232 lines
6.9 KiB
Bash
Executable File
232 lines
6.9 KiB
Bash
Executable File
#!/bin/bash
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# Variables
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VM_HOSTNAME=
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VM_BASE_DIR=${VM_BASE_DIR:-"${HOME}/vms"}
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VM_DISK_SIZE=20
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VM_DISK_FORMAT=qcow2
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VM_MEM_SIZE=2048
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VM_VCPUS=2
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VM_BASE_IMAGE=
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VM_OS_VARIANT=
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VM_USERNAME="user"
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VM_BRIDGE_INT=
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LIBVIRT_NET_OPTION="network=default,model=e1000"
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# Functions
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usage()
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{
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cat << EOF
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usage: $0 options
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Quickly create guest VMs using cloud image files and cloud-init.
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OPTIONS:
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-h Show this message
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-n Host name (required)
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-b bridge interface name (bridge network is used)
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-r RAM in MB (defaults to ${VM_MEM_SIZE})
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-c Number of VCPUs (defaults to ${VM_VCPUS})
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-s Amount of storage to allocate in GB (defaults to ${VM_DISK_SIZE})
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-v Verbose
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EOF
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}
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download_base_image()
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{
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if ! test -f "$HOME/vms/base/$VM_OS_VARIANT.qcow2"; then
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if [[ "$VM_OS_VARIANT" == "freebsd14.0" ]]; then
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VM_DISK_FORMAT=".qcow2.xz"
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wget -v -O "$HOME/vms/base/$VM_OS_VARIANT.${VM_DISK_FORMAT}" ${VM_BASE_IMAGE}
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cd $HOME/vms/base/
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xz -d $VM_OS_VARIANT.${VM_DISK_FORMAT}
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cd -
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else
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wget -v -O "$HOME/vms/base/$VM_OS_VARIANT.${VM_DISK_FORMAT}" ${VM_BASE_IMAGE}
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fi
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fi
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}
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gen_linux_user_data()
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{
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VM_USER_PASS=$(tr -dc A-Za-z0-9 </dev/urandom | head -c 8; echo)
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VM_USER_PASS_HASH=$(mkpasswd --method=SHA-512 --rounds=4096 ${VM_USER_PASS})
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cat <<EOF > "$VM_BASE_DIR/init/${VM_HOSTNAME}-user-data"
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#cloud-config
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hostname: ${VM_HOSTNAME}
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# manage_etc_hosts: false
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ssh_pwauth: true
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disable_root: true
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users:
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- name: ${VM_USERNAME}
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hashed_passwd: ${VM_USER_PASS_HASH}
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sudo: ALL=(ALL) NOPASSWD:ALL
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shell: /bin/bash
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lock-passwd: false
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ssh_authorized_keys:
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- ${SSH_PUB_KEY}
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EOF
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}
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gen_freebsd_user_data()
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{
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#VM_ROOT_PASS=$(tr -dc A-Za-z0-9 </dev/urandom | head -c 16; echo)
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VM_ROOT_PASS="changeme"
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echo "Generated root passwd: ${VM_ROOT_PASS}"
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VM_ROOT_PASS_HASH=$(mkpasswd --method=SHA-512 --rounds=4096 ${VM_ROOT_PASS})
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# Write FreeBSD 13.2 user-data
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VM_USER_PASS="sasasa123"
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VM_USER_PASS_HASH=$(mkpasswd --method=SHA-512 --rounds=4096 ${VM_USER_PASS})
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cat <<EOF > "$VM_BASE_DIR/init/${VM_HOSTNAME}-user-data"
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#cloud-config
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users:
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- name: root
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lock_passwd: false
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hashed_passwd: ${VM_ROOT_PASS}
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- name: ${VM_USERNAME}
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ssh_authorized_keys:
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- ssh-rsa ${SSH_PUB_KEY}
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groups: wheel
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ssh_pwauth: true
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hashed_passwd: ${VM_USER_PASS_HASH}
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write_files:
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- path: /usr/local/etc/sudoers
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content: |
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%wheel ALL=(ALL) NOPASSWD: ALL
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append: true
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EOF
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}
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while getopts "h:n:net:b:r:c:s:v" option; do
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case "${option}"
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in
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h)
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usage
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exit 0
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;;
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n) VM_HOSTNAME=${OPTARG};;
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b) VM_BRIDGE_INT=${OPTARG};;
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r) VM_MEM_SIZE=${OPTARG};;
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c) VM_VCPUS=${OPTARG};;
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s) VM_DISK_SIZE=${OPTARG};;
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v) VERBOSE=1;;
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*)
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usage
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exit 1
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;;
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esac
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done
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if [[ -z $VM_HOSTNAME ]]; then
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echo "ERROR: Host name is required"
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usage
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exit 1
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fi
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if [[ -n $VERBOSE ]]; then
