Puppet users - Feb 2011 - Make puppet clients look at a domain name rather than an IP?

In the docs it says one must add a line to the /etc/hosts file with
the name "puppet" and the IP of the puppet master. This isn''t
a
possibility for us as the IP is subject to change. Is it possible to
configure the puppet clients to look for a specific domain to find the
master? eg. "puppetmaster.mydomain.com"? If so, how/where can this be
configured?

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>
>In the docs it says one must add a line to the /etc/hosts file with
>the name "puppet" and the IP of the puppet master. This
isn''t a
>possibility for us as the IP is subject to change. Is it possible to
>configure the puppet clients to look for a specific domain to find the
>master? eg. "puppetmaster.mydomain.com"? If so, how/where can this
be
>configured?
In your clients /etc/puppet/puppet.conf

[agent]
	server = puppet.foo.com

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On Wed, Feb 16, 2011 at 6:37 AM, Phillip B Oldham
<phillip.oldham@gmail.com> wrote:
> In the docs it says one must add a line to the /etc/hosts file with
> the name "puppet" and the IP of the puppet master. This
isn''t a
> possibility for us as the IP is subject to change. Is it possible to
> configure the puppet clients to look for a specific domain to find the
> master? eg. "puppetmaster.mydomain.com"? If so, how/where can
this be
> configured?
Where does it say this Phillip? We must have some unclear documentation.

Puppet nodes normally find their master by name resolution, and in the
vast majority of cases this is a DNS entry.

You can configure this on the node with the "server" configuration
parameter in puppet.conf

The documentation around an /etc/hosts entry should be targeted at
people who for whatever reason cannot use DNS.
>
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On Feb 16, 2011, at 6:37 AM, Phillip B Oldham wrote:
> In the docs it says one must add a line to the /etc/hosts file with
> the name "puppet" and the IP of the puppet master. This
isn''t a
> possibility for us as the IP is subject to change. Is it possible to
> configure the puppet clients to look for a specific domain to find the
> master? eg. "puppetmaster.mydomain.com"? If so, how/where can
this be
> configured?
Other people already answered you question directly but, if you control and host
your DNS, an even better option would be to add a CNAME from puppet.mydomain.com
to puppetmaster.mydomain.com.  Then you can just change the CNAME any time you
chance which computer is the puppetmaster.  If you can''t do that, can
you change the hostname of the server to puppet.mydomain.com?

The CNAME option it probably the right way to do it if you can affect DNS. 
(Note: I''m also assuming that mydomain.com is in your search domain
list.  This will only work if "ping puppet" pings the puppet master)

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On Feb 16, 2:40 pm, Nigel Kersten <ni...@puppetlabs.com>
wrote:
> Where does it say this Phillip? We must have some unclear documentation.
http://docs.puppetlabs.com/guides/configuring.html#configure-dns-optional

It is quite confusing... I struggled for a moment getting a puppet-
master daemon running, too - the configuration documentation could
maybe do with a little more work for those not used to the ruby
environment or usual set-up of ruby daemons. The following paragraph
threw me (from
http://docs.puppetlabs.com/guides/configuring.html#start-the-central-daemon):
> If you’re running on Red Hat, CentOS, Fedora, Debian, Ubuntu, or Solaris,
the OS package already contains a suitable init script. If you don’t have one,
you can either create your own using an existing init script as an example, or
simply run without one (though this is not advisable for production
environments).
... sounds fine, however there''s no example of how to actually run the
puppet master directly on the command-line (I''d installed via a ruby
gem).

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