35d48cc88c
* Point apiserver address to 0.0.0.0 Added loadbalancer api server address * Update documentation
65 lines
2.4 KiB
Markdown
65 lines
2.4 KiB
Markdown
## Kubernetes on AWS with Terraform
|
|
|
|
**Overview:**
|
|
|
|
This project will create:
|
|
* VPC with Public and Private Subnets in # Availability Zones
|
|
* Bastion Hosts and NAT Gateways in the Public Subnet
|
|
* A dynamic number of masters, etcd, and worker nodes in the Private Subnet
|
|
* even distributed over the # of Availability Zones
|
|
* AWS ELB in the Public Subnet for accessing the Kubernetes API from the internet
|
|
|
|
**Requirements**
|
|
- Terraform 0.8.7 or newer
|
|
|
|
**How to Use:**
|
|
|
|
- Export the variables for your AWS credentials or edit `credentials.tfvars`:
|
|
|
|
```
|
|
export AWS_ACCESS_KEY_ID="www"
|
|
export AWS_SECRET_ACCESS_KEY ="xxx"
|
|
export AWS_SSH_KEY_NAME="yyy"
|
|
export AWS_DEFAULT_REGION="zzz"
|
|
```
|
|
- Rename `contrib/terraform/aws/terraform.tfvars.example` to `terraform.tfvars`
|
|
|
|
- Update `contrib/terraform/aws/terraform.tfvars` with your data
|
|
- Allocate a new AWS Elastic IP. Use this for your `loadbalancer_apiserver_address` value (below)
|
|
- Create an AWS EC2 SSH Key
|
|
- Run with `terraform apply --var-file="credentials.tfvars"` or `terraform apply` depending if you exported your AWS credentials
|
|
|
|
Example:
|
|
```commandline
|
|
terraform apply -var-file=credentials.tfvars -var 'loadbalancer_apiserver_address=34.212.228.77'
|
|
```
|
|
|
|
- Terraform automatically creates an Ansible Inventory file called `hosts` with the created infrastructure in the directory `inventory`
|
|
|
|
- Once the infrastructure is created, you can run the kubespray playbooks and supply inventory/hosts with the `-i` flag.
|
|
|
|
Example (this one assumes you are using CoreOS)
|
|
```commandline
|
|
ansible-playbook -i ./inventory/hosts ./cluster.yml -e ansible_ssh_user=core -e bootstrap_os=coreos -b --become-user=root --flush-cache
|
|
```
|
|
|
|
**Troubleshooting**
|
|
|
|
***Remaining AWS IAM Instance Profile***:
|
|
|
|
If the cluster was destroyed without using Terraform it is possible that
|
|
the AWS IAM Instance Profiles still remain. To delete them you can use
|
|
the `AWS CLI` with the following command:
|
|
```
|
|
aws iam delete-instance-profile --region <region_name> --instance-profile-name <profile_name>
|
|
```
|
|
|
|
***Ansible Inventory doesnt get created:***
|
|
|
|
It could happen that Terraform doesnt create an Ansible Inventory file automatically. If this is the case copy the output after `inventory=` and create a file named `hosts`in the directory `inventory` and paste the inventory into the file.
|
|
|
|
**Architecture**
|
|
|
|
Pictured is an AWS Infrastructure created with this Terraform project distributed over two Availability Zones.
|
|
|
|
|