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− | {{Note/important|This is a work in progress}}
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| === Hot-adding a virtio volume to a running VM === | | === Hot-adding a virtio volume to a running VM === |
| virsh vol-create-as housetree jita-srv 20G | | virsh vol-create-as housetree jita-srv 20G |
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| sudo virsh start "name_of_vm" | | sudo virsh start "name_of_vm" |
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− | === Extending the disk file of a VM === | + | === Extending a raw disk image === |
| + | |
| + | This procedure applies to full-disk images containing an MBR partition table. |
| + | |
| + | '''NOTE: The VM using this disk MUST be shut down beforehand - or it will corrupt the filesystem!''' |
| + | |
| + | First, append some space at the end of the disk: |
| + | |
| + | dd if=/dev/zero bs=1M count=$((1024-256)) >>example-boot.img |
| + | |
| + | Then extend the partition to fill the entire disk: |
| + | |
| + | parted example-boot.img |
| + | |
| + | (parted) resizepart 1 |
| + | End? [267MB]? -1 |
| + | |
| + | (parted) p |
| + | Model: (file) |
| + | Disk /var/lib/libvirt/images/boot/example-boot.img: 1074MB |
| + | Sector size (logical/physical): 512B/512B |
| + | Partition Table: msdos |
| + | Disk Flags: |
| + | |
| + | Number Start End Size Type File system Flags |
| + | 1 1049kB 1073MB 1072MB primary ext4 boot |
| + | |
| + | (parted) quit |
| + | |
| + | Now create device nodes for the new partition table: |
| + | |
| + | # kpartx -av lightwave-boot-new.img |
| + | add map loop7p1 (253:4): 0 2093152 linear 7:7 2048 |
| + | |
| + | Grow the filesystem inside the partition (resize2fs requires an fsck beforehand): |
| + | |
| + | # e2fsck -f /dev/mapper/loop7p1 |
| + | # resize2fs /dev/mapper/loop7p1 |
| + | |
| + | Now loopback-mount your grown up filesystem to check if it's healthy: |
| + | |
| + | # mount /dev/mapper/loop7p1 /mnt |
| + | # df -h /mnt |
| + | Filesystem Size Used Avail Use% Mounted on |
| + | /dev/mapper/loop7p1 986M 112M 820M 12% /mnt |
| + | |
| + | Don't forget to unmount the filesystem and undefine the loopback devices! |
| + | |
| + | umount /mnt |
| + | kpartx -d lightwave-boot-new.img |
| + | |
| + | Et voilà! |
| + | |
| + | === Extending a QCOW disk file === |
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| Create a file containing the amount of space you want to add to the VM | | Create a file containing the amount of space you want to add to the VM |
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| sudo cat additional.raw >> "name_of_vm".raw | | sudo cat additional.raw >> "name_of_vm".raw |
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− | Page created by Steven M. Parrish
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− | Any questions find me on IRC in #sugar on freenode
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