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metal/tools/vm

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#!/usr/bin/env bash
set -euo pipefail
ROOT=$(git rev-parse --show-toplevel)
VM_NAME="talos-vm"
VCPUS="6"
RAM_MB="16384"
DISK_GB="100"
NETWORK=talos
CONNECTION="qemu:///system"
function define_network() {
config_file=$(mktemp)
cat > ${config_file} << EOF
<network>
<name>${NETWORK}</name>
<bridge name="talos0" stp="on" delay="0"/>
<forward mode='nat'>
<nat/>
</forward>
<ip address="192.168.1.1" netmask="255.255.255.0">
<dhcp>
<range start="192.168.1.2" end="192.168.1.254"/>
<bootp file='http://192.168.1.1:8000/ipxe.pxe'/>
</dhcp>
</ip>
</network>
EOF
function cleanup() {
rm ${config_file}
}
trap cleanup EXIT
if [[ $(virsh --connect="${CONNECTION}" net-list --all | grep -c "${NETWORK}") == "0" ]]; then
virsh --connect="${CONNECTION}" net-define "${config_file}"
virsh --connect="${CONNECTION}" net-start "${NETWORK}"
virsh --connect="${CONNECTION}" net-autostart "${NETWORK}"
fi
trap - EXIT
cleanup
}
function create() {
define_network
if [[ $(virsh --connect="${CONNECTION}" list --all | grep -c "${VM_NAME}") == "0" ]]; then
virt-install --connect="${CONNECTION}" --name="${VM_NAME}" --vcpus="${VCPUS}" --memory="${RAM_MB}" \
--os-variant="linux2022" \
--disk="size=${DISK_GB}" \
--pxe \
--sysinfo system.serial=${VM_NAME} \
--network network="${NETWORK}"
else
echo -n "VM already exists, start it with:
${0} start
"
exit -1
fi
}
function start() {
if [[ $(virsh --connect="${CONNECTION}" list --all | grep -c "${VM_NAME}") > "0" ]]; then
virsh --connect="${CONNECTION}" start ${VM_NAME}
virt-viewer --connect="${CONNECTION}" ${VM_NAME}
else
echo -n "VM doest not exists yet, create it with:
${0} create
"
exit -1
fi
}
function connect() {
if [[ $(virsh --connect="${CONNECTION}" list | grep -c "${VM_NAME}") > "0" ]]; then
virt-viewer --connect="${CONNECTION}" ${VM_NAME}
else
echo "VM is not running"
exit -1
fi
}
function stop() {
if [[ $(virsh --connect="${CONNECTION}" list | grep -c "${VM_NAME}") > "0" ]]; then
virsh --connect="${CONNECTION}" shutdown ${VM_NAME}
WAIT=240
for i in $(seq 0 1 ${WAIT}); do
echo -en "\rWaiting for VM to shutdown... (${i}/${WAIT})"
if [[ $(virsh --connect="${CONNECTION}" list | grep -c "${VM_NAME}") == "0" ]]; then
echo -e "\nVM successfully shutdown"
exit
fi
sleep 1
done
echo -e "\nDestroying VM"
virsh --connect="${CONNECTION}" destroy ${VM_NAME}
else
echo "VM is not running"
exit -1
fi
}
function delete() {
if [[ $(virsh --connect="${CONNECTION}" list --all | grep -c "${VM_NAME}") > "0" ]]; then
if [[ $(virsh --connect="${CONNECTION}" list | grep -c "${VM_NAME}") > "0" ]]; then
virsh --connect="${CONNECTION}" destroy "${VM_NAME}"
fi
virsh --connect="${CONNECTION}" undefine "${VM_NAME}" --remove-all-storage
fi
if [[ $(virsh --connect="${CONNECTION}" net-list --all | grep -c "${NETWORK}") > "0" ]]; then
if [[ $(virsh --connect="${CONNECTION}" list | grep -c "${VM_NAME}") > "0" ]]; then
virsh --connect="${CONNECTION}" net-destroy "${NETWORK}"
fi
virsh --connect="${CONNECTION}" net-undefine "${NETWORK}"
fi
}
function help() {
echo -n "Available commands:
start
stop
remove
connect
"
}
COMMAND=${1:-}
case ${COMMAND} in
create)
create Create the vm and perform first install
;;
start)
start Start the vm
;;
stop)
stop Stop the vm
;;
delete)
delete Delete the vm
;;
connect)
connect Connect to an already running vm
;;
*)
help
;;
esac