Begin is_service_enabled() cleanup

This converts the special cases in the is_service_enabled() function to call
individual functions declared by the projects.  This allows projects that
are not in the DevStack repo and called via the extras.d plugin to handle
an equivalent service alias.

* Ceilometer
* Cinder
* Glance
* Neutron
* Nova
* Swift

TODO: remove the tests from is_service_enabled() after a transition period

Patch Set 2: Rebased

Change-Id: Ic78be433f93a9dd5f46be548bdbd4c984e0da6e7

clean.sh

@@ -97,7 +97,7 @@ if is_service_enabled ldap; then
 fi
 
 # Do the hypervisor cleanup until this can be moved back into lib/nova
-if [[ -r $NOVA_PLUGINS/hypervisor-$VIRT_DRIVER ]]; then
+if is_service_enabled nova && [[ -r $NOVA_PLUGINS/hypervisor-$VIRT_DRIVER ]]; then
     cleanup_nova_hypervisor
 fi
 

exercises/boot_from_volume.sh

@@ -30,14 +30,12 @@ TOP_DIR=$(cd $EXERCISE_DIR/..; pwd)
 # Import common functions
 source $TOP_DIR/functions
 
+# Import project functions
+source $TOP_DIR/lib/cinder
+
 # Import configuration
 source $TOP_DIR/openrc
 
-# Import neutron functions if needed
-if is_service_enabled neutron; then
-    source $TOP_DIR/lib/neutron
-fi
-
 # Import exercise configuration
 source $TOP_DIR/exerciserc
 

exercises/euca.sh

@@ -33,11 +33,6 @@ source $TOP_DIR/functions
 # Import EC2 configuration
 source $TOP_DIR/eucarc
 
-# Import neutron functions if needed
-if is_service_enabled neutron; then
-    source $TOP_DIR/lib/neutron
-fi
-
 # Import exercise configuration
 source $TOP_DIR/exerciserc
 

exercises/floating_ips.sh

@@ -27,14 +27,12 @@ TOP_DIR=$(cd $EXERCISE_DIR/..; pwd)
 # Import common functions
 source $TOP_DIR/functions
 
+# Import project functions
+source $TOP_DIR/lib/neutron
+
 # Import configuration
 source $TOP_DIR/openrc
 
-# Import neutron functions if needed
-if is_service_enabled neutron; then
-    source $TOP_DIR/lib/neutron
-fi
-
 # Import exercise configuration
 source $TOP_DIR/exerciserc
 

exercises/volumes.sh

@@ -27,14 +27,12 @@ TOP_DIR=$(cd $EXERCISE_DIR/..; pwd)
 # Import common functions
 source $TOP_DIR/functions
 
+# Import project functions
+source $TOP_DIR/lib/cinder
+
 # Import configuration
 source $TOP_DIR/openrc
 
-# Import neutron functions if needed
-if is_service_enabled neutron; then
-    source $TOP_DIR/lib/neutron
-fi
-
 # Import exercise configuration
 source $TOP_DIR/exerciserc
 

functions

@@ -840,6 +840,16 @@ function is_service_enabled() {
     services=$@
     for service in ${services}; do
         [[ ,${ENABLED_SERVICES}, =~ ,${service}, ]] && return 0
+
+        # Look for top-level 'enabled' function for this service
+        if type is_${service}_enabled >/dev/null 2>&1; then
+            # A function exists for this service, use it
+            is_${service}_enabled
+            return $?
+        fi
+
+        # TODO(dtroyer): Remove these legacy special-cases after the is_XXX_enabled()
+        #                are implemented
         [[ ${service} == n-cell-* && ${ENABLED_SERVICES} =~ "n-cell" ]] && return 0
         [[ ${service} == "nova" && ${ENABLED_SERVICES} =~ "n-" ]] && return 0
         [[ ${service} == "cinder" && ${ENABLED_SERVICES} =~ "c-" ]] && return 0

lib/ceilometer

@@ -59,7 +59,14 @@ TEMPEST_SERVICES+=,ceilometer
 
 # Functions
 # ---------
-#
+
+# Test if any Ceilometer services are enabled
+# is_ceilometer_enabled
+function is_ceilometer_enabled {
+    [[ ,${ENABLED_SERVICES} =~ ,"ceilometer-" ]] && return 0
+    return 1
+}
+
 # create_ceilometer_accounts() - Set up common required ceilometer accounts
 
