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Add backup shrinking functionality to eMMC provisioning dashboard: implement API for shrinking raw .img backups using PiShrink, update UI to support shrink option after backup, and enhance documentation for backup image handling and storage options on Proxmox host.

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nearxos
2026-02-18 18:55:32 +02:00
parent f93d224e8b
commit 5ff46e67d8
9 changed files with 302 additions and 20 deletions
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4
chromium-setup/emmc-provisioning/host/cm4-flash.service
View File

@@ -13,8 +13,8 @@ ExecStart=/opt/cm4-provisioning/flash-emmc-on-connect.sh
User=root
StandardOutput=journal
StandardError=journal
# Allow long run (rpiboot + device scan + wait for user choice)
TimeoutStartSec=900
# Allow long run: rpiboot + wait for choice + dd 32GB (~20–35 min) + optional PiShrink (~15–30 min)
TimeoutStartSec=7200
[Install]
# Only started by udev trigger, not at boot

44
chromium-setup/emmc-provisioning/host/flash-emmc-on-connect.sh
View File

@@ -57,6 +57,10 @@ fi
# When a device is detected we ask the user (dashboard): Backup or Deploy?
# These files are used to wait for the user's choice (written by dashboard, read by this script).
BACKUPS_DIR="${BACKUPS_DIR:-/var/lib/cm4-provisioning/backups}"
# Optional: shrink backup with PiShrink (requires pishrink + parted, e2fsprogs). SHRINK_BACKUP=1 to enable.
SHRINK_BACKUP="${SHRINK_BACKUP:-0}"
# If SHRINK_BACKUP=1, optionally compress: PISHRINK_COMPRESS=gz or xz (uses parallel when available). Uncompressed .img can be dd'd directly for deploy.
PISHRINK_COMPRESS="${PISHRINK_COMPRESS:-}"
ACTION_REQUEST_FILE="${ACTION_REQUEST_FILE:-/var/lib/cm4-provisioning/action_request}"
CURRENT_DEVICE_FILE="${CURRENT_DEVICE_FILE:-/var/lib/cm4-provisioning/current_device}"
DEVICE_SOURCE_FILE="${DEVICE_SOURCE_FILE:-/var/lib/cm4-provisioning/device_source}"
@@ -163,8 +167,44 @@ for (( i = 0; i < WAIT_TIMEOUT; i += 2 )); do
write_status "backup" "Creating backup…" "null"
log "Backing up $target_dev to $backup_path..."
if dd if="$target_dev" of="$backup_path" bs=4M status=progress conv=fsync; then
log "Backup complete: $backup_path"
write_status "done" "Backup complete: $backup_name" "100"
final_name="$backup_name"
shrink_requested=false
[[ "$SHRINK_BACKUP" == "1" || "$SHRINK_BACKUP" == "true" ]] && shrink_requested=true
[[ -f "$(dirname "$STATUS_FILE")/shrink_next_backup" ]] && shrink_requested=true
rm -f "$(dirname "$STATUS_FILE")/shrink_next_backup" 2>/dev/null || true
if [[ "$shrink_requested" == "true" ]]; then
pishrink_cmd=""
for p in /usr/local/bin/pishrink.sh /usr/local/bin/pishrink; do
[[ -x "$p" ]] && pishrink_cmd="$p" && break
done
if [[ -n "$pishrink_cmd" ]]; then
write_status "backup" "Shrinking backup image…" "null"
log "Shrinking backup with PiShrink (timeout 30 min)..."
pishrink_opts="-n"
[[ "$PISHRINK_COMPRESS" == "gz" || "$PISHRINK_COMPRESS" == "gzip" ]] && pishrink_opts="$pishrink_opts -z -a"
[[ "$PISHRINK_COMPRESS" == "xz" ]] && pishrink_opts="$pishrink_opts -Z -a"
PISHRINK_TIMEOUT="${PISHRINK_TIMEOUT:-1800}"
if timeout "$PISHRINK_TIMEOUT" $pishrink_cmd $pishrink_opts "$backup_path" 2>&1; then
if [[ "$PISHRINK_COMPRESS" == "gz" || "$PISHRINK_COMPRESS" == "gzip" ]]; then
final_name="${backup_name}.gz"
elif [[ "$PISHRINK_COMPRESS" == "xz" ]]; then
final_name="${backup_name}.xz"
fi
log "Shrunk backup: $BACKUPS_DIR/$final_name"
else
rc=$?
if [[ "$rc" -eq 124 ]]; then
log "PiShrink timed out after ${PISHRINK_TIMEOUT}s; keeping full backup $backup_path"
else
log "PiShrink failed (exit $rc); keeping full backup $backup_path"
fi
fi
else
log "SHRINK_BACKUP=1 but pishrink not found; keeping full backup. Install with scripts/install-pishrink-on-host.sh"
fi
fi
log "Backup complete: $BACKUPS_DIR/$final_name"
write_status "done" "Backup complete: $final_name" "100"
else
write_status "error" "Backup failed" "null" "dd failed"
fi