https://github.com/wcooley/puppet-puppet_mutex

Do-nothing define to implement a mutex between classes and defines.
https://github.com/wcooley/puppet-puppet_mutex

Last synced: about 1 month ago
JSON representation

Do-nothing define to implement a mutex between classes and defines.

• Host: GitHub
• URL: https://github.com/wcooley/puppet-puppet_mutex
• Owner: wcooley
• License: apache-2.0
• Created: 2014-01-15T08:34:44.000Z (almost 11 years ago)
• Default Branch: master
• Last Pushed: 2014-11-07T05:52:00.000Z (about 10 years ago)
• Last Synced: 2024-03-14T20:04:28.945Z (10 months ago)
• Language: Puppet
• Size: 176 KB
• Stars: 1
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

        
puppet_mutex

============

Do-nothing define to clearly express and enforce mutal exclusivity between

classes or defines.

Sometimes one has classes which, while otherwise unrelated, should never both

be declared for the same host. For example, one generally cannot manage local

accounts while LDAP is configured for managing accounts. There is no obvious

error that this should be so, except that the `useradd` provider for the

`user` type will fail with some incomprehensible message. Pretty much

everything else will work, however, so noticing the error requires looking

for it.

With a `puppet_mutex` with the same name declared in both classes, the catalog

will fail to compile so mistakes are easier to notice.Moreover, a declaration

with this define clearly expresses the intention that the two classes should

never both be declare.

Attempting to use the `defined` function to enforce exclusivity is unreliable,

as it is parse-order dependent and generally suggested against.

Parameters

----------

None.

Variables

---------

None.

Examples

--------

To ensure that `account::ldap` and `account::local` cannot be both declared

at the same time, declare the same puppet_mutex in both classes.

    class account::ldap {

      puppet_mutex { 'user-account': }

    }

    class account::local {

      puppet_mutex { 'user-account': }

    }

Author

------

Wil Cooley 

Copyright

---------

Copyright 2014 Wil Cooley