Add cinder multi backend support to devstack
* add CINDER_MULTI_LVM_BACKEND parameter
* if CINDER_MULTI_LVM_BACKEND = True, creates 2 LVM volumes
- Name : stack-volumes and stack-volumes2
- Size : 5GB for each of them
Change-Id: I6e03b96e6b2aed0f0c166472300139fba9eaa68b
diff --git a/lib/cinder b/lib/cinder
index c8291a2..f487c8e 100644
--- a/lib/cinder
+++ b/lib/cinder
@@ -50,8 +50,13 @@
CINDER_BIN_DIR=$(get_python_exec_prefix)
fi
-# Name of the lvm volume group to use/create for iscsi volumes
+# Support for multi lvm backend configuration (default is no support)
+CINDER_MULTI_LVM_BACKEND=$(trueorfalse False $CINDER_MULTI_LVM_BACKEND)
+
+# Name of the lvm volume groups to use/create for iscsi volumes
+# VOLUME_GROUP2 is used only if CINDER_MULTI_LVM_BACKEND = True
VOLUME_GROUP=${VOLUME_GROUP:-stack-volumes}
+VOLUME_GROUP2=${VOLUME_GROUP2:-stack-volumes2}
VOLUME_NAME_PREFIX=${VOLUME_NAME_PREFIX:-volume-}
# _clean_volume_group removes all cinder volumes from the specified volume group
@@ -106,6 +111,9 @@
# Campsite rule: leave behind a volume group at least as clean as we found it
_clean_volume_group $VOLUME_GROUP $VOLUME_NAME_PREFIX
+ if [ "$CINDER_MULTI_LVM_BACKEND" = "True" ]; then
+ _clean_volume_group $VOLUME_GROUP2 $VOLUME_NAME_PREFIX
+ fi
}
# configure_cinder() - Set config files, create data dirs, etc
@@ -164,8 +172,18 @@
cp $CINDER_DIR/etc/cinder/cinder.conf.sample $CINDER_CONF
iniset $CINDER_CONF DEFAULT auth_strategy keystone
iniset $CINDER_CONF DEFAULT verbose True
- iniset $CINDER_CONF DEFAULT volume_group $VOLUME_GROUP
- iniset $CINDER_CONF DEFAULT volume_name_template ${VOLUME_NAME_PREFIX}%s
+ if [ "$CINDER_MULTI_LVM_BACKEND" = "True" ]; then
+ iniset $CINDER_CONF DEFAULT enabled_backends lvmdriver-1,lvmdriver-2
+ iniset $CINDER_CONF lvmdriver-1 volume_group $VOLUME_GROUP
+ iniset $CINDER_CONF lvmdriver-1 volume_driver cinder.volume.drivers.lvm.LVMISCSIDriver
+ iniset $CINDER_CONF lvmdriver-1 volume_backend_name LVM_iSCSI
+ iniset $CINDER_CONF lvmdriver-2 volume_group $VOLUME_GROUP2
+ iniset $CINDER_CONF lvmdriver-2 volume_driver cinder.volume.drivers.lvm.LVMISCSIDriver
+ iniset $CINDER_CONF lvmdriver-2 volume_backend_name LVM_iSCSI
+ else
+ iniset $CINDER_CONF DEFAULT volume_group $VOLUME_GROUP
+ iniset $CINDER_CONF DEFAULT volume_name_template ${VOLUME_NAME_PREFIX}%s
+ fi
iniset $CINDER_CONF DEFAULT iscsi_helper tgtadm
local dburl
database_connection_url dburl cinder
@@ -263,12 +281,14 @@
}
create_cinder_volume_group() {
- # Configure a default volume group called '`stack-volumes`' for the volume
- # service if it does not yet exist. If you don't wish to use a file backed
- # volume group, create your own volume group called ``stack-volumes`` before
- # invoking ``stack.sh``.
+ # According to the CINDER_MULTI_LVM_BACKEND value, configure one or two default volumes
+ # group called ``stack-volumes`` (and ``stack-volumes2``) for the volume
+ # service if it (they) does (do) not yet exist. If you don't wish to use a
+ # file backed volume group, create your own volume group called ``stack-volumes``
+ # and ``stack-volumes2`` before invoking ``stack.sh``.
#
- # By default, the backing file is 5G in size, and is stored in ``/opt/stack/data``.
+ # By default, the two backing files are 5G in size, and are stored in
+ # ``/opt/stack/data``.
if ! sudo vgs $VOLUME_GROUP; then
VOLUME_BACKING_FILE=${VOLUME_BACKING_FILE:-$DATA_DIR/${VOLUME_GROUP}-backing-file}
@@ -283,6 +303,23 @@
sudo vgcreate $VOLUME_GROUP $DEV
fi
fi
+ if [ "$CINDER_MULTI_LVM_BACKEND" = "True" ]; then
+ #set up the second volume if CINDER_MULTI_LVM_BACKEND is enabled
+
+ if ! sudo vgs $VOLUME_GROUP2; then
+ VOLUME_BACKING_FILE2=${VOLUME_BACKING_FILE2:-$DATA_DIR/${VOLUME_GROUP2}-backing-file}
+
+ # Only create if the file doesn't already exists
+ [[ -f $VOLUME_BACKING_FILE2 ]] || truncate -s $VOLUME_BACKING_FILE_SIZE $VOLUME_BACKING_FILE2
+
+ DEV=`sudo losetup -f --show $VOLUME_BACKING_FILE2`
+
+ # Only create if the loopback device doesn't contain $VOLUME_GROUP
+ if ! sudo vgs $VOLUME_GROUP2; then
+ sudo vgcreate $VOLUME_GROUP2 $DEV
+ fi
+ fi
+ fi
mkdir -p $CINDER_STATE_PATH/volumes
}
@@ -314,6 +351,9 @@
sudo tgtadm --op show --mode target | grep $VOLUME_NAME_PREFIX | grep Target | cut -f3 -d ' ' | sudo xargs -n1 tgt-admin --delete || true
# Start with a clean volume group
_clean_volume_group $VOLUME_GROUP $VOLUME_NAME_PREFIX
+ if [ "$CINDER_MULTI_LVM_BACKEND" = "True" ]; then
+ _clean_volume_group $VOLUME_GROUP2 $VOLUME_NAME_PREFIX
+ fi
fi
fi