540 lines
20 KiB
Python
540 lines
20 KiB
Python
import datetime
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import json
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import logging
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import math
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import time
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from flask import (Flask, request, jsonify, abort, render_template_string, render_template)
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from markupsafe import Markup
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from ltsdb_json import LTS
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log = logging.getLogger(__name__)
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class Dashboard:
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def __init__(self, filename="dashboard.json"):
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with open (filename) as fh:
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d = json.load(fh)
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self.title = d["title"]
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log.debug("title = “%s”", self.title)
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self.description = d["description"]
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self.widgets = []
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for w in d["widgets"]:
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if w["type"] == "timeseries":
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# XXX - currently just a copy of the gauge code,
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# but I want to add support for timeseries graphs with
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# multiple series later so this will change
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if w.get("multi"):
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ts_list = LTS.find(w["data"][0])
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for ts in ts_list:
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try:
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tso = LTS(id=ts)
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except json.decoder.JSONDecodeError as e:
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log.error("%s contains bad data: %s: Skipping", ts, e)
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continue
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if not tso.data:
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log.warning("%s has no data: Skipping", tso.id)
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continue
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if tso.data[-1][0] < time.time() - 7 * 86400:
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log.info("%s too old; Skipping", tso.id)
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continue
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w1 = {**w, "data": [ts]}
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self.widgets.append(TimeSeries(w1))
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else:
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self.widgets.append(TimeSeries(w))
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elif w["type"] == "gauge":
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if w.get("multi"):
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ts_list = LTS.find(w["data"][0])
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for ts in ts_list:
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tso = LTS(id=ts)
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if not tso.data:
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log.warning("%s has no data: Skipping", tso.id)
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continue
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if tso.data[-1][0] < time.time() - 86400:
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log.info("%s too old; Skipping", tso.id)
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continue
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w1 = {**w, "data": [ts]}
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self.widgets.append(Gauge(w1))
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else:
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self.widgets.append(Gauge(w))
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else:
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self.widgets.append(Widget(w))
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# Sort widgets by ascending healthscore to get the most critical at the
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# top.
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self.widgets.sort(key=lambda w: w.healthscore())
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def as_html(self):
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return render_template("dashboard.html", dashboard=self)
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class Widget:
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def __init__(self, d):
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log.debug("")
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self.type = d["type"]
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self.stops = d["stops"]
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self.yscale = d.get("yscale", "linear")
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self.extra = {}
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log.debug("data = %s", d["data"])
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self.lts = LTS(id=d["data"][0]) # by default we handle only one data source
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self.lastvalue = self.lts.data[-1][1]
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def as_html(self):
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log.debug("")
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return Markup(render_template("widget.html", widget=self))
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def healthscore(self, value=None):
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"""
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Return a score between 0 (unhealthy) and 100 (healthy)
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"""
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if value == None:
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value = self.lastvalue
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log.debug("stops = %s", self.stops)
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stops = self.stops
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if stops[-1] < stops[0]:
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value = -value
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stops = [-v for v in stops]
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if value <= stops[0]:
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log.debug("ok")
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return 100
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if value >= stops[-1]:
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log.debug("fail")
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return 0
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for i in range(0, len(stops) - 1):
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if stops[i] <= value < stops[i+1]:
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log.debug("at stop %d", i)
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return 100 - ((value - stops[i]) / (stops[i+1] - stops[i]) + i) * 100 / (len(stops) - 1)
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def criticalcolor(self, value=None):
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healthscore = self.healthscore(value)
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hue = round(healthscore * 120 / 100)
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brightness = 30
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return f"hsl({hue}, 100%, {brightness}%)"
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@property
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def description_formatted(self):
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s = "<table class='description'>"
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for d, v in self.lts.description.items():
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if v:
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s += render_template_string(
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"<tr><th>{{d}}:</th><td>{{v}}</td></tr>",
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d=d, v=v)
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for d, v in self.extra.items():
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if v:
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s += render_template_string(
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"<tr class='extra'><th>{{d}}:</th><td>{{v}}</td></tr>",
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d=d, v=v)
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s += "</table>"
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return Markup(s)
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class TimeSeries(Widget):
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def __init__(self, d):
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log.debug("")
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super().__init__(d)
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pass
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@property
