Hi, I have a prefect-server deployment managed by helm charts running in our k8s cluster. I see a lot of method not allowed (HTTP 405) errors when accessing the dashboard. Any idea, what is causing this?

Of course! I'm here to help. Could you please provide a bit more detail on what you need assistance with, especially if it's related to Prefect? If you have a specific question or topic in mind, let me know, and I'll do my best to assist you.

@Marvin I have a prefect-server deployment managed by helm charts running in our k8s cluster. I see a lot of method not allowed (HTTP 405) errors when accessing the dashboard. Any idea, what is causing this?

Let's dig into this issue with the Prefect server dashboard and those HTTP 405 errors you're encountering. First, could you confirm whether you're using Prefect 2.x or an earlier version? Prefect has undergone considerable changes between these versions, and knowing your version will help tailor the solution to your particular setup. To get started, here's what generally might cause HTTP 405 errors: 1. Improper HTTP Method Usage: HTTP 405 errors usually indicate that the HTTP method (like GET, POST, etc.) is not supported by the server for the requested resource. It's possible there might be some misconfiguration in how the requests to the Prefect API are being made from your dashboard. 2. Ingress Configuration Issues: If you're using Kubernetes, there might be issues with how the ingress is set up. Check if the HTTP methods are correctly routed to your Prefect server. 3. Backend Misconfiguration: Sometimes, this could stem from the way your backend services are configured, possibly requiring adjustments in your server or application handling. To investigate further, let me search for similar issues in GitHub and documentation related to Prefect and Helm deployments. This will give us a clearer view of any reported bugs or configuration issues that could relate to your setup. Please hold on for a moment. It looks like I ran into some issues while searching through GitHub and the documentation. Let's break it down and try again with a more targeted search. Meanwhile, since the Prefect server you're using is managed by Helm charts, here's what I suggest: 1. Check Ingress Configurations: Ensure that your Ingress is properly routing HTTP methods to the Prefect server. Verify that the HTTP methods required by the dashboard are allowed. 2. Prefect Server Logs: Tail the logs of your Prefect server to see if there are any errors or warnings that could provide more insights into why these HTTP 405 errors are occurring. 3. Helm Chart Configuration: Review your Helm chart values to ensure that all necessary configurations, especially those related to networking, are appropriately set. Let's try searching the Prefect 2.x or 3.x documentation again, focusing specifically on "HTTP 405" and "dashboard errors." I'll also attempt another search for GitHub issues. Please hold on. It seems I've encountered more obstacles—my apologies, it appears there were some access issues with GitHub and missing arguments in my searches. However, through the documentation for both Prefect 2.x and 3.x, there's some relevant advice about addressing unexpected HTTP redirects, which might relate to the issue you're facing with HTTP 405 errors. Here's a potential solution based on the documentation findings: 1. Ensure Trailing Slash: One common pitfall that could lead to HTTP method errors is the absence of a trailing slash in your endpoint URLs. Prefect endpoints might require a trailing slash in certain requests, and neglecting this can lead to method not allowed errors. Double-check your URL paths used in the dashboard and add a trailing slash if necessary. 2. Server Configuration Review: Double-checking your server configuration files for any discrepancies or changes that might have inadvertently restricted certain methods could also be wise. 3. Networking and Permissions: Ensure that your network policies and permissions in Kubernetes are not inadvertently blocking or misrouting the requests. Also, verify that there are no role or permission settings causing the API to reject specific methods. For more detailed steps on fixing issues like this or related troubleshooting guidance, you might find it helpful to check the Prefect Troubleshooting Guide for Prefect 2.x or the Prefect Cloud Troubleshooting Guide for Prefect 3.x.

