How can I use puppetdbquery to return fqdn of one node as string?

Question

How can I use puppetdbquery to return fqdn of one node as string?

toepi opened this issue 9 years ago · comments

I've a database server (Class[databaseserver]), now I need the fqdn of this node to configure different clients which use a string to configure the host of the database. Best sample is the puppetlabs puppetdb module which do it in this way.

If I try:

puppetdb::master::config::puppetdb_server::_puppetdbquery: 'Class[daabaseserver]'

puppetdb module write to syslog:

can not connect to [fqdn-of-dbhost]:8081

because fqdn is in an array instead of a string.

A workaround replace string with an array but than I must think at modules level 'Can I use puppetdb query to get this value'. And create 'wrapper' to convert array to string.

Erik Dalén · Answer 1 · Mon Oct 12 2015 07:28:28 GMT+0800 (China Standard Time)

At the moment you would have to create a small wrapper class to pick the first value from the array. Or do something like this in the node definition:

class { 'puppetdb::master::config':
  puppetdb_server => query_nodes('Class[databaseserver]')[0]
}

toepi · Answer 2 · Tue Oct 13 2015 02:50:10 GMT+0800 (China Standard Time)

Thanks @dalen,

Any future plan to support this kind of usecase in hiera?

Erik Dalén · Answer 3 · Tue Oct 13 2015 03:08:20 GMT+0800 (China Standard Time)

Not really, no. The main purpose of hiera was to separate code and data, and if you put too much functionality for data transformations and functions and stuff into hiera it too becomes "code" really. Eventually you would end up needing a hiera-lint.