43 lines
1.4 KiB
Plaintext
43 lines
1.4 KiB
Plaintext
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#!/bin/sh
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set -e
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dm_major=$(printf %x "$(grep device-mapper /proc/devices | cut -f 1 -d ' ')")
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case "$(stat -Lc %t:%T /dev/mapper/dmroot)" in
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ca:0)
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# nothing needed, xvda used directly
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;;
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ca:3)
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# resize partition table itself
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# use undocumented ---pretend-input-tty (yes, three '-') to
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# force unattended operation, otherwise it aborts on first
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# prompt, even with '-s' option
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echo fix | parted ---pretend-input-tty /dev/xvda print >/dev/null
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# then resize 3rd partition, even though it is mounted
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echo yes 100% | parted ---pretend-input-tty /dev/xvda resizepart 3
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# and reload partition table; prefer partprobe over blockdev
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# --rereadpt, as it works on mounted partitions
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partprobe /dev/xvda
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;;
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ca:*)
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echo "Unsupported partition layout, resize it manually" >&2
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exit 1
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;;
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$dm_major:*)
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new_size=$(cat /sys/block/xvda/size)
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ro=$(cat /sys/block/xvda/ro)
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if [ "$ro" -eq 1 ]; then
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new_table="0 $new_size snapshot /dev/xvda /dev/xvdc2 N 16"
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else
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new_table="0 $new_size linear /dev/xvda 0"
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fi
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dmsetup load dmroot --table "$new_table"
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dmsetup resume dmroot
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;;
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*)
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echo "Unsupported device type for root volume, resize it manually" >&2
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exit 1
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;;
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esac
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resize2fs /dev/mapper/dmroot
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