Unexpected log output from the init function when importing Karmada types

[williamburgson]

What happened:

Importing the karmada api types from pkg/apis/operator/v1alpha1 results in unwanted log line.

e.g.

I1125 19:35:50.978387      15 defaults.go:54] default Karmada Image Version: v0.0.0-master

What you expected to happen:

Kardama should either omit logs in the init function or log at debug level.

If the log lines are necessary then they should allow the logger to be configurable.

How to reproduce it (as minimally and precisely as possible):

simply import the types and unwanted logs will be printed

package main

import (
        "log/slog"

        "github.com/karmada-io/karmada/operator/pkg/apis/operator/v1alpha1"
)

var k = v1alpha1.Karmada{}

func main() {
        slog.Info("Expected output from slog")
}

Will output

$ go run main.go
I1129 17:47:21.437296  225428 defaults.go:54] default Karmada Image Version: v0.0.0-master
2025/11/29 17:47:21 INFO Expected output from slog

Configuring klog to use slog handler in this main.go example does not resolve the issue because the logging is done inside the init function of the package we are importing.

Anything else we need to know?:

Nope.

Environment:

• Karmada version: v1.14.0-alpha.1
• kubectl-karmada or karmadactl version (the result of kubectl-karmada version or karmadactl version): N/A
• Others: N/A

[RainbowMango]

Yes, printing such a log in an init function is not appropriate. How about silencing the log by changing the level to klog.V(4).Info?

By the way, another option for you is to import the operator API in karmada-io/api repo, which is a lightweight import source; there won't be this redundant log, and it won't introduce too many dependencies you actually don't need either.