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Talk:LiveOS image (view source)

Revision as of 11:51, 19 August 2012

453 bytes added , 11:51, 19 August 2012

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Step 3: Stop the snapshot device and merge the snapshot with the base

<nowiki>dmsetup suspend top

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echo 0 $(blockdev --getsize /dev/loop2) snapshot-merge /dev/loop2 /dev/loop3 p 8 | dmsetup create mergeomatic && dmsetup status ~~mergeomatic~~

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echo 0 $(blockdev --getsize /dev/loop2) snapshot-merge /dev/loop2 /dev/loop3 p 8 | dmsetup create mergeomatic && dmsetup status mergeomatic</nowiki>

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~~dmsetup status~~

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~~dmsetup remove~~ mergeomatic</nowiki>

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Step 4: Set the top device to no snapshot, and inspect the filesystem for results, if desired.

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Step 4: Wait for merge to complete. When the status report on mergeomatic reports allocated blocks equal to the metadata blocks, the merge is finished.

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dmsetup status

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Step 5: Remove the merge target.

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dmsetup remove mergeomatic

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Step 6: Set the top device to no snapshot, and inspect the filesystem for results, if desired.

<nowiki>echo 0 $(blockdev --getsize /dev/loop2) linear /dev/loop2 0 | dmsetup load top

dmsetup resume top

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chroot .</nowiki>

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Step 5: Clean up.

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Step 7: Clean up.

<nowiki>cd ..

umount root

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umount squashfs/</nowiki>

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Step 6: Copy the root filesystem image back into the squashfs image, you may need -noappend

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Step 8: Copy the root filesystem image back into the squashfs image, you may need -noappend

<nowiki>mkdir LiveOS

mv ext3fs.img LiveOS

rm /run/media/*/LIVE/LiveOS/squashfs.img

mksquashfs LiveOS /run/media/*/LIVE/LiveOS/squashfs.img -keep-as-directory</nowiki>

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Sources: <br>

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*http://smorgasbord.gavagai.nl/2010/03/online-merging-of-cow-volumes-with-dm-snapshot <br>

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*http://www.kernel.org/doc/Documentation/device-mapper/snapshot.txt<br>

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*http://linuxgazette.net/114/kapil.html<br>

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--[[User:Andrew Gilmore|Andrew Gilmore]]

Andrew Gilmore

7

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