Any way to hook into errors in handlers?

[SStorm]

Keywords

handlers subhandlers error_handling errors error_hook

Problem

In handlers, i.e.:

@kopf.on.update("my_api_group", "v1", "my_resource", timeout=600)
async def my_on_update(
    namespace: str,
    name: str,
    patch: kopf.Patch,
    status: kopf.Status,
    diff: kopf.Diff,
    **_kwargs,
):
    ...

is there a way to know when the timeout of the handler actually happens (or any other PermanentError), to, i.e., get notified about it? We would like to know when a handler fails permanently so we can take remedial actions. There doesn't seem to be a way to do that...

i.e. thinking of some sort of:

def my_error_handler(exc):
    ...

@kopf.on.update("my_api_group", "v1", "my_resource", timeout=600, on_error=my_error_handler)
async def my_on_update(
    namespace: str,
    name: str,
    patch: kopf.Patch,
    status: kopf.Status,
    diff: kopf.Diff,
    **_kwargs,
):
    ...

Thanks!

[nolar]

Hello. No, there is no such thing as handlers for handlers.

But you can replace the "out-of-the-box" timeout= with your own implementation:

• https://kopf.readthedocs.io/en/stable/kwargs/#retrying-and-timing

import kopf, datetime, contextlib

@kopf.on.update("my_api_group", "v1", "my_resource", )
async def my_on_update(
    runtime: datetime.timedelta,
    retry: int,
    **_,
):
    if runtime >= datetime.timedelta(minutes=5) or retry >= 10:
        with contextlib.suppress(Exception):  # to prevent retries in case of errors in the error handler
            my_error_handler(...)
        raise kopf.PermanentError("Timed out or out of retries.")
    ...

You can make this into your own decorator if you wish.