RDS PostgresQL

SquareOps Technologies Your DevOps Partner for Accelerating cloud journey.

This Terraform module provisions an Amazon RDS PostgreSQL database on AWS. Amazon RDS (Relational Database Service) is a managed database service that makes it easy to set up, operate, and scale a relational database in the cloud. This module focuses specifically on PostgreSQL database deployments.

Features

Creates an Amazon RDS PostgreSQL database with customizable configurations.
Supports various PostgreSQL versions and allows for easy updates.
Configurable database instance class, storage capacity, and other PostgreSQL-specific settings.
Provides options for enabling multi-AZ deployment for enhanced availability and disaster recovery.
Allows customization of backup retention period and automated backups.
Supports encryption at rest using AWS Key Management Service (KMS) for enhanced security.
Enables fine-grained control over network access through security groups and VPC settings.
Offers customizable tags for resource categorization and management.
CloudWatch Alerts: Set up CloudWatch alarms to monitor the health and performance of your Redis cluster. Integrate these alarms with AWS Simple Notification Service (SNS) to receive real-time alerts. Use AWS Lambda functions to customize your alerting logic, and send notifications to Slack channels for immediate visibility into your RDS POstgresql status.
Supports useful features to enable storage autoscaling and Replica configuration with desired number of replicas.

Usage Examples

module "rds-pg" {
  source                           = "squareops/rds-postgresql/aws"
  name                             = "postgresql"
  db_name                          = "proddb"
  vpc_id                           = "vpc-047eb8acfb73"
  multi_az                         = "true"
  subnet_ids                       = ["subnet-b39cfc", "subnet-090b8d8"]
  environment                      = "prod"
  storage_type                     = "gp3"
  replica_enable                   = false
  replica_count                    = 1
  kms_key_arn                      = "arn:aws:kms:region:2222222222:key/f8c8d802-a34b"
  storage_type                     = "gp3"
  engine_version                   = "15.2"
  instance_class                   = "db.m5.large"
  master_username                  = "pguser"
  allocated_storage                = "20"
  publicly_accessible              = false
  skip_final_snapshot              = true
  backup_window                    = "03:00-06:00"
  maintenance_window               = "Mon:00:00-Mon:03:00"
  major_engine_version             = "15.2"
  deletion_protection              = false
  allowed_security_groups          = ["sg-013cbf880"]
  final_snapshot_identifier_prefix = "final"
  cloudwatch_metric_alarms_enabled = true
  alarm_cpu_threshold_percent      = 70
  disk_free_storage_space          = "10000000" # in bytes
  slack_username                   = "John"
  slack_channel                    = "skaf-dev"
  slack_webhook_url                = "https://hooks/xxxxxxxx"
}

Refer examples for more details.

IAM Permissions

The required IAM permissions to create resources from this module can be found here

Requirements

Name	Version
terraform	>= 0.13
aws	5.13.1

Providers

Name	Version
archive	2.4.0
aws	5.13.1
random	3.5.1

Modules

Name	Source	Version
cw_sns_slack	./lambda	n/a
db	terraform-aws-modules/rds/aws	6.1.0
db_replica	terraform-aws-modules/rds/aws	6.1.0
security_group_rds	terraform-aws-modules/security-group/aws	~> 4

Resources

Name	Type
aws_cloudwatch_metric_alarm.cache_cpu	resource
aws_cloudwatch_metric_alarm.disk_free_storage_space_too_low	resource
aws_kms_ciphertext.slack_url	resource
aws_kms_key.this	resource
aws_lambda_permission.sns_lambda_slack_invoke	resource
aws_secretsmanager_secret.secret_master_db	resource
aws_secretsmanager_secret_version.rds_credentials	resource
aws_security_group_rule.cidr_ingress	resource
aws_security_group_rule.default_ingress	resource
aws_sns_topic.slack_topic	resource
aws_sns_topic_subscription.slack-endpoint	resource
random_password.master	resource
archive_file.lambdazip	data source
aws_availability_zones.available	data source
aws_region.current	data source

