Hashistack Ansible uses a configuration directory to store all the configuration files and other artifacts.
This directory is defined with the variable `configuration_directory`. By default, it will look at `{{ lookup('env', 'PWD') }}/etc/hashistack`, which equals `$(pwd)/etc/hashistack`.
Under this directory, you are expected to place the `globals.yml` file, with your configuration.
### Sub configuration directories
#### Group configuration directories
Additionally, subdirectories can be used to tailor the configuration further.
Each group within the `inventory` will look at a directory named after itself:
- nomad_servers group will look for `{{ configuration_directory }}/nomad_servers`
- vault_servers group will look for `{{ configuration_directory }}/vault_servers`
- consul_servers group will look for `{{ configuration_directory }}/consul_servers`
Within each of these directories, you can place an additional `globals.yml file`, that will superseed the file at the root of the configuration directory.
- **Example**:
If `etc/hashistack/globals.yml` looks like:
```yaml
---
enable_vault: "no"
enable_consul: "no"
enable_nomad: "no"
```
And `etc/hashistack/nomad_servers/globals.yml` looks like:
```yaml
---
enable_nomad: "yes"
```
Servers in the `nomad_servers` group will end up with the following configuration:
```yaml
---
enable_vault: "no"
enable_consul: "no"
enable_nomad: "yes"
```
This approach lets you customize your deployment for your exact needs.
#### Host configuration directories
Additionally, within each `group configuration directory`, you can add `host configuration directory`, that will be named after the hosts defined in your `inventory`. These host directories can also be populated with a `globals.yml` file, that will superseed the `group` and `deployment` configuration files.
- **Example**
If `etc/hashistack/globals.yml` looks like:
```yaml
---
enable_vault: "no"
enable_consul: "no"
enable_nomad: "no"
api_interface: "eth0"
```
And `etc/hashistack/nomad_servers/globals.yml` looks like:
```yaml
---
enable_nomad: "yes"
api_interface: "eth1"
```
And `etc/hashistack/nomad_servers/nomad-master-01/globals.yml` looks like:
```yaml
api_interface: "eth0.vlan40"
```
Servers in the `nomad_servers` group will end up with the following configuration:
