Files
FabledSteward/plugins/host_agent/__init__.py
T
bvandeusenandClaude Opus 5.5 0742b7a2b7 feat(alerts): the metric catalog is written by what emits it (#5061)
#5061 "Metric catalog belongs to what emits: plugins register their
metrics; names match what is recorded".

- The static METRIC_CATALOG is gone. metric_catalog() is core's own sources
  (the four monitor types and "steward", the app's open_fds/open_fds_pct,
  which were recorded but never offered) plus each loaded plugin's
  get_alert_metrics() export. A disabled plugin's sources leave the picker.
- traefik offers what it records: error_rate_4xx_pct and error_rate_5xx_pct.
  The old "error_rate" was never recorded, so a rule on it could not fire.
- tests/core/test_metric_catalog.py walks every MetricBatch.add /
  record_metric call (traefik's tuple loop included) and fails on a recorded
  metric the catalog lacks; it shows on a synthetic writer that it can fail.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-06 12:55:55 -04:00

44 lines
1.1 KiB
Python

# plugins/host_agent/__init__.py
from __future__ import annotations
from typing import TYPE_CHECKING
if TYPE_CHECKING:
from quart import Quart
_app: "Quart | None" = None
def setup(app: "Quart") -> None:
global _app
_app = app
def get_scheduled_tasks() -> list:
from .scheduler import make_task
return [make_task(_app)]
def get_blueprint():
from .routes import host_agent_bp
return host_agent_bp
def register_mcp_tools(register) -> None:
from .mcp_tools import register_tools
register_tools(register)
async def mcp_overview(db) -> list[dict]:
from .mcp_tools import mcp_overview as findings
return await findings(db)
def get_alert_metrics() -> dict[str, list[str]]:
"""Host metrics ingest records for alert rules (resource = the host name;
disk_used_pct per mount, resource "<host>:<mount>")."""
return {"host_agent": [
"cpu_pct", "mem_used_pct", "mem_available_bytes", "swap_used_bytes",
"disk_used_pct_worst", "disk_used_pct", "load_1m", "load_5m", "load_15m",
"uptime_secs",
]}