@@ -57,6 +57,15 @@ If the EC2 API is your cup-o-tea, you can create credentials and use euca2ools:

 You can override environment variables used in `stack.sh` by creating file name `localrc`.  It is likely that you will need to do this to tweak your networking configuration should you need to access your cloud from a different host.

+# Database Backend

+

+Multiple database backends are available. The available databases are defined in the lib/databases directory.

+To choose a database backend, add a line to your `localrc` like:

+

+    use_database postgresql

+

+By default, the mysql database backend is used.

+

 # RPC Backend

 Multiple RPC backends are available. Currently, this

new file mode 100644

@@ -0,0 +1 @@

+python-psycopg2

new file mode 100644

@@ -0,0 +1 @@

+python-psycopg2

@@ -836,6 +836,21 @@ function upload_image() {

     fi

 }

+# Toggle enable/disable_service for services that must run exclusive of each other

+#  $1 The name of a variable containing a space-separated list of services

+#  $2 The name of a variable in which to store the enabled service's name

+#  $3 The name of the service to enable

+function use_exclusive_service {

+    local options=${!1}

+    local selection=$3

+    out=$2

+    [ -z $selection ] || [[ ! "$options" =~ "$selection" ]] && return 1

+    for opt in $options;do

+        [[ "$opt" = "$selection" ]] && enable_service $opt || disable_service $opt

+    done

+    eval "$out=$selection"

+    return 0

+}

 # Wrapper for ``yum`` to set proxy environment variables

 # Uses globals ``OFFLINE``, ``*_proxy`

@@ -112,7 +112,9 @@ function configure_cinder() {

     iniset $CINDER_CONF DEFAULT volume_group $VOLUME_GROUP

     iniset $CINDER_CONF DEFAULT volume_name_template ${VOLUME_NAME_PREFIX}%s

     iniset $CINDER_CONF DEFAULT iscsi_helper tgtadm

-    iniset $CINDER_CONF DEFAULT sql_connection $BASE_SQL_CONN/cinder?charset=utf8

+    local dburl

+    database_connection_url dburl cinder

+    iniset $CINDER_CONF DEFAULT sql_connection $dburl

     iniset $CINDER_CONF DEFAULT api_paste_config $CINDER_API_PASTE_INI

     iniset $CINDER_CONF DEFAULT root_helper "sudo ${CINDER_ROOTWRAP}"

     iniset $CINDER_CONF DEFAULT osapi_volume_extension cinder.api.openstack.volume.contrib.standard_extensions

@@ -141,10 +143,9 @@ function init_cinder() {

     # Force nova volumes off

     NOVA_ENABLED_APIS=$(echo $NOVA_ENABLED_APIS | sed "s/osapi_volume,//")

-    if is_service_enabled mysql; then

+    if is_service_enabled $DATABASE_BACKENDS; then

         # (re)create cinder database

-        mysql -u$MYSQL_USER -p$MYSQL_PASSWORD -e 'DROP DATABASE IF EXISTS cinder;'

-        mysql -u$MYSQL_USER -p$MYSQL_PASSWORD -e 'CREATE DATABASE cinder;'

+        recreate_database cinder utf8

         # (re)create cinder database

         $CINDER_BIN_DIR/cinder-manage db sync

new file mode 100644

@@ -0,0 +1,103 @@

+# lib/database

+# Interface for interacting with different database backends

+

+# Dependencies:

+# DATABASE_BACKENDS variable must contain a list of available database backends

+# DATABASE_TYPE variable must be set

+

+# Each database must implement four functions:

+#   recreate_database_$DATABASE_TYPE

+#   install_database_$DATABASE_TYPE

+#   configure_database_$DATABASE_TYPE

+#   database_connection_url_$DATABASE_TYPE

+#

+# and call register_database $DATABASE_TYPE

+

+# Save trace setting

+XTRACE=$(set +o | grep xtrace)

+set +o xtrace

+

+# Register a database backend

+#  $1 The name of the database backend

+function register_database {

+    [ -z "$DATABASE_BACKENDS" ] && DATABASE_BACKENDS=$1 || DATABASE_BACKENDS+=" $1"

+}

+

+for f in $TOP_DIR/lib/databases/*; do source $f; done

+

+# Set the database type based on the configuration

+function initialize_database_backends {

+    for backend in $DATABASE_BACKENDS; do

+        is_service_enabled $backend && DATABASE_TYPE=$backend

+    done

+

+    [ -z "$DATABASE_TYPE" ] && return 1

+

+    # For backward-compatibility, read in the MYSQL_HOST/USER variables and use

+    # them as the default values for the DATABASE_HOST/USER variables.

