Скачать или смотреть Resolving The Remote Certificate Is Invalid Error with IdentityServer 4 in Docker Compose

Discover how to configure IdentityServer 4 in Docker Compose without SSL issues. Follow these steps to avoid remote certificate errors and ensure smooth connectivity between your services.
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This video is based on the question https://stackoverflow.com/q/66512914/ asked by the user 'Mohamed Salah' ( https://stackoverflow.com/u/1026611/ ) and on the answer https://stackoverflow.com/a/66521439/ provided by the user 'Mohamed Salah' ( https://stackoverflow.com/u/1026611/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Introduction

When working with IdentityServer 4 in a Docker environment, you might encounter an error: "The remote certificate is invalid according to the validation procedure." This can be frustrating, especially if your applications consist of multiple microservices like an API, client, and identity server. The challenge arises mainly due to SSL configuration issues when trying to connect the client to the identity server. In this guide, we'll discuss the problem and detail an effective solution to ensure that your IdentityServer runs smoothly in a Docker Compose setup.

Understanding the Issue

The error message you may see when trying to connect your client application to the identity server typically includes terms like RemoteCertificateNameMismatch and RemoteCertificateChainErrors. These errors indicate that the SSL certificate presented by the identity server is either invalid or not trusted by the client.

Here’s a brief overview of the key components involved in the setup:

API: Handles the backend logic of your application.

Client: The user interface that interacts with users.

IdentityServer: Manages security tokens and user authentication.

Docker: Containerization tool used to deploy your applications.

Steps to Resolve the Issue

To resolve the certificate validation problem while configuring IdentityServer 4 in Docker, follow these organized steps:

1. Modify IdentityServer Configuration for IIS Without SSL

Start by updating your IdentityServer configuration settings to disable SSL. This will allow the identity server to operate without requiring HTTPS during local development.

2. Adjust Docker Configuration

In your docker-compose.yml, make sure to remove any SSL-related configurations from the IdentityServer service. This includes disabling port mappings for HTTPS (e.g., removing the - '5001:443' mapping). Instead, use HTTP ports, which simplifies the setup during local development.

3. Run the Application

Once the changes have been made to the IdentityServer and Docker configurations, run your application using Docker Compose. Ensure that all services (API, Client, IdentityServer) are up and communicating without SSL issues.

4. Prepare for Production Environment

Finally, make sure to implement SSL configuration for the production environment. It's essential to apply the correct certificates and settings for security when deploying your applications live. While developing, you can keep the non-SSL settings, but always plan to switch to SSL in production.

Example Configuration

Here’s a simplified example of how your Docker Compose service for IdentityServer could look after making the changes:

[[See Video to Reveal this Text or Code Snippet]]

Make sure to also update the client settings to match:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

Configuring IdentityServer 4 in a Docker environment can be tricky, particularly when dealing with SSL certificates. However, by following the steps outlined above, you can resolve the certificate-related issues and ensure that your services communicate effectively. Always remember to revisit your configurations before going live, to switch from HTTP to HTTPS and include proper SSL certificate management.

If you follow these guidelines, you can ensure a smoother deployment of your microservices architecture powered by IdentityServer 4.