How to provide attribute value in the template .erb file - ruby

Question

How to provide attribute value in a template .erb file
qradar_logs/
├── Berksfile
├── LICENSE
├── README.md
├── attributes
│   └── default.rb
├── chefignore
├── files
│   └── default
│   └── default
├── metadata.rb
├── recipes
│   └── default.rb
├── spec
│   ├── spec_helper.rb
│   └── unit
│   └── recipes
│   └── default_spec.rb
├── templates
│   └── rsyslog.conf.erb
└── test
└── integration
└── default
└── default_test.rb
11 directories, 12 files
In attribute.rb file, I have the following contents:
default['logs']['hostname'] = "169.67.89.72:514"
In my recipe, I provided the following:
hostname = node['logs']['hostname']
In my templates rsyslog.conf file, I would like to use this value based on the value changed in attributes file.
I tried giving:
<%= "#{hostname}" %>
It errors out as:
FATAL: Chef::Mixin::Template::TemplateError: undefined local variable or method `hostname'
How can I access the attributes defined in attribute file in template.erb file?
Thank you

Answer 1

So a few things. First you should use the variables property in your template resource to expose the data to the template:
template '/whatever' do
# ...
variables hostname: node['logs']['hostname']
end
Then you need to use Erb formatting, which you kind of did but not really:
<%= #hostname %>
The variable name matches the key you used with variables.