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.. _i-ns:
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Synnefo
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-------
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:ref:`synnefo <i-synnefo>` ||
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ns ||
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:ref:`apt <i-apt>` ||
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:ref:`mq <i-mq>` ||
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:ref:`db <i-db>` ||
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:ref:`gunicorn <i-gunicorn>` ||
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:ref:`apache <i-apache>` ||
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:ref:`webproject <i-webproject>` ||
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:ref:`astakos <i-astakos>` ||
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:ref:`cms <i-cms>` ||
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:ref:`pithos <i-pithos>` ||
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:ref:`cyclades <i-cyclades>` ||
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:ref:`kamaki <i-kamaki>` ||
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:ref:`backends <i-backends>`
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Name Server Setup
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+++++++++++++++++
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The following applies to ``ns`` node. You will  create  an DNS to resolve all
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FQDNs used by both ``synnefo`` and ``backend`` nodes. All we need here is to have
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a physical node - ip - role mapping.
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Assumptions:
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~~~~~~~~~~~~
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 - domain to use:  ``example.com``
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 - nodes' IPv4 subnet: ``4.3.2.0/24``
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For the sake of simplicity we assume we have 6 nodes assinged the following roles:
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========  =========  ========================   ====================
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hostname  IP         roles                      FQDN
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========  =========  ========================   ====================
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node1     4.3.2.1    ns,router,client,astakos   accounts.example.com
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node2     4.3.2.2    cyclades                   cyclades.example.com
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node3     4.3.2.3    pithos                     pithos.example.com
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node4     4.3.2.4    cms                        cms.example.com
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node5     4.3.2.5    db                         db.example.com
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node6     4.3.2.6    mq                         mq.example.com
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node1     4.3.2.100  master                     ganeti.example.com
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========  =========  ========================   ====================
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First install the corresponding package:
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.. code-block:: console
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   # apt-get install bind9
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In `/etc/bind/zones/example.com` add:
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.. code-block:: console
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    $TTL 14400
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    $origin example.com.
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    @               IN      SOA     ns.example.com. admin.example.com. (
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    2012111903; the Serial Number
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    172800; the Refresh Rate
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    7200;  the Retry Time
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    604800; the Expiration Time
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    3600; the Minimum Time
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    )
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    @               IN        NS      ns.example.com.
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    @               IN        A       4.3.2.1
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    ns              IN        A       4.3.2.1
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    localhost       IN        A       127.0.0.1
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    example.com.    IN        MX      10 example.com.
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    mail            IN        CNAME   example.com.
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    www             IN        CNAME   example.com.
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    accounts        IN        CNAME   node1.example.com.
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    cyclades        IN        CNAME   node2.example.com.
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    pithos          IN        CNAME   node3.example.com.
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    cms             IN        CNAME   node4.example.com.
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    db              IN        CNAME   node5.example.com.
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    mq              IN        CNAME   node6.example.com.
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    node1           IN        A       4.3.2.1
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    node2           IN        A       4.3.2.2
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    node3           IN        A       4.3.2.3
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    node4           IN        A       4.3.2.4
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    node5           IN        A       4.3.2.5
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    node6           IN        A       4.3.2.6
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    ganeti          IN        A       4.3.2.100
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In `/etc/bind/rev/0-24.2.3.4.in-addr.arpa.zone` add:
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.. code-block:: console
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    $TTL 86400
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    $ORIGIN 0-24.2.3.4.in-addr.arpa.
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    @               IN      SOA     ns.example.com. admin.skata.com. (
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    2012070900; the Serial Number
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    172800; the Refresh Rate
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    7200;  the Retry Time
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    604800; the Expiration Time
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    3600 ; the Minimum Time
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    )
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    @               IN        NS      ns.example.com.
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    1               IN        PTR     node1.example.com.
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    2               IN        PTR     node2.example.com.
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    3               IN        PTR     node3.example.com.
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    4               IN        PTR     node4.example.com.
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    5               IN        PTR     node5.example.com.
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    6               IN        PTR     node6.example.com.
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In `/etc/bind/named.conf.local` add:
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.. code-block:: console
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    zone "example.com" in {
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            type master;
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            file "/etc/bind/zones/example.com";
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    };
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    zone "0-24.2.3.4.in-addr.arpa" in {
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            type master;
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            file "/etc/bind/rev/0-24.2.3.4.in-addr.arpa.zone";
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    };
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And then restart the service:
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.. code-block:: console
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    # /etc/init.d/bind9 restart
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In all ``synnefo`` and ``backend`` nodes add in `/etc/resolv.conf`:
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.. code-block:: console
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    domain example.com
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    search example.com
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    nameserver 4.3.2.1
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Test your Setup:
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++++++++++++++++