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396 lines
12 KiB
396 lines
12 KiB
# coding: utf-8
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import hashlib
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import json
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import uuid
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from datetime import datetime, timedelta as td
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from croniter import croniter
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from django.conf import settings
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from django.core.checks import Warning
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from django.contrib.auth.models import User
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from django.db import models
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from django.urls import reverse
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from django.utils import timezone
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from hc.api import transports
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from hc.lib import emails
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STATUSES = (
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("up", "Up"),
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("down", "Down"),
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("new", "New"),
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("paused", "Paused")
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)
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DEFAULT_TIMEOUT = td(days=1)
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DEFAULT_GRACE = td(hours=1)
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CHECK_KINDS = (("simple", "Simple"),
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("cron", "Cron"))
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CHANNEL_KINDS = (("email", "Email"),
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("webhook", "Webhook"),
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("hipchat", "HipChat"),
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("slack", "Slack"),
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("pd", "PagerDuty"),
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("po", "Pushover"),
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("pushbullet", "Pushbullet"),
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("opsgenie", "OpsGenie"),
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("victorops", "VictorOps"),
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("discord", "Discord"),
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("telegram", "Telegram"),
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("sms", "SMS"))
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PO_PRIORITIES = {
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-2: "lowest",
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-1: "low",
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0: "normal",
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1: "high",
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2: "emergency"
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}
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def isostring(dt):
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"""Convert the datetime to ISO 8601 format with no microseconds. """
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return dt.replace(microsecond=0).isoformat()
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class Check(models.Model):
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class Meta:
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# sendalerts command will query using these
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index_together = ["status", "user", "alert_after"]
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name = models.CharField(max_length=100, blank=True)
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tags = models.CharField(max_length=500, blank=True)
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code = models.UUIDField(default=uuid.uuid4, editable=False, db_index=True)
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user = models.ForeignKey(User, models.CASCADE, blank=True, null=True)
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created = models.DateTimeField(auto_now_add=True)
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kind = models.CharField(max_length=10, default="simple",
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choices=CHECK_KINDS)
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timeout = models.DurationField(default=DEFAULT_TIMEOUT)
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grace = models.DurationField(default=DEFAULT_GRACE)
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schedule = models.CharField(max_length=100, default="* * * * *")
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tz = models.CharField(max_length=36, default="UTC")
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n_pings = models.IntegerField(default=0)
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last_ping = models.DateTimeField(null=True, blank=True)
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last_ping_body = models.CharField(max_length=10000, blank=True)
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alert_after = models.DateTimeField(null=True, blank=True, editable=False)
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status = models.CharField(max_length=6, choices=STATUSES, default="new")
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def name_then_code(self):
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if self.name:
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return self.name
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return str(self.code)
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def url(self):
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return settings.PING_ENDPOINT + str(self.code)
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def log_url(self):
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return settings.SITE_ROOT + reverse("hc-log", args=[self.code])
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def email(self):
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return "%s@%s" % (self.code, settings.PING_EMAIL_DOMAIN)
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def send_alert(self):
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if self.status not in ("up", "down"):
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raise NotImplementedError("Unexpected status: %s" % self.status)
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errors = []
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for channel in self.channel_set.all():
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error = channel.notify(self)
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if error not in ("", "no-op"):
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errors.append((channel, error))
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return errors
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def get_grace_start(self):
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""" Return the datetime when grace period starts. """
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# The common case, grace starts after timeout
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if self.kind == "simple":
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return self.last_ping + self.timeout
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# The complex case, next ping is expected based on cron schedule
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with timezone.override(self.tz):
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last_naive = timezone.make_naive(self.last_ping)
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it = croniter(self.schedule, last_naive)
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next_naive = it.get_next(datetime)
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return timezone.make_aware(next_naive, is_dst=False)
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def get_status(self, now=None):
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""" Return "up" if the check is up or in grace, otherwise "down". """
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if self.status in ("new", "paused"):
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return self.status
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if now is None:
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now = timezone.now()
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return "up" if self.get_grace_start() + self.grace > now else "down"
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def get_alert_after(self):
