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restore: gate static-file offload on SLOWDISK env var (.env), not just /slowdisk presence

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A `/slowdisk` directory exists on hosts even when it is just a folder on the root disk
(no dedicated extra disk) — offloading there gives no benefit. Source the host .env and
require SLOWDISK to be set (operator sets it only on hosts with a real extra disk mounted
at /slowdisk) before activating the static-file -> /slowdisk symlink offload. Unset =
normal extract everywhere. Target path stays /slowdisk (the fixed in-container mount).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Claude Agent
2026-06-15 04:39:48 +00:00
parent a9e8fba794
commit 3caa4ab873
1 changed files with 8 additions and 1 deletions
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9
restore-volumes.sh
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@@ -1,6 +1,10 @@
#!/bin/bash
dir="$(dirname "$0")"
source "$dir/volume-utils.sh"
# Host config: SLOWDISK gates the static-file offload (see prep_static_offload). It must be
# set ONLY on hosts that have a real dedicated extra disk mounted at /slowdisk; on hosts
# where /slowdisk is just a folder on the root disk, offloading gives no benefit.
[ -f "$dir/.env" ] && source "$dir/.env"
remote_source="$2"
if [[ -n "$remote_source" ]] && is_local_backup_url "$remote_source"; then
@@ -24,9 +28,12 @@ fi
# hot/dynamic state stays on the primary disk. tar then extracts THROUGH the symlinks via
# --keep-directory-symlink (it keeps the dir-symlinks instead of clobbering them).
# Target naming matches delete-volumes.sh / delete_slowdisk_targets_for_key cleanup.
# Safe fallbacks (just extract normally): no /slowdisk, no manifest, or no static paths.
# GATED on the SLOWDISK env var from .env: only hosts with a real dedicated extra disk set
# it. Safe fallbacks (just extract normally): SLOWDISK unset, /slowdisk missing, no manifest,
# or no static paths. (/slowdisk is the fixed in-container mount, so the target path is fixed.)
prep_static_offload() {
local key=$1 meta=$2 data_dir=$3 rel target
[ -n "${SLOWDISK:-}" ] || { echo " SLOWDISK not set in .env (no dedicated extra disk) — no static offload"; return 0; }
[ -d /slowdisk ] || { echo " /slowdisk absent — no static offload"; return 0; }
[ -f "$meta" ] || { echo " no manifest ($meta) — no static offload"; return 0; }
# manifest data lines (after the 3-line header) are "<size> <relpath>"