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def graph(self):
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def t2x(t):
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x = n - math.log((t_last - t) / (n*dt) + 1) * n / k
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return x
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def v2y(v):
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if self.yscale == "log":
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try:
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return (1 - math.log(max(v, min_value) / min_value)
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/ math.log(max_value / min_value)
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) * 200
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except ValueError:
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log.error(f"ValueError: v = {v}, min_value = {min_value}, max_value = {max_value}")
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return 0
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elif self.yscale == "linear":
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return (1 - v/max_value) * 200
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else:
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raise ValueError(f"Unknown yscale {self.yscale}")
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def set_x_tickmarks():
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log.debug("")
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tickmarks = []
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t = v_data[-1]["t"]
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x = v_data[-1]["x"]
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d = datetime.datetime.fromtimestamp(t)
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tickmarks.append({"t": t, "t_h": d.strftime("%Y-%m-%d %H:%M:%S"), "x": x})
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min_step = 25
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steps = ("s", "m", "h", "D", "10D", "M", "Y")
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step_i = 0
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while step_i < len(steps):
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t0 = tickmarks[-1]["t"]
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x0 = tickmarks[-1]["x"]
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d0 = datetime.datetime.fromtimestamp(t0)
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log.debug("step_i = %s", step_i)
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if steps[step_i] == "s":
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d1 = datetime.datetime(d0.year, d0.month, d0.day, d0.hour, d0.minute, d0.second)
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t1 = d1.timestamp()
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x1 = t2x(t1)
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if x0 - x1 < min_step:
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d1 -= datetime.timedelta(seconds=1)
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t1 = d1.timestamp()
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x1 = t2x(t1)
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if x0 - x1 < min_step:
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step_i += 1
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continue
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if steps[step_i] == "m":
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d1 = datetime.datetime(d0.year, d0.month, d0.day, d0.hour, d0.minute)
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t1 = d1.timestamp()
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x1 = t2x(t1)
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if x0 - x1 < min_step:
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d1 -= datetime.timedelta(minutes=1)
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t1 = d1.timestamp()
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x1 = t2x(t1)
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if x0 - x1 < min_step:
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step_i += 1
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continue
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if steps[step_i] == "h":
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d1 = datetime.datetime(d0.year, d0.month, d0.day, d0.hour)
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t1 = d1.timestamp()
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x1 = t2x(t1)
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if x0 - x1 < min_step:
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d1 -= datetime.timedelta(hours=1)
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t1 = d1.timestamp()
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x1 = t2x(t1)
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if x0 - x1 < min_step:
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step_i += 1
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continue
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if steps[step_i] == "D":
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d1 = datetime.datetime(d0.year, d0.month, d0.day)
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t1 = d1.timestamp()
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x1 = t2x(t1)
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if x0 - x1 < min_step:
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d1 -= datetime.timedelta(days=1)
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t1 = d1.timestamp()
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x1 = t2x(t1)
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if x0 - x1 < min_step:
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step_i += 1
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continue
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if steps[step_i] == "10D":
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year = d0.year
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month = d0.month
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day = d0.day
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if day > 21:
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day = 21
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elif day > 11:
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day = 11
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elif day > 1:
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day = 1
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else:
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day = 21
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month -= 1
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if month < 1:
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month += 12
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year -= 1
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d1 = datetime.datetime(year, month, day)
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t1 = d1.timestamp()
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x1 = t2x(t1)
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if x0 - x1 < min_step:
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if day > 21:
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day = 21
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elif day > 11:
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day = 11
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elif day > 1:
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day = 1
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else:
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day = 21
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month -= 1
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if month < 1:
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month += 12
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year -= 1
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d1 = datetime.datetime(year, month, day)
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t1 = d1.timestamp()
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x1 = t2x(t1)
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if x0 - x1 < min_step:
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step_i += 1
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continue
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if steps[step_i] == "M":
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d1 = datetime.datetime(d0.year, d0.month, 1)
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t1 = d1.timestamp()
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x1 = t2x(t1)
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if x0 - x1 < min_step:
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if d1.month > 1:
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d1 = datetime.datetime(d1.year, d1.month-1, 1)
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else:
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d1 = datetime.datetime(d1.year-1, 12, 1)
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t1 = d1.timestamp()
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x1 = t2x(t1)
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if x0 - x1 < min_step:
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step_i += 1
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continue
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if steps[step_i] == "Y":
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d1 = datetime.datetime(d0.year, 1, 1)
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t1 = d1.timestamp()
