deytenit
07a53b9b2f
Swap the restic core service for resticontainer (ghcr.io/deytenit/resticontainer:0.19.1): per-service backup intent via restic.* compose labels (paths / stop / pre+post hooks), docker socket + /:/hostfs:ro to resolve container mounts to host paths and snapshot the union in one restic run. backup/run drops explicit /data/tier1,2 args (paths now come from labels), keeps init/forget/notify, and guards on a fresh snapshot. Snapshots are stamped --host <node>.apex.ermnvldmr.com --tag biweekly and written with --compression max.
78 lines
4.3 KiB
Python
78 lines
4.3 KiB
Python
# actions/backup/run.py
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"""Label-driven restic backup via resticontainer (github.com/deytenit/resticontainer).
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Runs the resticontainer core service one-shot: init-if-needed -> backup (discovers
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`restic.*`-labelled services, runs their pre-hooks/stops, snapshots the union of the
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resolved host paths in a single restic run) -> forget --prune -> Telegram. Every
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non-`backup` subcommand passes straight through to restic, so init/snapshots/forget
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behave exactly as before."""
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import json
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import os
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from engine.descriptor import Meta, Arg
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METADATA = Meta(summary="Run the resticontainer label-driven backup (init-if-needed, backup, forget --prune).",
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args=[Arg("telegram_bot_url", "Telegram Bot URL for notifications")])
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TITLE = "Restic Host Backup"
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def run(ctx, args):
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log, node, url = ctx.log, ctx.node.name, args.telegram_bot_url
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core = ctx.paths.core
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host = f"{node}.apex.ermnvldmr.com" # restic --host: the per-node public name (matches the bucket)
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tag = "biweekly" # restic --tag: snapshot cadence (this cron fires on the 5th & 20th)
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if not os.path.isfile(os.path.join(core, "docker-compose.yml")):
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log.error(f"Core compose not found in {core}"); raise SystemExit(1)
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env = dict(os.environ, COMPOSE_PROFILES="manual")
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env.update({k: v for k, v in ctx.vars().items() if k.startswith("APEX_")}) # tier paths, identity
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envfiles = []
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for ef in (".env", "apex.env"): # secrets (.env) + committed scalars (apex.env)
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if os.path.isfile(os.path.join(core, ef)):
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envfiles += ["--env-file", ef]
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def restic(*cmd, check=True, capture=False):
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return ctx.sys.run(["docker", "compose", *envfiles, "--profile", "manual",
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"run", "--rm", "-T", "resticontainer", *cmd],
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cwd=core, env=env, check=check, capture=capture)
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def host_snapshot_ids():
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"""This host's snapshot IDs, or None if it can't be determined (never fail on this)."""
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cp = restic("snapshots", "--host", host, "--json", check=False, capture=True)
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if cp.returncode != 0:
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return None
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try:
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return {s.get("id") for s in json.loads(cp.stdout or "[]")}
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except (ValueError, TypeError):
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return None
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try:
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log.info("Checking restic repository availability...")
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if restic("snapshots", check=False).returncode == 0:
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log.info("Restic repository reachable.")
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elif restic("init", check=False).returncode != 0:
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ctx.notify.error(TITLE, url, "restic init failed", node); raise SystemExit(1)
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before = host_snapshot_ids()
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log.info("Backing up `restic.*`-labelled services (resticontainer discovers paths)...")
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if restic("backup", "--host", host, "--tag", tag, "--compression", "max",
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check=False).returncode != 0:
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ctx.notify.error(TITLE, url, "restic backup failed", node); raise SystemExit(1)
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# Guard: the label-driven backup is a silent no-op if no service carries the
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# `restic.enable` label (resticontainer finds zero paths and skips restic).
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# Prove a fresh snapshot for this host actually landed before we prune/notify.
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after = host_snapshot_ids()
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if before is not None and after is not None and not (after - before):
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log.error("No new snapshot produced — refusing to report success.")
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ctx.notify.error(TITLE, url,
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"backup produced no new snapshot (no restic.* labels discovered?)", node)
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raise SystemExit(1)
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log.info("Applying retention (forget --prune)...")
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if restic("forget", "--prune", "--keep-daily", "7", "--keep-weekly", "4",
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"--keep-monthly", "12", check=False).returncode != 0:
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ctx.notify.error(TITLE, url, "restic forget/prune failed", node); raise SystemExit(1)
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log.success("Restic backup completed.")
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if not ctx.notify.success(TITLE, url, f"Restic backup + retention succeeded for {node}", node):
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raise SystemExit(1) # bash exited 1 when the success telegram failed to send
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except SystemExit:
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raise
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except Exception as e:
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log.error(f"{type(e).__name__}: {e}")
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ctx.notify.error(TITLE, url, f"backup failed: {e}", node)
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raise SystemExit(1)
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