@Marvin I am running an instance of prefect-server on an on prem kubernetes cluster and have also deployed an agent to the default-agent-pool. I am running the prefect-server with ingress and have adjusted the agent to point to that ingress api url. Additionally, we are using a proxy, so I have added the HTTP_PROXY, HTTPS_PROXY, and SSL_CERT_FILE environment variables to both the prefect-server and the agent. However, the agent throws the following error upon startup:

prefect.exceptions.PrefectHTTPStatusError: Client error '405 Method Not Allowed' for url <https://my-prefect.com/api/work_pools/default-agent-pool/get_scheduled_flow_runs>`
Response: {'detail': 'Method Not Allowed'}

What is the cause of this error and how can it be resolved?

Ah, the plot thickens. It seems we've stumbled upon a couple of interesting threads in our investigation. From the Prefect documentation, we didn't find a direct reference to the '405 Method Not Allowed' error. However, we did find some information about rate limits and how to connect to Prefect Cloud, which might be useful if you're experiencing connectivity issues. You can check these out here and here. On the GitHub side, we found a couple of issues that might be related to your problem. One issue titled "Method Not Allowed 405 on prefect 2 cloud with latest 2.0b11" seems to suggest that there might be a compatibility issue between the Prefect Cloud API and the client library. Another issue titled "Work pools with no name cannot be deleted" might be relevant if you're having trouble with work pools. Based on this information, I would suggest checking the version of your Prefect client library and ensuring it's compatible with the Prefect Cloud API. If you're using work pools, make sure they are properly named and configured. If none of these suggestions resolve your issue, you might want to consider opening a new issue on the Prefect GitHub repository. The Prefect team seems quite responsive and might be able to provide more specific assistance. Remember, even the best of us run into errors sometimes. It's just a part of the dance of coding. Keep your chin up and keep debugging!

@Marvin What is the best way to check the versions of the client and server?

Ah, the mysteries of version checking have been unveiled. Here's how you can check the versions of your Prefect client and server: To check the version of your Prefect client library, you can use the following Python command:

python
import prefect
print(prefect.__version__)

This command will print the version of the Prefect client library that you have installed in your Python environment. For example, you might see something like

0.14.16

. To check the version of your Prefect server, you can use the Prefect CLI command

prefect version

. This command will print version and environment details to your console, including the server database and version. For example, you might see something like this:

bash
$ prefect version
Version: 2.10.4
API version: 0.8.4
Python version: 3.9.16
Git commit: b6d0433a
Built: Thu, Apr 13, 2023 5:34 PM
OS/Arch: darwin/arm64
Profile: default
Server type: cloud

In this example, the Prefect version is

2.10.4

. Remember, knowing your versions is like knowing your ABCs. It's basic, but it's essential. Happy coding! source source

@Marvin They are both running v2.10.20 -- in fact they are both pulling the exact same docker image. Are there any other potential causes?

Ah, it seems we've hit a bit of a roadblock. The Prefect documentation doesn't provide a direct answer to your question, and the GitHub issues don't seem to match your situation exactly. It's like trying to find a needle in a haystack, but the haystack is made of needles. However, there are a few things that might be worth investigating: 1. The Prefect documentation mentions a potential issue with service workers causing a '404 Page Not Found' error. While this isn't the same as your '405 Method Not Allowed' error, it might be worth checking if unregistering service workers resolves your issue. You can find more information on how to do this here. 2. One of the GitHub issues mentions a potential issue with client authentication. While this issue doesn't mention a '405 Method Not Allowed' error specifically, it might be worth checking if your client is properly authenticated. You can find more information on this issue here. 3. Another GitHub issue mentions a '405 Method Not Allowed' error, but this seems to be related to a compatibility issue between the Prefect Cloud API and the client library. Since you're running the same version for both your client and server, this might not be the cause of your issue. However, it might be worth checking if there are any updates available for your Prefect client library or server. You can find more information on this issue here. Remember, troubleshooting is a process of elimination. It's like trying to find the right key for a lock. Sometimes it takes a bit of trial and error, but with patience and persistence, you'll find the right fit.

@Marvin I tried upgrading my version to see if it made a difference. After upgrading to prefect 2.10.21 my agent got the following error when attempting to start:

prefect.exceptions.PrefectHTTPStatusError: Client error '422 Unprocessable Entity' for url '<https://my-prefect.com/api/flow_runs/filter>'
Response: {'exception_message': 'Invalid request received.', exception_detail': [{'loc': ['path', 'id'], 'msg': value is not a valid uuid', 'type': 'type_error.uuid'}], 'request_body': None}

This is a different issue, but I am still not sure how to resolve it. I also see this issue when I downgrade to 2.10.19.