How to Display Log Outputs in Preview Mode?

To display log outputs in preview mode using Pulumi in TypeScript, we will follow these steps:

1. Introduction: Provide an overview of the solution and the key services involved.
2. Step-by-Step Explanation: Detail the steps required to implement the solution.
3. Key Points: Highlight the important aspects to consider.
4. Conclusion: Summarize the solution and its benefits.

Introduction

In this guide, we will demonstrate how to display log outputs in preview mode using Pulumi with TypeScript. Pulumi is an Infrastructure as Code (IaC) tool that allows you to define and manage cloud resources using familiar programming languages. By displaying log outputs during the preview phase, you can gain insights into the expected changes and resource configurations before applying them. This can help in identifying potential issues and ensuring that the infrastructure changes align with your expectations.

Step-by-Step Explanation

Step 1: Set Up Pulumi Project

First, ensure that you have Pulumi installed and set up a new Pulumi project. You can do this by running the following commands:

pulumi new typescript

This will create a new Pulumi project with the necessary configuration files.

Step 2: Define Resources and Log Outputs

Next, define the resources you want to manage and include log outputs to display information during the preview phase. For example, you can create an S3 bucket and log its name:

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

const bucket = new aws.s3.Bucket("my-bucket");

// Log the bucket name during preview
pulumi.log.info(`Bucket name: ${bucket.id}`);

Step 3: Run Pulumi Preview

Finally, run the Pulumi preview command to see the log outputs:

pulumi preview

This will display the expected changes and the log outputs defined in your code.

Key Points

• Pulumi Log Functions: Pulumi provides various log functions such as pulumi.log.info, pulumi.log.warn, and pulumi.log.error to display different levels of log messages.
• Preview Mode: The pulumi preview command allows you to see the expected changes and log outputs without making any actual changes to the infrastructure.
• Resource Outputs: You can log resource outputs and other information to gain insights into the resource configurations during the preview phase.

Conclusion

By following this guide, you can effectively display log outputs in preview mode using Pulumi with TypeScript. This helps in understanding the expected changes and resource configurations before applying them, ensuring that your infrastructure changes are as expected and reducing the risk of potential issues.

Full Code Example

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

const bucket = new aws.s3.Bucket("my-bucket");

// Log the bucket name during preview
pulumi.log.info(`Bucket name: ${bucket.id}`);

export const bucketName = bucket.id;