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Implement VM configuration and deploy the images.

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This commit is contained in:
Andreas B. Mundt 2023-01-31 21:18:24 +01:00
parent 396a91fb40
commit 18928f2818
14 changed files with 315 additions and 9 deletions
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37
roles/lmn_vm/files/create-clone.sh Executable file
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#!/usr/bin/bash
# create VM clone
set -eu
# if less than one arguments supplied, display usage
if [ "$#" -ne 1 ]
then
echo "This script takes as input the name of the VM to clone"
echo "Usage: $0 vm_name"
exit 1
fi
# change to image-directory
cd /var/lib/libvirt/images
VM_NAME=$1
if [ ! -f "xml/${VM_NAME}.xml" -a -f "${VM_NAME}.gcow2" ]; then
echo "xml or qcow2 File does not exists."
exit 1
fi
qemu-img create -f qcow2 -F qcow2 -b "${VM_NAME}.qcow2" "${VM_NAME}-clone.qcow2"
cp "xml/${VM_NAME}.xml" "xml/${VM_NAME}-clone.xml"
# and actually rename the vm: (this also updates the storage path)
sed -i "s/${VM_NAME}/${VM_NAME}-clone/" "xml/${VM_NAME}-clone.xml"
# set Username for mounting data from correct user
sed -i "s/USER/${SUDO_USER}/" "xml/${VM_NAME}-clone.xml"
# delete the old vm
virsh --connect=qemu:///system undefine "${VM_NAME}-clone" || echo "${VM_NAME}-clone did not exist"
# finally, create the new vm
virsh --connect=qemu:///system define "xml/${VM_NAME}-clone.xml"

34
roles/lmn_vm/files/create-vm.sh Executable file
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#!/usr/bin/bash
# create 1st level-Clones
set -eu
# if less than two arguments supplied, display usage
if [ $# -ne 2 ]
then
echo "This script takes as input the name of the VM to clone"
echo "Usage: $0 vm_name_orig vm_name_clone"
exit 1
fi
VM_NAME=$1
VM_CLONE=$2
if [ ! -f "xml/$VM_NAME.xml" -a -f "$VM_NAME.gcow2" ]; then
echo "xml or qcow2 File does not exists."
exit 1
fi
qemu-img create -f qcow2 -F qcow2 -b $VM_NAME.qcow2 $VM_NAME-$VM_CLONE.qcow2
chmod a-w $VM_NAME-$VM_CLONE.qcow2
# virsh --connect=qemu:///system dumpxml $VM_NAME > xml/$VM_NAME_$VM_CLONE.xml
cp xml/$VM_NAME.xml xml/$VM_NAME-$VM_CLONE.xml
# hardware addresses need to be removed, libvirt will assign
# new addresses automatically
sed -i /uuid/d xml/$VM_NAME-$VM_CLONE.xml
sed -i '/mac address/d' xml/$VM_NAME-$VM_CLONE.xml
# and actually rename the vm: (this also updates the storage path)
sed -i s/$VM_NAME/$VM_NAME-$VM_CLONE/ xml/$VM_NAME-$VM_CLONE.xml

5
roles/lmn_vm/files/images.list Normal file
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win10.qcow2
win10-SolidWorks.qcow2
win10-Elektro.qcow2
deb11.qcow2
deb11-virtualbox.qcow2

3
roles/lmn_vm/files/lmn-create-clone-sudo Normal file
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%examusers ALL=(root) NOPASSWD: /usr/local/bin/create-clone.sh
%role-student ALL=(root) NOPASSWD: /usr/local/bin/create-clone.sh
%role-teacher ALL=(root) NOPASSWD: /usr/local/bin/create-clone.sh

3
roles/lmn_vm/files/lmn-mounthome-sudo Normal file
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%examusers ALL=(root) NOPASSWD: /usr/local/bin/mounthome.sh
%role-student ALL=(root) NOPASSWD: /usr/local/bin/mounthome.sh
%role-teacher ALL=(root) NOPASSWD: /usr/local/bin/mounthome.sh

3
roles/lmn_vm/files/lmn-proxy.sh Executable file
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export http_proxy='http://firewall:3128'
export https_proxy=$http_proxy
export ftp_proxy=$http_proxy

