Files
FabledSteward/plugins/docker/__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

72 lines
2.6 KiB
Python

# plugins/docker/__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
from .models import DockerContainer, DockerMetric # noqa: F401 — register with Base
# Publish the per-host persist hook so the host agent can hand off the
# `docker` array from each sample without importing our models (opportunistic
# synergy — host_agent gates on has_capability and no-ops if we're disabled).
# required_role=viewer: this is a trusted server-side data-plane write driven
# by the authenticated agent ingest, not a user-facing privileged action.
from steward.core.capabilities import register_capability
from steward.models.users import UserRole
from .ingest import persist_host_docker
from .retention import run_docker_retention
register_capability(
"docker.persist_host_samples", persist_host_docker,
label="Persist host Docker samples",
description="Store per-host container state + metrics pushed by the host agent.",
required_role=UserRole.viewer,
)
# Roll up + prune Docker time-series, driven by the core cleanup task without
# it importing our models. Same trusted server-side data-plane role as above.
register_capability(
"docker.run_retention", run_docker_retention,
label="Run Docker retention",
description="Roll up old docker_metrics to hourly + prune stale metrics/events.",
required_role=UserRole.viewer,
)
def get_scheduled_tasks() -> list:
# Collection is now agent-driven (pushed to the host_agent ingest); the
# central socket scrape was removed. No periodic task to register.
return []
def get_blueprint():
from .routes import docker_bp
return docker_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_nav() -> list[dict]:
# Surfaces in the sidebar's Infrastructure group (fleet-wide container view).
return [{"label": "Docker", "href": "/plugins/docker/"}]
def get_alert_metrics() -> dict[str, list[str]]:
"""What ingest.py records per container (resource "<host>/<container>"):
restart_count is cumulative (alert on crash-looping); is_healthy is 1.0 /
0.0 from the container's HEALTHCHECK, only for containers that define one."""
return {"docker": ["cpu_pct", "mem_pct", "restart_count", "is_healthy"]}