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Hi, I have requirement to use Kerberos authentication for ASP.NET WebAPI application deployed in Docker Swarm .NET Core linux containers. WebApi will be used by web clients with Kerberos support. Application also should be connected to active directory to subscribe and get list of all users from AD. Docker Swarm deployed on premises in the organization network. Anyone have experience with such configuration? <br />
- What should be done to enable Kerberos authentication in the ASP.NET and its Docker linux image? Will this require 3rd party kerberos tools or it can be handled by .NET Core?<br />
- To enable such configuration what should be configured in the SWARM cluster?<br />
- What should be used as service principal names (SPN)? And how to get user AD Identity inside ASP.NET?<br />
- Is it possible to use multiple container instances of the same application?<br />
- How I could use background worker service inside SWARM cluster to sync users list with the AD database?
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Hi, I have requirement to use Kerberos authentication for ASP.NET WebAPI application deployed in Docker Swarm .NET Core linux containers. WebApi will be used by web clients with Kerberos support. Application also should be connected to active directory to subscribe and get list of all users from AD. Docker Swarm deployed on premises in the organization network. Anyone have experience with such configuration? 
- What should be done to enable Kerberos authentication in the ASP.NET and its Docker linux image? Will this require 3rd party kerberos tools or it can be handled by .NET Core?
- To enable such configuration what should be configured in the SWARM cluster?
- What should be used as service principal names (SPN)? And how to get user AD Identity inside ASP.NET?
- Is it possible to use multiple container instances of the same application?
- How I could use background worker service inside SWARM cluster to sync users list with the AD database?

How to use AD Kerberos authentication for ASP.NET Core Web API (linux) inside Docker Swarm?

The successor to Active Server Pages, ASP.NET websites utilize the .NET framework to produce dynamic, data and content-driven web applications and services. ASP.NET code can be written using any .NET supported language. As of 2009, ASP.NET can also apply the Model-View-Controller (MVC) pattern to web applications

ASP.NET

The .NET Framework is not specific to any one programming language; rather, it includes a library of functions that allows developers to rapidly build applications. Several supported languages include C#, VB.NET, C++ or ASP.NET.

.NET Programming

Docker is a computer program used to run software packages called containers in an operating-system-level virtualization process called containerization. It’s developed by Docker, Inc. and was first released in 2013.

Docker

Active Directory (AD) is a Microsoft brand for identity-related capabilities. In the on-premises world, Windows Server AD provides a set of identity capabilities and services, and is hugely popular (88% of Fortune 1000 and 95% of enterprises use AD). This topic includes all things Active Directory including DNS, Group Policy, DFS, troubleshooting, ADFS, and all other topics under the Microsoft AD and identity umbrella.