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Quickstart

Environment

Quick installation of nova-dns with:

  • use PowerDNS as DNS backend (with nova_dns.dnsmanager.powerdns.Manager dns_manager)
  • use MySQL database as storage for PowerDNS
  • use nova_dns.listener.simple.Listener as AMQP listener

Installation

yum install nova-dns

Note

installation from epel repository

yum install pdns pdns-backend-mysql

Configuration

Create database

export DBNAME="pdns"
export DBUSER="pdns"
export DBPASS="pdns"
export DBROOTPASS="nova"
echo "create database $DBNAME; grant all on $DBNAME.* " \
       " to $DBUSER@localhost identified by '$DBPASS'" \
  | mysql -u root -p"$DBROOTPASS"

Configure PowerDNS

Choose local ip addresses to bind, comma separated:

Warning

if you run nova-dns on same server with nova-compute, there are already started one or several dnsmasq on 53 port on local interfaces

export LOCALIP="127.0.0.1"
echo "launch=gmysql
gmysql-host=127.0.0.1
gmysql-dbname=$DBNAME
gmysql-user=$DBUSER
gmysql-password=$DBPASS
local-address=$LOCALIP" > /etc/pdns/pdns.conf

Start the server and add it to autostart:

service pdns start
chkconfig pdns on

Warning

quick setup of slave PowerDNS

Configure nova-dns

locate nova.conf (usually in /etc/nova/nova.conf):

export NOVA=/etc/nova/nova.conf

add credentials for SQL connection:

echo "--dns_sql_connection=mysql://$DBUSER:$DBPASS@localhost/$DBNAME" >> $NOVA

setup defaults for SOA:

echo "--dns_default_ttl=7200
--dns_soa_primary=ns1@my_host.com
--dns_soa_email=hostmaster@my_host.com" >> $NOVA

setup zone for fixed_ip records:

echo "--dns_zone=cloud.my_host.com" >> $NOVA

setup ns servers:

LOCALDNS=`perl -e '$ns=1; print join(",", map {sprintf "ns%d:%s", $ns++, $_} split /\s*,\s*/,$ARGV[0])' "$LOCALIP"
echo "--dns_ns=$LOCALDNS" >> $NOVA

add service in keystone

keystone-manage service add nova_dns nova_dns "DNS for OpenStack"
keystone-manage endpointTemplates add RegionOne nova_dns http://$LOCALIP:15353 http://$LOCALIP:15353 http://$LOCALIP:15353 1 1

start service:

service nova-dns start