diff --git a/lib/ceilometer b/lib/ceilometer
index f6280d9..98a7e8f 100644
--- a/lib/ceilometer
+++ b/lib/ceilometer
@@ -75,11 +75,14 @@
 CEILOMETER_SERVICE_PROTOCOL=http
 CEILOMETER_SERVICE_HOST=$SERVICE_HOST
 CEILOMETER_SERVICE_PORT=${CEILOMETER_SERVICE_PORT:-8777}
-CEILOMETER_USE_MOD_WSGI=$(trueorfalse False $CEILOMETER_USE_MOD_WSGI)
+CEILOMETER_USE_MOD_WSGI=$(trueorfalse False CEILOMETER_USE_MOD_WSGI)
 
 # To enable OSprofiler change value of this variable to "notifications,profiler"
 CEILOMETER_NOTIFICATION_TOPICS=${CEILOMETER_NOTIFICATION_TOPICS:-notifications}
 
+CEILOMETER_COORDINATION_URL=${CEILOMETER_COORDINATION_URL:-}
+CEILOMETER_PIPELINE_INTERVAL=${CEILOMETER_PIPELINE_INTERVAL:-}
+
 # Tell Tempest this project is present
 TEMPEST_SERVICES+=,ceilometer
 
diff --git a/lib/cinder b/lib/cinder
index 177ddf0..7fc6949 100644
--- a/lib/cinder
+++ b/lib/cinder
@@ -68,7 +68,7 @@
 # Maintain this here for backward-compatibility with the old configuration
 # DEPRECATED: Use CINDER_ENABLED_BACKENDS instead
 # Support for multi lvm backend configuration (default is no support)
-CINDER_MULTI_LVM_BACKEND=$(trueorfalse False $CINDER_MULTI_LVM_BACKEND)
+CINDER_MULTI_LVM_BACKEND=$(trueorfalse False CINDER_MULTI_LVM_BACKEND)
 
 # Default backends
 # The backend format is type:name where type is one of the supported backend
@@ -85,7 +85,7 @@
 # Should cinder perform secure deletion of volumes?
 # Defaults to true, can be set to False to avoid this bug when testing:
 # https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1023755
-CINDER_SECURE_DELETE=`trueorfalse True $CINDER_SECURE_DELETE`
+CINDER_SECURE_DELETE=$(trueorfalse True CINDER_SECURE_DELETE)
 
 # Cinder reports allocations back to the scheduler on periodic intervals
 # it turns out we can get an "out of space" issue when we run tests too
diff --git a/lib/cinder_backends/lvm b/lib/cinder_backends/lvm
index a3ab5bf..280baf7 100644
--- a/lib/cinder_backends/lvm
+++ b/lib/cinder_backends/lvm
@@ -33,6 +33,7 @@
 # If ``VOLUME_GROUP`` is set, use it, otherwise we'll build a VG name based
 # on ``VOLUME_GROUP_NAME`` that includes the backend name
 # Grenade doesn't use ``VOLUME_GROUP2`` so it is left out
+VOLUME_GROUP=${VOLUME_GROUP:-}
 VOLUME_GROUP_NAME=${VOLUME_GROUP:-${VOLUME_GROUP_NAME:-stack-volumes}}
 
 # TODO: resurrect backing device...need to know how to set values
diff --git a/lib/database b/lib/database
index 366d2b3..896b8e1 100644
--- a/lib/database
+++ b/lib/database
@@ -23,6 +23,7 @@
 XTRACE=$(set +o | grep xtrace)
 set +o xtrace
 
+DATABASE_BACKENDS=""
 
 # Register a database backend
 #
@@ -30,7 +31,7 @@
 #
 # This is required to be defined before the specific database scripts are sourced
 function register_database {
-    [ -z "$DATABASE_BACKENDS" ] && DATABASE_BACKENDS=$1 || DATABASE_BACKENDS+=" $1"
+    DATABASE_BACKENDS+=" $1"
 }
 
 # Sourcing the database libs sets DATABASE_BACKENDS with the available list
diff --git a/lib/databases/mysql b/lib/databases/mysql
index 62c3d4c..42004c5 100644
--- a/lib/databases/mysql
+++ b/lib/databases/mysql
@@ -14,12 +14,22 @@
 
 register_database mysql
 
+# Linux distros, thank you for being incredibly consistent
+MYSQL=mysql
+if is_fedora; then
+    if [[ $DISTRO =~ (rhel6) ]]; then
+        MYSQL=mysqld
+    else
+        MYSQL=mariadb
+    fi
+fi
 
