Terraform module to provision an Amazon DocumentDB cluster.
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module "documentdb_cluster" {
source = "cloudposse/documentdb-cluster/aws"
# Cloud Posse recommends pinning every module to a specific version
# version = "x.x.x"
namespace = "eg"
stage = "testing"
name = "docdb"
cluster_size = 3
master_username = "admin1"
master_password = "Test123456789"
instance_class = "db.r4.large"
vpc_id = "vpc-xxxxxxxx"
subnet_ids = ["subnet-xxxxxxxx", "subnet-yyyyyyyy"]
allowed_security_groups = ["sg-xxxxxxxx"]
zone_id = "Zxxxxxxxx"
}Important
In Cloud Posse's examples, we avoid pinning modules to specific versions to prevent discrepancies between the documentation and the latest released versions. However, for your own projects, we strongly advise pinning each module to the exact version you're using. This practice ensures the stability of your infrastructure. Additionally, we recommend implementing a systematic approach for updating versions to avoid unexpected changes.
| Name | Version |
|---|---|
| terraform | >= 1.3 |
| aws | >= 5.29.0 |
| local | >= 1.3 |
| random | >= 1.0 |
| Name | Version |
|---|---|
| aws | >= 5.29.0 |
| random |
| Name | Source | Version |
|---|---|---|
| dns_master | cloudposse/route53-cluster-hostname/aws | 0.13.0 |
| dns_replicas | cloudposse/route53-cluster-hostname/aws | 0.13.0 |
| ssm_write_db_password | cloudposse/ssm-parameter-store/aws | 0.13.0 |
| this | cloudposse/label/null | 0.25.0 |
| Name | Type |
|---|---|
| aws_docdb_cluster.default | resource |
| aws_docdb_cluster_instance.default | resource |
| aws_docdb_cluster_parameter_group.default | resource |
| aws_docdb_subnet_group.default | resource |
| aws_security_group.default | resource |
| aws_security_group_rule.allow_ingress_from_self | resource |
| aws_security_group_rule.egress | resource |
| aws_security_group_rule.ingress_cidr_blocks | resource |
| aws_security_group_rule.ingress_security_groups | resource |
| random_password.password | resource |
| Name | Description | Type | Default | Required |
|---|---|---|---|---|
| additional_tag_map | Additional key-value pairs to add to each map in tags_as_list_of_maps. Not added to tags or id.This is for some rare cases where resources want additional configuration of tags and therefore take a list of maps with tag key, value, and additional configuration. |
map(string) |
{} |
no |
| allow_ingress_from_self | Adds the Document DB security group itself as a source for ingress rules. Useful when this security group will be shared with applications. | bool |
false |
no |
| allow_major_version_upgrade | Specifies whether major version upgrades are allowed. See https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/docdb_cluster#allow_major_version_upgrade | bool |
false |
no |
| allowed_cidr_blocks | List of CIDR blocks to be allowed to connect to the DocumentDB cluster | list(string) |
[] |
no |
| allowed_egress_cidr_blocks | List of CIDR blocks to be allowed to send traffic outside of the DocumentDB cluster | list(string) |
[ |
no |
| allowed_security_groups | List of existing Security Groups to be allowed to connect to the DocumentDB cluster | list(string) |
[] |
no |
| apply_immediately | Specifies whether any cluster modifications are applied immediately, or during the next maintenance window | bool |
true |
no |
| attributes | ID element. Additional attributes (e.g. workers or cluster) to add to id,in the order they appear in the list. New attributes are appended to the end of the list. The elements of the list are joined by the delimiterand treated as a single ID element. |
list(string) |
[] |
no |
| auto_minor_version_upgrade | Specifies whether any minor engine upgrades will be applied automatically to the DB instance during the maintenance window or not | bool |
true |
no |
| ca_cert_identifier | The identifier of the CA certificate for the DB instance | string |
null |
no |
| cluster_dns_name | Name of the cluster CNAME record to create in the parent DNS zone specified by zone_id. If left empty, the name will be auto-asigned using the format master.var.name |
string |
"" |
no |
| cluster_family | The family of the DocumentDB cluster parameter group. For more details, see https://docs.aws.amazon.com/documentdb/latest/developerguide/db-cluster-parameter-group-create.html | string |
"docdb3.6" |
no |
| cluster_parameters | List of DB parameters to apply | list(object({ |
[] |
no |
| cluster_size | Number of DB instances to create in the cluster | number |
3 |
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. |
any |
{ |
no |
| db_port | DocumentDB port | number |
27017 |
no |
| deletion_protection | A value that indicates whether the DB cluster has deletion protection enabled | bool |
false |
no |
