Using Amazon Managed Service for Prometheus with interface VPC endpoints

If you use Amazon Virtual Private Cloud (Amazon VPC) to host your AWS resources, you can establish private connections between your VPC and Amazon Managed Service for Prometheus. You can use these connections to enable Amazon Managed Service for Prometheus to communicate with your resources on your VPC without going through the public internet.

Amazon VPC is an AWS service that you can use to launch AWS resources in a virtual network that you define. With a VPC, you have control over your network settings, such the IP address range, subnets, route tables, and network gateways. To connect your VPC to Amazon Managed Service for Prometheus, you define an interface VPC endpoint to connect your VPC to AWS services. The endpoint provides reliable, scalable connectivity to Amazon Managed Service for Prometheus without requiring an internet gateway, a network address translation (NAT) instance, or a VPN connection. For more information, see What Is Amazon VPC in the Amazon VPC User Guide.

Interface VPC endpoints are powered by AWS PrivateLink, an AWS technology that enables private communication between AWS services using an elastic network interface with private IP addresses. For more information, see the New – AWS PrivateLink for AWS Services blog post.

The following information is for Amazon VPC users. For information about how to get started with Amazon VPC, see Getting Started in the Amazon VPC User Guide.

Create an interface VPC endpoint for Amazon Managed Service for Prometheus

Create an interface VPC endpoint to begin using Amazon Managed Service for Prometheus. Choose from the following service name endpoints:

For more information, including step-by-step instructions to create an interface VPC endpoint, see Creating an interface endpoint in the Amazon VPC User Guide.

If you created an interface VPC endpoint for Amazon Managed Service for Prometheus and already have data flowing to the workspaces located on your VPC, the metrics will flow through the interface VPC endpoint by default. Amazon Managed Service for Prometheus uses public endpoints or private interface endpoints (whichever are in use) to perform this task.

Controlling access to your Amazon Managed Service for Prometheus VPC endpoint

You can use VPC endpoint policies to control access to your Amazon Managed Service for Prometheus interface VPC endpoint. A VPC endpoint policy is an IAM resource policy that you attach to an endpoint when you create or modify the endpoint. If you don't attach a policy when you create an endpoint, Amazon VPC attaches a default policy for you that allows full access to the service. An endpoint policy doesn't override or replace IAM identity-based policies or service-specific policies. It's a separate policy for controlling access from the endpoint to the specified service.

For more information, see Controlling Access to Services with VPC Endpoints in the Amazon VPC User Guide.

The following is an example of an endpoint policy for Amazon Managed Service for Prometheus. This policy allows users with the role PromUser connecting to Amazon Managed Service for Prometheus through the VPC to view workspaces and rule groups, but not, for example, to create or delete workspaces.

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "AmazonManagedPrometheusPermissions",
            "Effect": "Allow",
            "Action": [
                "aps:DescribeWorkspace",
                "aps:DescribeRuleGroupsNamespace",
                "aps:ListRuleGroupsNamespace",
                "aps:ListWorkspaces"
            ],
            "Resource": "arn:aws:aps:*:*:/workspaces*",
            "Principal": {
                "AWS": [
                    "arn:aws:iam::111122223333:role/PromUser"
                ]
            }
        }
    ]
}

The following example shows a policy that only allows requests coming from a specified IP address in the specified VPC to succeed. Requests from other IP addresses will fail.

{
    "Statement": [
        {
            "Action": "aps:*",
            "Effect": "Allow",
            "Principal": "*",
            "Resource": "*",
            "Condition": {
                "IpAddress": {
                    "aws:VpcSourceIp": "192.0.2.123"
                },
        "StringEquals": {
                    "aws:SourceVpc": "vpc-555555555555"
                }
            }
        }
    ]
}