How do I build an Azure network routetable?

Building an Azure Network Route Table

In this guide, we will create a network route table in Azure, associating it with a subnet. A route table allows you to define routes that determine how network traffic is directed. We’ll define a route table with a custom route and associate it with a subnet within a virtual network (VNet).

Key Points

• Route Table: Contains a set of routes that can determine where to direct network traffic.
• Virtual Network: A logically isolated network within the Azure cloud.
• Subnet Association: Linking the route table to a subnet allows its routes to apply to the subnet.

Example Program

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

const example = new azure.core.ResourceGroup("example", {
    name: "example-resources",
    location: "West US",
});
const exampleVirtualNetwork = new azure.network.VirtualNetwork("example", {
    name: "example-vnet",
    addressSpaces: ["10.0.0.0/16"],
    location: example.location,
    resourceGroupName: example.name,
});
const exampleSubnet = new azure.network.Subnet("example", {
    name: "example-subnet",
    resourceGroupName: example.name,
    virtualNetworkName: exampleVirtualNetwork.name,
    addressPrefixes: ["10.0.1.0/24"],
});
const exampleRouteTable = new azure.network.RouteTable("example", {
    name: "example-route-table",
    location: example.location,
    resourceGroupName: example.name,
    routes: [{
        name: "example-route",
        addressPrefix: "0.0.0.0/0",
        nextHopType: "Internet",
    }],
});
const exampleSubnetRouteTableAssociation = new azure.network.SubnetRouteTableAssociation("example", {
    subnetId: exampleSubnet.id,
    routeTableId: exampleRouteTable.id,
});
export const routeTableId = exampleRouteTable.id;
export const subnetId = exampleSubnet.id;

In this program:

• The azurerm_resource_group block creates a resource group to hold the related resources.
• The azurerm_virtual_network block sets up a virtual network with the specified address space.
• The azurerm_subnet block defines a subnet within the virtual network.
• The azurerm_route_table block creates a route table with a custom route directing all traffic (0.0.0.0/0) to the Internet.
• The azurerm_subnet_route_table_association block associates the route table with the subnet.
• The output blocks provide the IDs of the created route table and subnet for easy reference.

Conclusion

By following this guide, you’ve learned to create and associate an Azure network route table with a subnet, allowing for custom routing of network traffic. This is essential for setting up more complex networking scenarios in your Azure environment.