+    MYSQL_HOST=${MYSQL_HOST:-localhost}

+    MYSQL_USER=${MYSQL_USER:-root}

+

+    DATABASE_HOST=${DATABASE_HOST:-${MYSQL_HOST}}

+    DATABASE_USER=${DATABASE_USER:-${MYSQL_USER}}

+

+    if [ -n "$MYSQL_PASSWORD" ]; then

+        DATABASE_PASSWORD=$MYSQL_PASSWORD

+    else

+        read_password DATABASE_PASSWORD "ENTER A PASSWORD TO USE FOR THE DATABASE."

+    fi

+

+    # We configure Nova, Horizon, Glance and Keystone to use MySQL as their

+    # database server.  While they share a single server, each has their own

+    # database and tables.

+

+    # By default this script will install and configure MySQL.  If you want to

+    # use an existing server, you can pass in the user/password/host parameters.

+    # You will need to send the same ``DATABASE_PASSWORD`` to every host if you are doing

+    # a multi-node DevStack installation.

+

+    # NOTE: Don't specify ``/db`` in this string so we can use it for multiple services

+    BASE_SQL_CONN=${BASE_SQL_CONN:-${DATABASE_TYPE}://$DATABASE_USER:$DATABASE_PASSWORD@$DATABASE_HOST}

+

+    return 0

+}

+

+# Set the database backend to use

+#  $1 The name of the database backend to use (mysql, postgresql, ...)

+function use_database {

+    use_exclusive_service DATABASE_BACKENDS DATABASE_TYPE $1 && return 0

+    ret=$?

+    echo "Invalid database '$1'"

+    return $ret

+}

+

+# Recreate a given database

+#  $1 The name of the database

+#  $2 The character set/encoding of the database

+function recreate_database {

+    local db=$1

+    local charset=$2

+    recreate_database_$DATABASE_TYPE $db $charset

+}

+

+# Install the database

+function install_database {

+    install_database_$DATABASE_TYPE

+}

+

+# Configure and start the database

+function configure_database {

+    configure_database_$DATABASE_TYPE

+}

+

+# Generate an SQLAlchemy connection URL and store it in a variable

+#  $1 The variable name in which to store the connection URL

+#  $2 The name of the database

+function database_connection_url {

+    local var=$1

+    local db=$2

+    database_connection_url_$DATABASE_TYPE $var $db

+}

+

+# Restore xtrace

+$XTRACE

new file mode 100644

@@ -0,0 +1,93 @@

+# lib/mysql

+# Functions to control the configuration and operation of the MySQL database backend

+

+# Dependencies:

+# DATABASE_{HOST,USER,PASSWORD} must be defined

+

+# Save trace setting

+XTRACE=$(set +o | grep xtrace)

+set +o xtrace

+

+register_database mysql

+

+function recreate_database_mysql {

+    local db=$1

+    local charset=$2

+    mysql -u$DATABASE_USER -p$DATABASE_PASSWORD -e "DROP DATABASE IF EXISTS $db;"

+    mysql -u$DATABASE_USER -p$DATABASE_PASSWORD -e "CREATE DATABASE $db CHARACTER SET $charset;"

+}

+

+function configure_database_mysql {

+    echo_summary "Configuring and starting MySQL"

+

+    if [[ "$os_PACKAGE" = "deb" ]]; then

+        MY_CONF=/etc/mysql/my.cnf

+        MYSQL=mysql

+    else

+        MY_CONF=/etc/my.cnf

+        MYSQL=mysqld

+    fi

+

+    # Start mysql-server

+    if [[ "$os_PACKAGE" = "rpm" ]]; then

+        # RPM doesn't start the service

+        start_service $MYSQL

+        # Set the root password - only works the first time

+        sudo mysqladmin -u root password $DATABASE_PASSWORD || true

+    fi

+    # Update the DB to give user ‘$DATABASE_USER’@’%’ full control of the all databases:

+    sudo mysql -uroot -p$DATABASE_PASSWORD -h127.0.0.1 -e "GRANT ALL PRIVILEGES ON *.* TO '$DATABASE_USER'@'%' identified by '$DATABASE_PASSWORD';"

