terraform-aws-elasticache-redis

Terraform module which creates Redis ElastiCache resources on AWS.

Description

Provision ElastiCache_Replication_Group and Parameter Group.

This module provides recommended settings:

• Enable Multi-AZ
• Enable automatic failover
• Enable at-rest encryption
• Enable in-transit encryption
• Enable automated backups

Usage

Minimal

module "elasticache_redis" {
  source                = "git::https://github.com/tmknom/terraform-aws-elasticache-redis.git?ref=tags/2.0.0"
  name                  = "example"
  number_cache_clusters = 2
  node_type             = "cache.m3.medium"

  subnet_ids         = var.subnet_ids
  vpc_id             = var.vpc_id
  source_cidr_blocks = var.source_cidr_blocks
}

Complete

module "elasticache_redis" {
  source                = "git::https://github.com/tmknom/terraform-aws-elasticache-redis.git?ref=tags/2.0.0"
  name                  = "example"
  number_cache_clusters = 2
  node_type             = "cache.m3.medium"

  engine_version             = "5.0.0"
  port                       = 56379
  maintenance_window         = "mon:10:40-mon:11:40"
  snapshot_window            = "09:10-10:10"
  snapshot_retention_limit   = 1
  automatic_failover_enabled = false
  at_rest_encryption_enabled = false
  transit_encryption_enabled = false
  apply_immediately          = true
  family                     = "redis5.0"
  description                = "This is example"

  subnet_ids         = var.subnet_ids
  vpc_id             = var.vpc_id
  source_cidr_blocks = var.source_cidr_blocks

  tags = {
    Environment = "prod"
  }
}

Examples

• Minimal
• Complete

Requirements

Name	Version
terraform	>= 0.12

Providers

Name	Version
aws	n/a

Inputs

Name	Description	Type	Default	Required
name	The replication group identifier. This parameter is stored as a lowercase string.	string	n/a	yes
node_type	The compute and memory capacity of the nodes in the node group.	string	n/a	yes
number_cache_clusters	The number of cache clusters (primary and replicas) this replication group will have.	string	n/a	yes
source_cidr_blocks	List of source CIDR blocks.	list(string)	n/a	yes
subnet_ids	List of VPC Subnet IDs for the cache subnet group.	list(string)	n/a	yes
vpc_id	VPC Id to associate with Redis ElastiCache.	string	n/a	yes
apply_immediately	Specifies whether any modifications are applied immediately, or during the next maintenance window.	bool	false	no
at_rest_encryption_enabled	Whether to enable encryption at rest.	bool	true	no
automatic_failover_enabled	Specifies whether a read-only replica will be automatically promoted to read/write primary if the existing primary fails.	bool	true	no
description	The description of the all resources.	string	"Managed by Terraform"	no
engine_version	The version number of the cache engine to be used for the cache clusters in this replication group.	string	"5.0.6"	no
family	The family of the ElastiCache parameter group.	string	"redis5.0"	no
maintenance_window	Specifies the weekly time range for when maintenance on the cache cluster is performed.	string	""	no
port	The port number on which each of the cache nodes will accept connections.	number	6379	no
snapshot_retention_limit	The number of days for which ElastiCache will retain automatic cache cluster snapshots before deleting them.	number	30	no
snapshot_window	The daily time range (in UTC) during which ElastiCache will begin taking a daily snapshot of your cache cluster.	string	""	no
tags	A mapping of tags to assign to all resources.	map(string)	{}	no
transit_encryption_enabled	Whether to enable encryption in transit.	bool	true	no

Outputs

Name	Description
elasticache_parameter_group_id	The ElastiCache parameter group name.
elasticache_replication_group_id	The ID of the ElastiCache Replication Group.
elasticache_replication_group_member_clusters	The identifiers of all the nodes that are part of this replication group.
elasticache_replication_group_primary_endpoint_address	The address of the endpoint for the primary node in the replication group.
security_group_arn	The ARN of the Redis ElastiCache security group.
security_group_description	The description of the Redis ElastiCache security group.
security_group_egress	The egress rules of the Redis ElastiCache security group.
security_group_id	The ID of the Redis ElastiCache security group.
security_group_ingress	The ingress rules of the Redis ElastiCache security group.
security_group_name	The name of the Redis ElastiCache security group.
security_group_owner_id	The owner ID of the Redis ElastiCache security group.
security_group_vpc_id	The VPC ID of the Redis ElastiCache security group.

Development

Development Requirements

• Docker

Configure environment variables

export AWS_ACCESS_KEY_ID=AKIAIOSFODNN7EXAMPLE
export AWS_SECRET_ACCESS_KEY=wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY
export AWS_DEFAULT_REGION=ap-northeast-1

Installation

git clone git@github.com:tmknom/terraform-aws-elasticache-redis.git
cd terraform-aws-elasticache-redis
make install

Makefile targets

apply-complete                 Run terraform apply examples/complete
apply-minimal                  Run terraform apply examples/minimal
bump-version                   Bump version (Required argument 'VERSION')
check-format                   Check format code
clean                          Clean .terraform
destroy-complete               Run terraform destroy examples/complete
destroy-minimal                Run terraform destroy examples/minimal
diff                           Word diff
docs                           Generate docs
format                         Format code
help                           Show help
install                        Install requirements
lint                           Lint code
plan-complete                  Run terraform plan examples/complete
plan-minimal                   Run terraform plan examples/minimal
release                        Release GitHub and Terraform Module Registry
upgrade                        Upgrade makefile

Releasing new versions

Bump VERSION file, and run make release.

Terraform Module Registry

• https://registry.terraform.io/modules/tmknom/elasticache-redis/aws

License

Apache 2 Licensed. See LICENSE for full details.