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volume-utils: per-volume-kind restorable floor (_config tars are legitimately tiny)

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The 1MB near-empty guard (added for purged-volume zstd stubs) rejected every
legitimate _config volume archive (cronos: 68KB), so any node whose registry
entry includes a _config volume reported Restorable: 0 despite healthy
multi-GB data backups (cronos had three; 14 registry entries carry _config
volumes). _config archives now pass at >=4KB; data volumes keep the 1MB floor.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
rob
2026-07-08 12:01:42 +00:00
parent cf26455d3a
commit 1ebabee93d
1 changed files with 14 additions and 3 deletions
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17
volume-utils.sh
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@@ -7,6 +7,17 @@
# zstd headers from purged/missing volumes must not win sort|tail newest selection).
MIN_RESTORABLE_BACKUP_BYTES=$((1024 * 1024))
# Config volumes hold a handful of small files: a legitimate config archive can sit
# far below the 1MB data floor (cronos: 68KB) while a purged-volume stub is a bare
# zstd header (<4KB). A flat 1MB floor made every node with a _config volume in its
# registry entry report "Restorable: 0" despite healthy multi-GB data backups.
min_restorable_bytes_for() {
case "$(basename "$1")" in
*_config-*.tar.zst) echo 4096 ;;
*) echo "$MIN_RESTORABLE_BACKUP_BYTES" ;;
esac
}
RPC_ENV_FILE="/root/rpc/.env"
backup_archive_size_bytes() {
@@ -19,7 +30,7 @@ is_restorable_backup_archive() {
local size
[[ -f "$file" ]] || return 1
size=$(backup_archive_size_bytes "$file")
[[ "$size" =~ ^[0-9]+$ ]] && (( size >= MIN_RESTORABLE_BACKUP_BYTES ))
[[ "$size" =~ ^[0-9]+$ ]] && (( size >= $(min_restorable_bytes_for "$file") ))
}
# Pick the lexicographically newest backup that is not near-empty (<1MB). Prints one
@@ -42,7 +53,7 @@ select_newest_local_backup() {
for f in "${files[@]}"; do
size=$(backup_archive_size_bytes "$f")
if [[ ! "$size" =~ ^[0-9]+$ ]] || (( size < MIN_RESTORABLE_BACKUP_BYTES )); then
if [[ ! "$size" =~ ^[0-9]+$ ]] || (( size < $(min_restorable_bytes_for "$f") )); then
echo "skip near-empty backup artifact: $(basename "$f") (${size:-0} bytes)" >&2
continue
fi
@@ -83,7 +94,7 @@ select_newest_remote_backup_from_list() {
[[ "$f" == "${volume_name}-"* ]] || continue
[[ "$f" == *.tar.zst ]] || continue
size=$(remote_backup_archive_size_bytes "$remote_source" "$f")
if [[ -z "$size" || ! "$size" =~ ^[0-9]+$ ]] || (( size < MIN_RESTORABLE_BACKUP_BYTES )); then
if [[ -z "$size" || ! "$size" =~ ^[0-9]+$ ]] || (( size < $(min_restorable_bytes_for "$f") )); then
echo "skip near-empty backup artifact: $f (${size:-unknown} bytes)" >&2
continue
fi