88 lines
3.1 KiB
Org Mode
88 lines
3.1 KiB
Org Mode
#+INCLUDE: header.org
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* *~* QEMU e libvirt - comandi utili
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** Incrementa il disco virtuale della VM
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A macchina spenta, supponendo che l'immagine si chiami "macchina.qcow2":
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#+begin_src
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root@hypervisor # qemu-img resize /var/lib/libvirt/images/macchina.qcow2 +10G
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#+end_src
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Poi bisogna usare ~resize2fs /dev/vda1~, probabilmente rifacendo anche la
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partizione tramite fdisk. Un esempio:
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#+begin_src
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root@orazio ~# fdisk /dev/vda -l
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Disk /dev/vda: 60 GiB, 64424509440 bytes, 125829120 sectors
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Units: sectors of 1 * 512 = 512 bytes
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Sector size (logical/physical): 512 bytes / 512 bytes
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I/O size (minimum/optimal): 512 bytes / 512 bytes
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Disklabel type: gpt
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Disk identifier: 8E12E056-0076-4C2C-AC88-51E48D3D105E
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Device Start End Sectors Size Type
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/dev/vda1 2048 1050623 1048576 512M BIOS boot
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/dev/vda2 1050624 50331614 49280991 23.5G Linux filesystem
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#+end_src
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Nota come ~Disk /dev/vda: 60 GiB~ ma ~/dev/vda2 ... 23.5G~.
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#+begin_src
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root@orazio ~# fdisk /dev/vda
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Welcome to fdisk (util-linux 2.38.1).
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Changes will remain in memory only, until you decide to write them.
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Be careful before using the write command.
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This disk is currently in use - repartitioning is probably a bad idea.
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It's recommended to umount all file systems, and swapoff all swap
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partitions on this disk.
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Command (m for help): d
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Partition number (1,2, default 2): 2
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Partition 2 has been deleted.
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Command (m for help): p
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Disk /dev/vda: 60 GiB, 64424509440 bytes, 125829120 sectors
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Units: sectors of 1 * 512 = 512 bytes
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Sector size (logical/physical): 512 bytes / 512 bytes
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I/O size (minimum/optimal): 512 bytes / 512 bytes
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Disklabel type: gpt
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Disk identifier: 8E12E056-0076-4C2C-AC88-51E48D3D105E
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Device Start End Sectors Size Type
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/dev/vda1 2048 1050623 1048576 512M BIOS boot
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Command (m for help): n
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Partition number (2-128, default 2):
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First sector (1050624-125829086, default 1050624):
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Last sector, +/-sectors or +/-size{K,M,G,T,P} (1050624-125829086, default 125827071):
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Created a new partition 2 of type 'Linux filesystem' and of size 59.5 GiB.
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Partition #2 contains a ext4 signature.
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Do you want to remove the signature? [Y]es/[N]o: n
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Command (m for help): w
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The partition table has been altered.
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Syncing disks.
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root@orazio ~# resize2fs /dev/vda2
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resize2fs 1.47.0 (5-Feb-2023)
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Filesystem at /dev/vda2 is mounted on /; on-line resizing required
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old_desc_blocks = 3, new_desc_blocks = 8
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The filesystem on /dev/vda2 is now 15597056 (4k) blocks long.
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#+end_src
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Potrebbe anche presentarsi questo errore:
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#+begin_src
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root@orazio ~ # fdisk /dev/vda
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Welcome to fdisk (util-linux 2.38.1).
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Changes will remain in memory only, until you decide to write them.
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Be careful before using the write command.
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GPT PMBR size mismatch (50331647 != 125829119) will be corrected by write.
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The backup GPT table is not on the end of the device. This problem will be corrected by write.
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This disk is currently in use - repartitioning is probably a bad idea.
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It's recommended to umount all file systems, and swapoff all swap
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partitions on this disk.
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#+end_src
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In tal caso semplicemente riscrivi la tavola premendo ~w~ e ricomincia la procedura.
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