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#!/bin/sh

# Copyright (C) 2014-2015  Codethink Limited
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program.  If not, see <http://www.gnu.org/licenses/>.

set -e

ROOT="$1"

enable(){
    ln -sf "/usr/lib/systemd/system/openstack-nova-$1.service" \
            "$ROOT/etc/systemd/system/multi-user.target.wants/openstack-nova-$1.service"
}

##########################################################################
# Check variables
##########################################################################


if [ -z "$NOVA_SERVICE_USER" -a \
     -z "$NOVA_SERVICE_PASSWORD" -a \
     -z "$NOVA_DB_USER" -a \
     -z "$NOVA_DB_PASSWORD" -a \
     -z "$NOVA_VIRT_TYPE" -a \
     -z "$NEUTRON_SERVICE_USER" -a \
     -z "$NEUTRON_SERVICE_PASSWORD" -a \
     -z "$METADATA_PROXY_SHARED_SECRET" -a \
     -z "$RABBITMQ_HOST" -a \
     -z "$RABBITMQ_USER" -a \
     -z "$RABBITMQ_PASSWORD" -a \
     -z "$RABBITMQ_PORT" -a \
     -z "$CONTROLLER_HOST_ADDRESS" -a \
     -z "$MANAGEMENT_INTERFACE_IP_ADDRESS" -a \
     -z "$KEYSTONE_TEMPORARY_ADMIN_TOKEN" ]; then
     # No NOVA options defined, do nothing.
     exit 0
fi

if [ -z "$NOVA_SERVICE_USER" -o \
     -z "$NOVA_SERVICE_PASSWORD" -o \
     -z "$NOVA_DB_USER" -o \
     -z "$NOVA_DB_PASSWORD" -o \
     -z "$NOVA_VIRT_TYPE" -o \
     -z "$NEUTRON_SERVICE_USER" -o \
     -z "$NEUTRON_SERVICE_PASSWORD" -o \
     -z "$METADATA_PROXY_SHARED_SECRET" -o \
     -z "$RABBITMQ_HOST" -o \
     -z "$RABBITMQ_USER" -o \
     -z "$RABBITMQ_PASSWORD" -o \
     -z "$RABBITMQ_PORT" -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.
    exit 1
fi

# Check optional variables

unnaceptable(){
    eval echo Unexpected value \$$1 for $1 >&2
    exit 1
}

check_bool(){
    case "$(eval echo \"\$$1\")" in
    True|'')
        eval "$1=true"
        ;;
    False)
        eval "$1=false"
        ;;
    *)
        unnaceptable "$1"
        ;;
    esac
}

check_bool NOVA_ENABLE_CONTROLLER
check_bool NOVA_ENABLE_COMPUTE

###############################################
# Enable libvirtd and libvirt-guests services #
###############################################

wants_dir="$ROOT"/usr/lib/systemd/system/multi-user.target.wants
mkdir -p "$wants_dir"
mkdir -p "$ROOT"/var/lock/subsys
ln -sf ../libvirtd.service "$wants_dir/libvirtd.service"

######################################
# Enable relevant openstack services #
######################################

if "$NOVA_ENABLE_CONTROLLER" || "$NOVA_ENABLE_COMPUTE"; then
    enable config-setup
fi
if "$NOVA_ENABLE_CONTROLLER" && ! "$NOVA_ENABLE_COMPUTE"; then
    enable conductor
fi
if "$NOVA_ENABLE_COMPUTE"; then
    enable compute
fi
if "$NOVA_ENABLE_CONTROLLER"; then
    for service in db-setup api cert consoleauth novncproxy scheduler serialproxy; do
            enable "$service"
    done
fi

##########################################################################
# Change iprange for the interal libvirt to avoid clashes
# with eth0 ip range
##########################################################################

sed -i "s/192\.168\.122\./192\.168\.1\./g" \
       "$ROOT"/etc/libvirt/qemu/networks/default.xml


##########################################################################
# Generate configuration file
##########################################################################

OPENSTACK_DATA="$ROOT/etc/openstack"
mkdir -p "$OPENSTACK_DATA"

python <<'EOF' >"$OPENSTACK_DATA/nova.conf"
import os, sys, yaml

nova_configuration={
    'NOVA_SERVICE_USER': os.environ['NOVA_SERVICE_USER'],
    'NOVA_SERVICE_PASSWORD': os.environ['NOVA_SERVICE_PASSWORD'],
    'NOVA_DB_USER': os.environ['NOVA_DB_USER'],
    'NOVA_DB_PASSWORD': os.environ['NOVA_DB_PASSWORD'],
    'NOVA_VIRT_TYPE': os.environ['NOVA_VIRT_TYPE'],
    'NEUTRON_SERVICE_USER': os.environ['NEUTRON_SERVICE_USER'],
    'NEUTRON_SERVICE_PASSWORD': os.environ['NEUTRON_SERVICE_PASSWORD'],
    'METADATA_PROXY_SHARED_SECRET': os.environ['METADATA_PROXY_SHARED_SECRET'],
    'RABBITMQ_HOST': os.environ['RABBITMQ_HOST'],
    'RABBITMQ_USER': os.environ['RABBITMQ_USER'],
    'RABBITMQ_PASSWORD': os.environ['RABBITMQ_PASSWORD'],
    'RABBITMQ_PORT': os.environ['RABBITMQ_PORT'],
    'CONTROLLER_HOST_ADDRESS': os.environ['CONTROLLER_HOST_ADDRESS'],
    'MANAGEMENT_INTERFACE_IP_ADDRESS': os.environ['MANAGEMENT_INTERFACE_IP_ADDRESS'],
    'KEYSTONE_TEMPORARY_ADMIN_TOKEN': os.environ['KEYSTONE_TEMPORARY_ADMIN_TOKEN'],
}

yaml.dump(nova_configuration, sys.stdout, default_flow_style=False)
EOF