Mercurial > templog
annotate web/log.py @ 369:dc9d63e2fd7a
UI tweaks
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Tue, 26 Jun 2012 21:21:40 +0800 |
| parents | 3db118498b97 |
| children | 46c43e13a759 |
| rev | line source |
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1 #:vim:et:ts=4:sts=4:sw=4: |
| 333 | 2 import rrdtool |
| 3 import os | |
| 335 | 4 import os.path |
| 333 | 5 import sys |
| 335 | 6 import glob |
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7 import hashlib |
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8 import tempfile |
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9 import time |
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10 import syslog |
| 349 | 11 import sqlite3 |
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12 import traceback |
| 335 | 13 from colorsys import hls_to_rgb |
| 333 | 14 |
| 334 | 15 import config |
| 333 | 16 |
| 17 def sensor_rrd_path(s): | |
| 334 | 18 return '%s/sensor_%s.rrd' % (config.DATA_PATH, s) |
| 333 | 19 |
| 335 | 20 # returns (path, sensor_name) tuples |
| 21 def all_sensors(): | |
| 22 return [(r, os.path.basename(r[:-4])) | |
| 23 for r in glob.glob('%s/*.rrd' % config.DATA_PATH)] | |
| 24 | |
| 333 | 25 def create_rrd(sensor_id): |
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26 # start date of 10 seconds into 1970 is used so that we can |
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27 # update with prior values straight away. |
| 367 | 28 if 'voltage' in sensor_id: |
| 369 | 29 args = [ |
| 30 '--step', '3600', | |
| 31 'DS:temp:GAUGE:7200:1:10', | |
| 32 'RRA:AVERAGE:0.5:1:87600'] | |
| 367 | 33 else: |
| 369 | 34 args = [ |
| 35 '--step', '300', | |
| 36 'DS:temp:GAUGE:600:-10:100', | |
| 367 | 37 'RRA:AVERAGE:0.5:1:1051200'] |
| 333 | 38 |
| 367 | 39 rrdtool.create(sensor_rrd_path(sensor_id), |
| 369 | 40 '--start', 'now-60d', |
| 367 | 41 *args) |
| 335 | 42 |
| 43 # stolen from viewmtn, stolen from monotone-viz | |
| 44 def colour_from_string(str): | |
| 45 def f(off): | |
| 46 return ord(hashval[off]) / 256.0 | |
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47 hashval = hashlib.sha1(str).digest() |
| 335 | 48 hue = f(5) |
| 49 li = f(1) * 0.15 + 0.55 | |
| 50 sat = f(2) * 0.5 + .5 | |
| 51 return ''.join(["%.2x" % int(x * 256) for x in hls_to_rgb(hue, li, sat)]) | |
| 52 | |
| 53 def graph_png(start, length): | |
| 54 rrds = all_sensors() | |
| 55 | |
| 56 graph_args = [] | |
| 367 | 57 have_volts = False |
| 335 | 58 for n, (rrdfile, sensor) in enumerate(rrds): |
| 367 | 59 if 'avrtemp' in sensor: |
| 60 continue | |
| 61 if 'voltage' in sensor: | |
| 62 have_volts = True | |
| 63 vname = 'scalevolts' | |
| 64 graph_args = ['DEF:rawvolts=%(rrdfile)s:temp:AVERAGE:step=3600' % locals(), | |
| 369 | 65 'CDEF:scalevolts=rawvolts,2,-,0.1,/'] + graph_args |
| 367 | 66 else: |
| 67 vname = 'temp%d' % n | |
| 68 graph_args.append('DEF:%(vname)s=%(rrdfile)s:temp:AVERAGE' % locals()) | |
| 335 | 69 width = config.LINE_WIDTH |
| 70 legend = config.SENSOR_NAMES.get(sensor, sensor) | |
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71 colour = config.SENSOR_COLOURS.get(legend, colour_from_string(sensor)) |
| 335 | 72 graph_args.append('LINE%(width)f:%(vname)s#%(colour)s:%(legend)s' % locals()) |
| 73 | |
| 74 tempf = tempfile.NamedTemporaryFile() | |
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75 args = [tempf.name, '-s', str(int(start)), |
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76 '-e', str(int(start+length)), |
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77 '-w', str(config.GRAPH_WIDTH), |
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78 '-h', str(config.GRAPH_HEIGHT), |
| 335 | 79 '--slope-mode', |
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80 '--border', '0', |
| 367 | 81 '--vertical-label', 'Temperature', |
| 362 | 82 '--y-grid', '1:1', |
| 83 '--grid-dash', '1:0', | |
| 84 '--color', 'GRID#00000000', | |
| 85 '--color', 'MGRID#aaaaaa', | |
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86 '--color', 'BACK#ffffff', |
| 367 | 87 'VRULE:%d#ee0000' % time.time(), |
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88 '--imgformat', 'PNG'] \ |
| 335 | 89 + graph_args |
| 369 | 90 args += ['--font', 'DEFAULT:11:%s' % config.GRAPH_FONT] |
| 91 args += ['--font', 'WATERMARK:6:%s' % config.GRAPH_FONT] | |
| 367 | 92 if have_volts: |
| 369 | 93 args += ['--right-axis', '0.1:2', # matches the scalevolts CDEF above |
| 367 | 94 '--right-axis-format', '%.2lf', |
| 95 '--right-axis-label', 'Voltage'] | |
| 96 | |
| 335 | 97 rrdtool.graph(*args) |
| 98 return tempf.read() | |
| 99 | |