+

+    # Now update ``my.cnf`` for some local needs and restart the mysql service

+

+    # Change ‘bind-address’ from localhost (127.0.0.1) to any (0.0.0.0)

+    sudo sed -i '/^bind-address/s/127.0.0.1/0.0.0.0/g' $MY_CONF

+

+    # Set default db type to InnoDB

+    if sudo grep -q "default-storage-engine" $MY_CONF; then

+        # Change it

+        sudo bash -c "source $TOP_DIR/functions; iniset $MY_CONF mysqld default-storage-engine InnoDB"

+    else

+        # Add it

+        sudo sed -i -e "/^\[mysqld\]/ a \

+default-storage-engine = InnoDB" $MY_CONF

+    fi

+

+    restart_service $MYSQL

+}

+

+function install_database_mysql {

+    if [[ "$os_PACKAGE" = "deb" ]]; then

+        # Seed configuration with mysql password so that apt-get install doesn't

+        # prompt us for a password upon install.

+        cat <<MYSQL_PRESEED | sudo debconf-set-selections

+mysql-server-5.1 mysql-server/root_password password $DATABASE_PASSWORD

+mysql-server-5.1 mysql-server/root_password_again password $DATABASE_PASSWORD

+mysql-server-5.1 mysql-server/start_on_boot boolean true

+MYSQL_PRESEED

+    fi

+

+    # while ``.my.cnf`` is not needed for OpenStack to function, it is useful

+    # as it allows you to access the mysql databases via ``mysql nova`` instead

+    # of having to specify the username/password each time.

+    if [[ ! -e $HOME/.my.cnf ]]; then

+        cat <<EOF >$HOME/.my.cnf

+[client]

+user=$DATABASE_USER

+password=$DATABASE_PASSWORD

+host=$DATABASE_HOST

+EOF

+        chmod 0600 $HOME/.my.cnf

+    fi

+    # Install mysql-server

+    install_package mysql-server

+}

+

+function database_connection_url_mysql {

+    local output=$1

+    local db=$2

+    eval "$output=$BASE_SQL_CONN/$db?charset=utf8"

+}

+

+# Restore xtrace

+$XTRACE

new file mode 100644

@@ -0,0 +1,70 @@

+# lib/postgresql

+# Functions to control the configuration and operation of the PostgreSQL database backend

+

+# Dependencies:

+# DATABASE_{HOST,USER,PASSWORD} must be defined

+

+# Save trace setting

+XTRACE=$(set +o | grep xtrace)

+set +o xtrace

+

+register_database postgresql

+

+function recreate_database_postgresql {

+    local db=$1

+    local charset=$2

+    # Avoid unsightly error when calling dropdb when the database doesn't exist

+    psql -h$DATABASE_HOST -U$DATABASE_USER -dtemplate1 -c "DROP DATABASE IF EXISTS $db"

+    createdb -h $DATABASE_HOST -U$DATABASE_USER -l C -T template0 -E $charset $db

+}

+

+function configure_database_postgresql {

+    echo_summary "Configuring and starting PostgreSQL"

+    if [[ "$os_PACKAGE" = "rpm" ]]; then

+        PG_HBA=/var/lib/pgsql/data/pg_hba.conf

+        PG_CONF=/var/lib/pgsql/data/postgresql.conf

+    else

+        PG_DIR=`find /etc/postgresql -name pg_hba.conf|xargs dirname`

+        PG_HBA=$PG_DIR/pg_hba.conf

+        PG_CONF=$PG_DIR/postgresql.conf

+    fi

+    sudo [ -e /var/lib/pgsql/data ] || sudo postgresql-setup initdb

+    # Listen on all addresses

+    sudo sed -i "/listen_addresses/s/.*/listen_addresses = '*'/" $PG_CONF

+    # Do password auth from all IPv4 clients

+    sudo sed -i "/^host/s/all\s\+127.0.0.1\/32\s\+ident/$DATABASE_USER\t0.0.0.0\/0\tpassword/" $PG_HBA

+    # Do password auth for all IPv6 clients

+    sudo sed -i "/^host/s/all\s\+::1\/128\s\+ident/$DATABASE_USER\t::0\/0\tpassword/" $PG_HBA

+    start_service postgresql

+

+    # If creating the role fails, chances are it already existed. Try to alter it.

