API Multy-VM Setup

Group API Multi VM setup on AWS (Terraform/Docker)

provider.tf file is used for interaction to AWS resources:

• we get version and region so it defaults to those options

vpc.tf files define the virtual network:

• calling only a simple cidr_block which defines the network range

subnet.tf file defines the subnet range:

• passing the vpc_id and cidr_block

gateway.tf creates a gateway for the vpc:

• calling only the vpc_id

route_table.tf file directs network traffic:

your either your network or vpc has to be associated with the route_table

• specify the block and the gateway_id defined earlier

route_table_association.tf file creates association between the routing_table and subnet:

• pass arguments for subnet_id and route_table_id

key-pair.tf EC2 key pair setup:

control login into instances

• requires an existing key pair, called in the public_key argument

-sg.tf files are the security group setups:

split for each instance created (more modular and readable)

• name and description are custom
• vpc_id needs to be specified (defined in vpc .tf file)
• ingress = open inbound ports
• egress = open outbound ports (premitted by default)

-instance.tf files are the setup for the instances :

split for each VM created (more modular and readable)

• most elements here are either called from other .tf files
• or found somewhere on the web (.eg ami, instance_type)
• or custom (.eg private_id)
• call remote-exec provisioner to ssh in and run commands
  • run commands

We did it !