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A Terraform module to create an Amazon Web Services (AWS) Redis ElastiCache cluster.

resource "aws_sns_topic" "global" {
 ...
}
resource "aws_elasticache_subnet_group" "redis" {
 ...
}
resource "aws_elasticache_parameter_group" "redis" {
 ...
}
module "cache" {
 source = "github.com/azavea/terraform-aws-redis-elasticache"
 vpc_id = "vpc-20f74844"
 cache_identifier = "cache"
 automatic_failover_enabled = "false"
 desired_clusters = "1"
 instance_type = "cache.t2.micro"
 engine_version = "3.2.4"
 parameter_group = "${aws_elasticache_parameter_group.redis.name}"
 subnet_group = "${aws_elasticache_subnet_group.redis.name}"
 maintenance_window = "sun:02:30-sun:03:30"
 notification_topic_arn = "${aws_sns_topic.global.arn}"
 alarm_cpu_threshold = "75"
 alarm_memory_threshold = "10000000"
 alarm_actions = ["${aws_sns_topic.global.arn}"]
 project = "Unknown"
 environment = "Unknown"
}

• vpc_id - ID of VPC meant to house the cache
• project - Name of the project making use of the cluster (default: Unknown)
• environment - Name of environment the cluster is targeted for (default: Unknown)
• cache_identifier - Name used as ElastiCache cluster ID
• automatic_failover_enabled - Flag to determine if automatic failover should be enabled
• desired_clusters - Number of cache clusters in replication group
• instance_type - Instance type for cache instance (default: cache.t2.micro)
• engine_version - Cache engine version (default: 3.2.4)
• parameter_group - Cache parameter group name (default: redis3.2)
• subnet_group - Cache subnet group name
• maintenance_window - Time window to reserve for maintenance
• notification_topic_arn - ARN to notify when cache events occur
• alarm_cpu_threshold - CPU alarm threshold as a percentage (default: 75)
• alarm_memory_threshold - Free memory alarm threshold in bytes (default: 10000000)
• alarm_actions - ARN to be notified via CloudWatch when alarm thresholds are triggered

• id - The replication group ID
• cache_security_group_id - Security group ID of the cache cluster
• port - Port of replication group leader
• endpoint - Public DNS name of replication group leader