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begin to cleanup doc/man/cdist-types.text

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Signed-off-by: Nico Schottelius <nico@kr.ethz.ch>
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Nico Schottelius 2011-02-23 13:55:42 +01:00
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doc/man/cdist-types.text
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@ -10,33 +10,40 @@ cdist-types - Functionality bundled
DESCRIPTION
-----------
A cdist type describes some kind of functionality.
Types can be run from manifests.
It is recommeneded to prefix all types with two
underscores, because types will be executed and
thus you prevent collisions with real binaries
(like "file").
A cdist type describes some kind of functionality, starting from
simple stuff like copying files until complex user auth/ldap/
kerberos infrastructure designs.
This document is a brainstorming document, on how to integrate types.
The name of every type is prefixed with two underscores (__),
because types will be executed and the two underscores prevent
collisions with real binaries (like "file").
Proposed/discussed structures:
It must be assumed that the clients are pretty dumb
and thus do not have high level tools like python
installed.
1) 2010-11-02
$basedir/$type/
properties/
name/
required # required | optional
choices # \n liste
If a type requires specific tools to be present
on the target, there must be another type that
provides this tool and the first type must create
an object of the specific type.
If the generated code fails on the client, it must
print diagnostistic messages on stderr and call
"exit 1", so the configuration is aborted.
- are independent of hosts in general
- may make use of other types to realise a new type
- can overwrite stuff (HOW?)
- overwrite in own tree?
- needs knowledge of inherited provider
- similar to current situation in puppet,
but more like reusable defines
- or may implement some functionality on their own
meta/
default (shell script)
types/
pukman/
2) 2010-11-09
How to write my own type named "coffee":
HOW TO WRITE A NEW TYPE (TODO)
-----------------------
Assume you want to create the new type named "coffee":
Create the directory /etc/cdist/types/coffee/
Create the file /etc/cdist/types/coffee/README containing a description of the
@ -58,51 +65,6 @@ attributes.
shell code suitable for running on the client.
--------------------------------------------------------------------------------
type layout:
<name>/
config # binary that is called to adjust cconfig tree
change # binary that is called on the remote host?
--------------------------------------------------------------------------------
Scope of code execution on the client
It should be assumed that the clients are pretty dumb
and thus do not have high level tools like python
installed.
If a type requires specific tools to be present
on the target, there must be another type that
provides this tool and the first type must create
an object of the specific type.
If the generated code fails on the client, it must
print diagnostistic messages on stderr and call
"exit 1", so the configuration is aborted.
--------------------------------------------------------------------------------
- have required and optional arguments
- are independent of hosts
- may make use of other types to realise a new type
- how to overwrite stuff?
- overwrite in own tree?
- needs knowledge of inherited provider
- similar to current situation in puppet,
but more like reusable defines
- or may implement some functionality on their own
--------------------------------------------------------------------------------
Differences manifests vs. types
manifests types
main purpose map config to host provide functionality
can change config no (prevent conflicts) yes (allow inheritance)
specificness site specific (globally) reusable
SEE ALSO
--------