introduction to parameters in foreman

Introduction To Parameters

Tomer Brisker && Ori Rabin

About Us

Tomer Brisker● Lives in Tel Aviv● Software Engineer @

Red Hat● Father of Luna

About Us

Tomer Brisker● Lives in Tel Aviv● Software Engineer @

Red Hat● Father of Luna

Ori Rabin● Lives 5 minutes from

the office● Software Engineer @

Red Hat● Is the only girl on the

team

Parameters – what is it good for?

Well, actually quite a few things...

● Templating:– Provisioning templates– Partition table templates– Remote Execution job templates

● Configuration Management:– Puppet variables– Puppet class parameters– Salt pillars– Ansible host and group variables

● Scripting● Anywhere you wish!

Two kinds of parameters

“Smart” Parameters● More flexible● Types● User-defined order● Validations● Mergeable overrides● Attached to puppet

classes (for now)

“Simple” Parameters● Key-value● Strings● Fixed order● No validation● Only overrides

Global Parameters

Smart Class Parameters

Smart Variables

Host YAML

Classification

CC-BY-2.5 Drew R. Eddy, Julia A. Clarke - http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0017932

http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0017932

Classification

We looked at the code

But, it's actually pretty simple...

● Override order: fqdn, hostgroup, os● Matchers:

– fqdn = myHost.example.com value = “lions”

– hostgroup = example value = “tigers”

– os = myWeirdOs value = “bears”

● Default value: “oh my!”● You decide the order● Globals are a bit different● And that's it!

Host(group) Form

Audits

Plans for the future

● Make all parameters smart● Continue UI improvements● Organization/Location scoping● Versioning● Import/Export

Questions?

Thank you!

You can find us:

#theforeman and #theforeman-dev on freenode

[email protected]

@tbrisker_pro on twitter

mailto:[email protected]