Using aws backup with elb

Question

Pulumi · Accepted Answer

In order to create an AWS backup plan and assign it to an Elastic Load Balancer (ELB), you will need to set up resources utilizing both the AWS Backup and Elastic Load Balancing services. Below, I provide a Pulumi program in TypeScript that demonstrates how to do this. First, we'll create a target group for an ELB, and then we'll create a backup plan to automize the backups for those resources. Note that AWS Backup doesn't directly support backups of ELB; rather, it supports backing up associated resources like EC2 instances or EBS volumes. However, for the purpose of this educational example, the program will show you how to declare both types of resources.

First, you need to ensure you have Pulumi installed and have AWS credentials configured for use on your development machine. This code assumes you have node.js installed as well since the Pulumi program will be in TypeScript.

Now let's dive into the Pulumi code:

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

// Step 1: Create an ELB Target Group
// This group will contain the details for the load balancer, including the VPC ID it should belong to.
const targetGroup = new aws.elasticloadbalancingv2.TargetGroup("example-targetgroup", {
    port: 80,
    protocol: "HTTP",
    vpcId: "vpc-12345", // Replace with your actual VPC ID
    targetType: "instance", // This type indicates we are targeting EC2 instances
    // Health check settings can be specified if needed
});

// Step 2: Create a Backup Vault
// This is where backups are to be stored. You can use an existing vault or create a new one.
const backupVault = new aws.backup.Vault("example-vault", {
    // You can specify KMS Key ARN for encrypted backups
});

// Step 3: Create a Backup Plan
// In the backup plan, we outline how backups are taken, such as how often and the backup window.
const backupPlan = new aws.backup.Plan("example-plan", {
    name: "example-plan",
    rules: [{
        ruleName: "example-rule",
        schedule: "cron(0 12 * * ? *)", // Example: perform a backup every day at noon
        targetVaultName: backupVault.name,
        lifecycle: {
            deleteAfter: 90, // How many days to keep the backup
        },
        recoveryPointTags: {
            "Project": "example", // Tag our recovery points for easy filtering
        },
    }],
    // Advanced backup settings can be specified if needed
});

// Step 4: Assign Resources to Backup
// In this step, we specify which resources should be backed up according to the plan.
const selection = new aws.backup.Selection("example-selection", {
    iamRoleArn: "arn:aws:iam::123456789012:role/service-role/AWSBackupDefaultServiceRole", // Replace with the correct IAM role ARN
    planId: backupPlan.id,
    resources: [
        targetGroup.arn, // Targeting our previously created ELB Target Group. Replace with the actual resources you want to back up.
    ],
});

// Export values that may be beneficial, like the backup vault's ARN and the backup plan ID
export const backupVaultArn = backupVault.arn;
export const backupPlanId = backupPlan.id;
```

In this program:

- We create an ELB Target Group where we'd normally add our EC2 instances to be included behind the load balancer.
- We create a Backup Vault to store our backup data. By default, AWS Backup vaults are encrypted using AWS managed keys, but you can provide your own KMS key for encryption.
- We define a Backup Plan which includes rules that govern the frequency and the lifecycle (e.g., retention period) of backups.
- We create a Backup Selection which associates the plan with a set of resources (like EC2 instances).

Remember that AWS doesn't create direct backups of ELB settings; you would need to manage configurations via Infrastructure as Code, like Pulumi or record them separately.

Also, `arn:aws:iam::123456789012:role/service-role/AWSBackupDefaultServiceRole` is a placeholder role ARN. You should replace this with the ARN of an IAM Role that has permissions to perform backup operations. In a real-world scenario, you would define and manage the permissions for this IAM role using Pulumi.

Once you have coded your Pulumi program, remember to run `pulumi up` to deploy your infrastructure. Ensure you review the summary of resources that Pulumi plans to create, update, or delete before confirming the changes.

This code will establish the basic infrastructure for an AWS backup system. However, you might need to adjust resource properties and backup rules to suit your specific use case and to follow AWS best practices for security and resource management.