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#!/bin/sh

# Copyright (C) 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

set -e

ROOT="$1"

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

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 variables
##########################################################################

check_bool IRONIC_ENABLE_SERVICE

if ! "$IRONIC_ENABLE_SERVICE"; then
    exit 0
fi

if [ -z "$IRONIC_SERVICE_USER" -o \
     -z "$IRONIC_SERVICE_PASSWORD" -o \
     -z "$IRONIC_DB_USER" -o \
     -z "$IRONIC_DB_PASSWORD" -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 Ironic were defined, but not all.
    exit 1
fi

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

enable openstack-ironic-setup
enable iscsi-setup
enable target #target.service!
enable iscsid

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

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

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

ironic_configuration={
    'IRONIC_SERVICE_USER': os.environ['IRONIC_SERVICE_USER'],
    'IRONIC_SERVICE_PASSWORD': os.environ['IRONIC_SERVICE_PASSWORD'],
    'IRONIC_DB_USER': os.environ['IRONIC_DB_USER'],
    'IRONIC_DB_PASSWORD': os.environ['IRONIC_DB_PASSWORD'],
    'RABBITMQ_HOST':os.environ['RABBITMQ_HOST'],
    'RABBITMQ_PORT':os.environ['RABBITMQ_PORT'],
    'RABBITMQ_USER':os.environ['RABBITMQ_USER'],
    'RABBITMQ_PASSWORD':os.environ['RABBITMQ_PASSWORD'],
    '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(ironic_configuration, sys.stdout, default_flow_style=False)
EOF

##########################################################################
# Configure the TFTP service                                             #
##########################################################################

tftp_root="/srv/tftp_root/" # trailing slash is essential
mkdir -p "$ROOT/$tftp_root"

install -D /dev/stdin -m 644 "$ROOT/usr/lib/systemd/system/tftp-hpa.service" << 'EOF'
[Unit]
Description=tftp service for booting kernels
After=network-online.target
Wants=network-online.target

[Service]
Type=simple
EnvironmentFile=/etc/tftp-hpa.conf
ExecStart=/usr/sbin/in.tftpd $TFTP_OPTIONS ${TFTP_ROOT}
StandardInput=socket
StandardOutput=inherit
StandardError=journal

[Install]
WantedBy=multi-user.target
EOF

install -D /dev/stdin -m 644 "$ROOT/usr/lib/systemd/system/tftp-hpa.socket" << EOF
[Unit]
Description=Tftp server activation socket

[Socket]
ListenDatagram=$MANAGEMENT_INTERFACE_IP_ADDRESS:69
FreeBind=yes

[Install]
WantedBy=sockets.target
EOF

install -D -m 644 /dev/stdin "$ROOT"/etc/tftp-hpa.conf << EOF
TFTP_ROOT=$tftp_root
TFTP_OPTIONS="-v -v -v -v -v --map-file $tftp_root/map-file"
EOF

install -D /dev/stdin -m 644 "$ROOT/$tftp_root"/map-file << EOF
r ^([^/]) $tftp_root\1
r ^/tftpboot/ $tftp_root\2
EOF

cp "$ROOT"/usr/share/syslinux/pxelinux.0 "$ROOT/$tftp_root"