Terraform module: AWS ELB

This Terraform module creates an ELB with optionally a public and/or private Route53 DNS record attached to it. Additionally it provides the option to attach the created ELB to an autoscaling group by name.

Usage

module "elb" {
  source  = "github.com/cytopia/terraform-aws-elb?ref=v0.1.0"

  name       = "my-elb"
  vpc_id     = "vpc-12345"
  subnet_ids = ["subnet-1234", "subnet-5677"]

  # Attach the ELB to an ASG by this name
  asg_name = "my-service"

  # Listener
  lb_port       = "443"
  instance_port = "80"

  # Security
  inbound_cidr_blocks = ["0.0.0.0/0"]

  # Create this route53 public DNS record
  route53_public_dns_name = "my-service.example.com"
}

Examples

• Complete ELB

Inputs

Name	Description	Type	Default	Required
enable	Whether or not to enable this module. This is required due to the lack of using count for modules. Set it to false to disable the creation of the ELB. Defaults to true	string	"true"	no
vpc_id	ID of the VPC to add this ELB to.	string	n/a	yes
subnet_ids	List of subnet ids to place the ELB into.	list	n/a	yes
asg_name	Name of the auto scaling group to attach to. If this value is empty, no attachment will be done and is be left to the end-user via custom 'aws_autoscaling_group' or 'aws_autoscaling_attachment' definitions.	string	""	no
inbound_cidr_blocks	List of CIDR's that are allowed to access the ELB.	list	n/a	yes
internal	If true, ELB will be an internal ELB.	string	"false"	no
cross_zone_load_balancing	Enable cross-zone load balancing.	string	"true"	no
idle_timeout	The time in seconds that the connection is allowed to be idle.	string	"60"	no
connection_draining	Boolean to enable connection draining.	string	"false"	no
connection_draining_timeout	The time in seconds to allow for connections to drain	string	"300"	no
lb_port	On what port do you want to access the ELB.	string	n/a	yes
instance_port	On what port does the ELB access the instances.	string	n/a	yes
lb_protocol	On what protocol should the load balancer respond.	string	"TCP"	no
instance_protocol	On what protocol does the instance respond.	string	"TCP"	no
healthy_threshold	The number of checks before the instance is declared healthy.	string	"10"	no
unhealthy_threshold	The number of checks before the instance is declared unhealthy.	string	"2"	no
target	The target of the check. If unset, will default to 'instance_protocol:instance_port' for TCP/SLL and 'instance_protocol:instance_port/' for HTTP/HTTPS.	string	""	no
interval	The interval between checks.	string	"30"	no
timeout	The length of time before the check times out.	string	"5"	no
name	Name of the ELB and security group resources.	string	n/a	yes
tags	Tags to apply to all resources.	map	<map>	no
sg_name_suffix_elb	Name suffix to append to the ELB security group.	string	"-elb"	no
route53_public_dns_name	If set, the ELB will be assigned this public DNS name via Route53.	string	""	no
route53_private_dns_name	If set, the ELB will be assigned this private DNS name via Route53.	string	""	no
public_dns_evaluate_target_health	Set to true if you want Route 53 to determine whether to respond to DNS queries using this resource record set by checking the health of the resource record set.	string	"true"	no
private_dns_evaluate_target_health	Set to true if you want Route 53 to determine whether to respond to DNS queries using this resource record set by checking the health of the resource record set.	string	"true"	no

Outputs

Name	Description
security_group_id	The ID of the ELB security group to attach the the LC/ASG/EC2 instance in order to be accessable by the ELB.
id	The name of the ELB
name	The name of the ELB
fqdn	The auto-generated FQDN of the ELB.
route53_public_dns_name	The route53 public dns name of the ELB if set.
route53_private_dns_name	The route53 private dns name of the ELB if set.

Authors

Module managed by cytopia.

License

MIT License

Copyright (c) 2018 cytopia