This directory is empty on purpose in git. Content in this folder is placed on installer packaging time and can be modified by user on target server where installer package is installed.
All application related configuration variables are defined in file application_configuration.yml in this folder. The name of configuration file does not matter but it must be given to ansible run as command line variable file.
Example:
./run_playbook.sh application.yml -i application/hosts.yml -e @application/application_configuration.yml
Application helm charts must be available on infra node before application playbook is executed. That folder on infra node is specified within app_helm_charts_infra_directory variable.
Helm charts folder name is configured on application_configuration.yml file with app_helm_charts_directory variable - it is the path on remote infrastructure server.
Example:
app_helm_charts_directory: /opt/application/helm_charts
It is expected that helm charts are available from packaging script as a part of installer SW package. Such source directory of helm charts is specified by app_helm_charts_install_directory variable
Example:
app_helm_charts_install_directory: ansible/application/helm_charts/kubernetes
Installer supports optional custom pre and post install roles. Custom roles' code folders need to be placed to this directory and name of those folders are configured in application.yml with variable application_pre_install_role and application_post_install_role.
Example:
application_pre_install_role: "{{ project_configuration }}-patch-role"
Ansible inventory file is least application specific but in practice example inventory file in git ansible/inventory/hosts.yml cannot be directly used anyway and at least ip addresses need to be changed according to target servers after installer installation and before starting installer execution.
So it's better to place also hosts.yml to this application directory and edit it here.