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bvandeusen 7468806bad feat: add host_agent plugin — push-model host resource monitoring
Lightweight stdlib-only Python agent runs on each monitored host,
collects CPU / memory / disk / load / uptime from /proc every 30s,
and POSTs signed payloads to the Roundtable ingest endpoint. One-line
curl-pipe installer creates a hardened systemd unit; admin UI manages
host registrations with rotate / revoke.

- agent.py: 370 LoC single-file daemon, ring buffer + exponential backoff
- ingest route: bearer-token auth, metric expansion into plugin_metrics
- install.sh.j2: systemd unit with NoNewPrivileges / ProtectSystem / ProtectHome
- settings UI: add host / rotate token / delete registration (admin-only)
- dashboard widgets: fleet-glance table + per-host history chart
- stale-agent scheduler: 60s log warning for agents past 180s silence

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-04-15 01:04:51 -04:00

33 lines
1.2 KiB
Python

# plugins/host_agent/models.py
from __future__ import annotations
import uuid
from datetime import datetime, timezone
from sqlalchemy import Column, String, DateTime, ForeignKey
from roundtable.models.base import Base
def _uuid() -> str:
return str(uuid.uuid4())
def _utcnow() -> datetime:
return datetime.now(timezone.utc)
class HostAgentRegistration(Base):
__tablename__ = "host_agent_registrations"
id = Column(String(36), primary_key=True, default=_uuid)
host_id = Column(String(36), ForeignKey("hosts.id", ondelete="CASCADE"),
unique=True, nullable=False)
token_hash = Column(String(64), nullable=False, unique=True, index=True)
token_created_at = Column(DateTime(timezone=True), nullable=False, default=_utcnow)
agent_version = Column(String(32), nullable=True)
kernel = Column(String(128), nullable=True)
distro = Column(String(128), nullable=True)
arch = Column(String(32), nullable=True)
last_seen_at = Column(DateTime(timezone=True), nullable=True)
created_at = Column(DateTime(timezone=True), nullable=False, default=_utcnow)
updated_at = Column(DateTime(timezone=True), nullable=False,
default=_utcnow, onupdate=_utcnow)