feat: traefik plugin migration (traefik_001_initial, depends_on core head)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

plugins/traefik/migrations/env.py

@@ -0,0 +1,75 @@
+# plugins/traefik/migrations/env.py
+"""Alembic env.py for the Traefik plugin.
+
+For standalone use during plugin development.
+At app startup, migration_runner.py uses the core env.py with version_locations.
+"""
+import asyncio
+import os
+import sys
+from pathlib import Path
+from logging.config import fileConfig
+
+from sqlalchemy import pool
+from sqlalchemy.engine import Connection
+from sqlalchemy.ext.asyncio import async_engine_from_config
+from alembic import context
+
+# Make fablednetmon importable
+sys.path.insert(0, str(Path(__file__).parent.parent.parent.parent))
+
+from fablednetmon.models.base import Base
+import fablednetmon.models  # noqa: F401 — core models
+from plugins.traefik.models import TraefikMetric  # noqa: F401 — plugin model
+
+config = context.config
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+target_metadata = Base.metadata
+
+
+def _get_url() -> str:
+    import yaml
+    cfg_path = os.environ.get("FABLEDNETMON_CONFIG", "config.yaml")
+    try:
+        with open(cfg_path) as f:
+            cfg = yaml.safe_load(f) or {}
+        url = cfg.get("database", {}).get("url", "")
+    except FileNotFoundError:
+        url = ""
+    return os.environ.get("FABLEDNETMON_DATABASE__URL", url)
+
+
+def run_migrations_offline() -> None:
+    context.configure(
+        url=_get_url(), target_metadata=target_metadata,
+        literal_binds=True, dialect_opts={"paramstyle": "named"},
+    )
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def do_run_migrations(connection: Connection) -> None:
+    context.configure(connection=connection, target_metadata=target_metadata)
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+async def run_async_migrations() -> None:
+    cfg = config.get_section(config.config_ini_section, {})
+    cfg["sqlalchemy.url"] = _get_url()
+    connectable = async_engine_from_config(cfg, prefix="sqlalchemy.", poolclass=pool.NullPool)
+    async with connectable.connect() as connection:
+        await connection.run_sync(do_run_migrations)
+    await connectable.dispose()
+
+
+def run_migrations_online() -> None:
+    asyncio.run(run_async_migrations())
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

plugins/traefik/migrations/versions/traefik_001_initial.py

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+# plugins/traefik/migrations/versions/traefik_001_initial.py
+"""Traefik metrics table
+
+Revision ID: traefik_001_initial
+Revises: (none — this is a branch off the core head via depends_on)
+Create Date: 2026-03-17
+"""
+from typing import Sequence, Union
+from alembic import op
+import sqlalchemy as sa
+
+revision: str = "traefik_001_initial"
+down_revision: Union[str, None] = None
+branch_labels: Union[str, Sequence[str], None] = "traefik"
+depends_on: Union[str, Sequence[str], None] = ("0003_ansible_runs",)
+
+
+def upgrade() -> None:
+    op.create_table(
+        "traefik_metrics",
+        sa.Column("id", sa.String(36), primary_key=True),
+        sa.Column("router_name", sa.String(255), nullable=False),
+        sa.Column("scraped_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("request_rate", sa.Float, nullable=False),
+        sa.Column("error_rate_4xx_pct", sa.Float, nullable=False),
+        sa.Column("error_rate_5xx_pct", sa.Float, nullable=False),
+        sa.Column("latency_p50_ms", sa.Float, nullable=False),
+        sa.Column("latency_p95_ms", sa.Float, nullable=False),
+        sa.Column("latency_p99_ms", sa.Float, nullable=False),
+    )
+    op.create_index("ix_traefik_metrics_router_scraped", "traefik_metrics",
+                    ["router_name", "scraped_at"])
+
+
+def downgrade() -> None:
+    op.drop_index("ix_traefik_metrics_router_scraped", "traefik_metrics")
+    op.drop_table("traefik_metrics")