You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
107 lines
3.0 KiB
Python
107 lines
3.0 KiB
Python
"""
|
|
Format the alert message.
|
|
"""
|
|
|
|
import asyncio
|
|
import dataclasses
|
|
import json
|
|
from collections import defaultdict
|
|
from typing import (
|
|
Any,
|
|
NoReturn,
|
|
Optional
|
|
)
|
|
from jinja2 import BaseLoader, Environment, Template
|
|
from .config import Config
|
|
|
|
@dataclasses.dataclass
|
|
class Message:
|
|
body: str
|
|
formated_body: Optional[str]
|
|
|
|
DEFAULT_TEMPLATE_RAW: str = (
|
|
"{% if alert['labels']['severity'] == 'critical' and alert['status'] == 'firing' %}"
|
|
"@room<b><font color='red'>"
|
|
"{% elif alert['labels']['severity'] == 'warning' and alert['status'] == 'firing' %}"
|
|
"<b><font color='orange'>"
|
|
"{% elif alert['status'] == 'resolved' %}"
|
|
"<b><font color='green'> End of alert "
|
|
"{% else %}"
|
|
"<b><font>"
|
|
"{% endif %}"
|
|
"{{ alert['labels']['alertname'] }}: {{ alert['labels']['instance'] }} <br/>"
|
|
"</font></b>"
|
|
"{{ alert['annotations']['title'] }}<br/>"
|
|
"{{ alert['annotations']['description'] }}<br/>"
|
|
)
|
|
|
|
def load_templates(
|
|
config: Config
|
|
)->defaultdict[str, Template]:
|
|
"""
|
|
Create a dict mapping alert names to the template to use from
|
|
the config, with a default template either from the config file
|
|
or the default DEFAULT_TEMPLATE_RAW.
|
|
"""
|
|
if config.default_template is None:
|
|
default_template = Environment(
|
|
loader=BaseLoader
|
|
).from_string(
|
|
DEFAULT_TEMPLATE_RAW
|
|
)
|
|
else:
|
|
default_template = Environment(
|
|
loader=BaseLoader
|
|
).from_string(
|
|
config.default_template
|
|
)
|
|
templates = defaultdict(lambda: default_template)
|
|
for alert_name in config.templates:
|
|
templates[alert_name] = Environment(
|
|
loader=BaseLoader
|
|
).from_string(
|
|
config.templates[alert_name]
|
|
)
|
|
return templates
|
|
|
|
|
|
def format_alert(
|
|
alert_json: dict[str, Any],
|
|
templates: defaultdict[str, Template]
|
|
)->list[Message]:
|
|
"""
|
|
Format an alert in json format to a nice string.
|
|
"""
|
|
messages = []
|
|
for alert in alert_json['alerts']:
|
|
template = templates[alert['labels']['alertname']]
|
|
formated_body = template.render(alert=alert)
|
|
body = "alert {status}:\n{alertname} on {instance}".format(
|
|
status=alert['status'],
|
|
alertname=alert['labels']['alertname'],
|
|
instance=alert['labels']['instance']
|
|
)
|
|
if '@room' in formated_body:
|
|
body = '@room ' + body
|
|
formated_body = formated_body.replace('@room', '')
|
|
messages.append(Message(body, formated_body))
|
|
return messages
|
|
|
|
async def format_alerts(
|
|
alert_queue: asyncio.Queue[dict[str,Any]],
|
|
message_queue: asyncio.Queue[Message],
|
|
config: Config
|
|
)->NoReturn:
|
|
"""
|
|
Read alerts from alert_queue, format them, and put them in message_queue.
|
|
"""
|
|
templates = load_templates(config)
|
|
|
|
while True:
|
|
alert = await alert_queue.get()
|
|
messages = format_alert(alert, templates)
|
|
for message in messages:
|
|
await message_queue.put(message)
|
|
alert_queue.task_done()
|
|
|