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""" Return the datetime when check potentially goes down. """
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return self.get_grace_start() + self.grace
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def in_grace_period(self):
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""" Return True if check is currently in grace period. """
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if self.status in ("new", "paused"):
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return False
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grace_start = self.get_grace_start()
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grace_end = grace_start + self.grace
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return grace_start < timezone.now() < grace_end
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def assign_all_channels(self):
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if self.user:
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channels = Channel.objects.filter(user=self.user)
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self.channel_set.add(*channels)
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def tags_list(self):
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return [t.strip() for t in self.tags.split(" ") if t.strip()]
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def to_dict(self):
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update_rel_url = reverse("hc-api-update", args=[self.code])
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pause_rel_url = reverse("hc-api-pause", args=[self.code])
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result = {
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"name": self.name,
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"ping_url": self.url(),
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"update_url": settings.SITE_ROOT + update_rel_url,
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"pause_url": settings.SITE_ROOT + pause_rel_url,
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"tags": self.tags,
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"grace": int(self.grace.total_seconds()),
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"n_pings": self.n_pings,
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"status": self.get_status()
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}
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if self.kind == "simple":
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result["timeout"] = int(self.timeout.total_seconds())
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elif self.kind == "cron":
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result["schedule"] = self.schedule
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result["tz"] = self.tz
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if self.last_ping:
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result["last_ping"] = isostring(self.last_ping)
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result["next_ping"] = isostring(self.get_grace_start())
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else:
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result["last_ping"] = None
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result["next_ping"] = None
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return result
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def has_confirmation_link(self):
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return "confirm" in self.last_ping_body.lower()
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@classmethod
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def check(cls, **kwargs):
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errors = super(Check, cls).check(**kwargs)
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trigger_detected = False
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try:
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dummy = Check(last_ping=timezone.now())
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dummy.save()
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dummy.refresh_from_db()
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trigger_detected = bool(dummy.alert_after)
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dummy.delete()
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except:
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pass
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if trigger_detected:
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err = Warning(
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"Obsolete 'update_alert_after' trigger exists in database.",
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hint="Please remove the trigger with 'manage.py droptriggers'",
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id="hc.api.E001")
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errors.append(err)
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return errors
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class Ping(models.Model):
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n = models.IntegerField(null=True)
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owner = models.ForeignKey(Check, models.CASCADE)
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created = models.DateTimeField(auto_now_add=True)
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scheme = models.CharField(max_length=10, default="http")
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remote_addr = models.GenericIPAddressField(blank=True, null=True)
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method = models.CharField(max_length=10, blank=True)
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ua = models.CharField(max_length=200, blank=True)
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class Channel(models.Model):
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code = models.UUIDField(default=uuid.uuid4, editable=False)
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user = models.ForeignKey(User, models.CASCADE)
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created = models.DateTimeField(auto_now_add=True)
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kind = models.CharField(max_length=20, choices=CHANNEL_KINDS)
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value = models.TextField(blank=True)
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email_verified = models.BooleanField(default=False)
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checks = models.ManyToManyField(Check)
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def assign_all_checks(self):
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checks = Check.objects.filter(user=self.user)
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self.checks.add(*checks)
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def make_token(self):
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seed = "%s%s" % (self.code, settings.SECRET_KEY)
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seed = seed.encode("utf8")
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return hashlib.sha1(seed).hexdigest()
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def send_verify_link(self):
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args = [self.code, self.make_token()]
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verify_link = reverse("hc-verify-email", args=args)
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verify_link = settings.SITE_ROOT + verify_link
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emails.verify_email(self.value, {"verify_link": verify_link})
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def get_unsub_link(self):
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args = [self.code, self.make_token()]
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verify_link = reverse("hc-unsubscribe-alerts", args=args)
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return settings.SITE_ROOT + verify_link
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@property
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def transport(self):
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if self.kind == "email":
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return transports.Email(self)
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elif self.kind == "webhook":
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return transports.Webhook(self)
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elif self.kind == "slack":
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return transports.Slack(self)
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elif self.kind == "hipchat":
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return transports.HipChat(self)
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elif self.kind == "pd":
