Implement VM configuration and deploy the images.

lmn-desktop.yml

@@ -14,7 +14,7 @@
       when: "ansible_cmdline.adpw is not defined"
 
   vars:
-    domain: "pn.steinbeis.schule"
+    domain: "{{ ansible_domain }}"
     extra_pkgs:
       - vim
       - mc
@@ -22,7 +22,7 @@
       - console-setup
       - krb5-user
       - unattended-upgrades
-    extra_pkgs_bpo: [ linux-image-amd64 ]  # [ libreoffice ]
+    extra_pkgs_bpo: [ linux-image-amd64 ]
     ansible_python_interpreter: "/usr/bin/python3"
 
   roles:

roles/lmn_mount/tasks/main.yml

@@ -17,7 +17,7 @@
         server="{{ smb_server }}"
         path="{{ smb_share }}"
         mountpoint="/media/%(DOMAIN_USER)/share"
-        options="sec=krb5i,cruid=%(USERUID),user=%(USER),gid=1001,file_mode=0770,dir_mode=0770"
+        options="sec=krb5i,cruid=%(USERUID),user=%(USER),gid=1010,file_mode=0770,dir_mode=0770"
       ><not><or><user>root</user><user>ansible</user><user>Debian-gdm</user><user>sddm</user><user>virti</user></or></not></volume>
     insertafter: "<!-- Volume definitions -->"
 

roles/lmn_vm/files/create-clone.sh

@@ -0,0 +1,37 @@
+#!/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"

roles/lmn_vm/files/create-vm.sh

@@ -0,0 +1,34 @@
+#!/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

roles/lmn_vm/files/images.list

@@ -0,0 +1,5 @@
+win10.qcow2
+win10-SolidWorks.qcow2
+win10-Elektro.qcow2
+deb11.qcow2
+deb11-virtualbox.qcow2

roles/lmn_vm/files/lmn-create-clone-sudo

@@ -0,0 +1,3 @@
+%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

roles/lmn_vm/files/lmn-mounthome-sudo

@@ -0,0 +1,3 @@
+%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

roles/lmn_vm/files/lmn-proxy.sh

@@ -0,0 +1,3 @@
+export http_proxy='http://firewall:3128'
+export https_proxy=$http_proxy
+export ftp_proxy=$http_proxy

roles/lmn_vm/files/mounthome.sh

@@ -0,0 +1,15 @@
+#!/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

roles/lmn_vm/files/pulseaudio-override.conf

@@ -0,0 +1,2 @@
+[Service]
+Environment=HOME=/tmp/pulse.%u

roles/lmn_vm/files/rebase-vm.sh

@@ -0,0 +1,44 @@
+#!/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

roles/lmn_vm/files/run-vm.sh

@@ -0,0 +1,67 @@
+#!/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"

roles/lmn_vm/tasks/main.yml

@@ -18,6 +18,19 @@
     autoremove: true
   when: ansible_distribution_release == 'bookworm'
 
+- name: allow all users to use VMs
+  lineinfile:
+    dest: /etc/libvirt/libvirtd.conf
+    line: 'auth_unix_rw = "none"'
+    insertafter: '#auth_unix_rw = "polkit"'
+  notify: reload libvirtd
+
+- name: autostart default network for VMs
+  file:
+    src: /etc/libvirt/qemu/networks/default.xml
+    dest: /etc/libvirt/qemu/networks/autostart/default.xml
+    state: link
+
 - name: install squid
   apt:
     name:
@@ -25,9 +38,78 @@
     state: latest
     autoremove: true
 
-- name: allow all users to use VMs
-  lineinfile:
-    dest: /etc/libvirt/libvirtd.conf
-    line: 'auth_unix_rw = "none"'
-    insertafter: '#auth_unix_rw = "polkit"'
-  notify: reload libvirtd
+- name: disable squid
+  systemd:
+    name: squid
+    enabled: false
+    state: stopped
+
+- name: deploy squid user mode configuration
+  template:
+    src: squid-usermode.conf.j2
+    dest: /etc/squid/squid-usermode.conf
+    mode: '0644'
+
+- name: deploy sudo configuration
+  copy:
+    src: lmn-mounthome-sudo
+    dest: /etc/sudoers.d/90-lmn-mounthome
+    owner: root
+    group: root
+    mode: '0700'
+
+- name: deploy sudo configuration
+  copy:
+    src: lmn-create-clone-sudo
+    dest: /etc/sudoers.d/90-lmn-create-clone
+    owner: root
+    group: root
+    mode: '0700'
+
+- name: deploy mount home script
+  copy:
+    src: "{{ item }}"
+    dest: /usr/local/bin/
+    owner: root
+    group: root
+    mode: '0755'
+  loop:
+    - mounthome.sh
+    - create-vm.sh
+    - rebase-vm.sh
+    - create-clone.sh
+    - run-vm.sh
+
+- name: deploy http proxy config
+  copy:
+    src: lmn-proxy.sh
+    dest: /etc/profile.d/
+    mode: '0644'
+
+- name: deploy pulseaudio fix
+  file:
+    path: /etc/systemd/user/pulseaudio.service.d/
+    state: directory
+
+- name: deploy pulseaudio fix
+  copy:
+    src: pulseaudio-override.conf
+    dest: /etc/systemd/user/pulseaudio.service.d/override.conf
+
+#### VMs
+- name: deploy initial image list
+  copy:
+    src: images.list
+    dest: /var/lib/libvirt/images/images.list
+    force: false
+
+- name: rsync VM image definitions
+  command: rsync -a --itemize-changes rsync://server:/vmimages-download/xml /var/lib/libvirt/images/
+  register: result
+  changed_when: result.stdout | length > 0
+
+- name: rsync VM images
+  command: rsync -a -i --files-from=/var/lib/libvirt/images/images.list rsync://server:/vmimages-download/ /var/lib/libvirt/images/
+  register: result
+  changed_when: result.stdout | length > 0
+  when: (ansible_mounts | selectattr("mount", "equalto", "/") | list)[0].size_available > 80000000000

roles/lmn_vm/templates/squid-usermode.conf.j2

@@ -0,0 +1,11 @@
+acl local-servers dstdomain .{{ domain }}
+cache_peer firewall parent 3128 0 no-query default login=NEGOTIATE auth-no-keytab
+never_direct deny local-servers
+never_direct allow all
+#access_log stdio:/tmp/access.log squid
+access_log none
+cache_log /dev/null 
+logfile_rotate 0
+pid_filename /tmp/squid.pid
+http_port 192.168.122.1:3128 
+http_access allow all