Azure & DevOps Podcast

Andrew Lock: Containers in .NET 8 - Episode 281

Jan 22, 2024

Andrew Lock, senior software engineer at Datadog, discusses containers in .NET 8 including the use of chiseled containers for improved security. He explores self-contained ASP.NET applications, changes in containers for .NET 8 like running as a non-root user, and the advantages of using containers for testing. The speakers also touch on the readiness of open telemetry and its adoption in the observability space.

36:02

Creator website

Episode guests

Andrew Lock

AI Summary

AI Chapters

Episode notes

Podcast summary created with Snipd AI

Quick takeaways

Chiseled containers in .NET 6 offer enhanced security and smaller sizes by removing unnecessary components from Docker images, optimizing the attack surface and safeguarding the containerized application.

Open Telemetry in .NET applications provides a standardized and efficient method for collecting metrics, logs, and traces, enabling developers to gain valuable insights into performance and troubleshooting.

Deep dives

Containers cut dependencies and enhance portability

Containers, especially Linux containers, have become the default deployment mechanism for many developers. They offer a solution to dependency issues and provide a single deployable artifact that can run anywhere. With containers, developers have more flexibility in deploying their applications, whether on Azure or Kubernetes, and can easily achieve portability.

Introduction

2min

The Rise of Open Telemetry and its Adoption

4min

Chiseled Containers and their Benefits

11min

Exploring Self-Contained ASP.NET Applications and Deployment Methods

3min

Trimming and Composite Images in .NET Container Applications

2min

Changes in Containers for .NET 8

13min

Andrew Lock is a senior software engineer at Datadog, working out of Devon, in the UK. He is a Microsoft MVP, Author of ASP.NET Core in Action, and has an active blog all about his experience working with .NET and ASP.NET Core.

Topics of Discussion:

[3:08] What is Andrew working on these days?

[3:42] The push towards open telemetry in .NET and the ecosystem in general.

[4:49] In Andrew’s opinion, open telemetry is ready for use, but there is still much to learn.

[6:58] The state of containers for .NET developers.

[9:48] The use of chiseled containers.

[15:46] Using chiseled containers for that extra level of security.

[17:01] The different levels of chiseling.

[19:04] What does it mean to be a self-contained ASP.NET application?

[23:52] Other big container changes, including running as a non-root user and the default port inside the Docker container changing.

[28:18] Port 8080 and the user App.

[30:12] Windows containers for testing.