solisquad.blogg.se - Terraform aws bastion host

Terraform aws bastion host full#
Terraform aws bastion host code#

To enable ssh traffic be routed between the two vpc subnets, the route tables created with the VPC modules need to be updated: We now need to access both mgmt_vpc and dev_vpc states:

Terraform aws bastion host code#

The code to establish the peering between mgmt_vpc and dev_vpc is in the .tf file, located in mgmt_dev_vpcs_peering folder. This is the outputs.tf file for this environment: This is the variables.tf file for this environment: This module defines the following attributes of our EC2 instance, through variables which are defined in variables.tf file. pub file contents have to be added in variables.tf file. Then open your your_dev_key_name.pub and copy its content paste it in the variable ssh_public_key in dev_vpc/variables.tf file.įilename your_dev_key_name is referenced in mgmt_vpc Terraform code and the. Ssh-keygen -t rsa -b 4096 -C -f $HOME/.ssh/your_dev_key_name To do so, launch the command from your terminal: To access the bastion host from your local machine, you need to create the SSH Keypair (a new one for dev einvironment) to access the bastion host via SSH. To allow access to the private instance from the bastion host, we need to enable SSH traffic by using the security group created through the VPC module above: The code to build this VPC looks is located in dev_vpc folder, which is very similar to the code we used to provion the management VPC. Output values are configured in the file outputs.tf: Terraform Input Variables contain configuration parameters, located in the variables.tf file: This module defines the following attributes of our EC2 instance, through variables which are defined in variables.tf file: To build an EC2 instance, we use the AWS EC2 Instance Terraform module: To associate the newly defined key, we need to add the following resource: To let your bastion host access via ssh the private instance on the peered vpc, you need to set-up the ssh agent forwarding on your local machine. Then open your your_key_name.pub and copy its content paste it in the variable ssh_public_key in mgmt_vpc/variables.tf file.įilename your_key_name is referenced in mgmt_vpc Terraform code and the. Ssh-keygen -t rsa -b 4096 -C -f $HOME/.ssh/your_key_nameīy default, your newly generated key files (private and public) will be stored in ~/.ssh folder. To access the bastion host from your local machine, you need to create the SSH Keypair to access the bastion host via SSH.

To allow access the bastion host from your local machine, we need to enable SSH traffic by using the security group created through the VPC module above: This module defines the following attributes of our VPC, through variables which are defined in variables.tf file: Define AWS Providerįirst, we need to define the AWS provider:Īfter that, we make use of the AWS VPC Terraform module, which creates VPC resources on AWS: Let’s look at the main_mgmt.tf file first, located in mgmt_vpc folder and containing the provisioning code to build the management vpc. State is managed locally, in default terraform.tfstate files, located in each folder.

mgmt_dev_vpcs_peering containing the code to set-up the VPC peering, the updates of route tables to allow traffic routing between the VPCs.

mgmt_vpc containing the code to set-up the management VPC, EC2 private instance, and the security group enabling SSH traffic.

dev_vpc containing the code to set-up the development VPC, EC2 bastion host, and the security group enabling SSH traffic.

On my Github account you can also find repositories to practice on earlier steps if needed, such as creating a github account, building a basic EC2 and a VPC with Terraform on AWS.Ĭode can be cloned from my github repository. The whole set-up can be built within the AWS free-tier program. We’ll use the latest (at writing time) ubuntu ami for both EC2 instances. VPC peering ensures connectivity between the two VPCs.Ī basic EC2 instance acting as Bastion Host is deployed in the management VPC to get access to the EC2 instance built in the private subnet of the peered development VPC. VPCs are deployed in one region and availability zone both VPCs have internet access through internet gateways and NAT gateways.

Terraform aws bastion host full#

This post shows how Terraform works to provision infrastructure resources on AWS in full automation, with a use case covering the necessary steps to segregate environments and build a cross- VPC which offers management services (such as monitoring, logging, CI/CD) to a development application VPCs.