nearxos/reterminal-dm4
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

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.

Browse Source
This commit is contained in:
nearxos
2026-02-18 18:55:32 +02:00
parent f93d224e8b
commit 5ff46e67d8
9 changed files with 302 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files

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