mirror of
https://github.com/home-assistant/operating-system.git
synced 2026-02-22 10:46:38 +00:00
787fc22f83
* Avoid moving data to same device When a data disk move is triggered when the data disk is already in use the script currently renames that only data disk, rendering the system unusable. Don't continue if source and destination happens to be the same device. * On failure rename to hassos-data-fail The label hassos-data-failed is too long.
50 lines
2.1 KiB
Bash
Executable File
50 lines
2.1 KiB
Bash
Executable File
#!/bin/sh
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# ==============================================================================
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# Home Assistant OS data partition migration script
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# ==============================================================================
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set -e
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# Rely on systemd-udev symlinks to find current data partition by fs label
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OLD_DEVICE_CHILD="$(readlink -f "/dev/disk/by-label/hassos-data")"
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# We cannot rely on systemd Wants/Requires since this is evaluated before
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# ConditionPathExists, and would make us wait for an external device on
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# every boot.
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# Instead, just start the unit here, which makes sure a device with the
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# partlabel "hassos-data-external" is present.
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if ! systemctl start "dev-disk-by\\x2dpartlabel-hassos\\x2ddata\\x2dexternal.device"; then
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echo "[ERROR] External data device ${NEW_DEVICE} not found!"
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exit 1
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fi
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# Rely on systemd-udev symlinks to find external data partition by partlabel
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NEW_DEVICE_CHILD="$(readlink -f "/dev/disk/by-partlabel/hassos-data-external")"
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# Check if target device is the current device
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if [ "${NEW_DEVICE_CHILD}" = "${OLD_DEVICE_CHILD}" ]; then
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echo "[ERROR] Home Assitant OS is already using this external data device!"
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exit 1
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fi
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NEW_DEVICE_PART_SIZE=$(cat "/sys/class/block/$(basename "${NEW_DEVICE_CHILD}")/size")
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OLD_DEVICE_PART_SIZE=$(cat "/sys/class/block/$(basename "${OLD_DEVICE_CHILD}")/size")
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if [ "${NEW_DEVICE_PART_SIZE}" -lt "${OLD_DEVICE_PART_SIZE}" ]; then
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echo "[ERROR] Target device too small!"
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exit 1
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fi
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echo "[INFO] Moving data from ${OLD_DEVICE_CHILD} to ${NEW_DEVICE_CHILD}"
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if ! e2image -ra -p "${OLD_DEVICE_CHILD}" "${NEW_DEVICE_CHILD}"; then
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echo "[ERROR] Copying data partition to external device failed!"
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# Rename partition to make sure HAOS does not try to mount a failed copy attempt.
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e2label "${NEW_DEVICE_CHILD}" hassos-data-fail || true
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exit 1
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fi
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# At this point we have two partition with the same fs label. Make sure
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# to rename the internal partition so we won't mount it anymore.
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echo "[INFO] Rename old hassos-data partition ${OLD_DEVICE_CHILD}"
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e2label "${OLD_DEVICE_CHILD}" hassos-data-old
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echo "[INFO] Data move has been completed successfully"
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