Amazon DocumentDB Construct Library
---AWS CDK v1 has reached End-of-Support on 2023-06-01. This package is no longer being updated, and users should migrate to AWS CDK v2.
For more information on how to migrate, see the Migrating to AWS CDK v2 guide.
Starting a Clustered Database
To set up a clustered DocumentDB database, define a DatabaseCluster
. You must
always launch a database in a VPC. Use the vpcSubnets
attribute to control whether
your instances will be launched privately or publicly:
# vpc: ec2.Vpc
cluster = docdb.DatabaseCluster(self, "Database",
master_user=docdb.Login(
username="myuser", # NOTE: 'admin' is reserved by DocumentDB
exclude_characters=""@/:", # optional, defaults to the set ""@/" and is also used for eventually created rotations
secret_name="/myapp/mydocdb/masteruser"
),
instance_type=ec2.InstanceType.of(ec2.InstanceClass.R5, ec2.InstanceSize.LARGE),
vpc_subnets=ec2.SubnetSelection(
subnet_type=ec2.SubnetType.PUBLIC
),
vpc=vpc
)
By default, the master password will be generated and stored in AWS Secrets Manager with auto-generated description.
Your cluster will be empty by default.
Connecting
To control who can access the cluster, use the .connections
attribute. DocumentDB databases have a default port, so
you don’t need to specify the port:
# cluster: docdb.DatabaseCluster
cluster.connections.allow_default_port_from_any_ipv4("Open to the world")
The endpoints to access your database cluster will be available as the .clusterEndpoint
and .clusterReadEndpoint
attributes:
# cluster: docdb.DatabaseCluster
write_address = cluster.cluster_endpoint.socket_address
If you have existing security groups you would like to add to the cluster, use the addSecurityGroups
method. Security
groups added in this way will not be managed by the Connections
object of the cluster.
# vpc: ec2.Vpc
# cluster: docdb.DatabaseCluster
security_group = ec2.SecurityGroup(self, "SecurityGroup",
vpc=vpc
)
cluster.add_security_groups(security_group)
Deletion protection
Deletion protection can be enabled on an Amazon DocumentDB cluster to prevent accidental deletion of the cluster:
# vpc: ec2.Vpc
cluster = docdb.DatabaseCluster(self, "Database",
master_user=docdb.Login(
username="myuser"
),
instance_type=ec2.InstanceType.of(ec2.InstanceClass.R5, ec2.InstanceSize.LARGE),
vpc_subnets=ec2.SubnetSelection(
subnet_type=ec2.SubnetType.PUBLIC
),
vpc=vpc,
deletion_protection=True
)
Rotating credentials
When the master password is generated and stored in AWS Secrets Manager, it can be rotated automatically:
# cluster: docdb.DatabaseCluster
cluster.add_rotation_single_user()
cluster = docdb.DatabaseCluster(stack, "Database",
master_user=docdb.Login(
username="docdb"
),
instance_type=ec2.InstanceType.of(ec2.InstanceClass.R5, ec2.InstanceSize.LARGE),
vpc=vpc,
removal_policy=cdk.RemovalPolicy.DESTROY
)
cluster.add_rotation_single_user()
The multi user rotation scheme is also available:
import aws_cdk.aws_secretsmanager as secretsmanager
# my_imported_secret: secretsmanager.Secret
# cluster: docdb.DatabaseCluster
cluster.add_rotation_multi_user("MyUser",
secret=my_imported_secret
)
It’s also possible to create user credentials together with the cluster and add rotation:
# cluster: docdb.DatabaseCluster
my_user_secret = docdb.DatabaseSecret(self, "MyUserSecret",
username="myuser",
master_secret=cluster.secret
)
my_user_secret_attached = my_user_secret.attach(cluster) # Adds DB connections information in the secret
cluster.add_rotation_multi_user("MyUser", # Add rotation using the multi user scheme
secret=my_user_secret_attached)
Note: This user must be created manually in the database using the master credentials. The rotation will start as soon as this user exists.
See also @aws-cdk/aws-secretsmanager for credentials rotation of existing clusters.
Audit and profiler Logs
Sending audit or profiler needs to be configured in two places:
Check / create the needed options in your ParameterGroup for audit and profiler logs.
Enable the corresponding option(s) when creating the
DatabaseCluster
:
import aws_cdk.aws_iam as iam
import aws_cdk.aws_logs as logs
# my_logs_publishing_role: iam.Role
# vpc: ec2.Vpc
cluster = docdb.DatabaseCluster(self, "Database",
master_user=docdb.Login(
username="myuser"
),
instance_type=ec2.InstanceType.of(ec2.InstanceClass.R5, ec2.InstanceSize.LARGE),
vpc_subnets=ec2.SubnetSelection(
subnet_type=ec2.SubnetType.PUBLIC
),
vpc=vpc,
export_profiler_logs_to_cloud_watch=True, # Enable sending profiler logs
export_audit_logs_to_cloud_watch=True, # Enable sending audit logs
cloud_watch_logs_retention=logs.RetentionDays.THREE_MONTHS, # Optional - default is to never expire logs
cloud_watch_logs_retention_role=my_logs_publishing_role
)