Terraform module to provision an ElastiCache Redis Cluster
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It's 100% Open Source and licensed under the APACHE2.
We literally have hundreds of terraform modules that are Open Source and well-maintained. Check them out!
IMPORTANT: The master branch is used in source just as an example. In your code, do not pin to master because there may be breaking changes between releases.
Instead pin to the release tag (e.g. ?ref=tags/x.y.z) of one of our latest releases.
For a complete example, see examples/complete.
For automated tests of the complete example using bats and Terratest (which tests and deploys the example on AWS), see test.
provider "aws" {
region = var.region
}
module "vpc" {
source = "git::https://github.com/cloudposse/terraform-aws-vpc.git?ref=tags/0.8.1"
namespace = var.namespace
stage = var.stage
name = var.name
cidr_block = "172.16.0.0/16"
}
module "subnets" {
source = "git::https://github.com/cloudposse/terraform-aws-dynamic-subnets.git?ref=tags/0.18.1"
availability_zones = var.availability_zones
namespace = var.namespace
stage = var.stage
name = var.name
vpc_id = module.vpc.vpc_id
igw_id = module.vpc.igw_id
cidr_block = module.vpc.vpc_cidr_block
nat_gateway_enabled = true
nat_instance_enabled = false
}
module "redis" {
source = "git::https://github.com/cloudposse/terraform-aws-elasticache-redis.git?ref=master"
availability_zones = var.availability_zones
namespace = var.namespace
stage = var.stage
name = var.name
zone_id = var.zone_id
vpc_id = module.vpc.vpc_id
allowed_security_groups = [module.vpc.vpc_default_security_group_id]
subnets = module.subnets.private_subnet_ids
cluster_size = var.cluster_size
instance_type = var.instance_type
apply_immediately = true
automatic_failover = false
engine_version = var.engine_version
family = var.family
at_rest_encryption_enabled = var.at_rest_encryption_enabled
transit_encryption_enabled = var.transit_encryption_enabled
parameter = [
{
name = "notify-keyspace-events"
value = "lK"
}
]
}Review the complete example to see how to use this module.
Available targets:
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| Name | Description | Type | Default | Required |
|---|---|---|---|---|
| alarm_actions | Alarm action list | list(string) | <list> |
no |
| alarm_cpu_threshold_percent | CPU threshold alarm level | number | 75 |
no |
| alarm_memory_threshold_bytes | Ram threshold alarm level | number | 10000000 |
no |
| allowed_cidr_blocks | List of CIDR blocks that are allowed ingress to the cluster's Security Group created in the module | list(string) | <list> |
no |
| allowed_security_groups | List of Security Group IDs that are allowed ingress to the cluster's Security Group created in the module | list(string) | <list> |
no |
| apply_immediately | Apply changes immediately | bool | true |
no |
| at_rest_encryption_enabled | Enable encryption at rest | bool | false |
no |
| attributes | Additional attributes (e.g. "1") | list(string) | <list> |
no |
| auth_token | Auth token for password protecting redis, transit_encryption_enabled must be set to true. Password must be longer than 16 chars |
string | null |
no |
| automatic_failover_enabled | Automatic failover (Not available for T1/T2 instances) | bool | false |
no |
| availability_zones | Availability zone IDs | list(string) | <list> |
no |
| cluster_mode_enabled | Flag to enable/disable creation of a native redis cluster. automatic_failover_enabled must be set to true. Only 1 cluster_mode block is allowed |
bool | false |
no |
| cluster_mode_num_node_groups | Number of node groups (shards) for this Redis replication group. Changing this number will trigger an online resizing operation before other settings modifications | number | 0 |
no |
| cluster_mode_replicas_per_node_group | Number of replica nodes in each node group. Valid values are 0 to 5. Changing this number will force a new resource | number | 0 |
no |
| cluster_size | Number of nodes in cluster. Ignored when cluster_mode_enabled == true |
number | 1 |
no |
| delimiter | Delimiter between name, namespace, stage and attributes |
string | - |
no |
| dns_subdomain | The subdomain to use for the CNAME record. If not provided then the CNAME record will use var.name. | string | `` | no |
| elasticache_subnet_group_name | Subnet group name for the ElastiCache instance | string | `` | no |
| enabled | Set to false to prevent the module from creating any resources | bool | true |
no |
| engine_version | Redis engine version | string | 4.0.10 |
no |
| existing_security_groups | List of existing Security Group IDs to place the cluster into. Set use_existing_security_groups to true to enable using existing_security_groups as Security Groups for the cluster |
list(string) | <list> |
no |
| family | Redis family | string | redis4.0 |
no |
| instance_type | Elastic cache instance type | string | cache.t2.micro |
no |
| maintenance_window | Maintenance window | string | wed:03:00-wed:04:00 |
no |
| name | Name of the application | string | - | yes |
| namespace | Namespace (e.g. eg or cp) |
string | `` | no |
| notification_topic_arn | Notification topic arn | string | `` | no |
| ok_actions | The list of actions to execute when this alarm transitions into an OK state from any other state. Each action is specified as an Amazon Resource Number (ARN) | list(string) | <list> |
no |
| parameter | A list of Redis parameters to apply. Note that parameters may differ from one Redis family to another | object | <list> |
no |
| port | Redis port | number | 6379 |
no |
| replication_group_id | Replication group ID with the following constraints: A name must contain from 1 to 20 alphanumeric characters or hyphens. The first character must be a letter. A name cannot end with a hyphen or contain two consecutive hyphens. | string | `` | no |
| snapshot_retention_limit | The number of days for which ElastiCache will retain automatic cache cluster snapshots before deleting them. | number | 0 |
no |
| snapshot_window | The daily time range (in UTC) during which ElastiCache will begin taking a daily snapshot of your cache cluster. | string | 06:30-07:30 |
no |
| stage | Stage (e.g. prod, dev, staging) |
string | `` | no |
| subnets | Subnet IDs | list(string) | <list> |
no |
| tags | Additional tags (e.g. map("BusinessUnit","ABC") | map(string) | <map> |
no |
| transit_encryption_enabled | Enable TLS | bool | true |
no |
| use_existing_security_groups | Flag to enable/disable creation of Security Group in the module. Set to true to disable Security Group creation and provide a list of existing security Group IDs in existing_security_groups to place the cluster into |
bool | false |
no |
| vpc_id | VPC ID | string | - | yes |
| zone_id | Route53 DNS Zone ID | string | `` | no |
| Name | Description |
|---|---|
| endpoint | Redis primary endpoint |
| host | Redis hostname |
| id | Redis cluster ID |
| port | Redis port |
| security_group_id | Security group ID |
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