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https://git.selfprivacy.org/SelfPrivacy/selfprivacy-rest-api.git
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125 lines
4 KiB
Python
125 lines
4 KiB
Python
"""Prometheus monitoring queries."""
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# pylint: disable=too-few-public-methods
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import requests
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import strawberry
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from strawberry.scalars import JSON
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from dataclasses import dataclass
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from typing import Optional
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from datetime import datetime, timedelta
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PROMETHEUS_URL = "http://localhost:9001"
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@strawberry.type
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@dataclass
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class PrometheusQueryResult:
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result_type: str
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result: JSON
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class PrometheusQueries:
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@staticmethod
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def _send_query(query: str, start: int, end: int, step: int):
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try:
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response = requests.get(
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f"{PROMETHEUS_URL}/api/v1/query",
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params={
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"query": query,
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"start": start,
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"end": end,
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"step": step,
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},
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)
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if response.status_code != 200:
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raise Exception("Prometheus returned unexpected HTTP status code")
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json = response.json()
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return PrometheusQueryResult(
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result_type=json["result_type"], result=json["result"]
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)
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except Exception as error:
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raise Exception("Prometheus request failed! " + str(error))
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@staticmethod
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def cpu_usage(
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start: Optional[int] = None,
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end: Optional[int] = None,
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step: int = 60, # seconds
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) -> PrometheusQueryResult:
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"""
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Get CPU information.
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Args:
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start (int, optional): Unix timestamp indicating the start time.
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Defaults to 20 minutes ago if not provided.
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end (int, optional): Unix timestamp indicating the end time.
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Defaults to current time if not provided.
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step (int): Interval in seconds for querying disk usage data.
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"""
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if not start:
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start = int((datetime.now() - timedelta(minutes=20)).timestamp())
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if not end:
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end = int(datetime.now().timestamp())
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query = '100 - (avg by (instance) (rate(node_cpu_seconds_total{mode="idle"}[5m])) * 100)'
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return PrometheusQueries._send_query(query, start, end, step)
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@staticmethod
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def memory_usage(
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start: Optional[int] = None,
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end: Optional[int] = None,
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step: int = 60, # seconds
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) -> PrometheusQueryResult:
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"""
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Get memory usage.
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Args:
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start (int, optional): Unix timestamp indicating the start time.
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Defaults to 20 minutes ago if not provided.
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end (int, optional): Unix timestamp indicating the end time.
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Defaults to current time if not provided.
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step (int): Interval in seconds for querying memory usage data.
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"""
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if not start:
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start = int((datetime.now() - timedelta(minutes=20)).timestamp())
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if not end:
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end = int(datetime.now().timestamp())
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query = "100 - (100 * (node_memory_MemAvailable_bytes / node_memory_MemTotal_bytes))"
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return PrometheusQueries._send_query(query, start, end, step)
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@staticmethod
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def disk_usage(
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start: Optional[int] = None,
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end: Optional[int] = None,
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step: int = 60, # seconds
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) -> PrometheusQueryResult:
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"""
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Get disk usage information.
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Args:
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start (int, optional): Unix timestamp indicating the start time.
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Defaults to 20 minutes ago if not provided.
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end (int, optional): Unix timestamp indicating the end time.
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Defaults to current time if not provided.
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step (int): Interval in seconds for querying disk usage data.
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"""
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if not start:
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start = int((datetime.now() - timedelta(minutes=20)).timestamp())
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if not end:
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end = int(datetime.now().timestamp())
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query = """100 - (100 * sum by (device) (node_filesystem_avail_bytes{fstype!="rootfs"}) / sum by (device) (node_filesystem_size_bytes{fstype!="rootfs"}))"""
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return PrometheusQueries._send_query(query, start, end, step)
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