| 333 | 100 def sensor_update(sensor_id, measurements, first_real_time, time_step): |
| 101 try: | |
| 102 open(sensor_rrd_path(sensor_id)) | |
| 103 except IOError, e: | |
| 104 create_rrd(sensor_id) | |
| 105 | |
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106 if measurements: |
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107 values = ['%d:%f' % p for p in |
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108 zip((first_real_time + time_step*t for t in xrange(len(measurements))), |
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109 measurements)] |
| 333 | 110 |
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111 rrdfile = sensor_rrd_path(sensor_id) |
| 346 | 112 # XXX what to do here when it fails... |
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113 for v in values: |
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114 try: |
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115 rrdtool.update(rrdfile, v) |
| 369 | 116 except rrdtool.error, e: |
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117 print>>sys.stderr, "Bad rrdtool update '%s'" % v |
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118 traceback.print_exc(file=sys.stderr) |
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119 |
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120 # be paranoid |
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121 f = file(rrdfile) |
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122 os.fsync(f.fileno()) |
| 333 | 123 |
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124 def record_debug(lines): |
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125 f = open('%s/debug.log' % config.DATA_PATH, 'a+') |
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126 f.write('===== %s =====\n' % time.strftime('%a, %d %b %Y %H:%M:%S')) |
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127 f.writelines(('%s\n' % s for s in lines)) |
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128 f.flush() |
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129 return f |
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130 |
| 333 | 131 def parse(lines): |
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132 |
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133 debugf = record_debug(lines) |
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134 |
| 333 | 135 entries = dict(l.split('=', 1) for l in lines) |
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136 if len(entries) != len(lines): |
| 333 | 137 raise Exception("Keys are not unique") |
| 138 | |
| 139 num_sensors = int(entries['sensors']) | |
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140 num_measurements = int(entries['measurements']) |
| 333 | 141 |
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142 sensors = [entries['sensor_id%d' % n] for n in xrange(num_sensors)] |
| 333 | 143 |
| 144 meas = [] | |
| 145 for s in sensors: | |
| 146 meas.append([]) | |
| 147 | |
| 334 | 148 def val_scale(v): |
| 149 # convert decidegrees to degrees | |
| 150 return 0.1 * v | |
| 151 | |
| 333 | 152 for n in xrange(num_measurements): |
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153 vals = [val_scale(int(x)) for x in entries["meas%d" % n].strip().split()] |
| 333 | 154 if len(vals) != num_sensors: |
| 155 raise Exception("Wrong number of sensors for measurement %d" % n) | |
| 156 # we make an array of values for each sensor | |
| 157 for s in xrange(num_sensors): | |
| 158 meas[s].append(vals[s]) | |
| 159 | |
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160 avr_now = float(entries['now']) |
| 333 | 161 avr_first_time = float(entries['first_time']) |
| 162 time_step = float(entries['time_step']) | |
| 163 | |
| 367 | 164 if 'avrtemp' in entries: |
| 165 avrtemp = val_scale(int(entries['avrtemp'])) | |
| 166 sensor_update('avrtemp', [avrtemp], time.time(), 1) | |
| 167 | |
| 168 if 'voltage' in entries: | |
| 169 voltage = 0.001 * int(entries['voltage']) | |
| 170 sensor_update('voltage', [voltage], time.time(), 1) | |
| 171 | |
| 346 | 172 #sqlite |
| 173 # - time | |
| 174 # - voltage | |
| 175 # - boot time | |
| 176 | |
| 333 | 177 first_real_time = time.time() - (avr_now - avr_first_time) |
| 178 | |
| 179 for sensor_id, measurements in zip(sensors, meas): | |
| 346 | 180 # XXX sqlite add |
| 333 | 181 sensor_update(sensor_id, measurements, first_real_time, time_step) |
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182 |
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183 debugf.write("Updated %d sensors\n" % len(sensors)) |
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184 debugf.flush() |