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Yorgos Saslis 82eedbd622 Update ansible inventory file when template changes (#1612) 
This trigger ensures the inventory file is kept up-to-date. Otherwise, if the file exists and you've made changes to your terraform-managed infra without having deleted the file, it would never get updated. 

For example, consider the case where you've destroyed and re-applied the terraform resources, none of the IPs would get updated, so ansible would be trying to connect to the old ones.
2017-09-05 14:10:53 +03:00
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docs rename almost all mentions of kargo 2017-06-16 13:25:46 -04:00
modules Fixes for AWS Terraform Deployment 2017-03-20 12:08:17 +01:00
templates Fixes for AWS Terraform Deployment and Updated Readme 2017-04-12 15:15:54 +02:00
.gitignore Rewrote AWS Terraform for Kargo 2017-03-06 12:52:02 +01:00
create-infrastructure.tf Update ansible inventory file when template changes (#1612) 2017-09-05 14:10:53 +03:00
credentials.tfvars.example Rewrote AWS Terraform for Kargo 2017-03-06 12:52:02 +01:00
output.tf Fixes for AWS Terraform Deployment and Updated Readme 2017-04-12 15:15:54 +02:00
README.md rename almost all mentions of kargo 2017-06-16 13:25:46 -04:00
terraform.tfvars Fixes for AWS Terraform Deployment 2017-03-20 12:08:17 +01:00
terraform.tfvars.example Fixes for AWS Terraform Deployment and Updated Readme 2017-04-12 15:15:54 +02:00
variables.tf Fixes for AWS Terraform Deployment and Updated Readme 2017-04-12 15:15:54 +02:00

README.md

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 new AWS Elastic IPs: Depending on # of Availability Zones used (2 for each AZ)

  • Create an AWS EC2 SSH Key

  • Run with terraform apply --var-file="credentials.tfvars" or terraform apply depending if you exported your AWS credentials

  • 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.

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 hostsin 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.

AWS Infrastructure with Terraform