+    sudo -u postgres -i psql -c "CREATE ROLE $DATABASE_USER WITH SUPERUSER LOGIN PASSWORD '$DATABASE_PASSWORD'" || \

+    sudo -u postgres -i psql -c "ALTER ROLE $DATABASE_USER WITH SUPERUSER LOGIN PASSWORD '$DATABASE_PASSWORD'"

+}

+

+function install_database_postgresql {

+    echo_summary "Installing postgresql"

+    PGPASS=$HOME/.pgpass

+    if [[ ! -e $PGPASS ]]; then

+        cat <<EOF > $PGPASS

+*:*:*:$DATABASE_USER:$DATABASE_PASSWORD

+EOF

+        chmod 0600 $PGPASS

+    else

+        sed -i "s/:root:\w\+/:root:$DATABASE_PASSWORD/" $PGPASS

+    fi

+    if [[ "$os_PACKAGE" = "rpm" ]]; then

+        install_package postgresql-server

+    else

+        install_package postgresql

+    fi

+}

+

+function database_connection_url_postgresql {

+    local output=$1

+    local db=$2

+    eval "$output=$BASE_SQL_CONN/$db?client_encoding=utf8"

+}

+

+# Restore xtrace

+$XTRACE

@@ -81,7 +81,9 @@ function configure_glance() {

     cp $GLANCE_DIR/etc/glance-registry.conf $GLANCE_REGISTRY_CONF

     iniset $GLANCE_REGISTRY_CONF DEFAULT debug True

     inicomment $GLANCE_REGISTRY_CONF DEFAULT log_file

-    iniset $GLANCE_REGISTRY_CONF DEFAULT sql_connection $BASE_SQL_CONN/glance?charset=utf8

+    local dburl

+    database_connection_url dburl glance

+    iniset $GLANCE_REGISTRY_CONF DEFAULT sql_connection $dburl

     iniset $GLANCE_REGISTRY_CONF DEFAULT use_syslog $SYSLOG

     iniset $GLANCE_REGISTRY_CONF paste_deploy flavor keystone

     iniset $GLANCE_REGISTRY_CONF keystone_authtoken auth_host $KEYSTONE_AUTH_HOST

@@ -95,7 +97,7 @@ function configure_glance() {

     cp $GLANCE_DIR/etc/glance-api.conf $GLANCE_API_CONF

     iniset $GLANCE_API_CONF DEFAULT debug True

     inicomment $GLANCE_API_CONF DEFAULT log_file

-    iniset $GLANCE_API_CONF DEFAULT sql_connection $BASE_SQL_CONN/glance?charset=utf8

+    iniset $GLANCE_API_CONF DEFAULT sql_connection $dburl

     iniset $GLANCE_API_CONF DEFAULT use_syslog $SYSLOG

     iniset $GLANCE_API_CONF DEFAULT filesystem_store_datadir $GLANCE_IMAGE_DIR/

     iniset $GLANCE_API_CONF DEFAULT image_cache_dir $GLANCE_CACHE_DIR/

@@ -149,8 +151,7 @@ function init_glance() {

     mkdir -p $GLANCE_CACHE_DIR

     # (re)create glance database

-    mysql -u$MYSQL_USER -p$MYSQL_PASSWORD -e 'DROP DATABASE IF EXISTS glance;'

-    mysql -u$MYSQL_USER -p$MYSQL_PASSWORD -e 'CREATE DATABASE glance CHARACTER SET utf8;'

+    recreate_database glance utf8

     $GLANCE_BIN_DIR/glance-manage db_sync

 }

@@ -120,7 +120,9 @@ function configure_heat() {

     iniset $HEAT_ENGINE_CONF DEFAULT use_syslog $SYSLOG

     iniset $HEAT_ENGINE_CONF DEFAULT bind_host $HEAT_ENGINE_HOST

     iniset $HEAT_ENGINE_CONF DEFAULT bind_port $HEAT_ENGINE_PORT

-    iniset $HEAT_ENGINE_CONF DEFAULT sql_connection $BASE_SQL_CONN/heat?charset=utf8

+    local dburl

+    database_connection_url dburl heat

+    iniset $HEAT_ENGINE_CONF DEFAULT sql_connection $dburl

     iniset $HEAT_ENGINE_CONF DEFAULT auth_encryption_key `hexdump -n 16 -v -e '/1 "%02x"' /dev/random`

     if is_service_enabled rabbit; then

@@ -185,8 +187,7 @@ function configure_heat() {

 function init_heat() {

     # (re)create heat database

-    mysql -u$MYSQL_USER -p$MYSQL_PASSWORD -e 'DROP DATABASE IF EXISTS heat;'

