Terraform module to provision an ElastiCache Redis Cluster
This project is part of our comprehensive "SweetOps" approach towards DevOps.
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: We do not pin modules to versions in our examples because of the difficulty of keeping the versions in the documentation in sync with the latest released versions. We highly recommend that in your code you pin the version to the exact version you are using so that your infrastructure remains stable, and update versions in a systematic way so that they do not catch you by surprise.
Also, because of a bug in the Terraform registry (hashicorp/terraform#21417), the registry shows many of our inputs as required when in fact they are optional. The table below correctly indicates which inputs are required.
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 = "cloudposse/vpc/aws"
# Cloud Posse recommends pinning every module to a specific version
# version = "x.x.x"
namespace = var.namespace
stage = var.stage
name = var.name
cidr_block = "172.16.0.0/16"
}
module "subnets" {
source = "cloudposse/dynamic-subnets/aws"
# Cloud Posse recommends pinning every module to a specific version
# version = "x.x.x"
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 = "cloudposse/elasticache-redis/aws"
# Cloud Posse recommends pinning every module to a specific version
# version = "x.x.x"
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_enabled = 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:
help Help screen
help/all Display help for all targets
help/short This help short screen
lint Lint terraform code
| Name | Version |
|---|---|
| terraform | >= 0.12.26 |
| aws | >= 2.0 |
| null | >= 2.0 |
| Name | Version |
|---|---|
| aws | >= 2.0 |
| Name | Description | Type | Default | Required |
|---|---|---|---|---|
| additional_tag_map | Additional tags for appending to tags_as_list_of_maps. Not added to tags. |
map(string) |
{} |
no |
| alarm_actions | Alarm action list | list(string) |
[] |
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) |
[] |
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) |
[] |
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) |
[] |
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) |
[] |
no |
| cloudwatch_metric_alarms_enabled | Boolean flag to enable/disable CloudWatch metrics alarms | bool |
false |
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 |
| context | Single object for setting entire context at once. See description of individual variables for details. Leave string and numeric variables as null to use default value.Individual variable settings (non-null) override settings in context object, except for attributes, tags, and additional_tag_map, which are merged. |
object({ |
{ |
no |
| delimiter | Delimiter to be used between namespace, environment, stage, name and attributes.Defaults to - (hyphen). Set to "" to use no delimiter at all. |
string |
null |
no |
| dns_subdomain | The subdomain to use for the CNAME record. If not provided then the CNAME record will use var.name. | string |
"" |
no |
| egress_cidr_blocks | Outbound traffic address | list |
[ |
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 |
null |
no |
| engine_version | Redis engine version | string |
"4.0.10" |
no |
| environment | Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT' | string |
null |
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) |
[] |
no |
| family | Redis family | string |
"redis4.0" |
no |
| id_length_limit | Limit id to this many characters.Set to 0 for unlimited length.Set to null for default, which is 0.Does not affect id_full. |
number |
null |
no |
| instance_type | Elastic cache instance type | string |
"cache.t2.micro" |
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. at_rest_encryption_enabled must be set to true |
string |
null |
no |
| label_order | The naming order of the id output and Name tag. Defaults to ["namespace", "environment", "stage", "name", "attributes"]. You can omit any of the 5 elements, but at least one must be present. |
list(string) |
null |
no |
| maintenance_window | Maintenance window | string |
"wed:03:00-wed:04:00" |
no |
| name | Solution name, e.g. 'app' or 'jenkins' | string |
null |
no |
| namespace | Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp' | string |
null |
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) |
[] |
no |
| parameter | A list of Redis parameters to apply. Note that parameters may differ from one Redis family to another | list(object({ |
[] |
no |
| port | Redis port | number |
6379 |
no |
| regex_replace_chars | Regex to replace chars with empty string in namespace, environment, stage and name.If not set, "/[^a-zA-Z0-9-]/" is used to remove all characters other than hyphens, letters and digits. |
string |
null |
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_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 |
null |
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', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release' | string |
null |
no |
| subnets | Subnet IDs | list(string) |
[] |
no |
| tags | Additional tags (e.g. map('BusinessUnit','XYZ') |
map(string) |
{} |
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 |
n/a | 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 |
Got a question? We got answers.
File a GitHub issue, send us an email or join our Slack Community.
We are a DevOps Accelerator. We'll help you build your cloud infrastructure from the ground up so you can own it. Then we'll show you how to operate it and stick around for as long as you need us.
Work directly with our team of DevOps experts via email, slack, and video conferencing.
We deliver 10x the value for a fraction of the cost of a full-time engineer. Our track record is not even funny. If you want things done right and you need it done FAST, then we're your best bet.
- Reference Architecture. You'll get everything you need from the ground up built using 100% infrastructure as code.
- Release Engineering. You'll have end-to-end CI/CD with unlimited staging environments.
- Site Reliability Engineering. You'll have total visibility into your apps and microservices.
- Security Baseline. You'll have built-in governance with accountability and audit logs for all changes.
- GitOps. You'll be able to operate your infrastructure via Pull Requests.
- Training. You'll receive hands-on training so your team can operate what we build.
- Questions. You'll have a direct line of communication between our teams via a Shared Slack channel.
- Troubleshooting. You'll get help to triage when things aren't working.
- Code Reviews. You'll receive constructive feedback on Pull Requests.
- Bug Fixes. We'll rapidly work with you to fix any bugs in our projects.
Join our Open Source Community on Slack. It's FREE for everyone! Our "SweetOps" community is where you get to talk with others who share a similar vision for how to rollout and manage infrastructure. This is the best place to talk shop, ask questions, solicit feedback, and work together as a community to build totally sweet infrastructure.
Participate in our Discourse Forums. Here you'll find answers to commonly asked questions. Most questions will be related to the enormous number of projects we support on our GitHub. Come here to collaborate on answers, find solutions, and get ideas about the products and services we value. It only takes a minute to get started! Just sign in with SSO using your GitHub account.
Sign up for our newsletter that covers everything on our technology radar. Receive updates on what we're up to on GitHub as well as awesome new projects we discover.
Join us every Wednesday via Zoom for our weekly "Lunch & Learn" sessions. It's FREE for everyone!
Please use the issue tracker to report any bugs or file feature requests.
If you are interested in being a contributor and want to get involved in developing this project or help out with our other projects, we would love to hear from you! Shoot us an email.
In general, PRs are welcome. We follow the typical "fork-and-pull" Git workflow.
- Fork the repo on GitHub
- Clone the project to your own machine
- Commit changes to your own branch
- Push your work back up to your fork
- Submit a Pull Request so that we can review your changes
NOTE: Be sure to merge the latest changes from "upstream" before making a pull request!
Copyright © 2017-2021 Cloud Posse, LLC
See LICENSE for full details.
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements. See the NOTICE file
distributed with this work for additional information
regarding copyright ownership. The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License. You may obtain a copy of the License at
https://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied. See the License for the
specific language governing permissions and limitations
under the License.
All other trademarks referenced herein are the property of their respective owners.
This project is maintained and funded by Cloud Posse, LLC. Like it? Please let us know by leaving a testimonial!
We're a DevOps Professional Services company based in Los Angeles, CA. We ❤️ Open Source Software.
We offer paid support on all of our projects.
Check out our other projects, follow us on twitter, apply for a job, or hire us to help with your cloud strategy and implementation.
 Erik Osterman |
 Igor Rodionov |
 Andriy Knysh |
 Daren Desjardins |
 Max Moon |
 Christopher Riley |
|---|