Mercurial > templog
view web/log.py @ 50:cfcd2891b634
merge
author | Matt Johnston <matt@ucc.asn.au> |
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date | Sun, 24 Jun 2012 10:37:56 +0800 |
parents | 206294a354a7 |
children | 79761ee67134 |
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#:vim:et:ts=4:sts=4:sw=4: import rrdtool import os import os.path import sys import glob import hashlib import tempfile import time import syslog import sqlite3 import traceback from colorsys import hls_to_rgb import config def sensor_rrd_path(s): return '%s/sensor_%s.rrd' % (config.DATA_PATH, s) # returns (path, sensor_name) tuples def all_sensors(): return [(r, os.path.basename(r[:-4])) for r in glob.glob('%s/*.rrd' % config.DATA_PATH)] def create_rrd(sensor_id): # start date of 10 seconds into 1970 is used so that we can # update with prior values straight away. args = [sensor_rrd_path(sensor_id), '--start', '10', '--step', '300', 'DS:temp:GAUGE:600:-10:100', 'RRA:AVERAGE:0.5:1:1051200'] rrdtool.create(*args) # stolen from viewmtn, stolen from monotone-viz def colour_from_string(str): def f(off): return ord(hashval[off]) / 256.0 hashval = hashlib.sha1(str).digest() hue = f(5) li = f(1) * 0.15 + 0.55 sat = f(2) * 0.5 + .5 return ''.join(["%.2x" % int(x * 256) for x in hls_to_rgb(hue, li, sat)]) def graph_png(start, length): rrds = all_sensors() graph_args = [] for n, (rrdfile, sensor) in enumerate(rrds): vname = 'temp%d' % n graph_args.append('DEF:%(vname)s=%(rrdfile)s:temp:AVERAGE' % locals()) width = config.LINE_WIDTH legend = config.SENSOR_NAMES.get(sensor, sensor) colour = config.SENSOR_COLOURS.get(legend, colour_from_string(sensor)) graph_args.append('LINE%(width)f:%(vname)s#%(colour)s:%(legend)s' % locals()) tempf = tempfile.NamedTemporaryFile() args = [tempf.name, '-s', str(int(start)), '-e', str(int(start+length)), '-w', str(config.GRAPH_WIDTH), '-h', str(config.GRAPH_HEIGHT), '--slope-mode', '--border', '0', '--color', 'BACK#ffffff', '--alt-y-grid', '--imgformat', 'PNG'] \ + graph_args if config.GRAPH_FONT: args += ['--font', 'DEFAULT:0:%s' % config.GRAPH_FONT] print>>sys.stderr, args rrdtool.graph(*args) return tempf.read() def sensor_update(sensor_id, measurements, first_real_time, time_step): try: open(sensor_rrd_path(sensor_id)) except IOError, e: create_rrd(sensor_id) print>>sys.stderr, sensor_id, measurements, first_real_time, time_step if measurements: values = ['%d:%f' % p for p in zip((first_real_time + time_step*t for t in xrange(len(measurements))), measurements)] rrdfile = sensor_rrd_path(sensor_id) print>>sys.stderr, values # XXX what to do here when it fails... for v in values: try: rrdtool.update(rrdfile, v) except Exception, e: print>>sys.stderr, "Bad rrdtool update '%s'" % v traceback.print_exc(file=sys.stderr) # be paranoid f = file(rrdfile) os.fsync(f.fileno()) def record_debug(lines): f = open('%s/debug.log' % config.DATA_PATH, 'a+') f.write('===== %s =====\n' % time.strftime('%a, %d %b %Y %H:%M:%S')) f.writelines(('%s\n' % s for s in lines)) f.flush() return f def parse(lines): debugf = record_debug(lines) entries = dict(l.split('=', 1) for l in lines) if len(entries) != len(lines): raise Exception("Keys are not unique") num_sensors = int(entries['sensors']) num_measurements = int(entries['measurements']) sensors = [entries['sensor_id%d' % n] for n in xrange(num_sensors)] meas = [] for s in sensors: meas.append([]) def val_scale(v): # convert decidegrees to degrees return 0.1 * v for n in xrange(num_measurements): vals = [val_scale(int(x)) for x in entries["meas%d" % n].strip().split()] if len(vals) != num_sensors: raise Exception("Wrong number of sensors for measurement %d" % n) # we make an array of values for each sensor for s in xrange(num_sensors): meas[s].append(vals[s]) avr_now = float(entries['now']) avr_first_time = float(entries['first_time']) time_step = float(entries['time_step']) #sqlite # - time # - voltage # - boot time first_real_time = time.time() - (avr_now - avr_first_time) for sensor_id, measurements in zip(sensors, meas): # XXX sqlite add sensor_update(sensor_id, measurements, first_real_time, time_step) debugf.write("Updated %d sensors\n" % len(sensors)) debugf.flush()