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---
inMenu: true
title: Test-driving Puppet
orderInfo: 20
---
If you want to just test-drive Puppet, making the least commitment possible,
you can run it directly from the checked-out [source][], against a configuration
in a temporary directory.
The default Puppet configuration directory (where it looks for its manifests,
and where it stores certificates and logs) is ``/etc/puppet`` if you are
running the executables as root or ``~/.puppet`` otherwise. All of the
executables accept a ``--confdir <directory>`` flag to change this directory.
I often use my local Subversion sandbox for testing (i.e., I have my Puppet
configuration stored in Subversion and checked out in my home directory, and I
just test Puppet directly against this configuration). Normally Puppet would
make the configuration directory for you, but the server needs the ``site.pp``
to exist, so you need to create the ``manifests`` subdirectory:
$ mkdir -p /var/tmp/puppet/manifests
$ vi /var/tmp/puppet/manifests/site.pp
<create file>
Alternatively, you can just specify the manifest itself:
$ sudo puppetmasterd --verbose --manifest ~/svn/puppet/manifests/site.pp
I also always at least run the daemons in verbose mode while testing. First
start the central daemon:
$ sudo puppetmasterd --verbose --confdir /var/tmp/puppet
By default, ``puppetmasterd`` looks for node definitions along these lines:
node mymachine {
include $operatingsystem
}
You can put any valid Puppet code in the structure, but the important
point is that the node definitions need to be there or you need to tell
``puppetmasterd`` they are not there by using the ``--nonodes`` argument. If
you are trying to write a config that works for both ``puppet`` (the
stand-alone executable) and ``puppetd`` (the client to ``puppetmasterd``),
then you should create the config without nodes and use the ``--nonodes``
argument.
Once you have the manifest, start the client, pointing it at the local server,
running in noop mode the first time:
$ sudo puppetd --verbose --confdir /var/tmp/puppet --server localhost --noop --onetime
This will connect to the server, retrieve the current machine's configuration,
and run it. In noop mode, this should work for any user, but if you run it as
a normal user you might get some errors if you are not in noop mode (e.g.,
normal users cannot use 'chown').
Note that your ``site.pp`` file should have a [node][] definition for the host
connecting; otherwise you will get an error complaining of no configuration for
that host. It is possible to skip this requirement -- see the ``--help``
output of ``puppetmasterd`` for details.
Configuration Testing
---------------------
Once you're successfully running the daemons, there are other useful flags you
can use to make your life easier. First is the '--test' flag for ``puppetd``,
which is the equivalent of running with ``--onetime --verbose --no-usecacheonfailure``,
which means the puppet client
will exit after the first run and will not use the cached configuration if the
central one is broken somehow (this is useful for those cases where you
accidentally cause a parsing error in the config).
Also, you can narrow down what portion of the configuration you are testing by
using '--tag'. For instance, say you are running this on a machine that is an
ldapserver, namedserver, and webserver, and you're adding ntpserver to the
list of classes being evaluated. Rather than sitting through the entire
config every run, just apply the ntpserver elements:
$ sudo puppet --server localhost --test --tag ntpserver
Every element in Puppet is tagged with the class or definition enclosing that
element, all the way up to the base of the configuration, and it is also
tagged with the host name. So if 'classA' includes 'classB' which creates
'fileC', then 'fileC' will be tagged with both classes.
[node]: structures.html#nodes
[source]: fromsvn.html
*$Id$*
|