Inputs

Name	Description	Type	Default	Required
additional_tags	A map of additional tags to apply to the AWS resources	`map(string)`	{ "automation": "true" }	no
alarm_actions	Alarm action list	`list(string)`	`[]`	no
alarm_cpu_threshold_percent	CPU threshold alarm level	`number`	`75`	no
allocated_storage	The allocated storage capacity for the database in gibibytes (GiB)	`number`	`20`	no
allowed_cidr_blocks	A list of CIDR blocks that are allowed to access the database	`list(any)`	`[]`	no
allowed_security_groups	A list of Security Group IDs to allow access to the database	`list(any)`	`[]`	no
apply_immediately	Specifies whether any cluster modifications are applied immediately or during the next maintenance window	`bool`	`false`	no
backup_retention_period	The number of days to retain backups for	`number`	`5`	no
backup_window	The preferred window for taking automated backups of the database	`string`	`"03:00-06:00"`	no
cloudwatch_metric_alarms_enabled	Boolean flag to enable/disable CloudWatch metrics alarms	`bool`	`false`	no
create_db_subnet_group	Whether to create a database subnet group	`bool`	`true`	no
create_security_group	Whether to create a security group for the database	`bool`	`true`	no
cw_sns_topic_arn	The username to use when sending notifications to Slack.	`string`	`""`	no
db_name	The name of the automatically created database on cluster creation	`string`	`""`	no
deletion_protection	Specifies whether accidental deletion protection is enabled	`bool`	`true`	no
disk_free_storage_space	Alarm threshold for the 'lowFreeStorageSpace' alarm	`string`	`"10000000000"`	no
enable_ssl_connection	Whether to enable SSL connection to the database	`bool`	`false`	no
enable_storage_autoscaling	Whether enable storage autoscaling or not	`bool`	`true`	no
engine	The name of the database engine to be used for this DB cluster	`string`	`"postgres"`	no
engine_version	The database engine version. Updating this argument results in an outage	`string`	`""`	no
environment	Select enviroment type: dev, demo, prod	`string`	`""`	no
family	The version of the Postgresql DB family being created	`string`	`"postgres15"`	no
final_snapshot_identifier_prefix	The prefix name for the final snapshot on cluster destroy	`string`	`"final"`	no
instance_class	The instance type for the database	`string`	`"db.m5.large"`	no
kms_key_arn	The ARN for the KMS encryption key. Set this to the destination KMS ARN when creating an encrypted replica. If storage_encrypted is set to true and kms_key_id is not specified, the default KMS key created in your account will be used	`string`	`null`	no
maintenance_window	The preferred window for performing database maintenance	`string`	`"Mon:00:00-Mon:03:00"`	no
major_engine_version	The major engine version for the database. Updating this argument results in an outage	`string`	`""`	no
manage_master_user_password	Whether to manage the master user password of the RDS primary cluster automatically	`bool`	`false`	no
master_username	The username for the RDS primary cluster	`string`	`""`	no
max_allocated_storage	The Maximum storage capacity for the database value after autoscaling	`number`	`null`	no
multi_az	Enable multi-AZ for disaster recovery	`bool`	`false`	no
name	The name of the RDS instance	`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
performance_insights_enabled	Specifies whether Performance Insights are enabled	`bool`	`false`	no
performance_insights_retention_period	The amount of time in days to retain Performance Insights data. Valid values are `7`, `731` (2 years) or a multiple of `31`	`number`	`7`	no
port	The port number for the database	`number`	`5432`	no
publicly_accessible	Specifies whether the RDS instance is publicly accessible over the internet	`bool`	`false`	no
random_password_length	The length of the randomly generated password for the RDS primary cluster (default: 16)	`number`	`16`	no
replica_count	The number of replica instance	`number`	`1`	no
replica_enable	Whether enable replica DB	`bool`	`false`	no
replicate_source_db	Specifies that this resource is a replicate database, and uses the specified value as the source database identifier	`string`	`null`	no
skip_final_snapshot	Determines whether a final DB snapshot is created before the DB instance is deleted. If set to true, no DB snapshot is created. If set to false, a DB snapshot is created before the DB instance is deleted, using the value from final_snapshot_identifier	`bool`	`true`	no
slack_channel	The Slack channel where notifications will be posted.	`string`	`""`	no
slack_username	The username to use when sending notifications to Slack.	`string`	`""`	no
slack_webhook_url	The Slack Webhook URL where notifications will be sent.	`string`	`""`	no
snapshot_identifier	Specifies whether to create the database from a snapshot. Use the snapshot ID found in the RDS console, e.g., rds:production-2015-06-26-06-05	`string`	`null`	no
storage_encrypted	Specifies whether to enable database encryption	`bool`	`true`	no
storage_type	The storage type for the database storage like gp2,gp3,io1	`string`	`"gp2"`	no
subnet_ids	A list of subnet IDs used by the database subnet group	`list(any)`	`[]`	no
vpc_id	The ID of the VPC where the RDS cluster will be deployed	`string`	`""`	no

Outputs

Name	Description
db_instance_endpoint	Connection endpoint of the RDS instance.
db_instance_name	Name of the database instance
db_instance_password	Password for accessing the database.
db_instance_username	Master username for accessing the database.
db_parameter_group_id	ID of the parameter group associated with the RDS instance.
db_subnet_group_id	ID of the subnet group associated with the RDS instance.
master_credential_secret_arn	The ARN of the master user secret (Only available when manage_master_user_password is set to true)
rds_dedicated_security_group	ID of the security group associated with the RDS instance.
replica_db_instance_endpoint	Connection endpoint of the RDS instance.
replica_db_instance_name	Name of the replica database s

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License

Apache License, Version 2.0, January 2004 (https://www.apache.org/licenses/LICENSE-2.0)

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