174 lines
4.9 KiB
Bash
Executable File
174 lines
4.9 KiB
Bash
Executable File
#!/bin/bash
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# Heavily Modified Script By: Brielle Bruns
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# Date: 04/11/2018
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# URL: https://git.sosdg.org/brielle/virt-install-cloud
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# Version: 1.0
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#
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# Originally based on:
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# virt-install-cloud.sh : script to start an OpenStack cloud image on kvm
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# version : 1.1.1
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#
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# Author : Claude Durocher
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# License : GPLv3
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#
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# ref. http://mojodna.net/2014/05/14/kvm-libvirt-and-ubuntu-14-04.html
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#
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# requires the following packages on Ubuntu host:
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# wget qemu-kvm libvirt-bin virtinst bridge-utils genisoimage|xorriso
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# requires the following packages on CentOS host:
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# wget qemu-kvm libvirt virt-install bridge-utils genisoimage|xorriso
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#
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# check if the script is run as root user
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if [[ $USER != "root" ]]; then
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echo "This script must be run as root!" && exit 1
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fi
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usage() {
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echo "${0} Help"
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echo -e "\t-h show this help"
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echo -e "\t-n hostname *"
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echo -e "\t-d domainame *"
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echo -e "\t-s disk size (num + count size - M=Megabytes G=Gigabytes) *"
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echo -e "\t-r ram size (in kilobytes) *"
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echo -e "\t-c number of vcpus"
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echo -e "\t-b bridge to attach to *"
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echo -e "\t-i distribution to use (see script for supported options) - default is stretch"
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echo -e "\t-o OS type and variant (default: generic:generic - also set by distro option when available)"
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}
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while getopts "c:r:s:n:d:i:o:b:h" opt; do
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case $opt in
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c) cpucount=$OPTARG;;
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r) ram=$OPTARG;;
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s) storage=$OPTARG;;
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n) hostname=$OPTARG;;
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d) domain=$OPTARG;;
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i) distro=$OPTARG;;
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o) ostype=$OPTARG;;
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b) bridge=$OPTARG;;
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h) help="yes";;
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esac
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done
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if [[ -z $ram || -z $storage || -z $hostname || -z $domain || -z $bridge || $help == "yes" ]]; then
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echo "Error: Incorrect command usage, must provide all * flags."
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usage
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exit 1
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fi
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if [[ -z $distro ]]; then
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distro="stretch"
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fi
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if [[ -z $cpucount ]]; then
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cpucount="2"
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fi
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if [[ ! -z $ostype ]]; then
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OIFS=${IFS}
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IFS=:
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read -ra virt_os <<< "$ostype"
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virt_ostype=${virt_os[0]}
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virt_osvariant=${virt_os[1]}
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IFS=${OIFS}
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else
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virt_ostype="generic"
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virt_osvariant="generic"
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fi
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arch="amd64"
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source distros
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# kvm defaults pool paths
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DEF_POOL=images
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DEF_POOL_PATH=/data/images
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# vm prefs : specify vm preferences for your guest
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BACKUP_ISO_FILES=no # yes or no
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net_interface="bridge=${bridge},model=virtio"
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# guest image format: qcow2 or raw
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FORMAT=raw
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# convert image format : yes or no
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CONVERT=yes
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# kvm pool
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POOL=images
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POOL_PATH=/data/images
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sed -e "s/%GUEST_NAME%/${hostname}/" meta-data > output/meta-data
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sed -e "s/%FQDN%/${hostname}.${domain}/" user-data > output/user-data
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if [[ ! -f images/${IMG_NAME} ]]; then
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echo "Downloading image ${IMG_NAME}..."
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wget ${IMG_URL}/${IMG_NAME} -O images/${IMG_NAME}
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chmod 644 ${IMG_NAME}
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else
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echo "Using existing image ${IMG_NAME}..."
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fi
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# check if pool exists, otherwise create it
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if [[ "$(virsh pool-list|grep ${POOL} -c)" -ne "1" ]]; then
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echo "Creating pool ${POOL}..."
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virsh pool-define-as --name ${POOL} --type dir --target ${POOL_PATH}
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virsh pool-autostart ${POOL}
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virsh pool-build ${POOL}
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virsh pool-start ${POOL}
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fi
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# write the two cloud-init files into an ISO
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echo "Preparing ISO file required by cloud-init..."
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#genisoimage -input-charset utf8 -output configuration.iso -volid cidata -joliet -rock user-data meta-data
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xorriso -in_charset utf8 -outdev configuration.iso -volid cidata -joliet on -rockridge on -map output/user-data user-data -map output/meta-data meta-data
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# keep a backup of the files for future reference
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if [[ "${BACKUP_ISO_FILE}" == "yes" ]]; then
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cp user-data ${hostname}.user-data
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cp meta-data ${hostname}.meta-data
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chmod 640 ${hostname}.user-data ${hostname}.meta-data
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fi
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# copy ISO into libvirt's directory
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cp configuration.iso ${POOL_PATH}/${hostname}.${domain}.configuration.iso
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virsh pool-refresh ${POOL}
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# copy image to libvirt's pool
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if [[ ! -f ${POOL_PATH}/${IMG_NAME} ]]; then
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cp images/${IMG_NAME} ${POOL_PATH}
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virsh pool-refresh ${POOL}
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fi
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# clone cloud image
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virsh vol-clone --pool ${POOL} ${IMG_NAME} ${hostname}.${domain}.root.img
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virsh vol-resize --pool ${POOL} ${hostname}.${domain}.root.img ${storage}
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# convert image format
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if [[ "${CONVERT}" == "yes" ]]; then
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echo "Converting image to format ${FORMAT}..."
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qemu-img convert -O ${FORMAT} ${POOL_PATH}/${hostname}.${domain}.root.img ${POOL_PATH}/${hostname}.${domain}.root.img.${FORMAT}
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rm ${POOL_PATH}/${hostname}.${domain}.root.img
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mv ${POOL_PATH}/${hostname}.${domain}.root.img.${FORMAT} ${POOL_PATH}/${hostname}.${domain}.root.img
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virsh pool-refresh ${POOL}
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fi
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echo "Creating guest ${hostname}.${domain}..."
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virt-install \
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--name ${hostname}.${domain} \
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--cpu host \
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--ram ${ram} \
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--vcpus=${cpucount} \
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--noautoconsole \
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--memballoon virtio \
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--network ${net_interface} \
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--boot hd \
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--disk vol=${POOL}/${hostname}.${domain}.root.img,format=${FORMAT},bus=virtio,cache=none \
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--disk vol=${POOL}/${hostname}.${domain}.configuration.iso,bus=virtio \
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--console pty,target_type=serial \
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--os-type=${virt_ostype} --os-variant=${virt_osvariant}
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# cleanup
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rm configuration.iso output/meta-data output/user-data
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