15
roles/lmn_vm/files/mounthome.sh Executable file
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#!/usr/bin/bash
set -eu
share="$(getent passwd "$SUDO_UID" | cut -d : -f 6 | sed 's/.*default-school//')"
if [ "$#" -gt 0 ] && [ "$1" = '-u' ]; then
umount "/media/${SUDO_USER}/home" && rmdir "/media/${SUDO_USER}/home"
else
chgrp 1010 "/media/${SUDO_USER}"
chmod 0770 "/media/${SUDO_USER}"
mkdir -p "/media/${SUDO_USER}/home"
mount -t cifs -o "sec=krb5i,cruid=${SUDO_UID},username=${SUDO_USER},uid=${SUDO_UID},\
gid=1010,file_mode=0770,dir_mode=0770,forceuid,forcegid,user=${SUDO_USER}" \
"//server/default-school/${share}" "/media/${SUDO_USER}/home"
fi

2
roles/lmn_vm/files/pulseaudio-override.conf Normal file
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[Service]
Environment=HOME=/tmp/pulse.%u

44
roles/lmn_vm/files/rebase-vm.sh Executable file
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#!/usr/bin/bash
# Rebase one level down
set -eu
# if less than one arguments supplied, display usage
if [ $# -ne 1 ]
then
echo "This script takes as input the name of the VM to rebase one level down"
echo "Usage: $0 vm_name"
exit 1
fi
VM_NAME=$1
if [ ! -f $VM_NAME.qcow2 ]
then
echo "File not found $VM_NAME.qcow2"
exit 1
fi
shopt -s lastpipe
qemu-img info --backing-chain $VM_NAME.qcow2 | grep image | wc -l | read NUMBASES
qemu-img info --backing-chain $VM_NAME.qcow2 | grep image | head -n 3 | tail -n 1 | cut -d' ' -f2 | read NEWBASE
qemu-img info --backing-chain $VM_NAME.qcow2 | grep image | head -n 2 | tail -n 1 | cut -d' ' -f2 | read CURRENTBASE
if [ ! $NUMBASES -ge 3 ]
then
echo "Image must have at least 2 backing-files"
exit 1
fi
if [ ! -f $NEWBASE -a -f $CURRENTBASE ]
then
echo "Backingfiles not found $CURRENTBASE, $NEWBASE"
exit 1
fi
qemu-img rebase -f qcow2 -b $NEWBASE -F qcow2 $VM_NAME.qcow2
rm $CURRENTBASE
mv $VM_NAME.qcow2 $CURRENTBASE
chmod a-w $CURRENTBASE
qemu-img create -f qcow2 -F qcow2 -b $CURRENTBASE $VM_NAME.qcow2

67
roles/lmn_vm/files/run-vm.sh Executable file
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#!/usr/bin/bash
# create and run clone
set -eu
NEWCLONE=0
show_help() {
cat << EOF
Usage: $(basename "$0") [-n] vmname"
Create a new clone, start the vm (if not yet running) and run virt-viewer.
Squid-Proxy will be started too.
User Home will be mounted on /media/USERNAME/home
-n new clone will be created, even if exists
EOF
}
NEWCLONE=0
while getopts ':n' OPTION; do
case "$OPTION" in
n)
NEWCLONE=1
;;
?)
show_help
exit 1
;;
esac
done
shift "$((OPTIND -1))"
# if less than one arguments supplied, display usage
if [[ $# -ne 1 ]] ; then
show_help
exit 1
fi
VM_NAME=$1
if [[ ! -f "/var/lib/libvirt/images/${VM_NAME}.qcow2" ]]; then
echo "no base VM disk '${VM_NAME}.qcow2' found"
exit 1
fi
# check, if we have to start squid
if [[ ! -f "/tmp/squid.pid" ]]; then
echo "starting squid."
/usr/sbin/squid -f /etc/squid/squid-usermode.conf
fi
# check, if we have to mount home
if [[ ! -d "/media/${USER}/home" ]]; then
echo "mounting home."
sudo mounthome.sh
fi
if ! virsh --connect=qemu:///system list | grep "${VM_NAME}"; then
echo "VM not yet running. Try to clone and start."
if [[ "${NEWCLONE}" = 1 ]] || [[ ! -f "/var/lib/libvirt/images/${VM_NAME}-clone.qcow2" ]]; then
sudo create-clone.sh "${VM_NAME}"
fi
virsh --connect=qemu:///system start "${VM_NAME}-clone"
fi
echo "starting viewer"
virt-viewer --connect=qemu:///system --full-screen "${VM_NAME}-clone"