OpenStack: Split neutron config up into MANAGER, CONTROLLER and AGENT

This adds NEUTRON_ENABLE_{MANAGER,CONTROLLER,AGENT} to determine which
parts should be run on a node, so a network node has MANAGER enabled,
but doesn't need CONTROLLER or AGENT, since those will be run on the
controller and compute nodes respectively.

This works by the configuration extension selectively enabling systemd
units, with config-setup always being run, and db-setup run on the
controller node.

Rather than having the enable logic in 3 distinct setup services, their
dependencies have been augmented to run after appropriate setup services
if they are enabled, and to not run if their configuration hasn't been
created.

Change-Id: I7625074c94acfb49fc68660440609b0fe9c0052d

1 files changed, 69 insertions, 13 deletions

diff --git a/openstack-neutron.configure b/openstack-neutron.configure
index 50a6d1e4..04a0da5c 100644
--- a/openstack-neutron.configure
+++ b/openstack-neutron.configure
@@ -18,19 +18,16 @@ set -e
 
 ROOT="$1"
 
-##########################################################################
-
-ln -sf "/usr/lib/systemd/system/openstack-neutron-setup.service" \
-        "$ROOT/etc/systemd/system/multi-user.target.wants/openstack-neutron-setup.service"
+enable(){
+    ln -sf "/usr/lib/systemd/system/openstack-neutron-$1.service" \
+            "$ROOT/etc/systemd/system/multi-user.target.wants/openstack-neutron-$1.service"
+}
 
-#############################################
-# Ensure /var/run is an appropriate symlink #
-#############################################
+unrecognised_value(){
+    eval echo Unrecognised value \$$1 for $1 >&2
+    exit 1
+}
 
-if ! link="$(readlink "$ROOT/var/run")" || [ "$link" != ../run ]; then
-    rm -rf "$ROOT/var/run"
-    ln -s ../run "$ROOT/var/run"
-fi
 
 ##########################################################################
 # Check variables
@@ -51,7 +48,7 @@ if [ -z "$NEUTRON_SERVICE_USER" -a \
      -z "$CONTROLLER_HOST_ADDRESS" -a \
      -z "$MANAGEMENT_INTERFACE_IP_ADDRESS" -a \
      -z "$KEYSTONE_TEMPORARY_ADMIN_TOKEN" ]; then
-     # No NOVA options defined, do nothing.
+     # No Neutron options defined, do nothing.
      exit 0
 fi
 
@@ -69,10 +66,69 @@ if [ -z "$NEUTRON_SERVICE_USER" -o \
      -z "$CONTROLLER_HOST_ADDRESS" -o \
      -z "$MANAGEMENT_INTERFACE_IP_ADDRESS" -o \
      -z "$KEYSTONE_TEMPORARY_ADMIN_TOKEN" ]; then
-    echo Some options required for Nova were defined, but not all.
+    echo Some options required for Neutron were defined, but not all.
     exit 1
 fi
 
+#############################################
+# Ensure /var/run is an appropriate symlink #
+#############################################
+
+if ! link="$(readlink "$ROOT/var/run")" || [ "$link" != ../run ]; then
+    rm -rf "$ROOT/var/run"
+    ln -s ../run "$ROOT/var/run"
+fi
+
+###################
+# Enable services #
+###################
+
+if [ x"${NEUTRON_ENABLE_CONTROLLER=True}" = xTrue -o \
+     x"${NEUTRON_ENABLE_MANAGER=True}" = xTrue -o \
+     x"${NEUTRON_ENABLE_AGENT=True}" = xTrue ]; then
+    enable config-setup
+fi
+
+case "${NEUTRON_ENABLE_CONTROLLER}" in
+True|yes|y)
+    enable config-setup
+    enable db-setup
+    enable server
+    ;;
+False|no|n|'')
+    ;;
+*)
+    unrecognised_value NEUTRON_ENABLE_CONTROLLER
+    ;;
+esac
+
+case "${NEUTRON_ENABLE_MANAGER}" in
+True|yes|y)
+    enable config-setup
+    enable ovs-cleanup
+    enable dhcp-agent
+    enable l3-agent
+    enable plugin-openvswitch-agent
+    ;;
+False|no|n|'')
+    ;;
+*)
+    unrecognised_value NEUTRON_ENABLE_MANAGER
+    ;;
+esac
+
+case "${NEUTRON_ENABLE_AGENT}" in
+True|yes|y)
+    enable config-setup
+    enable plugin-openvswitch-agent
+    ;;
+False|no|n|'')
+    ;;
+*)
+    unrecognised_value NEUTRON_ENABLE_AGENT
+    ;;
+esac
+
 ##########################################################################
 # Generate config variable shell snippet
 ##########################################################################