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echo "Building ${VM_HOSTNAME} in $VM_IMAGE_DIR"
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set -xv
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fi
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if [[ -n $VM_BRIDGE_INT ]]; then
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LIBVIRT_NET_OPTION="model=virtio,bridge=${VM_BRIDGE_INT}"
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fi
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mkdir -p "$VM_BASE_DIR"/{images,xml,init,base,ssh}
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## VM Base image
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if [ -n "$VM_BASE_IMAGE" ] && [ -f "$VM_BASE_IMAGE" ]; then
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download_base_image
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else
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while true; do
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read -r -p $'Select VM OS:\n 1.Debian12\n 2.Ubuntu 20.04\n 3.Ubuntu22.04\n 4.FreeBSD 14\n' -n1 answer
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case $answer in
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[1]* ) VM_OS_VARIANT='debian11'
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VM_BASE_IMAGE='https://cloud.debian.org/images/cloud/bookworm/latest/debian-12-generic-amd64.qcow2'
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break;;
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[2]* ) VM_OS_VARIANT='ubuntu20.04'
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VM_BASE_IMAGE='https://cloud-images.ubuntu.com/focal/current/focal-server-cloudimg-amd64.img'
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break;;
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[3]* ) VM_OS_VARIANT='ubuntu22.04'
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VM_BASE_IMAGE='https://cloud-images.ubuntu.com/jammy/current/jammy-server-cloudimg-amd64.img'
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break;;
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[4]* ) VM_OS_VARIANT='ubuntu24.04'
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VM_BASE_IMAGE='https://cloud-images.ubuntu.com/noble/current/noble-server-cloudimg-amd64.img'
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break;;
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[5]* ) VM_OS_VARIANT='freebsd14.0'
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VM_BASE_IMAGE='https://download.freebsd.org/releases/VM-IMAGES/14.0-RELEASE/amd64/Latest/FreeBSD-14.0-RELEASE-amd64.qcow2.xz'
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break;;
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* ) echo "Please answer 1,2,3,4,5.";;
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esac
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done
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download_base_image
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fi
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echo "Creating a qcow2 image file ${VM_BASE_DIR}/images/${VM_HOSTNAME}.img that uses the cloud image file $HOME/vms/base/$VM_OS_VARIANT.${VM_DISK_FORMAT} as its base"
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if ! test -f "${VM_BASE_DIR}/images/${VM_HOSTNAME}.img"; then
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qemu-img create -b "$HOME/vms/base/${VM_OS_VARIANT}.qcow2" -f qcow2 -F qcow2 "${VM_BASE_DIR}/images/${VM_HOSTNAME}.img" "${VM_DISK_SIZE}G"
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else
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echo "El fichero ${VM_BASE_DIR}/images/${VM_HOSTNAME}.img ya existe"
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exit 1
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fi
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# VM ssh keys gen
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if [ -f "${VM_BASE_IMAGE}/ssh/${VM_HOSTNAME}" ]; then
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echo "Ya existe una clave ssh para la maquina ${VM_HOSTNAME}"
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else
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ssh-keygen -t rsa -b 4096 -N '' -f "${VM_BASE_DIR}/ssh/${VM_HOSTNAME}"
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chmod 600 ${VM_BASE_DIR}/ssh/${VM_HOSTNAME}.pub
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ssh-keygen -y -f "${VM_BASE_DIR}/ssh/${VM_HOSTNAME}" > "${VM_BASE_DIR}/ssh/${VM_HOSTNAME}".pub.txt
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SSH_PUB_KEY=$(cat "${VM_BASE_DIR}/ssh/${VM_HOSTNAME}".pub.txt)
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rm "${VM_BASE_DIR}/ssh/${VM_HOSTNAME}".pub.txt
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fi
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#cloud-init VM meta-data
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cat > "$VM_BASE_DIR/init/${VM_HOSTNAME}-meta-data" << EOF
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instance-id: ${VM_HOSTNAME}
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local-hostname: ${VM_HOSTNAME}
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EOF
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#cloud-init VM user-data
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if [[ "$VM_OS_VARIANT" == "freebsd14.0" ]]; then
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gen_freebsd_user_data
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# genisoimage \
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# -output ${VM_BASE_DIR}/images/${VM_HOSTNAME}-cidata.iso \
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# -V cidata -r \
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# -J ${VM_BASE_DIR}/init/${VM_HOSTNAME}-user-data ${VM_BASE_DIR}/init/${VM_HOSTNAME}-meta-data
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# virt-install \
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# --name ${VM_HOSTNAME} \
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# --memory ${VM_MEM_SIZE} \
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# --vcpus="${VM_VCPUS}" \
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# --os-variant=${VM_OS_VARIANT} \
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# --disk ${VM_BASE_DIR}/images/${VM_HOSTNAME}.img,device=disk,bus=virtio \
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# --disk path=${VM_BASE_DIR}/images/${VM_HOSTNAME}-cidata.iso,device=cdrom \
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# --network ${LIBVIRT_NET_OPTION} \
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# --autostart \
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# --import --noautoconsole \
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# --cloud-init root-password-generate=on,user-data=${VM_BASE_DIR}/init/${VM_HOSTNAME}-user-data
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else
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gen_linux_user_data
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fi
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virt-install \
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--name ${VM_HOSTNAME} \
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--memory ${VM_MEM_SIZE} \
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--vcpus="${VM_VCPUS}" \
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--os-variant=${VM_OS_VARIANT} \
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--disk ${VM_BASE_DIR}/images/${VM_HOSTNAME}.img,device=disk,bus=virtio \
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--network ${LIBVIRT_NET_OPTION} \
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--autostart \
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--import --noautoconsole \
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--cloud-init root-password-generate=on,user-data=${VM_BASE_DIR}/init/${VM_HOSTNAME}-user-data
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# cloud-localds \
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# ${VM_BASE_DIR}/images/${VM_HOSTNAME}.iso \
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# ${VM_BASE_DIR}/init/${VM_HOSTNAME}-user-data
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virsh dumpxml "${VM_HOSTNAME}" > "${VM_BASE_DIR}/xml/${VM_HOSTNAME}.xml"
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if [ -n $VERBOSE ]; then
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set +xv
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fi
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# Show running VMs
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virsh list
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