devstack: allow creating more than one volume for a VM

This is needed to easily test software RAID.

Change-Id: Ia1bc81db97c6d5d1f79c4e1cfea1ab29fd988c3f

4 files changed, 39 insertions, 17 deletions

diff --git a/devstack/lib/ironic b/devstack/lib/ironic
index 1292390c0..6aa0687c5 100644
--- a/devstack/lib/ironic
+++ b/devstack/lib/ironic
@@ -147,6 +147,7 @@ IRONIC_VM_EMULATOR=${IRONIC_VM_EMULATOR:-'/usr/bin/qemu-system-x86_64'}
 IRONIC_VM_ENGINE=${IRONIC_VM_ENGINE:-qemu}
 IRONIC_VM_NETWORK_BRIDGE=${IRONIC_VM_NETWORK_BRIDGE:-brbm}
 IRONIC_VM_INTERFACE_COUNT=${IRONIC_VM_INTERFACE_COUNT:-2}
+IRONIC_VM_VOLUME_COUNT=${IRONIC_VM_VOLUME_COUNT:-1}
 IRONIC_VM_MACS_CSV_FILE=${IRONIC_VM_MACS_CSV_FILE:-$IRONIC_DATA_DIR/ironic_macs.csv}
 IRONIC_CLEAN_NET_NAME=${IRONIC_CLEAN_NET_NAME:-${IRONIC_PROVISION_NETWORK_NAME:-${PRIVATE_NETWORK_NAME}}}
 IRONIC_RESCUE_NET_NAME=${IRONIC_RESCUE_NET_NAME:-${IRONIC_CLEAN_NET_NAME}}
@@ -1812,7 +1813,8 @@ function create_bridge_and_vms {
             $IRONIC_SCRIPTS_DIR/create-node.sh -n $vm_name \
                 -c $IRONIC_VM_SPECS_CPU -m $IRONIC_VM_SPECS_RAM -d $IRONIC_VM_SPECS_DISK \
                 -a $IRONIC_VM_SPECS_CPU_ARCH -b $IRONIC_VM_NETWORK_BRIDGE $vm_opts -p $vbmc_port -o $pdu_outlet \
-                -i $IRONIC_VM_INTERFACE_COUNT -f $IRONIC_VM_SPECS_DISK_FORMAT -M $PUBLIC_BRIDGE_MTU $log_arg >> $IRONIC_VM_MACS_CSV_FILE
+                -i $IRONIC_VM_INTERFACE_COUNT -f $IRONIC_VM_SPECS_DISK_FORMAT -M $PUBLIC_BRIDGE_MTU $log_arg \
+                -v $IRONIC_VM_VOLUME_COUNT >> $IRONIC_VM_MACS_CSV_FILE
 SUBSHELL
 
         if is_deployed_by_ipmi; then
diff --git a/devstack/tools/ironic/scripts/configure-vm.py b/devstack/tools/ironic/scripts/configure-vm.py
index b381269ba..a1b3a65df 100755
--- a/devstack/tools/ironic/scripts/configure-vm.py
+++ b/devstack/tools/ironic/scripts/configure-vm.py
@@ -15,6 +15,8 @@
 
 import argparse
 import os.path
+import string
+import sys
 
 import jinja2
 import libvirt
@@ -57,7 +59,7 @@ def main():
         description="Configure a kvm virtual machine for the seed image.")
     parser.add_argument('--name', default='seed',
                         help='the name to give the machine in libvirt.')
-    parser.add_argument('--image',
+    parser.add_argument('--image', action='append', default=[],
                         help='Use a custom image file (must be qcow2).')
     parser.add_argument('--engine', default='qemu',
                         help='The virtualization engine to use')
@@ -92,9 +94,14 @@ def main():
     env = jinja2.Environment(loader=jinja2.FileSystemLoader(templatedir))
     template = env.get_template('vm.xml')
 
+    images = list(zip(args.image, string.ascii_lowercase))
+    if not images or len(images) > 6:
+        # 6 is an artificial limitation because of the way we generate PCI IDs
+        sys.exit("Up to 6 images are required")
+
     params = {
         'name': args.name,
-        'imagefile': args.image,
+        'images': images,
         'engine': args.engine,
         'arch': args.arch,
         'memory': args.memory,
diff --git a/devstack/tools/ironic/scripts/create-node.sh b/devstack/tools/ironic/scripts/create-node.sh
index 67d261572..aa823aaae 100755
--- a/devstack/tools/ironic/scripts/create-node.sh
+++ b/devstack/tools/ironic/scripts/create-node.sh
@@ -12,7 +12,7 @@ export PS4='+ ${BASH_SOURCE:-}:${FUNCNAME[0]:-}:L${LINENO:-}:   '
 # Keep track of the DevStack directory
 TOP_DIR=$(cd $(dirname "$0")/.. && pwd)
 
