Move nova volumes to lib/n-vol
The next in a line of changes to break down stack.sh and make
it a bit more manageable.
Part of blueprint devstack-modular
Change-Id: I9f7ba23391851959412779f842934f5b26724713
diff --git a/lib/n-vol b/lib/n-vol
new file mode 100644
index 0000000..30be0cd
--- /dev/null
+++ b/lib/n-vol
@@ -0,0 +1,118 @@
+# lib/n-vol
+# Install and start Nova volume service
+
+# Dependencies:
+# - functions
+# - KEYSTONE_AUTH_* must be defined
+# SERVICE_{TENANT_NAME|PASSWORD} must be defined
+
+# stack.sh
+# ---------
+# install_nvol
+# configure_nvol
+# init_nvol
+# start_nvol
+# stop_nvol
+# cleanup_nvol
+
+# Print the commands being run so that we can see the command that triggers
+# an error. It is also useful for following along as the install occurs.
+set -o xtrace
+
+
+# Defaults
+# --------
+
+# Name of the LVM volume group to use/create for iscsi volumes
+VOLUME_GROUP=${VOLUME_GROUP:-stack-volumes}
+VOLUME_NAME_PREFIX=${VOLUME_NAME_PREFIX:-volume-}
+
+
+# cleanup_nvol() - Remove residual data files, anything left over from previous
+# runs that a clean run would need to clean up
+function cleanup_nvol() {
+ # kill instances (nova)
+ # delete image files (glance)
+ # This function intentionally left blank
+ :
+}
+
+# configure_nvol() - Set config files, create data dirs, etc
+function configure_nvol() {
+ # sudo python setup.py deploy
+ # iniset $XXX_CONF ...
+ # This function intentionally left blank
+ :
+}
+
+# init_nvol() - Initialize databases, etc.
+function init_nvol() {
+ # 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``.
+ #
+ # By default, the backing file is 5G in size, and is stored in ``/opt/stack/data``.
+
+ if ! sudo vgs $VOLUME_GROUP; then
+ VOLUME_BACKING_FILE=${VOLUME_BACKING_FILE:-$DATA_DIR/${VOLUME_GROUP}-backing-file}
+ # Only create if the file doesn't already exists
+ [[ -f $VOLUME_BACKING_FILE ]] || truncate -s $VOLUME_BACKING_FILE_SIZE $VOLUME_BACKING_FILE
+ DEV=`sudo losetup -f --show $VOLUME_BACKING_FILE`
+ # Only create if the loopback device doesn't contain $VOLUME_GROUP
+ if ! sudo vgs $VOLUME_GROUP; then sudo vgcreate $VOLUME_GROUP $DEV; fi
+ fi
+
+ mkdir -p $NOVA_DIR/volumes
+
+ if sudo vgs $VOLUME_GROUP; then
+ if [[ "$os_PACKAGE" = "rpm" ]]; then
+ # RPM doesn't start the service
+ start_service tgtd
+ fi
+
+ # Remove nova iscsi targets
+ sudo tgtadm --op show --mode target | grep $VOLUME_NAME_PREFIX | grep Target | cut -f3 -d ' ' | sudo xargs -n1 tgt-admin --delete || true
+ # Clean out existing volumes
+ for lv in `sudo lvs --noheadings -o lv_name $VOLUME_GROUP`; do
+ # ``VOLUME_NAME_PREFIX`` prefixes the LVs we want
+ if [[ "${lv#$VOLUME_NAME_PREFIX}" != "$lv" ]]; then
+ sudo lvremove -f $VOLUME_GROUP/$lv
+ fi
+ done
+ fi
+}
+
+# install_nvol() - Collect source and prepare
+function install_nvol() {
+ # git clone xxx
+ # Install is handled when installing Nova
+ :
+}
+
+# start_nvol() - Start running processes, including screen
+function start_nvol() {
+ # Setup the tgt configuration file
+ if [[ ! -f /etc/tgt/conf.d/nova.conf ]]; then
+ sudo mkdir -p /etc/tgt/conf.d
+ echo "include $NOVA_DIR/volumes/*" | sudo tee /etc/tgt/conf.d/nova.conf
+ fi
+
+ if [[ "$os_PACKAGE" = "deb" ]]; then
+ # tgt in oneiric doesn't restart properly if tgtd isn't running
+ # do it in two steps
+ sudo stop tgt || true
+ sudo start tgt
+ else
+ restart_service tgtd
+ fi
+
+ screen_it n-vol "cd $NOVA_DIR && $NOVA_DIR/bin/nova-volume"
+}
+
+# stop_nvol() - Stop running processes (non-screen)
+function stop_nvol() {
+ # FIXME(dtroyer): stop only the n-vol screen window?
+
+ stop_service tgt
+}