Error: Callback for provider type credentials not supported
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docokara posted this in #help-forum
docokaraOP
Hello, i created a website thanks nextjs and nextauth. The project is in my vps (that have ssl certificate to allow https). When i start the projet using command line (with npm run start at the port 80) , the website work perferctly. I can login thanks nextauth. But when i dockerise my projet using following dockerfile and docker-compose :
docker-file :
docker-compose :
The website still work but when i tried to login thanks nextauth it return me error 521 with this error when i go to the url -> /api/auth/callback/credentials, i see this error :
"Error: Callback for provider type credentials not supported" .
Precision : when i click on the button signin, the code inside the authorize function in my CredentialProvider is executed but it instantly make the projet restart (because of docker and restart : always), but there is not error in the logs.
docker-file :
FROM node:20.9-alpine3.18
WORKDIR /app
COPY package.json ./
RUN npm install
COPY . .
EXPOSE 3000
CMD ["npm", "run" ,"dev"]docker-compose :
version: "3"
services:
myapp:
build: .
ports:
- 80:3000
volumes:
- .:/app
restart: always
network_mode: bridgeThe website still work but when i tried to login thanks nextauth it return me error 521 with this error when i go to the url -> /api/auth/callback/credentials, i see this error :
"Error: Callback for provider type credentials not supported" .
Precision : when i click on the button signin, the code inside the authorize function in my CredentialProvider is executed but it instantly make the projet restart (because of docker and restart : always), but there is not error in the logs.
4 Replies
docokaraOP
up
Bigeye tuna
The error message "Error: Callback for provider type credentials not supported" you're encountering typically indicates that there's an issue with the way your NextAuth.js configuration handles the callback for the credentials provider. The fact that the error leads to a project restart within Docker (due to the restart: always policy) without any errors in the logs adds a layer of complexity to the troubleshooting process.
Let's address the potential causes and solutions:
NextAuth Callback Configuration: Ensure that your NextAuth configuration in [...nextauth].js correctly implements the authorize function and that it returns either a user object or null.
Docker Environment Variables: When running inside a Docker container, environment variables may differ from your development environment. Verify that all necessary environment variables are correctly set within the Docker container.
HTTPS and Callback URL: Since your VPS has an SSL certificate, make sure that the callback URLs and the site's URL are using https instead of http. Mismatched protocols can cause issues with authentication callbacks.
Port and Network Configuration: Although you've mapped the Docker container's port 3000 to the VPS's port 80, ensure that there are no conflicts or restrictions that could affect the communication with the authentication provider.
Docker Volume: Your volume binding of . to /app in the Docker container might cause issues if node modules or other necessary files are overwritten by your local volume. Consider using Docker's copy instruction for production builds, or ensure that your volume mounting doesn't conflict with the container's contents.
Restart Policy Impact: If the authorization attempt leads to a restart, it might be because of an unhandled exception or error in your authorization logic that's not being logged. This could be due to the way Docker handles output or the configuration of your logging system.
Let's address the potential causes and solutions:
NextAuth Callback Configuration: Ensure that your NextAuth configuration in [...nextauth].js correctly implements the authorize function and that it returns either a user object or null.
Docker Environment Variables: When running inside a Docker container, environment variables may differ from your development environment. Verify that all necessary environment variables are correctly set within the Docker container.
HTTPS and Callback URL: Since your VPS has an SSL certificate, make sure that the callback URLs and the site's URL are using https instead of http. Mismatched protocols can cause issues with authentication callbacks.
Port and Network Configuration: Although you've mapped the Docker container's port 3000 to the VPS's port 80, ensure that there are no conflicts or restrictions that could affect the communication with the authentication provider.
Docker Volume: Your volume binding of . to /app in the Docker container might cause issues if node modules or other necessary files are overwritten by your local volume. Consider using Docker's copy instruction for production builds, or ensure that your volume mounting doesn't conflict with the container's contents.
Restart Policy Impact: If the authorization attempt leads to a restart, it might be because of an unhandled exception or error in your authorization logic that's not being logged. This could be due to the way Docker handles output or the configuration of your logging system.
To diagnose the issue, try the following steps:
Check NextAuth.js Configuration: Review your NextAuth.js provider configuration to ensure that the credentials provider is correctly implemented.
Inspect the Logs: Modify your Docker configuration to ensure that logs are appropriately persisted and review them for any errors during the authentication process.
Remove Restart Always Temporarily: Temporarily remove restart: always from your Docker compose file and observe the behavior when attempting to authenticate. This may prevent the restart loop and allow you to see the error causing the crash.
Simplify the Deployment: Test your Docker setup locally first to ensure it works before deploying to your VPS. This helps isolate the problem to either the Docker configuration or the deployment environment.
Replicate the Production Environment Locally: Try to replicate your VPS's environment as closely as possible locally, including the use of https if applicable.
Consult NextAuth.js Documentation: Refer to NextAuth.js documentation or community for specific guidance on implementing credential-based authentication.
If after trying these steps you're still encountering issues, you may want to seek direct support from the NextAuth.js community or from a developer with experience in debugging Docker-Next.js applications.
Check NextAuth.js Configuration: Review your NextAuth.js provider configuration to ensure that the credentials provider is correctly implemented.
Inspect the Logs: Modify your Docker configuration to ensure that logs are appropriately persisted and review them for any errors during the authentication process.
Remove Restart Always Temporarily: Temporarily remove restart: always from your Docker compose file and observe the behavior when attempting to authenticate. This may prevent the restart loop and allow you to see the error causing the crash.
Simplify the Deployment: Test your Docker setup locally first to ensure it works before deploying to your VPS. This helps isolate the problem to either the Docker configuration or the deployment environment.
Replicate the Production Environment Locally: Try to replicate your VPS's environment as closely as possible locally, including the use of https if applicable.
Consult NextAuth.js Documentation: Refer to NextAuth.js documentation or community for specific guidance on implementing credential-based authentication.
If after trying these steps you're still encountering issues, you may want to seek direct support from the NextAuth.js community or from a developer with experience in debugging Docker-Next.js applications.
@Bigeye tuna To diagnose the issue, try the following steps:
Check NextAuth.js Configuration: Review your NextAuth.js provider configuration to ensure that the credentials provider is correctly implemented.
Inspect the Logs: Modify your Docker configuration to ensure that logs are appropriately persisted and review them for any errors during the authentication process.
Remove Restart Always Temporarily: Temporarily remove restart: always from your Docker compose file and observe the behavior when attempting to authenticate. This may prevent the restart loop and allow you to see the error causing the crash.
Simplify the Deployment: Test your Docker setup locally first to ensure it works before deploying to your VPS. This helps isolate the problem to either the Docker configuration or the deployment environment.
Replicate the Production Environment Locally: Try to replicate your VPS's environment as closely as possible locally, including the use of https if applicable.
Consult NextAuth.js Documentation: Refer to NextAuth.js documentation or community for specific guidance on implementing credential-based authentication.
If after trying these steps you're still encountering issues, you may want to seek direct support from the NextAuth.js community or from a developer with experience in debugging Docker-Next.js applications.
docokaraOP
thank you very much for your detailed reply. I'll try all steps that you describe, i hope one of them would resolve my problems ^^. Have a nice day !