-    mysql -u$MYSQL_USER -p$MYSQL_PASSWORD -e 'CREATE DATABASE heat CHARACTER SET utf8;'

+    recreate_database heat utf8

     $HEAT_DIR/bin/heat-db-setup $os_PACKAGE -r $MYSQL_PASSWORD

     $HEAT_DIR/tools/nova_create_flavors.sh

@@ -82,9 +82,11 @@ function configure_keystone() {

     fi

     # Rewrite stock ``keystone.conf``

+    local dburl

+    database_connection_url dburl keystone

     iniset $KEYSTONE_CONF DEFAULT admin_token "$SERVICE_TOKEN"

     iniset $KEYSTONE_CONF signing token_format "$KEYSTONE_TOKEN_FORMAT"

-    iniset $KEYSTONE_CONF sql connection "$BASE_SQL_CONN/keystone?charset=utf8"

+    iniset $KEYSTONE_CONF sql connection $dburl

     iniset $KEYSTONE_CONF ec2 driver "keystone.contrib.ec2.backends.sql.Ec2"

     sed -e "

         /^pipeline.*ec2_extension crud_/s|ec2_extension crud_extension|ec2_extension s3_extension crud_extension|;

@@ -141,8 +143,7 @@ function configure_keystone() {

 # init_keystone() - Initialize databases, etc.

 function init_keystone() {

     # (Re)create keystone database

-    mysql -u$MYSQL_USER -p$MYSQL_PASSWORD -e 'DROP DATABASE IF EXISTS keystone;'

-    mysql -u$MYSQL_USER -p$MYSQL_PASSWORD -e 'CREATE DATABASE keystone CHARACTER SET utf8;'

+    recreate_database keystone utf8

     # Initialize keystone database

     $KEYSTONE_DIR/bin/keystone-manage db_sync

@@ -296,7 +296,9 @@ function create_nova_conf() {

     add_nova_opt "s3_port=$S3_SERVICE_PORT"

     add_nova_opt "osapi_compute_extension=nova.api.openstack.compute.contrib.standard_extensions"

     add_nova_opt "my_ip=$HOST_IP"

-    add_nova_opt "sql_connection=$BASE_SQL_CONN/nova?charset=utf8"

+    local dburl

+    database_connection_url dburl nova

+    add_nova_opt "sql_connection=$dburl"

     add_nova_opt "libvirt_type=$LIBVIRT_TYPE"

     add_nova_opt "libvirt_cpu_mode=none"

     add_nova_opt "instance_name_template=${INSTANCE_NAME_PREFIX}%08x"

@@ -372,14 +374,12 @@ function init_nova() {

     # All nova components talk to a central database.  We will need to do this step

     # only once for an entire cluster.

-    if is_service_enabled mysql && is_service_enabled nova; then

+    if is_service_enabled $DATABASE_BACKENDS && is_service_enabled nova; then

         # (Re)create nova database

-        mysql -u$MYSQL_USER -p$MYSQL_PASSWORD -e 'DROP DATABASE IF EXISTS nova;'

-

         # Explicitly use latin1: to avoid lp#829209, nova expects the database to

         # use latin1 by default, and then upgrades the database to utf8 (see the

         # 082_essex.py in nova)

-        mysql -u$MYSQL_USER -p$MYSQL_PASSWORD -e 'CREATE DATABASE nova CHARACTER SET latin1;'

+        recreate_database nova latin1

         # (Re)create nova database

         $NOVA_BIN_DIR/nova-manage db sync

@@ -30,6 +30,8 @@ source $TOP_DIR/functions

 # and ``DISTRO``

 GetDistro

+# Import database library (must be loaded before stackrc which sources localrc)

+source $TOP_DIR/lib/database

 # Settings

 # ========

@@ -37,15 +39,15 @@ GetDistro

 # ``stack.sh`` is customizable through setting environment variables.  If you

 # want to override a setting you can set and export it::

 #

-#     export MYSQL_PASSWORD=anothersecret

+#     export DATABASE_PASSWORD=anothersecret

 #     ./stack.sh

 #

-# You can also pass options on a single line ``MYSQL_PASSWORD=simple ./stack.sh``

