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February 28, 2020 01:07
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libvirt / KVM Cheatsheet
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List Partitions in a QCOW2: | |
virt-filesystems -a /var/lib/libvirt/images/vpod1.qcow2 -l | |
Mount a Specific Partition from qcow2: | |
guestmount --ro -a /var/lib/libvirt/images/vpod1.qcow2 -m /dev/vg_ifc0/root /mnt/gm | |
guestunmount /mnt/gm | |
Create/Attach/Detach Disks: | |
# Create a disk of 22G | |
qemu-img create -f qcow2 /var/lib/libvirt/images/vmname-vdb.qcow2 22000M -o preallocation=full | |
## disk image is /var/lib/libvirt/images/vmname-vdb.qcow2 | |
## VM name is "vmname" | |
## destination is /dev/vdb | |
virsh attach-disk --domain vmname /var/lib/libvirt/images/vmname-vdb.qcow2 --target vdb --persistent --config --live | |
## Undo the above cmd | |
virsh detach-disk --domain vmname /var/lib/libvirt/images/vmname-vdb.qcow2 --persistent --config --live | |
# Creating Cfg Disk | |
rm /var/lib/libvirt/images/cfg.qcow2 | |
qemu-img create -f qcow2 /var/lib/libvirt/images/cfg.qcow2 2M -o preallocation=full | |
parted /var/lib/libvirt/images/cfg.qcow2 --script -- mklabel gpt | |
parted -a optimal /var/lib/libvirt/images/cfg.qcow2 --script -- mkpart primary ext2 1024KiB 4702s | |
sudo losetup -f /var/lib/libvirt/images/cfg.qcow2 | |
sudo losetup -o 1048576 -f /dev/loop0 | |
sudo mkfs.ext2 /dev/loop1 256 | |
sudo losetup -d /dev/loop1 | |
sudo losetup -d /dev/loop0 | |
parted /var/lib/libvirt/images/cfg.qcow2 --script -- print unit s | |
Add Network IF: | |
virsh attach-interface --domain vpod2 --type network --source default --model virtio --mac 52:53:54:55:56:57 --config --live | |
virsh detach-interface vpod2 --type network --mac 52:53:54:55:56:57 | |
https://www.cyberciti.biz/faq/how-to-install-kvm-on-centos-7-rhel-7-headless-server/ | |
https://blog.programster.org/kvm-cheatsheet |
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