openstack/devstack
Code Issues Proposed changes

Add cinder multi backend support to devstack

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* 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
This commit is contained in:
Jérôme Gallard 2013-02-22 17:28:10 +01:00
parent 555ecd07b0
commit dda2b7afc7
1 changed files with 48 additions and 8 deletions
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52
lib/cinder
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@ -50,8 +50,13 @@ else
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 @@ function cleanup_cinder() {
# 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 @@ function configure_cinder() {
cp $CINDER_DIR/etc/cinder/cinder.conf.sample $CINDER_CONF
iniset $CINDER_CONF DEFAULT auth_strategy keystone
iniset $CINDER_CONF DEFAULT verbose True
if [ "$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 @@ function create_cinder_cache_dir() {
}
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 @@ create_cinder_volume_group() {
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 @@ function init_cinder() {
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