 create_ceilometer_accounts() {

lib/cinder

@@ -85,6 +85,14 @@ TEMPEST_SERVICES+=,cinder
 
 # Functions
 # ---------
+
+# Test if any Cinder services are enabled
+# is_cinder_enabled
+function is_cinder_enabled {
+    [[ ,${ENABLED_SERVICES} =~ ,"c-" ]] && return 0
+    return 1
+}
+
 # _clean_lvm_lv removes all cinder LVM volumes
 #
 # Usage: _clean_lvm_lv $VOLUME_GROUP $VOLUME_NAME_PREFIX

lib/glance

@@ -59,6 +59,13 @@ TEMPEST_SERVICES+=,glance
 # Functions
 # ---------
 
+# Test if any Glance services are enabled
+# is_glance_enabled
+function is_glance_enabled {
+    [[ ,${ENABLED_SERVICES} =~ ,"g-" ]] && return 0
+    return 1
+}
+
 # cleanup_glance() - Remove residual data files, anything left over from previous
 # runs that a clean run would need to clean up
 function cleanup_glance() {

lib/neutron

@@ -244,6 +244,13 @@ TEMPEST_SERVICES+=,neutron
 # Functions
 # ---------
 
+# Test if any Neutron services are enabled
+# is_neutron_enabled
+function is_neutron_enabled {
+    [[ ,${ENABLED_SERVICES} =~ ,"q-" ]] && return 0
+    return 1
+}
+
 # configure_neutron()
 # Set common config for all neutron server and agents.
 function configure_neutron() {

lib/nova

@@ -129,6 +129,20 @@ TEMPEST_SERVICES+=,nova
 # Functions
 # ---------
 
+# Test if any Nova services are enabled
+# is_nova_enabled
+function is_nova_enabled {
+    [[ ,${ENABLED_SERVICES} =~ ,"n-" ]] && return 0
+    return 1
+}
+
+# Test if any Nova Cell services are enabled
+# is_nova_enabled
+function is_n-cell_enabled {
+    [[ ,${ENABLED_SERVICES} =~ ,"n-cell-" ]] && return 0
+    return 1
+}
+
 # Helper to clean iptables rules
 function clean_iptables() {
     # Delete rules

lib/swift

@@ -118,6 +118,13 @@ TEMPEST_SERVICES+=,swift
 # Functions
 # ---------
 
+# Test if any Swift services are enabled
+# is_swift_enabled
+function is_swift_enabled {
+    [[ ,${ENABLED_SERVICES} =~ ,"s-" ]] && return 0
+    return 1
+}
+
 # cleanup_swift() - Remove residual data files
 function cleanup_swift() {
     rm -f ${SWIFT_CONF_DIR}{*.builder,*.ring.gz,backups/*.builder,backups/*.ring.gz}

lib/template

@@ -10,6 +10,7 @@
 
 # ``stack.sh`` calls the entry points in this order:
 #
+# - is_XXXX_enabled
 # - install_XXXX
 # - configure_XXXX
 # - init_XXXX
@@ -35,6 +36,13 @@ XXX_CONF_DIR=/etc/XXXX
 # Entry Points
 # ------------
 
+# Test if any XXXX services are enabled
+# is_XXXX_enabled
+function is_XXXX_enabled {
+    [[ ,${ENABLED_SERVICES} =~ ,"XX-" ]] && return 0
+    return 1
+}
+
 # cleanup_XXXX() - Remove residual data files, anything left over from previous
 # runs that a clean run would need to clean up
 function cleanup_XXXX() {

stack.sh

@@ -1096,7 +1096,7 @@ if is_service_enabled s-proxy; then
 fi
 
 # Launch the Glance services
-if is_service_enabled g-api g-reg; then
+if is_service_enabled glance; then
     echo_summary "Starting Glance"
     start_glance
 fi

stackrc

@@ -35,7 +35,7 @@ fi
 #  enable_service neutron
 #  # Optional, to enable tempest configuration as part of devstack
 #  enable_service tempest
-ENABLED_SERVICES=g-api,g-reg,key,n-api,n-crt,n-obj,n-cpu,n-net,n-cond,cinder,c-sch,c-api,c-vol,n-sch,n-novnc,n-xvnc,n-cauth,horizon,rabbit,tempest,mysql
+ENABLED_SERVICES=g-api,g-reg,key,n-api,n-crt,n-obj,n-cpu,n-net,n-cond,c-sch,c-api,c-vol,n-sch,n-novnc,n-xvnc,n-cauth,horizon,rabbit,tempest,mysql
 
 # Tell Tempest which services are available.  The default is set here as
 # Tempest falls late in the configuration sequence.  This differs from

unstack.sh

@@ -104,7 +104,7 @@ if is_service_enabled nova; then
     stop_nova
 fi
 
-if is_service_enabled g-api g-reg; then
+if is_service_enabled glance; then
     stop_glance
 fi