| delimiter | Delimiter to be used between ID elements. Defaults to - (hyphen). Set to "" to use no delimiter at all. |
string |
null |
no |
| descriptor_formats | Describe additional descriptors to be output in the descriptors output map.Map of maps. Keys are names of descriptors. Values are maps of the form {<br/> format = string<br/> labels = list(string)<br/>}(Type is any so the map values can later be enhanced to provide additional options.)format is a Terraform format string to be passed to the format() function.labels is a list of labels, in order, to pass to format() function.Label values will be normalized before being passed to format() so they will beidentical to how they appear in id.Default is {} (descriptors output will be empty). |
any |
{} |
no |
| egress_from_port | [from_port]DocumentDB initial port range for egress (e.g. 0) |
number |
0 |
no |
| egress_protocol | DocumentDB protocol for egress (e.g. -1, tcp) |
string |
"-1" |
no |
| egress_to_port | [to_port]DocumentDB initial port range for egress (e.g. 65535) |
number |
0 |
no |
| enable_performance_insights | Specifies whether to enable Performance Insights for the DB Instance. | bool |
false |
no |
| enabled | Set to false to prevent the module from creating any resources | bool |
null |
no |
| enabled_cloudwatch_logs_exports | List of log types to export to cloudwatch. The following log types are supported: audit, profiler |
list(string) |
[] |
no |
| engine | The name of the database engine to be used for this DB cluster. Defaults to docdb. Valid values: docdb |
string |
"docdb" |
no |
| engine_version | The version number of the database engine to use | string |
"3.6.0" |
no |
| environment | ID element. Usually used for region e.g. 'uw2', 'us-west-2', OR role 'prod', 'staging', 'dev', 'UAT' | string |
null |
no |
| external_security_group_id_list | List of external security group IDs to attach to the Document DB | list(string) |
[] |
no |
| id_length_limit | Limit id to this many characters (minimum 6).Set to 0 for unlimited length.Set to null for keep the existing setting, which defaults to 0.Does not affect id_full. |
number |
null |
no |
| instance_class | The instance class to use. For more details, see https://docs.aws.amazon.com/documentdb/latest/developerguide/db-instance-classes.html#db-instance-class-specs | string |
"db.r4.large" |
no |
| kms_key_id | The ARN for the KMS encryption key. When specifying kms_key_id, storage_encrypted needs to be set to true |
string |
"" |
no |
| label_key_case | Controls the letter case of the tags keys (label names) for tags generated by this module.Does not affect keys of tags passed in via the tags input.Possible values: lower, title, upper.Default value: title. |
string |
null |
no |
| label_order | The order in which the labels (ID elements) appear in the id.Defaults to ["namespace", "environment", "stage", "name", "attributes"]. You can omit any of the 6 labels ("tenant" is the 6th), but at least one must be present. |
list(string) |
null |
no |
| label_value_case | Controls the letter case of ID elements (labels) as included in id,set as tag values, and output by this module individually. Does not affect values of tags passed in via the tags input.Possible values: lower, title, upper and none (no transformation).Set this to title and set delimiter to "" to yield Pascal Case IDs.Default value: lower. |
string |
null |
no |
| labels_as_tags | Set of labels (ID elements) to include as tags in the tags output.Default is to include all labels. Tags with empty values will not be included in the tags output.Set to [] to suppress all generated tags.Notes: The value of the name tag, if included, will be the id, not the name.Unlike other null-label inputs, the initial setting of labels_as_tags cannot bechanged in later chained modules. Attempts to change it will be silently ignored. |
set(string) |
[ |
no |
| manage_master_user_password | Whether to manage the master user password using AWS Secrets Manager. | bool |
null |
no |
| master_password | (Required unless a snapshot_identifier is provided) Password for the master DB user. Note that this may show up in logs, and it will be stored in the state file. Please refer to the DocumentDB Naming Constraints | string |
null |
no |
| master_username | (Required unless a snapshot_identifier is provided) Username for the master DB user | string |
"admin1" |
no |
| name | ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'. This is the only ID element not also included as a tag.The "name" tag is set to the full id string. There is no tag with the value of the name input. |
string |
null |
no |
| namespace | ID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally unique | string |
null |
no |
