1. Answers
  2. Implementing AWS X-Ray Monitoring with Pulumi

How do I set up AWS X-Ray for application tracing and monitoring?

To set up AWS X-Ray for application tracing and monitoring, you’ll need to configure an X-Ray tracing infrastructure, which includes setting up an X-Ray daemon, tracing policies, and ensuring the services you want to monitor are instrumented correctly. Below is an example configuration that includes creating an IAM role with the appropriate permissions, an X-Ray group, and an X-Ray sampling rule.

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

// IAM Role for X-Ray Daemon
const xrayServiceRole = new aws.iam.Role("xray_service_role", {
    name: "XRayServiceRole",
    assumeRolePolicy: JSON.stringify({
        Version: "2012-10-17",
        Statement: [{
            Effect: "Allow",
            Principal: {
                Service: "xray.amazonaws.com",
            },
            Action: "sts:AssumeRole",
        }],
    }),
});
// Attach X-Ray policy to the role
const xrayPolicyAttachment = new aws.iam.RolePolicyAttachment("xray_policy_attachment", {
    role: xrayServiceRole.name,
    policyArn: "arn:aws:iam::aws:policy/AWSXrayWriteOnlyAccess",
});
// X-Ray Group
const example = new aws.xray.Group("example", {
    filterExpression: "service("MyService")",
    groupName: "example-group",
});
// X-Ray Sampling Rule
const exampleSamplingRule = new aws.xray.SamplingRule("example", {
    ruleName: "example-sampling-rule",
    resourceArn: "*",
    priority: 1,
    reservoirSize: 1,
    fixedRate: 0.05,
    serviceName: "*",
    httpMethod: "*",
    urlPath: "*",
    host: "*",
    serviceType: "*",
    version: 1,
});
export const xrayIamRoleArn = xrayServiceRole.arn;
export const xrayGroupName = example.groupName;
export const xraySamplingRuleName = exampleSamplingRule.ruleName;

In this configuration:

  1. IAM Role and Policy: An IAM Role is created for the X-Ray service, allowing it to function correctly by assuming the necessary permissions. Here, the AWS managed policy AWSXrayWriteOnlyAccess is attached to the role.
  2. X-Ray Group: An X-Ray group is defined to contain and filter traces for a specific service, determined by the filter_expression.
  3. X-Ray Sampling Rule: A sampling rule is established to specify the rate and conditions under which requests are sampled by X-Ray, helping manage the trace data volume.

In conclusion, this setup provides a foundational structure for adding AWS X-Ray to your monitoring stack, ensuring all necessary permissions and configurations are in place for tracing your applications effectively.

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