9ee1ef6cb8
Change-Id: Ifb648c9eb4a57ac0fc97afb842e83286789801dd
187 lines
5.4 KiB
Bash
187 lines
5.4 KiB
Bash
#!/bin/bash
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#
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# lib/lvm
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# Configure the default LVM volume group used by Cinder and Nova
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# Dependencies:
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#
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# - ``functions`` file
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# - ``cinder`` configurations
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# DATA_DIR
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# clean_default_volume_group - called from clean()
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# configure_default_volume_group - called from configure()
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# init_default_volume_group - called from init()
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# Save trace setting
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MY_XTRACE=$(set +o | grep xtrace)
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set +o xtrace
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# Defaults
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# --------
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# Name of the lvm volume groups to use/create for iscsi volumes
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# This monkey-motion is for compatibility with icehouse-generation Grenade
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# If ``VOLUME_GROUP`` is set, use it, otherwise we'll build a VG name based
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# on ``VOLUME_GROUP_NAME`` that includes the backend name
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# Grenade doesn't use ``VOLUME_GROUP2`` so it is left out
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VOLUME_GROUP_NAME=${VOLUME_GROUP:-${VOLUME_GROUP_NAME:-stack-volumes}}
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DEFAULT_VOLUME_GROUP_NAME=$VOLUME_GROUP_NAME-default
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# Backing file name is of the form $VOLUME_GROUP$BACKING_FILE_SUFFIX
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BACKING_FILE_SUFFIX=-backing-file
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# Functions
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# ---------
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# _clean_lvm_volume_group removes all default LVM volumes
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#
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# Usage: clean_lvm_volume_group $vg
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function _clean_lvm_volume_group {
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local vg=$1
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# Clean out existing volumes
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sudo lvremove -f $vg
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}
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# _clean_lvm_backing_file() removes the backing file of the
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# volume group
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#
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# Usage: _clean_lvm_backing_file() $backing_file
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function _clean_lvm_backing_file {
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local backing_file=$1
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# If the backing physical device is a loop device, it was probably setup by DevStack
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if [[ -n "$backing_file" ]] && [[ -e "$backing_file" ]]; then
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local vg_dev=$(sudo losetup -j $backing_file | awk -F':' '/'$BACKING_FILE_SUFFIX'/ { print $1}')
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sudo losetup -d $vg_dev
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rm -f $backing_file
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fi
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}
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# clean_lvm_volume_group() cleans up the volume group and removes the
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# backing file
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#
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# Usage: clean_lvm_volume_group $vg
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function clean_lvm_volume_group {
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local vg=$1
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_clean_lvm_volume_group $vg
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# if there is no logical volume left, it's safe to attempt a cleanup
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# of the backing file
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if [[ -z "$(sudo lvs --noheadings -o lv_name $vg 2>/dev/null)" ]]; then
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_clean_lvm_backing_file $DATA_DIR/$vg$BACKING_FILE_SUFFIX
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fi
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}
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# _create_lvm_volume_group creates default volume group
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#
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# Usage: _create_lvm_volume_group() $vg $size
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function _create_lvm_volume_group {
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local vg=$1
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local size=$2
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local backing_file=$DATA_DIR/$vg$BACKING_FILE_SUFFIX
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if ! sudo vgs $vg; then
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# Only create if the file doesn't already exists
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[[ -f $backing_file ]] || truncate -s $size $backing_file
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local vg_dev=`sudo losetup -f --show $backing_file`
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# Only create volume group if it doesn't already exist
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if ! sudo vgs $vg; then
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sudo vgcreate $vg $vg_dev
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fi
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fi
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}
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# init_lvm_volume_group() initializes the volume group creating the backing
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# file if necessary
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#
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# Usage: init_lvm_volume_group() $vg
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function init_lvm_volume_group {
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local vg=$1
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local size=$2
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# Start the lvmetad and tgtd services
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if is_fedora || is_suse; then
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# services is not started by default
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start_service lvm2-lvmetad
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if [ "$CINDER_ISCSI_HELPER" = "tgtadm" ]; then
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start_service tgtd
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fi
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fi
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# Start with a clean volume group
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_create_lvm_volume_group $vg $size
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# Remove iscsi targets
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if [ "$CINDER_ISCSI_HELPER" = "lioadm" ]; then
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sudo cinder-rtstool get-targets | sudo xargs -rn 1 cinder-rtstool delete
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else
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sudo tgtadm --op show --mode target | grep Target | cut -f3 -d ' ' | sudo xargs -n1 tgt-admin --delete || true
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fi
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_clean_lvm_volume_group $vg
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}
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# Sentinal value to ensure that init of default lvm volume group is
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# only performed once across calls of init_default_lvm_volume_group.
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_DEFAULT_LVM_INIT=${_DEFAULT_LVM_INIT:-0}
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# init_default_lvm_volume_group() initializes a default volume group
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# intended to be shared between cinder and nova. It is idempotent;
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# the init of the default volume group is guaranteed to be performed
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# only once so that either or both of the dependent services can
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# safely call this function.
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#
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# Usage: init_default_lvm_volume_group()
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function init_default_lvm_volume_group {
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if [[ "$_DEFAULT_LVM_INIT" = "0" ]]; then
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init_lvm_volume_group $DEFAULT_VOLUME_GROUP_NAME $VOLUME_BACKING_FILE_SIZE
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_DEFAULT_LVM_INIT=1
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fi
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}
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# clean_lvm_filter() Remove the filter rule set in set_lvm_filter()
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#
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# Usage: clean_lvm_filter()
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function clean_lvm_filter {
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sudo sed -i "s/^.*# from devstack$//" /etc/lvm/lvm.conf
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}
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# set_lvm_filter() Gather all devices configured for LVM and
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# use them to build a global device filter
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# set_lvm_filter() Create a device filter
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# and add to /etc/lvm.conf. Note this uses
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# all current PV's in use by LVM on the
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# system to build it's filter.
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#
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# Usage: set_lvm_filter()
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function set_lvm_filter {
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local filter_suffix='"r|.*|" ] # from devstack'
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local filter_string="global_filter = [ "
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local pv
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local vg
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local line
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for pv_info in $(sudo pvs --noheadings -o name); do
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pv=$(echo -e "${pv_info}" | sed 's/ //g' | sed 's/\/dev\///g')
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new="\"a|$pv|\", "
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filter_string=$filter_string$new
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done
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filter_string=$filter_string$filter_suffix
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clean_lvm_filter
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sudo sed -i "/# global_filter = \[*\]/a\ $global_filter$filter_string" /etc/lvm/lvm.conf
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echo_summary "set lvm.conf device global_filter to: $filter_string"
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}
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# Restore xtrace
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$MY_XTRACE
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# mode: shell-script
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# End:
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