = { } end return defs end function Graph.render( self, plugin, plugin_instance ) dtype_instances = dtype_instances or { "" } local pngs = { } -- check for a whole graph handler local plugin_def = "luci.statistics.rrdtool.definitions." .. plugin local stat, def = luci.util.copcall( require, plugin_def ) if stat and def and type(def.rrdargs) == "function" then -- temporary image matrix local _images = { } -- get diagram definitions for i, opts in ipairs( self:_forcelol( def.rrdargs( self, plugin, plugin_instance ) ) ) do _images[i] = { } -- get diagram definition instances local diagrams = self:_generic( opts, plugin, plugin_instance, nil, i ) -- render all diagrams for j, def in ipairs( diagrams ) do -- remember image _images[i][j] = def[1] -- exec self:_rrdtool( def ) end end -- remember images - XXX: fixme (will cause probs with asymmetric data) for y = 1, #_images[1] do for x = 1, #_images do table.insert( pngs, _images[x][y] ) end end else -- no graph handler, iterate over data types for i, dtype in ipairs( self.tree:data_types( plugin, plugin_instance ) ) do -- check for data type handler local dtype_def = plugin_def .. "." .. dtype local stat, def = luci.util.copcall( require, dtype_def ) if stat and def and type(def.rrdargs) == "function" then -- temporary image matrix local _images = { } -- get diagram definitions for i, opts in ipairs( self:_forcelol( def.rrdargs( self, plugin, plugin_instance, dtype ) ) ) do _images[i] = { } -- get diagram definition instances local diagrams = self:_generic( opts, plugin, plugin_instance, dtype, i ) -- render all diagrams for j, def in ipairs( diagrams ) do -- remember image _images[i][j] = def[1] -- exec self:_rrdtool( def ) end end -- remember images - XXX: fixme (will cause probs with asymmetric data) for y = 1, #_images[1] do for x = 1, #_images do table.insert( pngs, _images[x][y] ) end end else -- no data type handler, fall back to builtin definition if type(self.defs.definitions[dtype]) == "table" then -- iterate over data type instances for i, inst in ipairs( self.tree:data_instances( plugin, plugin_instance, dtype ) ) do local title = self.i18n:title( plugin, plugin_instance, dtype, inst ) local label = self.i18n:label( plugin, plugin_instance, dtype, inst ) local png = self:mkpngpath( plugin, plugin_instance, dtype, inst ) local rrd = self:mkrrdpath( plugin, plugin_instance, dtype, inst ) local args = { png, "-t", title, "-v", label } for i, o in ipairs(self.defs.definitions[dtype]) do -- XXX: this is a somewhat ugly hack to exclude min/max RRAs when rrasingle is on if not ( self.opts.rrasingle and ( o:match("_min") or o:match("_max") ) ) then table.insert( args, o ) end end -- remember image table.insert( pngs, png ) -- exec self:_rrdtool( args, rrd ) end end end end end return pngs end