+# You can also pass options on a single line ``DATABASE_PASSWORD=simple ./stack.sh``

 #

 # Additionally, you can put any local variables into a ``localrc`` file::

 #

-#     MYSQL_PASSWORD=anothersecret

-#     MYSQL_USER=hellaroot

+#     DATABASE_PASSWORD=anothersecret

+#     DATABASE_USER=hellaroot

 #

 # We try to have sensible defaults, so you should be able to run ``./stack.sh``

 # in most cases.  ``localrc`` is not distributed with DevStack and will never

@@ -471,23 +473,20 @@ FLAT_INTERFACE=${FLAT_INTERFACE-$GUEST_INTERFACE_DEFAULT}

 # With Quantum networking the NET_MAN variable is ignored.

-# MySQL & (RabbitMQ or Qpid)

-# --------------------------

-

-# We configure Nova, Horizon, Glance and Keystone to use MySQL as their

-# database server.  While they share a single server, each has their own

-# database and tables.

+# Database configuration

+# ----------------------

+# To select between database backends, add a line to localrc like:

+#

+#  use_database postgresql

+#

+# The available database backends are defined in the DATABASE_BACKENDS

+# variable defined in stackrc. By default, MySQL is enabled as the database

+# backend.

-# By default this script will install and configure MySQL.  If you want to

-# use an existing server, you can pass in the user/password/host parameters.

-# You will need to send the same ``MYSQL_PASSWORD`` to every host if you are doing

-# a multi-node DevStack installation.

-MYSQL_HOST=${MYSQL_HOST:-localhost}

-MYSQL_USER=${MYSQL_USER:-root}

-read_password MYSQL_PASSWORD "ENTER A PASSWORD TO USE FOR MYSQL."

+initialize_database_backends && echo "Using $DATABASE_TYPE database backend" || echo "No database enabled"

-# NOTE: Don't specify ``/db`` in this string so we can use it for multiple services

-BASE_SQL_CONN=${BASE_SQL_CONN:-mysql://$MYSQL_USER:$MYSQL_PASSWORD@$MYSQL_HOST}

+# RabbitMQ or Qpid

+# --------------------------

 # Rabbit connection info

 if is_service_enabled rabbit; then

@@ -746,32 +745,8 @@ elif is_service_enabled zeromq; then

     fi

 fi

-if is_service_enabled mysql; then

-

-    if [[ "$os_PACKAGE" = "deb" ]]; then

-        # Seed configuration with mysql password so that apt-get install doesn't

-        # prompt us for a password upon install.

-        cat <<MYSQL_PRESEED | sudo debconf-set-selections

-mysql-server-5.1 mysql-server/root_password password $MYSQL_PASSWORD

-mysql-server-5.1 mysql-server/root_password_again password $MYSQL_PASSWORD

-mysql-server-5.1 mysql-server/start_on_boot boolean true

-MYSQL_PRESEED

-    fi

-

-    # while ``.my.cnf`` is not needed for OpenStack to function, it is useful

-    # as it allows you to access the mysql databases via ``mysql nova`` instead

-    # of having to specify the username/password each time.

-    if [[ ! -e $HOME/.my.cnf ]]; then

-        cat <<EOF >$HOME/.my.cnf

-[client]

-user=$MYSQL_USER

-password=$MYSQL_PASSWORD

-host=$MYSQL_HOST

-EOF

-        chmod 0600 $HOME/.my.cnf

-    fi

-    # Install mysql-server

-    install_package mysql-server

+if is_service_enabled $DATABASE_BACKENDS; then

+    install_database

 fi

 if is_service_enabled horizon; then

@@ -993,46 +968,10 @@ elif is_service_enabled qpid; then

 fi

-# Mysql

-# -----

-

-if is_service_enabled mysql; then

-    echo_summary "Configuring and starting MySQL"

-

-    if [[ "$os_PACKAGE" = "deb" ]]; then

-        MY_CONF=/etc/mysql/my.cnf

-        MYSQL=mysql

-    else

-        MY_CONF=/etc/my.cnf

-        MYSQL=mysqld

-    fi

-

-    # Start mysql-server

-    if [[ "$os_PACKAGE" = "rpm" ]]; then

-        # RPM doesn't start the service

-        start_service $MYSQL

-        # Set the root password - only works the first time

-        sudo mysqladmin -u root password $MYSQL_PASSWORD || true

-    fi

-    # Update the DB to give user ‘$MYSQL_USER’@’%’ full control of the all databases:

