Sysadmin/Add resources to a VM

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Hot-adding a virtio volume to a running VM

virsh vol-create-as housetree jita-srv 20G
virsh attach-disk  jita /dev/housetree/jita-srv vdb

Adding memory to a VM

Shutdown the VM

sudo virsh shutdown "name_of_vm"

Edit the configuration of the VM

sudo virsh edit "name_of_vm"
...
  <memory>XXXXXX</memory>    <--- XXXXXX is (number of gigabytes of memory * 1024 * 1024)
  <currentMemory>XXXXXX</currentMemory>    <--- XXXXXX Should be the same as the previous line

Start the VM

sudo virsh start "name_of_vm"

Extending the disk file of a VM

Create a file containing the amount of space you want to add to the VM

sudo qemu-img create -f raw additional.raw <size>

Shutdown the VM ----- DO NOT SKIP THIS STEP. YOU WILL CORRUPT THE VM IF YOU DO THIS WHILE IT IS RUNNING

sudo virsh shutdown "name_of_vm"

Convert the VM to raw if needed

sudo qemu-img convert -f "name_of_vm".qcow2 -O raw "name_of_vm".raw

Add the additional space to the VM

sudo cat additional.raw >> "name_of_vm".raw