credentials.j2.properties

credentials {
    {% for credential_name, credential_value in jenkins_system_credentials %}
        {{credential_name | replace("-","_")}}: {
            type = "{{credential_value.type}}"
            credentialsId = "{{credential_value.credentialsid}}"
            description = "{{credential_value.description}}"
            userId = "{{credential_value.userid}}"
            {% if credential_value.value is defined %}
            value = "credential_value.value"
            {% endif %}
            {% if credential_value.passphrase is defined %}
            passphrase = "{{credential_value.passphrase}}"
            {% endif %}
            {% if credential_value.path is defined %}
            path = "{{credential_value.passphrase}}"
            {% endif %}
        }
    {% endfor %}
}

slaves.j2.properties

slaves {
{% for slave_name, slave_value  in jenkins_slaves %}
    {{slave_name | replace("-","_") }} {
        name = "{{slave_value.name}}"
        type = "slave_value.type"
        {% if  slave_value.type == "ssh" %}
        host = "{{slave_value.host}}"
        port = "{{slave_value.port}}"
        credentialsId = "slave_value.credentialsid"
        {% endif %}
        description = "{{slave_value.description}}"
        executors = "{{slave_value.executors}}"
        remoteFS = "{{slave_value.remotefs}}"
        labels = "{{slave_value.labels}}"
        retention = "{{slave_value.retention}}"
        mode = "{{slave_value.mode}}"
    }
{% endofr %}