-    sudo mysql -uroot -p$MYSQL_PASSWORD -h127.0.0.1 -e "GRANT ALL PRIVILEGES ON *.* TO '$MYSQL_USER'@'%' identified by '$MYSQL_PASSWORD';"

-

-    # Now update ``my.cnf`` for some local needs and restart the mysql service

-

-    # Change ‘bind-address’ from localhost (127.0.0.1) to any (0.0.0.0)

-    sudo sed -i '/^bind-address/s/127.0.0.1/0.0.0.0/g' $MY_CONF

-

-    # Set default db type to InnoDB

-    if sudo grep -q "default-storage-engine" $MY_CONF; then

-        # Change it

-        sudo bash -c "source $TOP_DIR/functions; iniset $MY_CONF mysqld default-storage-engine InnoDB"

-    else

-        # Add it

-        sudo sed -i -e "/^\[mysqld\]/ a \

-default-storage-engine = InnoDB" $MY_CONF

-    fi

-

-    restart_service $MYSQL

+# Configure database

+# ------------------

+if is_service_enabled $DATABASE_BACKENDS; then

+    configure_database

 fi

 if [ -z "$SCREEN_HARDSTATUS" ]; then

@@ -1283,7 +1222,9 @@ if is_service_enabled quantum; then

     Q_PLUGIN_CONF_FILE=$Q_PLUGIN_CONF_PATH/$Q_PLUGIN_CONF_FILENAME

     cp $QUANTUM_DIR/$Q_PLUGIN_CONF_FILE /$Q_PLUGIN_CONF_FILE

-    iniset /$Q_PLUGIN_CONF_FILE DATABASE sql_connection mysql:\/\/$MYSQL_USER:$MYSQL_PASSWORD@$MYSQL_HOST\/$Q_DB_NAME?charset=utf8

+    database_connection_url dburl $Q_DB_NAME

+    iniset /$Q_PLUGIN_CONF_FILE DATABASE sql_connection $dburl

+    unset dburl

     Q_CONF_FILE=/etc/quantum/quantum.conf

     cp $QUANTUM_DIR/etc/quantum.conf $Q_CONF_FILE

@@ -1309,12 +1250,11 @@ if is_service_enabled q-svc; then

     cp $QUANTUM_DIR/etc/api-paste.ini $Q_API_PASTE_FILE

     cp $QUANTUM_DIR/etc/policy.json $Q_POLICY_FILE

-    if is_service_enabled mysql; then

-            mysql -u$MYSQL_USER -p$MYSQL_PASSWORD -e "DROP DATABASE IF EXISTS $Q_DB_NAME;"

-            mysql -u$MYSQL_USER -p$MYSQL_PASSWORD -e "CREATE DATABASE IF NOT EXISTS $Q_DB_NAME CHARACTER SET utf8;"

-        else

-            echo "mysql must be enabled in order to use the $Q_PLUGIN Quantum plugin."

-            exit 1

+    if is_service_enabled $DATABASE_BACKENDS; then

+        recreate_database $Q_DB_NAME utf8

+    else

+        echo "A database must be enabled in order to use the $Q_PLUGIN Quantum plugin."

+        exit 1

     fi

     # Update either configuration file with plugin

@@ -1974,7 +1914,7 @@ if is_service_enabled q-svc; then

         fi

    fi

-elif is_service_enabled mysql && is_service_enabled nova; then

+elif is_service_enabled $DATABASE_BACKENDS && is_service_enabled nova; then

     # Create a small network

     $NOVA_BIN_DIR/nova-manage network create "$PRIVATE_NETWORK_NAME" $FIXED_RANGE 1 $FIXED_NETWORK_SIZE $NETWORK_CREATE_ARGS

@@ -15,6 +15,9 @@ TOP_DIR=$(cd $(dirname "$0") && pwd)

 # Import common functions

 source $TOP_DIR/functions

+# Import database library

+source $TOP_DIR/lib/database

+

 # Load local configuration

 source $TOP_DIR/stackrc

@@ -102,6 +105,10 @@ if [[ -n "$UNSTACK_ALL" ]]; then

         stop_service mysql

     fi

+    if is_service_enabled postgresql; then

+        stop_service postgresql

+    fi

+

     # Stop rabbitmq-server

     if is_service_enabled rabbit; then

         stop_service rabbitmq-server