 # Functions
 # ---------
 
 # Get rid of everything enough to cleanly change database backends
 function cleanup_database_mysql {
+    stop_service $MYSQL
     if is_ubuntu; then
         # Get ruthless with mysql
         stop_service $MYSQL
diff --git a/lib/dib b/lib/dib
index 177f4c1..809217b 100644
--- a/lib/dib
+++ b/lib/dib
@@ -26,7 +26,7 @@
 # NOTE: Setting DIB_APT_SOURCES assumes you will be building
 # Debian/Ubuntu based images. Leave unset for other flavors.
 DIB_APT_SOURCES=${DIB_APT_SOURCES:-""}
-DIB_BUILD_OFFLINE=$(trueorfalse False $DIB_BUILD_OFFLINE)
+DIB_BUILD_OFFLINE=$(trueorfalse False DIB_BUILD_OFFLINE)
 DIB_IMAGE_CACHE=$DATA_DIR/diskimage-builder/image-create
 DIB_PIP_REPO=$DATA_DIR/diskimage-builder/pip-repo
 DIB_PIP_REPO_PORT=${DIB_PIP_REPO_PORT:-8899}
diff --git a/lib/heat b/lib/heat
index 544ec45..b2e5a12 100644
--- a/lib/heat
+++ b/lib/heat
@@ -37,13 +37,13 @@
 HEAT_CFNTOOLS_DIR=$DEST/heat-cfntools
 HEAT_TEMPLATES_REPO_DIR=$DEST/heat-templates
 HEAT_AUTH_CACHE_DIR=${HEAT_AUTH_CACHE_DIR:-/var/cache/heat}
-HEAT_STANDALONE=`trueorfalse False $HEAT_STANDALONE`
-HEAT_ENABLE_ADOPT_ABANDON=`trueorfalse False $HEAT_ENABLE_ADOPT_ABANDON`
+HEAT_STANDALONE=$(trueorfalse False HEAT_STANDALONE)
+HEAT_ENABLE_ADOPT_ABANDON=$(trueorfalse False HEAT_ENABLE_ADOPT_ABANDON)
 HEAT_CONF_DIR=/etc/heat
 HEAT_CONF=$HEAT_CONF_DIR/heat.conf
 HEAT_ENV_DIR=$HEAT_CONF_DIR/environment.d
 HEAT_TEMPLATES_DIR=$HEAT_CONF_DIR/templates
-HEAT_STACK_DOMAIN=`trueorfalse True $HEAT_STACK_DOMAIN`
+HEAT_STACK_DOMAIN=$(trueorfalse True HEAT_STACK_DOMAIN)
 HEAT_API_HOST=${HEAT_API_HOST:-$HOST_IP}
 HEAT_API_PORT=${HEAT_API_PORT:-8004}
 
diff --git a/lib/horizon b/lib/horizon
index fee2ef0..aa70bd5 100644
--- a/lib/horizon
+++ b/lib/horizon
@@ -173,7 +173,7 @@
     # Apache installation, because we mark it NOPRIME
     install_apache_wsgi
 
-    git_clone $HORIZON_REPO $HORIZON_DIR $HORIZON_BRANCH $HORIZON_TAG
+    git_clone $HORIZON_REPO $HORIZON_DIR $HORIZON_BRANCH
 }
 
 # start_horizon() - Start running processes, including screen
diff --git a/lib/ironic b/lib/ironic
index 55272b9..141b2fd 100644
--- a/lib/ironic
+++ b/lib/ironic
@@ -57,7 +57,7 @@
 # Set up defaults for functional / integration testing
 IRONIC_SCRIPTS_DIR=${IRONIC_SCRIPTS_DIR:-$TOP_DIR/tools/ironic/scripts}
 IRONIC_TEMPLATES_DIR=${IRONIC_TEMPLATES_DIR:-$TOP_DIR/tools/ironic/templates}
-IRONIC_BAREMETAL_BASIC_OPS=$(trueorfalse False $IRONIC_BAREMETAL_BASIC_OPS)
+IRONIC_BAREMETAL_BASIC_OPS=$(trueorfalse False IRONIC_BAREMETAL_BASIC_OPS)
 IRONIC_ENABLED_DRIVERS=${IRONIC_ENABLED_DRIVERS:-fake,pxe_ssh,pxe_ipmitool}
 IRONIC_SSH_USERNAME=${IRONIC_SSH_USERNAME:-`whoami`}
 IRONIC_SSH_KEY_DIR=${IRONIC_SSH_KEY_DIR:-$IRONIC_DATA_DIR/ssh_keys}
@@ -84,7 +84,7 @@
 IRONIC_VM_LOG_DIR=${IRONIC_VM_LOG_DIR:-$IRONIC_DATA_DIR/logs/}
 