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return transports.PagerDuty(self)
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elif self.kind == "victorops":
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return transports.VictorOps(self)
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elif self.kind == "pushbullet":
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return transports.Pushbullet(self)
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elif self.kind == "po":
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return transports.Pushover(self)
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elif self.kind == "opsgenie":
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return transports.OpsGenie(self)
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elif self.kind == "discord":
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return transports.Discord(self)
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elif self.kind == "telegram":
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return transports.Telegram(self)
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elif self.kind == "sms":
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return transports.Sms(self)
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else:
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raise NotImplementedError("Unknown channel kind: %s" % self.kind)
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def notify(self, check):
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if self.transport.is_noop(check):
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return "no-op"
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n = Notification(owner=check, channel=self)
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n.check_status = check.status
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n.error = "Sending"
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n.save()
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if self.kind == "email":
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error = self.transport.notify(check, n.bounce_url()) or ""
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else:
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error = self.transport.notify(check) or ""
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n.error = error
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n.save()
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return error
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@property
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def po_value(self):
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assert self.kind == "po"
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user_key, prio = self.value.split("|")
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prio = int(prio)
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return user_key, prio, PO_PRIORITIES[prio]
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@property
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def value_down(self):
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assert self.kind == "webhook"
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parts = self.value.split("\n")
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return parts[0]
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@property
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def value_up(self):
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assert self.kind == "webhook"
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parts = self.value.split("\n")
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return parts[1] if len(parts) > 1 else ""
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@property
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def post_data(self):
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assert self.kind == "webhook"
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parts = self.value.split("\n")
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return parts[2] if len(parts) > 2 else ""
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@property
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def slack_team(self):
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assert self.kind == "slack"
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if not self.value.startswith("{"):
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return None
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doc = json.loads(self.value)
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return doc["team_name"]
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@property
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def slack_channel(self):
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assert self.kind == "slack"
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if not self.value.startswith("{"):
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return None
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doc = json.loads(self.value)
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return doc["incoming_webhook"]["channel"]
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@property
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def slack_webhook_url(self):
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assert self.kind == "slack"
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if not self.value.startswith("{"):
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return self.value
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doc = json.loads(self.value)
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return doc["incoming_webhook"]["url"]
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@property
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def discord_webhook_url(self):
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assert self.kind == "discord"
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doc = json.loads(self.value)
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return doc["webhook"]["url"]
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@property
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def discord_webhook_id(self):
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assert self.kind == "discord"
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doc = json.loads(self.value)
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return doc["webhook"]["id"]
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@property
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def telegram_id(self):
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assert self.kind == "telegram"
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doc = json.loads(self.value)
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return doc.get("id")
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@property
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def telegram_type(self):
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assert self.kind == "telegram"
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doc = json.loads(self.value)
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return doc.get("type")
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@property
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def telegram_name(self):
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assert self.kind == "telegram"
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doc = json.loads(self.value)
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return doc.get("name")
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def latest_notification(self):
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return Notification.objects.filter(channel=self).latest()
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class Notification(models.Model):
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class Meta:
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get_latest_by = "created"
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code = models.UUIDField(default=uuid.uuid4, null=True, editable=False)
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owner = models.ForeignKey(Check, models.CASCADE)
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check_status = models.CharField(max_length=6)
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channel = models.ForeignKey(Channel, models.CASCADE)
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created = models.DateTimeField(auto_now_add=True)
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error = models.CharField(max_length=200, blank=True)
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def bounce_url(self):
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return settings.SITE_ROOT + reverse("hc-api-bounce", args=[self.code])
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