| preferred_backup_window | Daily time range during which the backups happen | string |
"07:00-09:00" |
no |
| preferred_maintenance_window | The window to perform maintenance in. Syntax: ddd:hh24:mi-ddd:hh24:mi. |
string |
"Mon:22:00-Mon:23:00" |
no |
| reader_dns_name | Name of the reader endpoint CNAME record to create in the parent DNS zone specified by zone_id. If left empty, the name will be auto-asigned using the format replicas.var.name |
string |
"" |
no |
| regex_replace_chars | Terraform regular expression (regex) string. Characters matching the regex will be removed from the ID elements. If not set, "/[^a-zA-Z0-9-]/" is used to remove all characters other than hyphens, letters and digits. |
string |
null |
no |
| retention_period | Number of days to retain backups for | number |
5 |
no |
| skip_final_snapshot | Determines whether a final DB snapshot is created before the DB cluster is deleted | bool |
true |
no |
| snapshot_identifier | Specifies whether or not to create this cluster from a snapshot. You can use either the name or ARN when specifying a DB cluster snapshot, or the ARN when specifying a DB snapshot | string |
"" |
no |
| ssm_parameter_enabled | Whether an SSM parameter store value is created to store the database password. | bool |
false |
no |
| ssm_parameter_path_prefix | The path prefix for the created SSM parameter e.g. '/docdb/master-password/dev'. ssm_parameter_enabled must be set to true for this to take affect. |
string |
"/docdb/master-password/" |
no |
| stage | ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release' | string |
null |
no |
| storage_encrypted | Specifies whether the DB cluster is encrypted | bool |
true |
no |
| storage_type | The storage type to associate with the DB cluster. Valid values: standard, iopt1 | string |
"standard" |
no |
| subnet_ids | List of VPC subnet IDs to place DocumentDB instances in | list(string) |
n/a | yes |
| tags | Additional tags (e.g. {'BusinessUnit': 'XYZ'}).Neither the tag keys nor the tag values will be modified by this module. |
map(string) |
{} |
no |
| tenant | ID element _(Rarely used, not included by default)_. A customer identifier, indicating who this instance of a resource is for | string |
null |
no |
| vpc_id | VPC ID to create the cluster in (e.g. vpc-a22222ee) |
string |
n/a | yes |
| zone_id | Route53 parent zone ID. If provided (not empty), the module will create sub-domain DNS records for the DocumentDB master and replicas | string |
"" |
no |
| Name | Description |
|---|---|
| arn | Amazon Resource Name (ARN) of the cluster |
| cluster_members | List of DocumentDB Instances that are a part of this cluster |
| cluster_name | Cluster Identifier |
| endpoint | Endpoint of the DocumentDB cluster |
| master_host | DB master hostname |
| master_password | Password for the master DB user. If manage_master_user_password is set to true, this will be set to null. |
| master_username | Username for the master DB user |
| reader_endpoint | A read-only endpoint of the DocumentDB cluster, automatically load-balanced across replicas |
| replicas_host | DB replicas hostname |
| security_group_arn | ARN of the DocumentDB cluster Security Group |
| security_group_id | ID of the DocumentDB cluster Security Group |
| security_group_name | Name of the DocumentDB cluster Security Group |
Check out these related projects.
- terraform-aws-rds - Terraform module to provision AWS RDS instances for MySQL or Postgres
- terraform-aws-rds-cluster - Terraform module to provision an RDS Aurora cluster for MySQL or Postgres
- terraform-aws-rds-cloudwatch-sns-alarms - Terraform module that configures important RDS alerts using CloudWatch and sends them to an SNS topic
For additional context, refer to some of these links.
- Creating an Amazon DocumentDB Cluster - official AWS documentation on how to create a DocumentDB cluster
- Amazon DocumentDB Instance Class Specifications - provides details of the Amazon DocumentDB instance classes
- Creating an Amazon DocumentDB Cluster Parameter Group - official AWS documentation on how to create an Amazon DocumentDB Cluster Parameter Group
- Amazon DocumentDB Limits - describes the resource limits and naming constraints for Amazon DocumentDB
- Understanding Amazon DocumentDB Amazon Resource Names (ARNs) - describes ARN formats for DocumentDB resources
- Amazon DocumentDB Parameters - lists all the parameters that are specific to a DocumentDB cluster
- Tagging Amazon DocumentDB Resources - describes how to use tags to add metadata to DocumentDB resources
- Amazon DocumentDB FAQs - DocumentDB frequently asked questions
- Troubleshooting Amazon DocumentDB - provides information about how to troubleshoot problems that you might encounter when using Amazon DocumentDB
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