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x1 = t2x(t1)
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if x0 - x1 < min_step:
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d1 = datetime.datetime(d1.year-1, 1, 1)
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t1 = d1.timestamp()
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x1 = t2x(t1)
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if x0 - x1 < min_step:
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log.debug("t0 = %s, x0 = %s, t1 = %s, x1 = %s", t0, x0, t1, x1)
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step_i += 1
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continue
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if x1 < 0:
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break
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tickmarks.append({"t": t1, "t_h": d1.strftime("%Y-%m-%d %H:%M:%S"), "x": x1})
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if tickmarks[-1]["x"] > min_step:
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t = v_data[0]["t"]
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x = v_data[0]["x"]
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d = datetime.datetime.fromtimestamp(t)
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tickmarks.append({"t": t, "t_h": d.strftime("%Y-%m-%d %H:%M:%S"), "x": x})
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self.x_tickmarks = tickmarks
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log.debug("")
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def set_y_tickmarks():
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log.debug("")
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unit = self.lts.description["unit"]
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self.y_tickmarks = []
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if self.yscale == "linear":
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log.debug("")
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if unit == "s" and max_value > 3600:
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if max_value >= 16 * 7 * 86400:
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step = 4 * 7 * 86400
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step_d = 4
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unit = "w"
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elif max_value >= 4 * 7 * 86400:
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step = 7 * 86400
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step_d = 1
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unit = "w"
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elif max_value >= 10 * 86400:
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step = 3 * 86400
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step_d = 3
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unit = "d"
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elif max_value >= 4 * 86400:
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step = 86400
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step_d = 1
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unit = "d"
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elif max_value >= 4 * 3600:
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step = 3600
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step_d = 1
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unit = "h"
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else:
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step = 10 * 60
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step_d = 10
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unit = "m"
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v = 0
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v_d = 0
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while v < max_value:
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y = v2y(v)
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log.debug("v = %s, y = %s", v, y)
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self.y_tickmarks.append({"y": y, "v_h": f"{v_d} {unit}"})
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v += step
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v_d += step_d
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else:
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step = 10 ** math.floor(math.log10(max_value))
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v = 0
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while v < max_value:
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y = v2y(v)
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log.debug("v = %s, y = %s", v, y)
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self.y_tickmarks.append({"y": y, "v_h": str(v)})
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v += step
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log.debug("")
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elif self.yscale == "log":
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if unit == "s" and max_value > 3600:
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steps = (
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(3600, "1 h"),
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(86400, "1 d"),
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(7*86400, "1 w"),
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(28*86400, "4 w"),
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(365*86400, "1 y"),
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(3652.5 * 86400, "10 y"),
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)
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for s in steps:
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if min_value <= s[0] <= max_value:
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self.y_tickmarks.append({"y": v2y(s[0]), "v_h": s[1]})
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else:
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log.debug("")
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v = 10 ** math.ceil(math.log10(min_value))
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log.debug("v = %s", v)
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if v > max_value:
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# Implement that when it happens
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log.warning("No tickmark between %s and %s", min_value, max_value)
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return
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while v <= max_value:
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y = v2y(v)
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log.debug("v = %s, y = %s", v, y)
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self.y_tickmarks.append({"y": y, "v_h": str(v)})
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v *= 10
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log.debug("")
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else:
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log.debug("")
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raise ValueError(f"Unknown yscale {self.yscale}")
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log.debug("")
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log.debug("in graph for %s", self.lts.id)
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data = self.lts.data
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n = len(data)
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t_last = data[-1][0]
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if len(data) < 5:
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return "(not enough data)"
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dt = (t_last - data[-5][0]) / 4
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k = math.log((t_last - data[0][0]) / dt / n + 1)
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log.debug("times = [%s ... %s ... %s]", data[0][0], data[-5][0], data[-1][0])
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max_value = max([d[3] if len(d) >= 4 else d[1] for d in self.lts.data])
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max_value = max(max_value, 0.001) # ensure positive
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unit = self.lts.description["unit"]
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if self.yscale == "log":
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try:
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min_value = min(d[1] for d in self.lts.data if d[1] > 0)
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if unit == "s":
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self.extra["min"] = "%g" % min_value + " (" + self.format_time(min_value) + ")"
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else:
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self.extra["min"] = "%g" % min_value
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except ValueError:
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# no non-negative values
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min_value = max_value / 2
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if any(True for d in self.lts.data if d[1] < min_value):
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# if there are values smaller than the minimum (i.e.
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# 0 or negative unless we have a configured minimum)
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# reduce the minimum again so that we have a distinct
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# value to clamp to.
