15_createVM

1.xxx

#!/bin/bash

CPU_MODE=$(virsh capabilities | grep "<model>.*</model>" | awk -F[\<\>] '{print $3}' | head -1)
IMAGE_DIR=/var/lib/libvirt/images
XML_DIR=/etc/libvirt/qemu

function CreateVM() {
    local VM_SIZE=20
    local VM_NAME=$1
    local QCOW2_IMG=stream9.qcow2

    rm -rf ${IMAGE_DIR}/${VM_NAME}.img
    qemu-img create -f qcow2 -F qcow2 -b ${IMAGE_DIR}/${QCOW2_IMG} ${IMAGE_DIR}/${VM_NAME}.img ${VM_SIZE}G
    # /usr/libexec/qemu-kvm -machine help
    cat >$XML_DIR/${VM_NAME}.xml <<EOF
<domain type='kvm'>
  <name>${VM_NAME}</name>
  <memory unit='KiB'>2097152</memory>
  <currentMemory unit='KiB'>2097152</currentMemory>
  <vcpu placement='static'>2</vcpu>
  <os>
    <type arch='x86_64' machine='pc'>hvm</type>
    <boot dev='hd'/>
  </os>
  <features>
    <acpi/>
    <apic/>
  </features>
  <cpu mode='custom' match='exact' check='partial'>
    <model fallback='allow'>${CPU_MODE}</model>
    <feature policy='require' name='md-clear'/>
    <feature policy='require' name='spec-ctrl'/>
    <feature policy='require' name='ssbd'/>
  </cpu>
  <clock offset='utc'>
    <timer name='rtc' tickpolicy='catchup'/>
    <timer name='pit' tickpolicy='delay'/>
    <timer name='hpet' present='no'/>
  </clock>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <pm>
    <suspend-to-mem enabled='no'/>
    <suspend-to-disk enabled='no'/>
  </pm>
  <devices>
    <emulator>/usr/libexec/qemu-kvm</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2'/>
      <source file='/var/lib/libvirt/images/${VM_NAME}.img'/>
      <target dev='vda' bus='virtio'/>
    </disk>
    <interface type='bridge'>
       <source bridge='vbr1'/>
       <model type='virtio'/>
    </interface>
    <console type='pty'>
      <target type='serial' port='0'/>
    </console>
    <input type='mouse' bus='ps2'/>
    <input type='keyboard' bus='ps2'/>
    <graphics type='vnc' port='5800' autoport='yes' listen='0.0.0.0' keymap='en-us'>
       <listen type='address' address='0.0.0.0'/>
    </graphics>
  </devices>
</domain>
EOF
    virsh define $XML_DIR/${VM_NAME}.xml
    sleep 1
    virsh start ${VM_NAME}
}

function DelStoppedVM() {
    for vm in $(virsh list --all | awk '/shut off/{print $2}'); do
        virsh undefine $vm
        rm -rf $IMAGE_DIR/${vm}.img
        rm -rf $XML_DIR/${vm}.xml
    done
}

function DelAllVM() {
    for vm in $(virsh list --all | awk '{print $2}' | egrep -v "^Name|^$"); do
        virsh destroy $vm
        virsh undefine $vm
        rm -rf $IMAGE_DIR/${vm}.img
        rm -rf $XML_DIR/${vm}.xml
    done
}

function main() {
    local AIM=
    local VM_NUM=0
    local VM_NAME=
    local DEFAULT_VM=()

    if [[ "$@" == "" ]]; then
        while true; do
            printf "%s\n%s\n%s\n" "1.Create VM" "2.Release the stopped VM" "3.Release all VM"
            read -p "What do you want to do: " AIM
            [[ $AIM -ge 1 && $AIM -le 3 ]] && break
            echo "The number you entered must be within 1~3!"
        done

        if [ $AIM -eq 1 ]; then
            while true; do
                read -p "How many VMs do you want: " VM_NUM
                if [ $VM_NUM -gt 0 ]; then
                    break
                else
                    echo "The number you entered must be greater than 0!"
                fi
            done

            for i in $(seq $VM_NUM); do
                read -p "Name:" VM_NAME
                CreateVM $VM_NAME
            done

        elif [ $AIM -eq 2 ]; then
            DelStoppedVM

        elif [ $AIM -eq 3 ]; then
            DelAllVM
        fi

    else
        for VM_NAME in $@; do
            CreateVM $VM_NAME
        done
    fi

    # /var/lib/libvirt/dnsmasq
    virsh list --all
}

main $@