Configurable logging

[christian-schlichtherle]

TL;DR

Is there a way to configure the logging output? I'm operating a hybrid K3s cluster where the majority of the nodes are IoT devices that are connected to networks at customer premises. So hccm is complaining every five minutes that it can't find these IoT devices (of course). I would like to suppress these logging messages as they are just noise which puts some stress on the I/O subsystem, especially as the number of IoT devices is growing larger and larger.

Expected behavior

Here's a sample message:

E0906 15:39:08.530539       1 node_controller.go:281] Error getting instance metadata for node addresses: hcloud/instancesv2.InstanceMetadata: failed to get instance metadata: no matching server found for node 'zulu-d1': server not found

I'ld expect no logging output generated when a node is not located in a Hetzner network.

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