On Sun, May 11, 2014 at 07:02:04PM -0500, Peng Yu wrote:
Hi, The following blocks are from a guest. I have the block mintaka--vg-swap_1 which I want to remove (it was created when the guest was first made). Then I want the freed space be allocated to mintaka--vg-root (so that it will be expanded to 7.7GB). Does anybody know what I should do? (I know that this is not related to the usage of virsh, but I'm not sure where I should ask this question as I don't quite understand how /dev/mapper works) Thanks.
So, from what I see below, you managed to do a swapoff on the swap_1 and you want to just remove it and use the space for root, right? I'm assuming it's in a virtual machine, but it shouldn't really matter. To understand what happens here and "how /dev/mapper works", see some tutorial on logical volumes, etc. you can remove the LV (swap_1) from the VG (mintaka-vg) using 'lvremove', then lvresize the root LV (root_1) and of course, resize the filesystem underneath (/) as well. For virtual machines, you can use virt-resize from libguestfs as well, which makes it even easier, I'd say. However, I'm not writing all the commands here since I don't remember perfectly what's the synopsys and whether there were any caveats, nor am I that familiar with virt-resize (and its friends), however "resizing an lv" is more than enough to google if you need more guidance than this mail (and appropriate man pages). Hope that helps, Martin
pengy@saiph:~$ lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sr0 11:0 1 1024M 0 rom vda 253:0 0 50G 0 disk ├─vda1 253:1 0 243M 0 part /boot ├─vda2 253:2 0 1K 0 part └─vda5 253:5 0 7.8G 0 part ├─mintaka--vg-root (dm-0) 252:0 0 3.7G 0 lvm / └─mintaka--vg-swap_1 (dm-1) 252:1 0 4G 0 lvm vdb 253:16 0 256G 0 disk └─vdb1 253:17 0 256G 0 part [SWAP] pengy@saiph:~$ ll /dev/mapper/mintaka--vg-swap_1 lrwxrwxrwx 1 root root 7 May 11 18:53 /dev/mapper/mintaka--vg-swap_1 -> ../dm-1 pengy@saiph:~$ df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/mintaka--vg-root 3.7G 3.4G 78M 98% / none 4.0K 0 4.0K 0% /sys/fs/cgroup udev 106G 12K 106G 1% /dev tmpfs 22G 392K 22G 1% /run none 5.0M 0 5.0M 0% /run/lock none 106G 0 106G 0% /run/shm none 100M 0 100M 0% /run/user /dev/vda1 236M 88M 136M 40% /boot pengy@saiph:~$ swapon -s Filename Type Size Used Priority /dev/vdb1 partition 268435420 0 -1 pengy@saiph:~$ blkid /dev/vda1: UUID="df99ebcd-2dcf-4703-ae7c-0e5ec48cc4ca" TYPE="ext2" /dev/vda5: UUID="Uz8Imz-aADL-420e-CWo1-sdrS-Zufj-1UFF5u" TYPE="LVM2_member" /dev/vdb1: UUID="730e895a-d3ad-4911-993f-dae39a190271" TYPE="swap" /dev/mapper/mintaka--vg-root: UUID="4bc04e08-add6-4f92-868f-81dce4560adc" TYPE="ext4" /dev/mapper/mintaka--vg-swap_1: UUID="302daede-eb31-4db5-ad17-6d048931e86e" TYPE="swap" pengy@saiph:~$ sudo fdisk -l Disk /dev/vda: 53.7 GB, 53687091200 bytes 16 heads, 63 sectors/track, 104025 cylinders, total 104857600 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0008a759 Device Boot Start End Blocks Id System /dev/vda1 * 2048 499711 248832 83 Linux /dev/vda2 501758 16775167 8136705 5 Extended /dev/vda5 501760 16775167 8136704 8e Linux LVM Disk /dev/vdb: 274.9 GB, 274877906944 bytes 16 heads, 63 sectors/track, 532610 cylinders, total 536870912 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/vdb1 63 536870911 268435424+ 83 Linux Disk /dev/mapper/mintaka--vg-root: 4005 MB, 4005560320 bytes 255 heads, 63 sectors/track, 486 cylinders, total 7823360 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/mapper/mintaka--vg-root doesn't contain a valid partition table Disk /dev/mapper/mintaka--vg-swap_1: 4290 MB, 4290772992 bytes 255 heads, 63 sectors/track, 521 cylinders, total 8380416 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/mapper/mintaka--vg-swap_1 doesn't contain a valid partition table -- Regards, Peng _______________________________________________ virt-tools-list mailing list virt-tools-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/virt-tools-list
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