 # Use DIB to create deploy ramdisk and kernel.
-IRONIC_BUILD_DEPLOY_RAMDISK=`trueorfalse True $IRONIC_BUILD_DEPLOY_RAMDISK`
+IRONIC_BUILD_DEPLOY_RAMDISK=$(trueorfalse True IRONIC_BUILD_DEPLOY_RAMDISK)
 # If not use DIB, these files are used as deploy ramdisk/kernel.
 # (The value must be a absolute path)
 IRONIC_DEPLOY_RAMDISK=${IRONIC_DEPLOY_RAMDISK:-}
@@ -113,7 +113,7 @@
 TEMPEST_SERVICES+=,ironic
 
 # Enable iPXE
-IRONIC_IPXE_ENABLED=$(trueorfalse False $IRONIC_IPXE_ENABLED)
+IRONIC_IPXE_ENABLED=$(trueorfalse False IRONIC_IPXE_ENABLED)
 IRONIC_HTTP_DIR=${IRONIC_HTTP_DIR:-$IRONIC_DATA_DIR/httpboot}
 IRONIC_HTTP_SERVER=${IRONIC_HTTP_SERVER:-$HOST_IP}
 IRONIC_HTTP_PORT=${IRONIC_HTTP_PORT:-8088}
diff --git a/lib/keystone b/lib/keystone
index 1599fa5..ad77bb3 100644
--- a/lib/keystone
+++ b/lib/keystone
@@ -71,6 +71,7 @@
 
 # Select Keystone's token format
 # Choose from 'UUID', 'PKI', or 'PKIZ'
+KEYSTONE_TOKEN_FORMAT=${KEYSTONE_TOKEN_FORMAT:-}
 KEYSTONE_TOKEN_FORMAT=$(echo ${KEYSTONE_TOKEN_FORMAT} | tr '[:upper:]' '[:lower:]')
 
 # Set Keystone interface configuration
diff --git a/lib/nova b/lib/nova
index 5ac9ff1..0e9282b 100644
--- a/lib/nova
+++ b/lib/nova
@@ -106,7 +106,7 @@
 
 # $NOVA_VNC_ENABLED can be used to forcibly enable vnc configuration.
 # In multi-node setups allows compute hosts to not run n-novnc.
-NOVA_VNC_ENABLED=$(trueorfalse False $NOVA_VNC_ENABLED)
+NOVA_VNC_ENABLED=$(trueorfalse False NOVA_VNC_ENABLED)
 
 # Get hypervisor configuration
 # ----------------------------
@@ -145,11 +145,11 @@
 # ``MULTI_HOST`` is a mode where each compute node runs its own network node.  This
 # allows network operations and routing for a VM to occur on the server that is
 # running the VM - removing a SPOF and bandwidth bottleneck.
-MULTI_HOST=`trueorfalse False $MULTI_HOST`
+MULTI_HOST=$(trueorfalse False MULTI_HOST)
 
 # ``NOVA_ALLOW_MOVE_TO_SAME_HOST` can be set to False in multi node devstack,
 # where there are at least two nova-computes.
-NOVA_ALLOW_MOVE_TO_SAME_HOST=`trueorfalse True $NOVA_ALLOW_MOVE_TO_SAME_HOST`
+NOVA_ALLOW_MOVE_TO_SAME_HOST=$(trueorfalse True NOVA_ALLOW_MOVE_TO_SAME_HOST)
 
 # Test floating pool and range are used for testing.  They are defined
 # here until the admin APIs can replace nova-manage
@@ -657,7 +657,7 @@
 
     if is_service_enabled n-novnc; then
         # a websockets/html5 or flash powered VNC console for vm instances
-        NOVNC_FROM_PACKAGE=`trueorfalse False $NOVNC_FROM_PACKAGE`
+        NOVNC_FROM_PACKAGE=$(trueorfalse False NOVNC_FROM_PACKAGE)
         if [ "$NOVNC_FROM_PACKAGE" = "True" ]; then
             NOVNC_WEB_DIR=/usr/share/novnc
             install_package novnc
@@ -669,7 +669,7 @@
 
     if is_service_enabled n-spice; then
         # a websockets/html5 or flash powered SPICE console for vm instances
-        SPICE_FROM_PACKAGE=`trueorfalse True $SPICE_FROM_PACKAGE`
+        SPICE_FROM_PACKAGE=$(trueorfalse True SPICE_FROM_PACKAGE)
         if [ "$SPICE_FROM_PACKAGE" = "True" ]; then
             SPICE_WEB_DIR=/usr/share/spice-html5
             install_package spice-html5
diff --git a/lib/nova_plugins/functions-libvirt b/lib/nova_plugins/functions-libvirt
index 4601eea..c136e35 100644
--- a/lib/nova_plugins/functions-libvirt
+++ b/lib/nova_plugins/functions-libvirt
@@ -15,7 +15,7 @@
 # --------
 
