https://github.com/bakins/kubernetes-coreos-terraform

Simple Kubernetes cluster on CoreOS in AWS using Terraform
https://github.com/bakins/kubernetes-coreos-terraform

Last synced: about 2 months ago
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Simple Kubernetes cluster on CoreOS in AWS using Terraform

• Host: GitHub
• URL: https://github.com/bakins/kubernetes-coreos-terraform
• Owner: bakins
• License: mit
• Created: 2015-05-28T20:29:26.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2016-02-27T02:01:34.000Z (over 8 years ago)
• Last Synced: 2024-07-20T03:19:03.313Z (2 months ago)
• Language: HCL
• Size: 29.3 KB
• Stars: 113
• Watchers: 12
• Forks: 31
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Kubernetes on CoreOS in AWS using Terraform

Provision a [Kubernetes](http://kubernetes.io) cluster with [Terraform](https://www.terraform.io) on AWS.

Inspired by [kubestack](https://github.com/kelseyhightower/kubestack)

## Status

This is no longer maintained. All the versions are old. Feel free to use this to inspire you.  

## Prep

- [Install Terraform](https://www.terraform.io/intro/getting-started/install.html)

## Terraform

Terraform will be used to declare and provision a Kubernetes cluster.

## Prep

Create a `terraform.tfvars` file in the top-level directory of the repo with content like:

```

ssh_key_name = name_of_my_key_pair_in_AWS

access_key = my_AWS_access_key

secret_key = my_AWS_secret_key

```

This file is ignored by git.  You can also set these by using [environment variables](https://www.terraform.io/docs/configuration/variables.html).

You also need to make sure you are running ssh-agent and have your AWS key added.

### Usage

This repo includes a very simple [Makefile](./Makefile) that will handle generating an etcd [discovery token](https://coreos.com/docs/cluster-management/setup/cluster-discovery/).

To create the cluster, run `make apply`

To destroy the cluster, run `make destroy`

You can override any variables listed in [variables.tf](./variables.tf) such as the ami to use, number of nodes, etc

## Next Steps

When you create a cluster, it will output something like:

```

Outputs:

  kubernetes-api-server =

# Use these commands to configure kubectl

kubectl config set-cluster testing --insecure-skip-tls-verify=true --server=IP

kubectl config set-credentials admin --token='4c98e411'

kubectl config set-context testing --cluster= testing --user=admin

kubectl config use-context testing

```

Run these commands to configure `kubectl`.  You can see these commands again by running `terraform output kubernetes-api-server`

Test this by running `kubectl get nodes`

You should now be able to use `kubectl` to create services. See the [kubernetes examples](https://github.com/GoogleCloudPlatform/kubernetes/tree/master/examples) to get started.

## TODO

## Differences from kubestack

Most of the differences are based on my personal opionions and/or just

trying a different approach.

- We use base CoreOS image and install Kubernetes at boot time.  This

  was originally to skip the "build image, upload, test, repeat" cycle

  during development, but it does expose the install process more

  clearly.

- We use etcd in proxy mode on the master and workers rather than

   pointing directly to etcd servers.