-while getopts "n:c:i:m:M:d:a:b:e:E:p:o:f:l:L:N:A:D:" arg; do
+while getopts "n:c:i:m:M:d:a:b:e:E:p:o:f:l:L:N:A:D:v:" arg; do
     case $arg in
         n) NAME=$OPTARG;;
         c) CPU=$OPTARG;;
@@ -34,6 +34,7 @@ while getopts "n:c:i:m:M:d:a:b:e:E:p:o:f:l:L:N:A:D:" arg; do
         N) UEFI_NVRAM=$OPTARG;;
         A) MAC_ADDRESS=$OPTARG;;
         D) NIC_DRIVER=$OPTARG;;
+        v) VOLUME_COUNT=$OPTARG;;
     esac
 done
 
@@ -76,7 +77,6 @@ if [ -n "$LOGDIR" ] ; then
 else
     VM_LOGGING=""
 fi
-VOL_NAME="${NAME}.${DISK_FORMAT}"
 
 UEFI_OPTS=""
 if [ ! -z "$UEFI_LOADER" ]; then
@@ -111,20 +111,31 @@ if [ -n "$MAC_ADDRESS" ] ; then
     MAC_ADDRESS="--mac $MAC_ADDRESS"
 fi
 
+VOLUME_COUNT=${VOLUME_COUNT:-1}
+
 if ! virsh list --all | grep -q $NAME; then
-    virsh vol-list --pool $LIBVIRT_STORAGE_POOL | grep -q $VOL_NAME &&
-        virsh vol-delete $VOL_NAME --pool $LIBVIRT_STORAGE_POOL >&2
-    virsh vol-create-as $LIBVIRT_STORAGE_POOL ${VOL_NAME} ${DISK}G --format $DISK_FORMAT $PREALLOC >&2
-    volume_path=$(virsh vol-path --pool $LIBVIRT_STORAGE_POOL $VOL_NAME)
-    # Pre-touch the VM to set +C, as it can only be set on empty files.
-    sudo touch "$volume_path"
-    sudo chattr +C "$volume_path" || true
     vm_opts=""
+    for int in $(seq 1 $VOLUME_COUNT); do
+        if [[ "$int" == "1" ]]; then
+            # Compatibility with old naming
+            vol_name="$NAME.$DISK_FORMAT"
+        else
+            vol_name="$NAME-$int.$DISK_FORMAT"
+        fi
+        virsh vol-list --pool $LIBVIRT_STORAGE_POOL | grep -q $vol_name &&
+            virsh vol-delete $vol_name --pool $LIBVIRT_STORAGE_POOL >&2
+        virsh vol-create-as $LIBVIRT_STORAGE_POOL ${vol_name} ${DISK}G --format $DISK_FORMAT $PREALLOC >&2
+        volume_path=$(virsh vol-path --pool $LIBVIRT_STORAGE_POOL $vol_name)
+        # Pre-touch the VM to set +C, as it can only be set on empty files.
+        sudo touch "$volume_path"
+        sudo chattr +C "$volume_path" || true
+        vm_opts+="--image $volume_path "
+    done
     if [[ -n "$EMULATOR" ]]; then
         vm_opts+="--emulator $EMULATOR "
     fi
     $PYTHON $TOP_DIR/scripts/configure-vm.py \
-        --bootdev network --name $NAME --image "$volume_path" \
+        --bootdev network --name $NAME \
         --arch $ARCH --cpus $CPU --memory $MEM --libvirt-nic-driver $LIBVIRT_NIC_DRIVER \
         --disk-format $DISK_FORMAT $VM_LOGGING --engine $ENGINE $UEFI_OPTS $vm_opts \
         --interface-count $INTERFACE_COUNT $MAC_ADDRESS >&2
diff --git a/devstack/tools/ironic/templates/vm.xml b/devstack/tools/ironic/templates/vm.xml
index 8a009f476..2be30a549 100644
--- a/devstack/tools/ironic/templates/vm.xml
+++ b/devstack/tools/ironic/templates/vm.xml
@@ -30,19 +30,21 @@
   <on_crash>restart</on_crash>
   <devices>
     <emulator>{{ emulator }}</emulator>
+    {% for (imagefile, letter) in images %}
     <disk type='file' device='disk'>
       <driver name='qemu' type='{{ disk_format }}' cache='writeback'/>
       <source file='{{ imagefile }}'/>
       <!-- NOTE(lucasagomes): The virtio disk controller apparently does
            not work with UEFI, so let's use IDE. -->
       {% if uefi_loader %}
-          <target dev='vda' bus='ide'/>
-          <address type='drive' controller='0' bus='0' target='0' unit='0'/>
+          <target dev='vd{{ letter }}' bus='ide'/>
+          <address type='drive' controller='0' bus='0' target='0' unit='{{ loop.index }}'/>
       {% else %}
-          <target dev='vda' bus='virtio'/>
-          <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
+          <target dev='vd{{ letter }}' bus='virtio'/>
+          <address type='pci' domain='0x0000' bus='0x00' slot='0x0{{ letter }}' function='0x0'/>
       {% endif %}
     </disk>
+    {% endfor %}
     <controller type='ide' index='0'>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
     </controller>