Add kvm automation

kvm/add-drive.sh

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+#!/bin/sh
+
+# Check if hypervisor is installed
+if [ -z "$(which virsh)" ]
+then
+    echo "libvirt is not installed."
+    exit 1
+# Check if running as root or privileged user
+elif [ -z "$(groups | tr ' ' '\n' | grep libvirt)" ] && [ "$EUID" -ne 0 ]
+then
+    echo "Please run as root or user under 'libvirt' group."
+    exit 2
+fi
+
+# Set pool to default path 
+if [ -z "${IMAGE_POOL}" ]
+then
+    if [ "$EUID" -ne 0 ]
+    then
+        echo "Please run as root."
+        exit 2
+    fi
+    IMAGE_POOL=$(virsh pool-dumpxml default | awk -F'[<>]' '/path/ {print $3}')
+fi
+
+# Variables
+base_dir=$(dirname $0)
+vm_name=$1
+image_uri=$2
+new_dev=$3
+
+# Read in array of current VMs
+read -r -a vms <<< "$(virsh list --name --all | tr '\n' ' ')"
+
+# Find specified VM
+vm_found=0
+for vm in ${vms[@]}
+do
+    if [ "${vm}" == "${vm_name}" ]
+    then
+        vm_found=1
+        break
+    fi
+done
+
+# Throw error if specified VM is not found
+if [[ $vm_found -ne 1 ]]
+then
+    echo "'${vm_name}' does not exist."
+    exit 3
+fi
+
+# Select target bus based on target device name, error if 
+# device name prefix does not match a compatible bus.
+if [[ $new_dev = vd* ]]
+then
+    targetbus=virtio
+elif [[ $new_dev = sd* ]]
+then
+    targetbus=sata
+else
+    echo "dev prefix '${new_dev:0:2}' is not valid."
+    exit 4
+fi
+
+# If uri to disk image is a local path append the file:// to uri (if not already there)
+if [[ ! $image_uri = http://* ]] && [[ ! $image_uri = https://* ]] && [[ ! $image_uri = file://* ]]
+then
+    image_uri=$([[ $image_uri = /* ]] && echo "file://${image_uri}" || echo "file://${PWD}/${image_uri}")
+fi
+
+# Read all devices with same prefix as specified name for the new device
+read -r -a existing_dev <<< "$(virsh domblklist ${vm_name} | awk '{print $1}' | grep -e ${new_dev:0:2} | tr '\n' ' ')"
+
+# Check if specified device name match any existing ones, if so throw error to user
+for dev in ${existing_dev[@]}
+do
+    if [ "${dev}" == "${new_dev}" ]
+    then
+        echo "'${new_dev}' already exists, please specific disk target labeled past '${existing_dev[-1]}'."
+        exit 5
+    fi
+done
+
+# Make image path, /path/to/pool/{vm-name}_{random-hash-string}.qcow2
+disk_path=${IMAGE_POOL}/${vm_name}_$(echo ${RANDOM} | md5sum | head -c 15; echo;).qcow2
+
+# If disk path exists, regenerate a new until it does not exist
+while [ -f $disk_path ]
+do
+    disk_path=${IMAGE_POOL}/${vm_name}_$(echo ${RANDOM} | md5sum | head -c 15; echo;).qcow2
+done
+
+# Download / Copy template disk image from uri to disk path
+curl -L $image_uri -o $disk_path
+
+# Attach disk at disk path to the vm specified
+virsh attach-disk $vm_name $disk_path $new_dev --persistent --driver=qemu --subdriver=qcow2 --targetbus=$targetbus

