Synnefo

synnefo || ns || apt || mq || db || gunicorn || apache || webproject || astakos || cms || pithos || cyclades || kamaki || backends

Name Server Setup

The following applies to ns node. You will create an DNS to resolve all FQDNs used by both synnefo and backend nodes. All we need here is to have a physical node - ip - role mapping.

Assumptions:

• domain to use: example.com
• nodes’ IPv4 subnet: 4.3.2.0/24

For the sake of simplicity we assume we have 6 nodes assinged the following roles:

hostname	IP	roles	FQDN
node1	4.3.2.1	ns,router,client,astakos,qh	accounts.example.com
node2	4.3.2.2	cyclades	cyclades.example.com
node3	4.3.2.3	pithos	pithos.example.com
node4	4.3.2.4	cms	cms.example.com
node5	4.3.2.5	db	db.example.com
node6	4.3.2.6	mq	mq.example.com
node1	4.3.2.100	master	ganeti.example.com

First install the corresponding package:

# apt-get install bind9

In /etc/bind/zones/example.com add:

$TTL 14400
$origin example.com.
@               IN      SOA     ns.example.com. admin.example.com. (
2012111903; the Serial Number
172800; the Refresh Rate
7200;  the Retry Time
604800; the Expiration Time
3600; the Minimum Time
)

@               IN        NS      ns.example.com.
@               IN        A       4.3.2.1
ns              IN        A       4.3.2.1

localhost       IN        A       127.0.0.1
example.com.    IN        MX      10 example.com.

mail            IN        CNAME   example.com.
www             IN        CNAME   example.com.
accounts        IN        CNAME   node1.example.com.
cyclades        IN        CNAME   node2.example.com.
pithos          IN        CNAME   node3.example.com.
cms             IN        CNAME   node4.example.com.
db              IN        CNAME   node5.example.com.
mq              IN        CNAME   node6.example.com.
qh              IN        CNAME   node1.example.com.

node1           IN        A       4.3.2.1
node2           IN        A       4.3.2.2
node3           IN        A       4.3.2.3
node4           IN        A       4.3.2.4
node5           IN        A       4.3.2.5
node6           IN        A       4.3.2.6

ganeti          IN        A       4.3.2.100

In /etc/bind/rev/0-24.2.3.4.in-addr.arpa.zone add:

$TTL 86400
$ORIGIN 2.3.4.in-addr.arpa.
@               IN      SOA     ns.example.com. admin.skata.com. (
2012070900; the Serial Number
172800; the Refresh Rate
7200;  the Retry Time
604800; the Expiration Time
3600 ; the Minimum Time
)
@               IN        NS      ns.example.com.

1               IN        PTR     node1.example.com.
2               IN        PTR     node2.example.com.
3               IN        PTR     node3.example.com.
4               IN        PTR     node4.example.com.
5               IN        PTR     node5.example.com.
6               IN        PTR     node6.example.com.

In /etc/bind/named.conf.local add:

zone "example.com" in {
        type master;
        file "/etc/bind/zones/example.com";
};

zone "0-24.2.3.4.in-addr.arpa" in {
        type master;
        file "/etc/bind/rev/0-24.2.3.4.in-addr.arpa.zone";
};

And then restart the service:

# /etc/init.d/bind9 restart

In all synnefo and backend nodes add in /etc/resolv.conf:

domain example.com
search example.com
nameserver 4.3.2.1

Test your Setup:

Try to ping all FQDNs.