.. _i-ns: Synnefo ------- :ref:`synnefo ` || ns || :ref:`apt ` || :ref:`mq ` || :ref:`db ` || :ref:`gunicorn ` || :ref:`apache ` || :ref:`webproject ` || :ref:`astakos ` || :ref:`cms ` || :ref:`pithos ` || :ref:`cyclades ` || :ref:`kamaki ` || :ref:`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: .. code-block:: console # apt-get install bind9 In `/etc/bind/zones/example.com` add: .. code-block:: console $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: .. code-block:: console $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: .. code-block:: console 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: .. code-block:: console # /etc/init.d/bind9 restart In all ``synnefo`` and ``backend`` nodes add in `/etc/resolv.conf`: .. code-block:: console domain example.com search example.com nameserver 4.3.2.1 Test your Setup: ++++++++++++++++ Try to ping all FQDNs.