Restoring Data from an RDS Cluster Snapshot

Question

Pulumi · Accepted Answer

Restoring data from an Amazon RDS Cluster Snapshot is a common task when you need to recover or duplicate a database environment from a specific point in time. The process involves creating a new RDS Cluster from the snapshot that you have previously taken.

In this Pulumi program written in TypeScript, I'm going to show you how to restore an RDS cluster from a snapshot. We will use the aws.rds.Cluster resource to create a new RDS cluster and specify a snapshotIdentifier to restore from. Before running this code, make sure that you have AWS credentials configured for Pulumi and that you replace "<my-cluster-snapshot-id>" with the identifier of your RDS cluster snapshot.

Here's how you do it:

import * as aws from "@pulumi/aws";

// Replace the following properties with your specific snapshot details
const snapshotIdentifier = "<my-cluster-snapshot-id>"; // ID of the snapshot to restore from
const newClusterIdentifier = "my-new-cluster"; // Identifier for the new cluster

const restoredCluster = new aws.rds.Cluster("restoredCluster", {
    // Specify properties for the new cluster
    clusterIdentifier: newClusterIdentifier,
    dbSubnetGroupName: "<my-db-subnet-group-name>",
    vpcSecurityGroupIds: ["<my-vpc-security-group-id>"],
    
    // The identifier of the RDS snapshot to create the cluster from
    snapshotIdentifier: snapshotIdentifier,
    
    // Reset the master password for the new cluster; alternatively, it could be retrieved from a secret store
    masterPassword: "<new-master-password>",

    // Specify other configurations based on your requirements
    dbClusterInstanceClass: "db.m4.large",
    engine: "aurora",
    skipFinalSnapshot: true, // Set to false if you want a final snapshot when this cluster is deleted
});

// Optional: To output the endpoint of the restored cluster
export const endpoint = restoredCluster.endpoint;

In the code above:

We import the @pulumi/aws package, which contains all the necessary functionality to interact with AWS resources.
We create a new aws.rds.Cluster instance, which represents the new RDS cluster to be restored from the snapshot.
The properties include:
- clusterIdentifier: A unique identifier for the restored cluster.
- dbSubnetGroupName: The DB subnet group to use for the RDS instance.
- vpcSecurityGroupIds: The VPC security groups to associate with the cluster.
- snapshotIdentifier: The RDS cluster snapshot identifier from which we're restoring.
- masterPassword: The new master password for the restored cluster.
- dbClusterInstanceClass and engine: These specify the instance type and the database engine for your cluster.
- skipFinalSnapshot: A boolean flag to determine if a final snapshot should be taken when the cluster is deleted. For production environments, you would typically set this to false.

Please replace <my-cluster-snapshot-id>, <my-new-cluster>, <my-db-subnet-group-name>, <my-vpc-security-group-id>, and <new-master-password> with your actual snapshot identifier, desired new cluster identifier, your DB subnet group name, the appropriate VPC security group ID, and the new master password for the RDS cluster.

Once you have configured the details and run the Pulumi program with pulumi up, Pulumi will provision the new RDS cluster from the specified snapshot. You can use the exported endpoint to connect to your newly restored RDS cluster.