DNS Infrastructure SOP

We have two DNS server, the primary is at ns1.fedoraproject.org and is hosted at ServerBeach, from there it replicates to dns1.j2solutions.net.

Contact Information

Owner: Fedora Infrastructure Team

Contact: #fedora-admin, sysadmin-main

Location: ServerBeach and ibiblio

Servers: ns1.fedoraproject.org, ns2.fedorparoject.org

Purpose: Provides DNS to our users

Troubleshooting, Resolution and Maintenance

DNS update

DNS config files are puppet managed on puppet1. The update is standard to the puppet configs at http://fedoraproject.org/wiki/Infrastructure/Puppet/QuickStart

From puppet1:

git clone /git/puppet
cd puppet/modules/bind/files/master
vi fedoraproject.org # Don't forget to increment the serial!
cd ../..
git commit -m "What you did"
git push

It should update within a half hour. You can test the new configs with dig:

dig @ns1.fedoraproject.org fedoraproject.org
dig @ns2.fedorpaorject.org cvs.fedoraproject.org

Adding a new zone

First name the zone and generate new set of keys for it. Run this on ns1. Note it could take SEVERAL minutes to run:

/usr/sbin/dnssec-keygen -a RSASHA1 -b 1024 -n ZONE c.fedoraproject.org ; /usr/sbin/dnssec-keygen -a RSASHA1 -b 2048 -n ZONE -f KSK c.fedoraproject.org

Then copy the created .key and .private files to the private git repo (You need to be sysadmin-main to do this). The directory is private/private/dnssec.

Once that is done you can add the new zone to the puppet/modules/bind/files/master/ directory. Then add the new zone to puppet/modules/bind/files/zones.conf. Note: If you're adding a new geodns zone, you need to do that directly in the named.conf file, not zones.conf.

The last thing you need to do is make sure to put the .key file contents at the bottom of your zone file. See other zone files for an example. The .key file you generated earlier.

resolv.conf

In order to make the network more transparent to the admins we do a lot of search based relative names. Below is a list of what a resolv.conf should look like.

Any machine that is not on our vpn or has not yet joined the vpn should _NOT_ have the vpn.fedoraproject.org search until after it has been added to the vpn (if it ever does)

Phoenix

search fedora.phx.redhat.com vpn.fedoraproject.org fedoraproject.org

Non-Phoenix

search vpn.fedoraproject.org fedoraproject.org

The idea here is that we can, when need be, setup local domains to contact instead of having to go over the VPN directly but still have sane configs. For example if we tell the proxy server to hit "app1" and that box is in PHX, it will go directly to app1, if its not, it will go over the vpn to app1.