Talk:LiveOS image: Difference between revisions

Line 17:

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

<nowiki>dmsetup suspend top

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

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

~~dmsetup status~~

~~dmsetup remove~~ mergeomatic</nowiki>

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

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.

dmsetup status

Step 5: Remove the merge target.

dmsetup remove mergeomatic

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

Line 29:

Line 33:

chroot .</nowiki>

Step 5: Clean up.

Step 7: Clean up.

<nowiki>cd ..

umount root

Line 38:

Line 42:

umount squashfs/</nowiki>

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

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>

Sources: <br>

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

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

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

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

@@ Line 17: / Line 17: @@
 Step 3: Stop the snapshot device and merge the snapshot with the base
   <nowiki>dmsetup suspend top
-echo 0 $(blockdev --getsize /dev/loop2) snapshot-merge /dev/loop2 /dev/loop3 p 8 | dmsetup create mergeomatic && dmsetup status mergeomatic
+echo 0 $(blockdev --getsize /dev/loop2) snapshot-merge /dev/loop2 /dev/loop3 p 8 | dmsetup create mergeomatic && dmsetup status mergeomatic</nowiki>
-dmsetup status
-dmsetup remove mergeomatic</nowiki>
-Step 4: Set the top device to no snapshot, and inspect the filesystem for results, if desired.
+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.
+ dmsetup status
+Step 5: Remove the merge target.
+ dmsetup remove mergeomatic
+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
@@ Line 29: / Line 33: @@
 chroot .</nowiki>
-Step 5: Clean up.
+Step 7: Clean up.
   <nowiki>cd ..
 umount root
@@ Line 38: / Line 42: @@
 umount squashfs/</nowiki>
-Step 6: Copy the root filesystem image back into the squashfs image, you may need -noappend
+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>
+Sources: <br>
+*http://smorgasbord.gavagai.nl/2010/03/online-merging-of-cow-volumes-with-dm-snapshot <br>
+*http://www.kernel.org/doc/Documentation/device-mapper/snapshot.txt<br>
+*http://linuxgazette.net/114/kapil.html<br>
+--[[User:Andrew Gilmore|Andrew Gilmore]]