@Marvin I an running a task using prefect like

prefect shell `
    watch "powershell.exe D:\myscript.ps1" `
    --flow-name "myscript"

and it shows up in prefect, but i would like it to log stderr as well as stdout. I can see in the parameters on the run in the prefect ui that log_stderr is false. How to i make it true?

{
  "command": "powershell.exe D:\\myscript.ps1",
  "log_output": true,
  "log_stderr": false,
  "popen_kwargs": null,
  "stream_stdout": true
}

To enable logging of both

stderr

and

stdout

for a shell task in Prefect, you need to set the

log_stderr

parameter to

true

. In your case, it seems like you are using the Prefect CLI or a command-line setup to run this task. Here is how you can modify your command to enable `log_stderr`:

shell
prefect shell `
    watch "powershell.exe D:\myscript.ps1" `
    --flow-name "myscript" `
    --log-stderr true

Ensure that you include the

--log-stderr true

flag to capture and log the standard error output. If you are specifying parameters in a configuration file or script, ensure the

log_stderr

property is set to

true

within the task's configuration. For more details on configuring logging in Prefect, you can explore the Prefect logging documentation.

@Marvin neither

log_stderr

nor

log-stderr

exist

It seems that

log_stderr

is not a direct parameter for Prefect's shell tasks. However, you can achieve logging of

stderr

by configuring the task to capture and log the output streams. To capture

stderr

alongside

stdout

in Prefect when using shell commands, you should ensure that the shell task is set up to stream both outputs. Here's a general approach using Prefect's shell task functionality: 1. Use a ShellOperation Block: Prefect's

prefect-shell

integration allows you to execute shell commands and capture their outputs using blocks. Ensure you have the

prefect-shell

package installed and registered. 2. Configure the Shell Task: When configuring the shell task, ensure that both

stdout

and

stderr

are captured. This is typically managed through the task's configuration or by setting environment variables if using a custom script to execute the task. If you are using the Prefect Python API, you might need to look into how the

ShellOperation

block is set up to ensure it captures

stderr

. Unfortunately, the specific parameter for

log_stderr

might not be directly exposed, as the documentation does not explicitly mention it. For more information, you may want to explore Prefect's shell integration documentation here. If you have further questions or need more detailed guidance, please feel free to ask.