Remove redundant relation interfaces.

Removes the cloud-controller and network-controller relations.  All of the
functionality contained in these hooks can be easily condensed into the
cloud-compute/nova-volume-services interfaces.  This simplifies deployment,
avoids redundant and ambigious relations and makes things generally cleaner.

hooks/lib/nova/nova-common

@@ -57,10 +57,16 @@ function configure_network_manager {
 function trigger_remote_service_restarts() {
   # Trigger a service restart on all other nova nodes that have a relation
   # via the cloud-controller interface.
-  local r_ids=$(relation-ids cloud-controller)
-  for r_id in $r_ids ; do
-    juju-log "$CHARM: Triggering a service restart on relation $r_id."
-    relation-set -r $r_id restart-trigger=$(uuid)
+
+  # possible relations to other nova services.
+  local relations="cloud-compute nova-volume-service"
+
+  for rel in $relations; do
+    local r_ids=$(relation-ids $rel)
+    for r_id in $r_ids ; do
+      juju-log "$CHARM: Triggering a service restart on relation $r_id."
+      relation-set -r $r_id restart-trigger=$(uuid)
+    done
   done
 }
 

hooks/lib/openstack-common

@@ -45,19 +45,6 @@ function service_ctl {
   done
 }
 
-function conditional_service_restart {
-  # restart specified service ($1) if contents of file differ from $2
-  local svc="$1"
-  local new_contents="$2"
-  local file="/var/lib/juju/$CHARM-restart"
-  if [[ -e "$file" ]] && [[ "$(cat $file)" == "$new_contents" ]] ; then
-    juju-log "$CHARM: Skipping conditional restart, not needed."
-    return 0
-  fi
-  echo "$new_contents" >$file
-  service_ctl "$svc" restart
-}
-
 function configure_install_source {
   # Setup and configure installation source based on a config flag.
   local src="$1"

hooks/network-manager-relation-joined

@@ -1 +0,0 @@
-nova-cloud-controller-relations

hooks/nova-cloud-controller-common

@@ -18,13 +18,6 @@ PACKAGES="$SERVICES python-mysqldb python-keystone uuid"
 NOVA_CONF=$(config-get nova-config)
 API_CONF="/etc/nova/api-paste.ini"
 
-# The specific flavor of volume service that exists (if any) is tracked
-# in this file.  It's updated by volume-service hooks and used by controller
-# hooks to inform backend nova services of how volume service is configured.
-VOLUME_SERVICE_FLAG_FILE=/var/lib/juju/volume_service.conf
-
-NETWORK_MANAGER=$(config-get network-manager)
-
 if [[ -e $CHARM_DIR/lib/nova/nova-common ]] ; then
   . $CHARM_DIR/lib/nova/nova-common
 else

hooks/nova-cloud-controller-relations

@@ -18,16 +18,7 @@ function install_hook {
   DEBIAN_FRONTEND=noninteractive apt-get -y \
     install --no-install-recommends $PACKAGES || exit 1
 
-  configure_network_manager $NETWORK_MANAGER
-
-#  # setup osapi extensions required for dashboard
-#  # these are the required middleware extensions as of 12/20/2011
-#  extensions="nova.api.openstack.compute.contrib.standard_extensions"
-#
-#  for e in $extensions ; do
-#    grep -q "^--osapi_compute_extension=$e" "$NOVA_CONF" ||
-#      echo "--osapi_compute_extension=$e" >>"$NOVA_CONF"
-#  done
+  configure_network_manager $(config-get network-manager)
 
   # Configure any flags specified in deployment config
   set_config_flags
@@ -136,16 +127,6 @@ function image-service_changed {
   service_ctl all restart
 }
 
-function nova-network_joined {
-  # this will be moved to its own nova-network formula when the
-  # time comes.  for now, tell peer what network manager we are
-  # using, and let them configure accordingly. we may want to also
-  # take care of assigning non-conflicting IPs to compute nodes
-  manager=$(cat $NOVA_CONF | grep network_manager | cut -d= -f2)
-  manager=$(echo $manager | sed -e 's/\./ /g' | awk '{ print $4 }')
-  relation-set network_manager=$manager ec2_host=$(unit-get private-address)
-}
-
 function keystone_joined {
   # we need to get two entries into keystone's catalog, nova + ec2
   # group, them by prepending $service_ to each setting. the keystone
@@ -254,15 +235,11 @@ volume_joined() {
   fi
 }
 
-volume_changed() {
-  # nothing to do here, yet.
-  exit 0
-}
-
-controller_joined() {
-  # this interface is used primarily trigger events on other nova units.
-  # it used currently to trigger service restarts on other nodes
-  return 0
+compute_joined() {
+  # Inform remote unit of the network manager we've been configured to use.
+  # nova-compute should configure itself accordingly.
+  relation-set network_manager=$(config-get network-manager)
+  relation-set ec2_host=$(unit-get private-address)
 }
 
 arg0=$(basename $0)
@@ -276,12 +253,10 @@ case $arg0 in
   "shared-db-relation-changed") db_changed ;;
   "image-service-relation-joined") exit 0 ;;
   "image-service-relation-changed") image-service_changed ;;
-  "network-manager-relation-joined") nova-network_joined ;;
   "identity-service-relation-joined") keystone_joined ;;
   "identity-service-relation-changed") keystone_changed ;;
-  "cloud-controller-relation-joined")  controller_joined ;;
-  "cloud-controller-relation-changed") exit 0 ;;
   "cinder-volume-service-relation-joined") volume_joined ;;
   "nova-volume-service-relation-joined") volume_joined ;;
+  "cloud-compute-relation-joined") compute_joined ;;
   *) exit 0 ;;
 esac

metadata.yaml

@@ -7,8 +7,6 @@ description: |
 provides:
   cloud-controller:
     interface: nova
-  network-manager:
-    interface: nova-network
 requires:
   shared-db:
     interface: mysql-shared

revision

@@ -1 +1 @@
-138
+141