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min_value /= 2
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if min_value == max_value:
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# Make sure min_value is less than max_value
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min_value /= 2
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log.debug("min_value = %s, max_value = %s", min_value, max_value)
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if unit == "s":
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self.extra["max"] = "%g" % max_value + " (" + self.format_time(max_value) + ")"
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self.extra["last"] = "%g" % data[-1][1] + " (" + self.format_time(data[-1][1]) + ")"
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else:
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self.extra["max"] = "%g" % max_value
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self.extra["last"] = "%g" % data[-1][1]
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log.debug("collecting data")
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v_data = []
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for i in range(n):
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t = data[i][0]
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v = data[i][1]
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if len(data[i]) >= 4:
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v_min = data[i][2]
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v_max = data[i][3]
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else:
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v_min = data[i][1]
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v_max = data[i][1]
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x = t2x(t)
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t_h = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime(t))
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y = v2y(v)
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y_min = v2y(v_min)
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y_max = v2y(v_max)
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#print(t, t_h, x)
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v_data.append(
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{
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"t": t,
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"v": v,
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"x": x,
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"y": y,
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"y_min": y_min,
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"y_max": y_max,
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"color": self.criticalcolor(v),
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})
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log.debug("setting tickmarks")
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set_x_tickmarks()
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set_y_tickmarks()
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log.debug("assembling svg")
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html = ""
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html += "<svg width=1150 height=300>"
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for tm in self.x_tickmarks:
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html += f"<line x1={tm['x']} y1=0 x2={tm['x']} y2=200 stroke='#CCC' />"
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html += f"<text transform='translate({tm['x']}, 210) rotate(30)' fill='#888'>{tm['t_h']}</text>"
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for tm in self.y_tickmarks:
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log.debug("tm = %s", tm)
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html += f"<line x1=0 y1={tm['y']} x2=1000 y2={tm['y']} stroke='#CCC' />"
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html += f"<text x=1005 y={tm['y']} fill='#888'>{tm['v_h']}</text>"
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for v in v_data:
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html += f"<line x1={v['x']-3} x2={v['x']+3} y1={v['y']} y2={v['y']} stroke='{v['color']}' />"
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html += f"<line x1={v['x']} x2={v['x']} y1={v['y_min']} y2={v['y_max']} stroke='{v['color']}' />"
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html += "</svg>"
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log.debug("len(html) = %s", len(html))
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return Markup(html)
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def as_html(self):
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log.debug("in as_html")
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return Markup(render_template("timeseries.html", widget=self))
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def format_time(self, seconds):
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value = seconds
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unit = "s"
|
|
if value >= 365.25 * 86400:
|
|
value /= 365.25 * 86400
|
|
unit = "years"
|
|
elif value >= 86400:
|
|
value /= 86400
|
|
unit = "days"
|
|
elif value >= 3600:
|
|
value /= 3600
|
|
unit = "h"
|
|
elif value >= 60:
|
|
value /= 60
|
|
unit = "m"
|
|
elif value >= 1:
|
|
pass
|
|
elif value >= 0.001:
|
|
value *= 1000
|
|
unit = "ms"
|
|
return f"{value:.2f} {unit}"
|
|
|
|
|
|
class Gauge(Widget):
|
|
def __init__(self, d):
|
|
super().__init__(d)
|
|
pass
|
|
|
|
gaugesize = 100
|
|
|
|
@property
|
|
def gaugepos(self):
|
|
max_value = max([d[1] for d in self.lts.data])
|
|
max_value = max(max_value, 1) # ensure positive
|
|
log.debug("max_value = %s", max_value)
|
|
return self.lastvalue / max_value * self.gaugesize
|
|
|
|
def as_html(self):
|
|
log.debug("")
|
|
self.lastvalue = self.lts.data[-1][1]
|
|
value = self.lastvalue
|
|
unit = self.lts.description["unit"]
|
|
log.debug("unit = %s", unit)
|
|
if unit == "s":
|
|
if value >= 365.25 * 86400:
|
|
value /= 365.25 * 86400
|
|
unit = "years"
|
|
elif value >= 86400:
|
|
value /= 86400
|
|
unit = "days"
|
|
elif value >= 3600:
|
|
value /= 3600
|
|
unit = "h"
|
|
elif value >= 60:
|
|
value /= 60
|
|
unit = "m"
|
|
elif value >= 1:
|
|
pass
|
|
elif value >= 0.001:
|
|
value *= 1000
|
|
unit = "ms"
|
|
self.lastvalue_formatted = Markup(f"<span class='value'>{value:.2f}</span><span class='unit'>{unit}</unit>")
|
|
return Markup(render_template("gauge.html", widget=self))
|
|
|
|
# vim: sw=4
|