xci: scripts: vm: Use LVM backend if available

The CI nodes come with a big secondary mechanical disk which can be
attached directly to the clean VM. As such, we split the disk into one
logical volume per distribution and flush the qcow2 image to it before
attaching it to the VM. If the XCI volume group is not available, then
we revert back to using a file-based storage backend. Finally, we hide
stdout/stderr from the package installation process to minimize the
script output.

Change-Id: I11ea82899c411f8a4168e5f23cbbd8187cc891df
Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/xci/scripts/vm/start-new-vm.sh b/xci/scripts/vm/start-new-vm.sh
index e5a13b6..70dc4ef 100755 (executable)
--- a/xci/scripts/vm/start-new-vm.sh
+++ b/xci/scripts/vm/start-new-vm.sh
@@ -130,7 +130,7 @@ while true; do
        pgrep -fa "${pkg_mgr_cmd%*install*}" 2>&1 && sleep 60 || break
 done
 
-eval ${pkg_mgr_cmd}
+eval ${pkg_mgr_cmd} &> /dev/null
 
 echo "Ensuring libvirt and docker services are running..."
 sudo systemctl -q start libvirtd
@@ -173,9 +173,6 @@ declare -r OS_IMAGE_FILE=${OS}.qcow2
 
 [[ ! -e ${OS_IMAGE_FILE} ]] && echo "${OS_IMAGE_FILE} not found! This should never happen!" && exit 1
 
-echo "Resizing disk image '${OS}' to ${DISK}G..."
-qemu-img resize ${OS_IMAGE_FILE} ${DISK}G
-
 echo "Creating new network '${NETWORK}' if it does not exist already..."
 if ! sudo virsh net-list --name --all | grep -q ${NETWORK}; then
        cat > /tmp/${NETWORK}.xml <<EOF
@@ -200,9 +197,28 @@ fi
 sudo virsh net-list --autostart | grep -q ${NETWORK} || sudo virsh net-autostart ${NETWORK}
 sudo virsh net-list --inactive | grep -q ${NETWORK} && sudo virsh net-start ${NETWORK}
 
+echo "Determining backend storage device..."
+if sudo vgscan | grep -q xci-vm-vg; then
+       echo "Using LVM backend..."
+       lv_dev="/dev/xci-vm-vg/xci-vm-${OS}"
+       echo "Creating new xci-vm-${OS} LV if necessary..."
+       sudo lvscan | grep -q xci-vm-${OS} || {
+               sudo lvcreate -W y -l 33%FREE -n xci-vm-${OS} xci-vm-vg
+               sudo mkfs.ext4 -m 0 ${lv_dev}
+       }
+       echo "Flusing the ${OS_IMAGE_FILE} image to ${lv_dev}..."
+       sudo qemu-img convert -O raw ${OS_IMAGE_FILE} ${lv_dev}
+       disk_config="${lv_dev},cache=directsync,bus=virtio"
+else
+       echo "Using file backend..."
+       echo "Resizing disk image '${OS}' to ${DISK}G..."
+       qemu-img resize ${OS_IMAGE_FILE} ${DISK}G
+       disk_config="${OS_IMAGE_FILE},cache=none,bus=virtio"
+fi
+
 echo "Installing virtual machine '${VM_NAME}'..."
 sudo virt-install -n ${VM_NAME} --memory ${MEMORY} --vcpus ${NCPUS} --cpu ${CPU} \
-       --import --disk=${OS_IMAGE_FILE},cache=none,bus=virtio --network network=${NETWORK},model=virtio \
+       --import --disk=${disk_config} --network network=${NETWORK},model=virtio \
        --graphics none --hvm --noautoconsole
 
 trap destroy_vm_on_failures EXIT