begin to cleanup doc/man/cdist-types.text
Signed-off-by: Nico Schottelius <nico@kr.ethz.ch>
This commit is contained in:
Nico Schottelius
parent
b8156ebede
commit
8513cca4d1
1 changed files with 38 additions and 76 deletions
|
|
@ -10,97 +10,59 @@ 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.
|
||||
|
||||
meta/
|
||||
default (shell script)
|
||||
types/
|
||||
pukman/
|
||||
|
||||
2) 2010-11-09
|
||||
|
||||
How to write my own type named "coffee":
|
||||
|
||||
Create the directory /etc/cdist/types/coffee/
|
||||
Create the file /etc/cdist/types/coffee/README containing a description of the
|
||||
type.
|
||||
If your type supports attributes, create the directory /etc/cdist/types/coffee/
|
||||
attributes.
|
||||
For each attribute, create the file
|
||||
/etc/cdist/types/coffee/attributes/$attribute_name which contains
|
||||
|
||||
a short description on the first line
|
||||
then a blank line
|
||||
then a long description (probably over several lines)
|
||||
|
||||
If you think your type may be useful for others, submit it for inclusion
|
||||
into cdist at cdist -- at -- l.schottelius.org.
|
||||
|
||||
Create /etc/cdist/types/coffee/init which reads $configinput
|
||||
(either via cconfig or via environment) and outputs a block of
|
||||
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
|
||||
- are independent of hosts in general
|
||||
- may make use of other types to realise a new type
|
||||
- how to overwrite stuff?
|
||||
- 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
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
Differences manifests vs. types
|
||||
|
||||
HOW TO WRITE A NEW TYPE (TODO)
|
||||
-----------------------
|
||||
Assume you want to create the new type named "coffee":
|
||||
|
||||
manifests types
|
||||
Create the directory /etc/cdist/types/coffee/
|
||||
Create the file /etc/cdist/types/coffee/README containing a description of the
|
||||
type.
|
||||
If your type supports attributes, create the directory /etc/cdist/types/coffee/
|
||||
attributes.
|
||||
For each attribute, create the file
|
||||
/etc/cdist/types/coffee/attributes/$attribute_name which contains
|
||||
|
||||
main purpose map config to host provide functionality
|
||||
can change config no (prevent conflicts) yes (allow inheritance)
|
||||
specificness site specific (globally) reusable
|
||||
a short description on the first line
|
||||
then a blank line
|
||||
then a long description (probably over several lines)
|
||||
|
||||
If you think your type may be useful for others, submit it for inclusion
|
||||
into cdist at cdist -- at -- l.schottelius.org.
|
||||
|
||||
Create /etc/cdist/types/coffee/init which reads $configinput
|
||||
(either via cconfig or via environment) and outputs a block of
|
||||
shell code suitable for running on the client.
|
||||
|
||||
|
||||
SEE ALSO
|
||||
|
|
|
|||
Loading…
Reference in a new issue