h1. Templates

The following functions and macros can be used within templates.  These are guaranteed to work via the safemode rendering, to ensure a template can do nothing harmful.  With safemode disabled ($$ADD instructions here$$), other macros may work, but are not supported at this time.

h2. Accessing Templates

There are two ways to render a template, based on a single host, or based on a Hostgroup.  The host or hostgroup provides all the details with which to render the template.  

h3. Host-based Rendering

Only a single template of each type may be rendered for a system.  Foreman determines which template to use following these rules:

1. Only the templates of the appropriate kind and associated with the hosts operating system are considered

2. If a template has a hostgroup/environment combination that matches that of the host, use this template else

3. If a template is associated with the environment of the host, use this template, else

4. Use the first template found associated with the operating system associated with the host.

So essentially, the hostgroup/environment combination is used first, then just the environment, and finally just the operating system of the host.

To access a template of a certain type simply use this url:

@/unattended/KIND_NAME@

For example:    @/unattended/provision@

would render the provisioning template.  The host will be based on the IP Address it is accessed from.  To spoof a template simply access the url in this manner:

@/unattended/provision?spoof=192.168.0.1@

where 192.168.0.1 is the ip address of the system you want to spoof. This allows you to view a template for a particular system from anywhere.  

h3. Hostgroup-based rendering

Allows any template to be rendered for any Hostgroup.  When rendering using a hostgroup, @host is actually the hostgroup instead of a defined host. The default values for the hostgroup are used for templated values.  This means if a value is not set in the hostgroup, you may get an error when rendering the template.  To access a template using a Hostgroup to render, simply use this URL:

/unattended/template/Template Name/Hostgroup Name

For example, a hostgroup of name Finance, and a template named WebServerKickstart could be rendered using the url:

/unattended/template/WebServerKickstart/Finance

h4.  PXE Menus

Pxe Menus can be deployed to smart proxies from the Config Tempalates.

h2. Writing templates

h2. Functions and macros:

|_.Name|_.Description|_.Example|

|root_pass  |The root password configured for the system| |

|ks_console | | |

|snippets(name)   | Renders the specified snippet | |

|foreman_url(kind)| Provides the full URL to a host-rendered template of the given kind  | foreman_url("provision") =>  http://HOST/unattended/provision |

|@host                |The name of the host| |

|@host.name                |The name of the host| |

|@host.diskLayout     |The disklayout of the host (could come from the operating system)| |

|@host.puppetmaster   |The puppetmaster the host should use | |

|@host.architecture   |The arch of the host (i.e. x86_64)| |

|@host.operatingsystem|The operating system name| |

|@host.operatingsystem.media_url |||

|@host.operatingsystem.major |The major version of the OS||

|@host.operatingsystem.minor |The minor version of the OS||

|@host.operatingsystem.family |The OS Family (I.e. redhat, debian, etc.)||

|@host.url_for_boot(:kernel) |||

|@host.url_for_boot(:initrd) |||

h3. Kickstart only variables:

|_.Name|_.Description|_.Example|

|@dynamic |||

|@osver |||

|@arch |||

|@mediapath |||

|@epel |||

|@yumrepo |||

|@static |||

h3. Preseed attributes:

|_.Name|_.Description|_.Example|

|@preseed_path |||

|@preseed_server |||