A Terraform module to create a Redis ElastiCache cluster

A terraform module providing a Redis ElastiCache cluster in AWS.

This module is forked from tf_aws_elasticache_redis Communitiy module and performs the following tasks:

• Creates Redis ElastiCache clusters
• Creates, manages, and exports a security group

Terraform versions

Terraform 1.3 used in master branch. Check version tags for older versions.

Usage

module "redis" {
  source  = "github.com/flywirecorp/tf_aws_elasticache_redis.git?ref=v3.0.0"

  env            = "dev"
  name           = "thtest"
  redis_clusters = "2"
  redis_failover = "true"
  subnets        = ["subnet-12345678", "subnet-11111111", "subnet-22222222"]
  vpc_id         = "vpc-12345678"

  redis_parameters = [{
    name  = "min-slaves-max-lag"
    value = "5"
  },{
    name  = "min-slaves-to-write"
    value = "1"
  },{
    name  = "databases"
    value = "32"
  }]
}

Requirements

Name	Version
terraform	>= 1.3
aws	~> 5
random	~> 3.5

Providers

Name	Version
aws	~> 5
random	~> 3.5

Modules

No modules.

Resources

Name	Type
aws_elasticache_parameter_group.redis_parameter_group	resource
aws_elasticache_replication_group.redis	resource
aws_elasticache_subnet_group.redis_subnet_group	resource
aws_security_group.redis_security_group	resource
aws_security_group_rule.redis_ingress	resource
aws_security_group_rule.redis_networks_ingress	resource
aws_security_group_rule.redis_replication_egress	resource
random_id.salt	resource
aws_vpc.vpc	data source

Inputs

Name	Description	Type	Default	Required
env	env to deploy into, should typically dev/staging/prod	string	n/a	yes
name	Name for the Redis replication group i.e. UserObject	string	n/a	yes
redis_clusters	Number of Redis cache clusters (nodes) to create	string	n/a	yes
subnets	List of VPC Subnet IDs for the cache subnet group	list(string)	n/a	yes
vpc_id	VPC ID	string	n/a	yes
allowed_cidr	A list of Security Group ID's to allow access to.	list(string)	[ "127.0.0.1/32" ]	no
allowed_security_groups	A list of Security Group ID's to allow access to.	list(string)	[]	no
apply_immediately	Specifies whether any modifications are applied immediately, or during the next maintenance window. Default is false.	bool	false	no
at_rest_encryption_enabled	Whether to enable encryption at rest	bool	false	no
auth_token	The password used to access a password protected server. Can be specified only if transit_encryption_enabled = true. If specified must contain from 16 to 128 alphanumeric characters or symbols	string	null	no
auto_minor_version_upgrade	Specifies whether a minor engine upgrades will be applied automatically to the underlying Cache Cluster instances during the maintenance window	bool	true	no
availability_zones	A list of EC2 availability zones in which the replication group's cache clusters will be created. The order of the availability zones in the list is not important	list(string)	[]	no
is_migration_cluster	Specifies whether this is a cluster for replicating other EC2 redis. Useful for migrations.	bool	false	no
kms_key_id	The ARN of the key that you wish to use if encrypting at rest. If not supplied, uses service managed encryption. Can be specified only if at_rest_encryption_enabled = true	string	""	no
multi_az_enabled	Specifies whether to enable Multi-AZ Support for the replication group	bool	false	no
notification_topic_arn	An Amazon Resource Name (ARN) of an SNS topic to send ElastiCache notifications to. Example: arn:aws:sns:us-east-1:012345678999:my_sns_topic	string	""	no
redis_failover	Specifies whether a read-only replica will be automatically promoted to read/write primary if the existing primary fails	bool	false	no
redis_maintenance_window	Specifies the weekly time range for when maintenance on the cache cluster is performed. The format is ddd:hh24:mi-ddd:hh24:mi (24H Clock UTC). The minimum maintenance window is a 60 minute period	string	"fri:08:00-fri:09:00"	no
redis_node_type	Instance type to use for creating the Redis cache clusters	string	"cache.m3.medium"	no
redis_parameters	additional parameters modifyed in parameter group	list(map(any))	[]	no
redis_port	n/a	number	6379	no
redis_snapshot_retention_limit	The number of days for which ElastiCache will retain automatic cache cluster snapshots before deleting them. For example, if you set SnapshotRetentionLimit to 5, then a snapshot that was taken today will be retained for 5 days before being deleted. If the value of SnapshotRetentionLimit is set to zero (0), backups are turned off. Please note that setting a snapshot_retention_limit is not supported on cache.t1.micro or cache.t2.* cache nodes	number	0	no
redis_snapshot_window	The daily time range (in UTC) during which ElastiCache will begin taking a daily snapshot of your cache cluster. The minimum snapshot window is a 60 minute period	string	"06:30-07:30"	no
redis_version	Redis version to use, defaults to 3.2.10	string	"3.2.10"	no
security_group_names	A list of cache security group names to associate with this replication group	list(string)	[]	no
snapshot_arns	A single-element string list containing an Amazon Resource Name (ARN) of a Redis RDB snapshot file stored in Amazon S3. Example: arn:aws:s3:::my_bucket/snapshot1.rdb	list(string)	[]	no
snapshot_name	The name of a snapshot from which to restore data into the new node group. Changing the snapshot_name forces a new resource	string	""	no
tags	Tags for redis nodes	map(string)	{}	no
transit_encryption_enabled	Whether to enable encryption in transit. Requires 3.2.6 or >=4.0 redis_version	bool	false	no

Outputs

Name	Description
endpoint	Redis endpoint address
id	ID of the Redis replication group
parameter_group	ID of the Parameter Group to control the runtime properties of Redis nodes and clusters
port	Redis port (default is 6379)
redis_security_group_id	ID of the managed Security Group generated for Redis
redis_subnet_group_name	Name of the Redis subnet

Authors

Created by Tim Hartmann. Maintained by Anton Babenko and these awesome contributors.

This fork is possible thanks to these contributors

License

MIT License