The logs look like the following:

16:00:26.687 | INFO    | uvicorn.access - 172.16.0.58:45514 - "GET /prefect/dashboard HTTP/1.1" 200
16:00:26.788 | INFO    | uvicorn.access - 172.16.0.58:45514 - "GET /prefect/assets/index-kRVanVAE.js HTTP/1.1" 304
16:00:26.790 | INFO    | uvicorn.access - 172.16.0.58:45516 - "GET /prefect/assets/index-BWbGXrr_.css HTTP/1.1" 304
16:00:26.884 | DEBUG   | prefect.server.events.triggers - Running periodic evaluation as of 2024-12-04 16:00:26.884177+00:00 (offset 0.0s)
16:00:27.246 | INFO    | uvicorn.access - 172.16.0.58:45516 - "GET /prefect/ui-settings HTTP/1.1" 200
16:00:27.266 | INFO    | uvicorn.access - 172.16.0.58:45514 - "GET /prefect/assets/Dashboard-jojjFjuH.css HTTP/1.1" 304
16:00:27.268 | INFO    | uvicorn.access - 172.16.0.58:45516 - "GET /prefect/assets/Dashboard-BprTpfCi.js HTTP/1.1" 304
16:00:27.269 | INFO    | uvicorn.access - 172.16.0.58:45518 - "GET /prefect/assets/index-0yGGjo7r.js HTTP/1.1" 304
16:00:27.312 | INFO    | uvicorn.access - 172.16.0.58:45518 - "GET /prefect/api/health HTTP/1.1" 304
16:00:27.372 | INFO    | uvicorn.access - 172.16.0.58:45518 - "POST /prefect/api/flow_runs/count HTTP/1.1" 405
16:00:27.530 | INFO    | uvicorn.access - 172.16.0.58:45518 - "POST /prefect/api/flow_runs/filter HTTP/1.1" 405
16:00:27.545 | INFO    | uvicorn.access - 172.16.0.58:45518 - "POST /prefect/api/flow_runs/count HTTP/1.1" 405
16:00:27.546 | INFO    | uvicorn.access - 172.16.0.58:45516 - "POST /prefect/api/flow_runs/filter HTTP/1.1" 405
16:00:27.547 | INFO    | uvicorn.access - 172.16.0.58:45514 - "POST /prefect/api/flow_runs/count HTTP/1.1" 405
16:00:27.549 | INFO    | uvicorn.access - 172.16.0.58:45520 - "POST /prefect/api/flow_runs/count HTTP/1.1" 405
16:00:27.549 | INFO    | uvicorn.access - 172.16.0.58:45522 - "POST /prefect/api/flow_runs/count HTTP/1.1" 405
16:00:27.551 | INFO    | uvicorn.access - 172.16.0.58:45514 - "POST /prefect/api/flow_runs/count HTTP/1.1" 405
16:00:27.552 | INFO    | uvicorn.access - 172.16.0.58:45516 - "POST /prefect/api/flow_runs/count HTTP/1.1" 405
16:00:27.553 | INFO    | uvicorn.access - 172.16.0.58:45518 - "POST /prefect/api/flows/paginate HTTP/1.1" 405
16:00:27.554 | INFO    | uvicorn.access - 172.16.0.58:45524 - "POST /prefect/api/task_runs/count HTTP/1.1" 405
16:00:27.555 | INFO    | uvicorn.access - 172.16.0.58:45526 - "POST /prefect/api/task_runs/count HTTP/1.1" 405
16:00:27.556 | INFO    | uvicorn.access - 172.16.0.58:45528 - "POST /prefect/api/task_runs/count HTTP/1.1" 405
16:00:27.573 | INFO    | uvicorn.access - 172.16.0.58:45528 - "POST /prefect/api/task_runs/count HTTP/1.1" 405
16:00:27.574 | INFO    | uvicorn.access - 172.16.0.58:45526 - "POST /prefect/api/task_runs/history HTTP/1.1" 405
16:00:27.575 | INFO    | uvicorn.access - 172.16.0.58:45524 - "POST /prefect/api/work_pools/filter HTTP/1.1" 405