kvm/config/rockylinux.xml

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+<!-- 
+  rockylinux template 
+  Author: Michael Valdron
+  Created on: 2022-06-07
+-->
+<domain type='kvm'>
+  <name>rockylinux-temp</name>
+  <metadata>
+    <libosinfo:libosinfo xmlns:libosinfo="http://libosinfo.org/xmlns/libvirt/domain/1.0">
+      <libosinfo:os id="http://rockylinux.org/rocky/8-unknown"/>
+    </libosinfo:libosinfo>
+  </metadata>
+  <memory unit='KiB'>2097152</memory>
+  <currentMemory unit='KiB'>2097152</currentMemory>
+  <vcpu placement='static'>2</vcpu>
+  <os>
+    <type arch='x86_64' machine='pc-q35-6.1'>hvm</type>
+    <loader readonly='yes' type='pflash'>/usr/share/edk2/ovmf/OVMF_CODE.fd</loader>
+    <nvram>/var/lib/libvirt/qemu/nvram/rockylinux_VARS.fd</nvram>
+  </os>
+  <features>
+    <acpi/>
+    <apic/>
+    <vmport state='off'/>
+  </features>
+  <cpu mode='host-model' check='partial'>
+    <topology sockets='1' dies='1' cores='2' threads='1'/>
+  </cpu>
+  <clock offset='utc'>
+    <timer name='rtc' tickpolicy='catchup'/>
+    <timer name='pit' tickpolicy='delay'/>
+    <timer name='hpet' present='no'/>
+  </clock>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <pm>
+    <suspend-to-mem enabled='no'/>
+    <suspend-to-disk enabled='no'/>
+  </pm>
+  <devices>
+    <emulator>/usr/bin/qemu-system-x86_64</emulator>
+    <controller type='usb' index='0' model='qemu-xhci' ports='15'>
+      <address type='pci' domain='0x0000' bus='0x03' slot='0x00' function='0x0'/>
+    </controller>
+    <controller type='sata' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/>
+    </controller>
+    <controller type='pci' index='0' model='pcie-root'/>
+    <controller type='pci' index='1' model='pcie-root-port'>
+      <model name='pcie-root-port'/>
+      <target chassis='1' port='0x10'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0' multifunction='on'/>
+    </controller>
+    <controller type='pci' index='2' model='pcie-root-port'>
+      <model name='pcie-root-port'/>
+      <target chassis='2' port='0x11'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x1'/>
+    </controller>
+    <controller type='pci' index='3' model='pcie-root-port'>
+      <model name='pcie-root-port'/>
+      <target chassis='3' port='0x12'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x2'/>
+    </controller>
+    <controller type='pci' index='4' model='pcie-root-port'>
+      <model name='pcie-root-port'/>
+      <target chassis='4' port='0x13'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x3'/>
+    </controller>
+    <controller type='pci' index='5' model='pcie-root-port'>
+      <model name='pcie-root-port'/>
+      <target chassis='5' port='0x14'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x4'/>
+    </controller>
+    <controller type='pci' index='6' model='pcie-root-port'>
+      <model name='pcie-root-port'/>
+      <target chassis='6' port='0x15'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x5'/>
+    </controller>
+    <controller type='pci' index='7' model='pcie-root-port'>
+      <model name='pcie-root-port'/>
+      <target chassis='7' port='0x16'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x6'/>
+    </controller>
+    <controller type='pci' index='8' model='pcie-root-port'>
+      <model name='pcie-root-port'/>
+      <target chassis='8' port='0x17'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x7'/>
+    </controller>
+    <controller type='pci' index='9' model='pcie-root-port'>
+      <model name='pcie-root-port'/>
+      <target chassis='9' port='0x18'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0' multifunction='on'/>
+    </controller>
+    <controller type='pci' index='10' model='pcie-root-port'>
+      <model name='pcie-root-port'/>
+      <target chassis='10' port='0x19'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x1'/>
+    </controller>
+    <controller type='virtio-serial' index='0'>
+      <address type='pci' domain='0x0000' bus='0x04' slot='0x00' function='0x0'/>
+    </controller>
+    <controller type='scsi' index='0' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x08' slot='0x00' function='0x0'/>
+    </controller>
+    <serial type='pty'>
+      <target type='isa-serial' port='0'>
+        <model name='isa-serial'/>
+      </target>
+    </serial>
+    <console type='pty'>
+      <target type='serial' port='0'/>
+    </console>
+    <input type='mouse' bus='ps2'/>
+    <input type='keyboard' bus='ps2'/>
+    <memballoon model='virtio'>
+      <address type='pci' domain='0x0000' bus='0x06' slot='0x00' function='0x0'/>
+    </memballoon>
+    <rng model='virtio'>
+      <backend model='random'>/dev/urandom</backend>
+      <address type='pci' domain='0x0000' bus='0x07' slot='0x00' function='0x0'/>
+    </rng>
+  </devices>
+</domain>
+

kvm/create.sh

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+#!/bin/sh
+
+# Check if hypervisor is installed
+if [ -z "$(which virsh)" ]
+then
+    echo "libvirt is not installed."
+    exit 1
+# Check if running as root or privileged user
+elif [ -z "$(groups | tr ' ' '\n' | grep libvirt)" ] && [ "$EUID" -ne 0 ]
+then
+    echo "Please run as root or user under 'libvirt' group."
+    exit 2
+fi
+
+# Variables
+base_dir=$(dirname $0)
+template_name=$1
+vm_name=$2
+
+# Create VM from template
+virsh define $base_dir/config/${template_name}.xml 1> /dev/null
+
+# Label VM
+virsh domrename ${template_name}-temp ${vm_name} 1> /dev/null
+