73 lines
2.7 KiB
Text
73 lines
2.7 KiB
Text
cdist-types(7)
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===============
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Nico Schottelius <nico-cdist--@--schottelius.org>
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NAME
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----
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cdist-types - Functionality bundled
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DESCRIPTION
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-----------
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A cdist type describes some kind of functionality, starting from simple stuff
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like copying files until complex user auth/ldap/ kerberos infrastructure
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designs. The name of every type is prefixed with two underscores (__), because
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types will be executed and the two underscores prevent collisions with real
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binaries (like "file").
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In general, types should be written independent of hosts (as in reusable
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code), but may be used implement functionality only needed on one host
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as well.
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It must be assumed that the clients are pretty dumb and thus do not have high
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level tools like ruby installed. If a type requires specific tools to be present
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on the target, there must be another type that provides this tool and the first
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type must create an object of the specific type.
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If the generated code fails on the client, it must print diagnostistic messages on
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stderr and exit non-zero, so the configuration is aborted.
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Types may make use of other types to realise a new type or may implement some
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functionality on their own.
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Types may consist of
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- a number of required and optional parameters they accept,
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- a manifest script that makes use of the parameters and may create other objects
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- explorers that explore type specific information on the target
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- a gencode script, that may generate code to be executed on the target
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Every time a type is used, a new object is created of the specific type,
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with a type specific unique id that stores the parameters
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HOW TO WRITE A NEW TYPE (TODO)
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------------------------------
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Assume you want to create the new type named "coffee":
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Create the directory /etc/cdist/types/coffee/
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Create the file /etc/cdist/types/coffee/README containing a description of the
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type.
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If your type supports attributes, create the directory /etc/cdist/types/coffee/
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attributes.
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For each attribute, create the file
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/etc/cdist/types/coffee/attributes/$attribute_name which contains
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a short description on the first line
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then a blank line
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then a long description (probably over several lines)
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If you think your type may be useful for others, submit it for inclusion
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into cdist at cdist -- at -- l.schottelius.org.
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Create /etc/cdist/types/coffee/init which reads $configinput
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(either via cconfig or via environment) and outputs a block of
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shell code suitable for running on the client.
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SEE ALSO
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--------
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cdist-config-layout(7), cdist-type-manifest(7), cdist-type-explorer(7),
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cdist-type-gencode(7)
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COPYING
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-------
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Copyright \(C) 2010-2011 Nico Schottelius. Free use of this software is
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granted under the terms of the GNU General Public License version 3 (GPLv3).
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