How do I create an AWS RDS Multi-AZ deployment strategy?
Explanation
Deploying an AWS RDS instance in a Multi-AZ configuration ensures high availability and failover support for your databases. This setup helps to improve the fault tolerance and reliability of your database deployment. The infrastructure defined here includes:
- VPC and Subnets: Subnets are divided across different Availability Zones to ensure Multi-AZ configuration.
- Security Group: Controls access to the RDS instance by specifying the allowed inbound and outbound rules.
- RDS Instance: An RDS instance configured with Multi-AZ deployment.
Code Implementation
import * as pulumi from "@pulumi/pulumi";
import * as aws from "@pulumi/aws";
// Create a VPC
const main = new aws.ec2.Vpc("main", {
cidrBlock: "10.0.0.0/16",
tags: {
Name: "main-vpc",
},
});
// Create Public Subnets in two different Availability Zones for Multi-AZ purposes
const subnetA = new aws.ec2.Subnet("subnet_a", {
vpcId: main.id,
cidrBlock: "10.0.1.0/24",
availabilityZone: "us-west-2a",
tags: {
Name: "subnet-a",
},
});
const subnetB = new aws.ec2.Subnet("subnet_b", {
vpcId: main.id,
cidrBlock: "10.0.2.0/24",
availabilityZone: "us-west-2b",
tags: {
Name: "subnet-b",
},
});
// Create a Security Group
const rdsSg = new aws.ec2.SecurityGroup("rds_sg", {
vpcId: main.id,
ingress: [{
fromPort: 3306,
toPort: 3306,
protocol: "tcp",
cidrBlocks: ["0.0.0.0/0"],
}],
egress: [{
fromPort: 0,
toPort: 0,
protocol: "-1",
cidrBlocks: ["0.0.0.0/0"],
}],
tags: {
Name: "rds-sg",
},
});
// Create a DB Subnet Group
const rdsSubnetGroup = new aws.rds.SubnetGroup("rds_subnet_group", {
name: "rds-subnet-group",
subnetIds: [
subnetA.id,
subnetB.id,
],
tags: {
Name: "rds-subnet-group",
},
});
// Create an RDS instance with Multi-AZ deployment
const mainInstance = new aws.rds.Instance("main", {
allocatedStorage: 20,
engine: "mysql",
instanceClass: aws.rds.InstanceType.T3_Micro,
name: "mydatabase",
username: "admin",
password: "password123",
dbSubnetGroupName: rdsSubnetGroup.name,
multiAz: true,
vpcSecurityGroupIds: [rdsSg.id],
tags: {
Name: "rds-main",
},
});
export const vpcId = main.id;
export const dbInstanceAddress = mainInstance.endpoint;
export const dbInstanceId = mainInstance.id;
Summary
In this example, we’ve set up a Multi-AZ deployment strategy for AWS RDS using infrastructure as code. We created a VPC, two subnets in different availability zones, a security group to control access, a database subnet group, and the RDS instance itself configured for Multi-AZ deployment. This setup enhances the availability and resilience of your database.
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