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238 lines
7.7 KiB
238 lines
7.7 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 timedelta as td
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import requests
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from django.conf import settings
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from django.contrib.auth.models import User
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from django.core.urlresolvers import reverse
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from django.db import models
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from django.template.loader import render_to_string
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from django.utils import timezone
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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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CHANNEL_KINDS = (("email", "Email"), ("webhook", "Webhook"),
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("hipchat", "HipChat"),
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("slack", "Slack"), ("pd", "PagerDuty"), ("po", "Pushover"))
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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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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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code = models.UUIDField(default=uuid.uuid4, editable=False, db_index=True)
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user = models.ForeignKey(User, blank=True, null=True)
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created = models.DateTimeField(auto_now_add=True)
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timeout = models.DurationField(default=DEFAULT_TIMEOUT)
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grace = models.DurationField(default=DEFAULT_GRACE)
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last_ping = models.DateTimeField(null=True, 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 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 NotImplemented("Unexpected status: %s" % self.status)
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for channel in self.channel_set.all():
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channel.notify(self)
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def get_status(self):
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if self.status in ("new", "paused"):
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return self.status
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now = timezone.now()
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if self.last_ping + self.timeout > now:
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return "up"
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if self.last_ping + self.timeout + self.grace > now:
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return "grace"
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return "down"
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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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class Ping(models.Model):
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owner = models.ForeignKey(Check)
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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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body = models.TextField(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)
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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.CharField(max_length=200, 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 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 notify(self, check):
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n = Notification(owner=check, channel=self)
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n.check_status = check.status
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if self.kind == "email" and self.email_verified:
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ctx = {
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"check": check,
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"checks": self.user.check_set.order_by("created"),
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"now": timezone.now()
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}
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emails.alert(self.value, ctx)
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n.save()
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elif self.kind == "webhook" and check.status == "down":
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try:
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r = requests.get(self.value, timeout=5)
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n.status = r.status_code
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except requests.exceptions.Timeout:
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# Well, we tried
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pass
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n.save()
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elif self.kind == "slack":
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tmpl = "integrations/slack_message.html"
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text = render_to_string(tmpl, {"check": check})
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payload = {
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"text": text,
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"username": "healthchecks.io",
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"icon_url": "https://healthchecks.io/static/img/[email protected]"
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}
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r = requests.post(self.value, json=payload, timeout=5)
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n.status = r.status_code
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n.save()
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elif self.kind == "hipchat":
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tmpl = "integrations/hipchat_message.html"
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text = render_to_string(tmpl, {"check": check})
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payload = {
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"message": text,
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"color": "green" if check.status == "up" else "red",
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}
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r = requests.post(self.value, json=payload, timeout=5)
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n.status = r.status_code
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n.save()
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elif self.kind == "pd":
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if check.status == "down":
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event_type = "trigger"
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description = "%s is DOWN" % check.name_then_code()
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else:
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event_type = "resolve"
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description = "%s received a ping and is now UP" % \
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check.name_then_code()
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payload = {
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"service_key": self.value,
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"incident_key": str(check.code),
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"event_type": event_type,
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"description": description,
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"client": "healthchecks.io",
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"client_url": settings.SITE_ROOT
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}
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url = "https://events.pagerduty.com/generic/2010-04-15/create_event.json"
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r = requests.post(url, data=json.dumps(payload), timeout=5)
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n.status = r.status_code
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n.save()
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elif self.kind == "po":
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tmpl = "integrations/pushover_message.html"
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ctx = {
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"check": check,
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"down_checks": self.user.check_set.filter(status="down").exclude(code=check.code).order_by("created"),
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}
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text = render_to_string(tmpl, ctx).strip()
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if check.status == "down":
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title = "%s is DOWN" % check.name_then_code()
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else:
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title = "%s is now UP" % check.name_then_code()
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user_key, priority, _ = self.po_value
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payload = {
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"token": settings.PUSHOVER_API_TOKEN,
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"user": user_key,
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"message": text,
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"title": title,
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"html": 1,
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"priority": priority,
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}
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if priority == 2: # Emergency notification
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payload["retry"] = settings.PUSHOVER_EMERGENCY_RETRY_DELAY
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payload["expire"] = settings.PUSHOVER_EMERGENCY_EXPIRATION
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url = "https://api.pushover.net/1/messages.json"
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r = requests.post(url, data=payload, timeout=5)
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n.status = r.status_code
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n.save()
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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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class Notification(models.Model):
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owner = models.ForeignKey(Check)
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check_status = models.CharField(max_length=6)
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channel = models.ForeignKey(Channel)
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created = models.DateTimeField(auto_now_add=True)
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status = models.IntegerField(default=0)
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