MongoDB connection error on Deno Deploy
Hello,
I've a project running on Deno Deploy using Deno Fresh and I need to write information being captured in a form to a MongoDB database.
I'm using the deno_mongo drive on denoland. I'm able to connect, read and write data when I run locally but when I deploy to Deno Deploy, i get the following error below after the project builds. I've enabled access to MongoDB, not restricting IP addresses.
Any ideas on how I could fix this? Thanks in advance.
{"type":"error","code":"deploymentFailed","ctx":"The deployment failed: UNCAUGHT_EXCEPTION\n\nError: MongoError: "Connection failed: Connection refused (os error 111)"\n at MongoClient.connect (https://deno.land/x/mongo@v0.32.0/src/client.ts:31:13)\n at eventLoopTick (ext:core/01_core.js:183:11)\n at async file:///src/config/mongodb.ts:10:1"}
#deploy™
3 Replies
Disregard the above, figured it out!
Hello there! 🦕
The error you're encountering, "Connection failed: Connection refused (os error 111)," typically indicates that the Deno Deploy runtime is unable to establish a TCP connection to the MongoDB server. This could be due to a variety of reasons, such as incorrect connection details, network issues, or the MongoDB server not accepting connections from the Deno Deploy environment.
Here are a few steps you can take to troubleshoot this issue:
1. Double-check Connection Details: Ensure that the connection string you're using in your Deno Deploy environment is correct and that it points to the MongoDB server that is accessible over the internet. Localhost connections won't work in the Deno Deploy environment.
2. MongoDB Server Configuration: Verify that your MongoDB server is configured to accept connections from any IP address since you mentioned that you're not restricting IP addresses. Also, ensure that the MongoDB server is not behind a firewall that could be blocking incoming connections from Deno Deploy.
3. Use the Latest deno_mongo Version: Make sure you are using the latest version of the
deno_mongo driver that is compatible with Deno Deploy. The documentation suggests using the LATEST_VERSION tag when importing the module. For example:
4. Deno Deploy Permissions: Confirm that your Deno Deploy project has the necessary permissions to make network requests. You can set permissions in the deno.json configuration file or when you run the deployctl command.
5. Test with a Different MongoDB Service: If you're running your own MongoDB server, try connecting to a MongoDB service hosted by a cloud provider to see if theissue persists. This can help determine if the problem is with the server setup or the Deno Deploy environment.
6. Review Deno Deploy Logs: Check the logs in your Deno Deploy dashboard for any additional information that might help you understand the issue better.
If you've gone through these steps and the issue persists, it might be helpful to share more details about your MongoDB setup and how you're constructing the connection string. This way, we can provide more targeted assistance.
Remember that the Deno Deploy environment is different from your local environment, so network configurations that work locally might not apply in the cloud. Keep an eye on the network accessibility of your MongoDB server and ensure it's configured to accept connections from Deno Deploy.