[rudder-users] question about Rudder Variable Uses

[Francois Armand]

On 10/03/2018 19:04, Vinoth Kumar wrote:
> Hi Team,
>
> How can I use variables in rudder.
>
> example:
> i want to add contents in a file which is the name of contains 
> hostname of the each server.
>
> like /opt/node1.xml /opt/node2.xml /opt/node3.xml . That means 
> /opt/$HOSTNAME.
>
> In this situation how to use to enforce contents in all server's file 
> using rudder technique.
>
> Thanks in advance,
> vinoth

Hello Vinoth,

You can use ${rudder.node.hostname} in directive parameters to have it 
replaced by the node hostname.
Unfortunatly, there is only a very limited set of properties under 
${rudder.node.*}, see the list here: 
https://www.rudder-project.org/doc-4.2/_variables.html#_system_variables
The feature request is traced in: 
https://www.rudder-project.org/redmine/issues/3112

You can also define any property (string or json) on a node, and get the 
value in directives with ${node.properties[json][path]}. See 
https://www.rudder-project.org/doc-4.2/_node_properties.html

Hope it helps,

-- 


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