# terraform-aws-eks

A terraform module to create a managed Kubernetes cluster on AWS EKS. Available
through the [Terraform registry](https://registry.terraform.io/modules/terraform-aws-modules/eks/aws).
Inspired by and adapted from [this doc](https://www.terraform.io/docs/providers/aws/guides/eks-getting-started.html)
and its [source code](https://github.com/terraform-providers/terraform-provider-aws/tree/master/examples/eks-getting-started).

| Branch | Build status                                                                                                                                                      |
| ------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| master | [![build Status](https://travis-ci.org/terraform-aws-modules/terraform-aws-eks.svg?branch=master)](https://travis-ci.org/terraform-aws-modules/terraform-aws-eks) |

## Assumptions

* You want to create a set of resources around an EKS cluster: namely an autoscaling group of workers and a security group for them.
* You've created a Virtual Private Cloud (VPC) and subnets where you intend to put this EKS.

## Usage example

A full example leveraging other community modules is contained in the [examples/eks_test_fixture directory](https://github.com/terraform-aws-modules/terraform-aws-eks/tree/master/examples/eks_test_fixture). Here's the gist of using it via the Terraform registry:

```hcl
module "eks" {
  source                = "terraform-aws-modules/eks/aws"
  version               = "0.1.0"
  cluster_name          = "test-eks-cluster"
  subnets               = ["subnet-abcde012", "subnet-bcde012a"]
  tags                  = "${map("Environment", "test")}"
  vpc_id                = "vpc-abcde012"
  workers_ami_id        = "ami-123456"
  cluster_ingress_cidrs = ["24.18.23.91/32"]
}
```

## Testing

This module has been packaged with [awspec](https://github.com/k1LoW/awspec) tests through [kitchen](https://kitchen.ci/) and [kitchen-terraform](https://newcontext-oss.github.io/kitchen-terraform/). To run them:

1. Install [rvm](https://rvm.io/rvm/install) and the ruby version specified in the [Gemfile](https://github.com/terraform-aws-modules/terraform-aws-eks/tree/master/Gemfile).
2. Install bundler and the gems from our Gemfile:

    ```bash
    gem install bundler && bundle install
    ```

3. Ensure your AWS environment is configured (i.e. credentials and region) for test.
4. Test using `bundle exec kitchen test` from the root of the repo.

## Doc generation

Documentation should be modified within `main.tf` and generated using [terraform-docs](https://github.com/segmentio/terraform-docs).
Generate them like so:

```bash
go get github.com/segmentio/terraform-docs
terraform-docs md ./ | cat -s | ghead -n -1 > README.md
```

## Contributing

Report issues/questions/feature requests on in the [issues](https://github.com/terraform-aws-modules/terraform-aws-eks/issues/new) section.

Full contributing [guidelines are covered here](https://github.com/terraform-aws-modules/terraform-aws-eks/blob/master/CONTRIBUTING.md).

## IAM Permissions

Testing and using this repo requires a minimum set of IAM permissions. Test permissions
are listed in the [eks_test_fixture README](https://github.com/terraform-aws-modules/terraform-aws-eks/tree/master/examples/eks_test_fixture/README.md).

## Change log

The [changelog](https://github.com/terraform-aws-modules/terraform-aws-eks/tree/master/CHANGELOG.md) captures all important release notes.

## Authors

Created and maintained by [Brandon O'Connor](https://github.com/brandoconnor) - brandon@atscale.run.
Many thanks to [the contributors listed here](https://github.com/terraform-aws-modules/terraform-aws-eks/graphs/contributors)!

## License

MIT Licensed. See [LICENSE](https://github.com/terraform-aws-modules/terraform-aws-eks/tree/master/LICENSE) for full details.

## Inputs

| Name | Description | Type | Default | Required |
|------|-------------|:----:|:-----:|:-----:|
| cluster_ingress_cidrs | The CIDRs from which we can execute kubectl commands. | list | - | yes |
| cluster_name | Name of the EKS cluster. | string | - | yes |
| cluster_version | Kubernetes version to use for the cluster. | string | `1.10` | no |
| subnets | A list of subnets to associate with the cluster's underlying instances. | list | - | yes |
| tags | A map of tags to add to all resources | string | `<map>` | no |
| vpc_id | VPC id where the cluster and other resources will be deployed. | string | - | yes |
| workers_ami_id | AMI ID for the eks workers. | string | - | yes |
| workers_asg_desired_capacity | description | string | `1` | no |
| workers_asg_max_size | description | string | `3` | no |
| workers_asg_min_size | description | string | `1` | no |
| workers_instance_type | Size of the workers instances. | string | `m4.large` | no |

## Outputs

| Name | Description |
|------|-------------|
| cluster_certificate_authority_data | Nested attribute containing certificate-authority-data for your cluster. Tis is the base64 encoded certificate data required to communicate with your cluster. |
| cluster_endpoint | The endpoint for your Kubernetes API server. |
| cluster_id | The name/id of the cluster. |
| cluster_security_group_ids | description |
| cluster_version | The Kubernetes server version for the cluster. |
| config_map_aws_auth |  |
| kubeconfig | kubectl config file contents for this cluster. |