# T-Pot Terraform
This [Terraform](https://www.terraform.io/) configuration can be used to launch a virtual machine, bootstrap any dependencies and install T-Pot in a single step.  
Configuration for Amazon Web Services (AWS) and Open Telekom Cloud (OTC) is currently included.
This can easily be extended to support other [Terraform providers](https://www.terraform.io/docs/providers/index.html).

[Cloud-init](https://cloudinit.readthedocs.io/en/latest/) is used to bootstrap the instance and install T-Pot on startup.

# Table of Contents
- [What get's created](#what-created)
  - [Amazon Web Services (AWS)](#what-created-aws)
  - [Open Telekom Cloud (OTC)](#what-created-otc)
- [Prerequisites](#pre)
  - [Amazon Web Services (AWS)](#pre-aws)
  - [Open Telekom Cloud (OTC)](#pre-otc)
- [Terraform Variables](#variables)
  - [Common configuration items](#variables-common)
  - [Amazon Web Services (AWS)](#variables-aws)
  - [Open Telekom Cloud (OTC)](#variables-otc)
- [Initialising](#initialising)
- [Applying the Configuration](#applying)
- [Connecting to the Instance](#connecting)

<a name="what-created"></a>
## What get's created

<a name="what-created-aws"></a>
### Amazon Web Services (AWS)
* EC2 instance:
  * t3.large (2 vCPUs, 8 GB RAM)
  * 128 GB disk
  * Debian 10
  * Public IP
* Security Group:
  * TCP/UDP ports <= 64000 open to the Internet
  * TCP ports 64294, 64295 and 64297 open to a chosen administrative IP

<a name="what-created-otc"></a>
### Open Telekom Cloud (OTC)
* ECS instance:
  * s2.medium.8 (1 vCPU, 8 GB RAM)
  * 128 GB disk
  * Debian 10
  * Public EIP
* Security Group
* Network, Subnet, Router (= Virtual Private Cloud [VPC])

<a name="pre"></a>
## Prerequisites
* [Terraform](https://www.terraform.io/) 0.13

<a name="pre-aws"></a>
### Amazon Web Services (AWS)
* AWS Account
  * Existing VPC: VPC ID needs to be specified in `aws/variables.tf`
  * Existing subnet: Subnet ID needs to be specified in `aws/variables.tf`
  * Existing SSH key pair: Key name needs to be specified in `aws/variables.tf`
* AWS Authentication credentials should be [set using environment variables](https://www.terraform.io/docs/providers/aws/index.html#environment-variables)

<a name="pre-otc"></a>
### Open Telekom Cloud (OTC)
* OTC Account
  * Existing SSH key pair: Key name needs to be specified in `otc/variables.tf`
* OTC Authentication credentials (Username, Password, Project Name, User Domain Name) can be set in the `otc/clouds.yaml` file

<a name="variables"></a>
## Terraform Variables

<a name="variables-common"></a>
### Common configuration items
These variables exist in `aws/variables.tf` and `otc/variables.tf` respectively.  
Settings for cloud-init:  
* `timezone` - Set the Server's timezone
* `linux_password`- Set a password for the Linux Operating System user (which is also used on the Admin UI)

Settings for T-Pot:  
* `tpot_flavor` - Set the flavor of the T-Pot (Available flavors are listed in the variable's description)
* `web_user` - Set a username for the T-Pot Kibana Dasboard
* `web_password` - Set a password for the T-Pot Kibana Dashboard

<a name="variables-aws"></a>
### Amazon Web Services (AWS)
In `aws/variables.tf`, you can change the additional variables:
* `admin_ip` - source IP address(es) that you will use to administer the system. Connections to TCP ports 64294, 64295 and 64297 will be allowed from this IP only. Multiple IPs or CIDR blocks can be specified in the format: `["127.0.0.1/32", "192.168.0.0/24"]`
* `ec2_vpc_id` - Specify an existing VPC ID
* `ec2_subnet_id` - Specify an existing Subnet ID
* `ec2_region`
* `ec2_ssh_key_name` - Specify an existing SSH key pair
* `ec2_instance_type`

<a name="variables-otc"></a>
### Open Telekom Cloud (OTC)
In `otc/variables.tf`, you can change the additional variables:
* `availability_zone`
* `flavor`
* `key_pair` - Specify an existing SSH key pair
* `image_id`
* `volume_size`  
Furthermore you can configure the naming of the created infrastructure (per default everything gets prefixed with "tpot-", e.g. "tpot-router").

<a name="initialising"></a>
## Initialising
The [`terraform init`](https://www.terraform.io/docs/commands/init.html) command is used to initialize a working directory containing Terraform configuration files.

```
$ cd aws
$ terraform init
```
OR
```
$ cd otc
$ terraform init
```

<a name="applying"></a>
## Applying the Configuration
The [`terraform apply`](https://www.terraform.io/docs/commands/apply.html) command is used to apply the changes required to reach the desired state of the configuration, or the pre-determined set of actions generated by a [`terraform plan`](https://www.terraform.io/docs/commands/plan.html) execution plan.

```
$ terraform apply
```
This will create your infrastructure and start a Cloud Server. On startup, the Server gets bootstrapped with cloud-init and will install T-Pot. Once this is done, the server will reboot.

If you want the remove the built infrastructure, you can run [`terraform destroy`](https://www.terraform.io/docs/commands/destroy.html) to delete it.

<a name="connecting"></a>
## Connecting to the Instance
When the installation is completed, you can proceed with connecting/logging in to the T-Pot according to the [documentation](https://github.com/telekom-security/tpotce#ssh-and-web-access).