 # if we should turn on massive libvirt debugging
-DEBUG_LIBVIRT=$(trueorfalse False $DEBUG_LIBVIRT)
+DEBUG_LIBVIRT=$(trueorfalse False DEBUG_LIBVIRT)
 
 # Installs required distro-specific libvirt packages.
 function install_libvirt {
diff --git a/lib/nova_plugins/hypervisor-libvirt b/lib/nova_plugins/hypervisor-libvirt
index b1b4400..4d1eb6c 100644
--- a/lib/nova_plugins/hypervisor-libvirt
+++ b/lib/nova_plugins/hypervisor-libvirt
@@ -54,7 +54,7 @@
         iniset $NOVA_CONF DEFAULT vnc_enabled "false"
     fi
 
-    ENABLE_FILE_INJECTION=$(trueorfalse False $ENABLE_FILE_INJECTION)
+    ENABLE_FILE_INJECTION=$(trueorfalse False ENABLE_FILE_INJECTION)
     if [[ "$ENABLE_FILE_INJECTION" = "True" ]] ; then
         # When libguestfs is available for file injection, enable using
         # libguestfs to inspect the image and figure out the proper
diff --git a/lib/rpc_backend b/lib/rpc_backend
index 778d466..d87d620 100644
--- a/lib/rpc_backend
+++ b/lib/rpc_backend
@@ -21,6 +21,11 @@
 XTRACE=$(set +o | grep xtrace)
 set +o xtrace
 
+RPC_MESSAGING_PROTOCOL=${RPC_MESSAGING_PROTOCOL:-0.9}
+
+# TODO(sdague): RPC backend selection is super wonky because we treat
+# messaging server as a service, which it really isn't for multi host
+QPID_HOST=${QPID_HOST:-}
 
 # Functions
 # ---------
@@ -68,9 +73,6 @@
 function cleanup_rpc_backend {
     if is_service_enabled rabbit; then
         # Obliterate rabbitmq-server
-        if [ -n "$RABBIT_USERID" ]; then
-            sudo rabbitmqctl delete_user "$RABBIT_USERID"
-        fi
         uninstall_package rabbitmq-server
         sudo killall epmd || sudo killall -9 epmd
         if is_ubuntu; then
diff --git a/lib/swift b/lib/swift
index e9043b3..b5577d8 100644
--- a/lib/swift
+++ b/lib/swift
@@ -82,7 +82,7 @@
 
 # Set ``SWIFT_EXTRAS_MIDDLEWARE_LAST`` to extras middlewares that need to be at
 # the end of the pipeline.
-SWIFT_EXTRAS_MIDDLEWARE_LAST=${SWIFT_EXTRAS_MIDDLEWARE_LAST}
+SWIFT_EXTRAS_MIDDLEWARE_LAST=${SWIFT_EXTRAS_MIDDLEWARE_LAST:-}
 
 # Set ``SWIFT_EXTRAS_MIDDLEWARE_NO_AUTH`` to extras middlewares that need to be at
 # the beginning of the pipeline, before authentication middlewares.
@@ -127,7 +127,7 @@
 
 # Enable tempurl feature
 SWIFT_ENABLE_TEMPURLS=${SWIFT_ENABLE_TEMPURLS:-False}
-SWIFT_TEMPURL_KEY=${SWIFT_TEMPURL_KEY}
+SWIFT_TEMPURL_KEY=${SWIFT_TEMPURL_KEY:-}
 
 # Tell Tempest this project is present
 TEMPEST_SERVICES+=,swift
diff --git a/lib/tempest b/lib/tempest
index d31119b..a525b85 100644
--- a/lib/tempest
+++ b/lib/tempest
@@ -75,8 +75,8 @@
 TEMPEST_STORAGE_PROTOCOL=${TEMPEST_STORAGE_PROTOCOL:-$TEMPEST_DEFAULT_STORAGE_PROTOCOL}
 
 # Neutron/Network variables
-IPV6_ENABLED=$(trueorfalse True $IPV6_ENABLED)
-IPV6_SUBNET_ATTRIBUTES_ENABLED=$(trueorfalse True $IPV6_SUBNET_ATTRIBUTES_ENABLED)
+IPV6_ENABLED=$(trueorfalse True IPV6_ENABLED)
+IPV6_SUBNET_ATTRIBUTES_ENABLED=$(trueorfalse True IPV6_SUBNET_ATTRIBUTES_ENABLED)
 
 # Functions
 # ---------