Force setting pre-vote flag even if it uses default value.

[joshuazh-x]

Please read https://github.com/etcd-io/etcd/blob/main/CONTRIBUTING.md#contribution-flow.

Ref #17455

[k8s-ci-robot]

Hi @joshuazh-x. Thanks for your PR.

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[serathius]

Not sure about the proposed approach, we don't want to set --pre-vote everywhere, just in robustness test. Please consider adding it to baseOptions

etcd/tests/robustness/scenarios.go

Lines 75 to 81 in 5c311d5

	baseOptions := []e2e.EPClusterOption{
	options.WithSnapshotCount(50, 100, 1000),
	options.WithSubsetOptions(randomizableOptions...),
	e2e.WithGoFailEnabled(true),
	e2e.WithCompactionBatchLimit(100),
	e2e.WithWatchProcessNotifyInterval(100 * time.Millisecond),
	}

[joshuazh-x]

Not sure about the proposed approach, we don't want to set --pre-vote everywhere, just in robustness test. Please consider adding it to baseOptions

etcd/tests/robustness/scenarios.go

Lines 75 to 81 in 5c311d5

	baseOptions := []e2e.EPClusterOption{
	options.WithSnapshotCount(50, 100, 1000),
	options.WithSubsetOptions(randomizableOptions...),
	e2e.WithGoFailEnabled(true),
	e2e.WithCompactionBatchLimit(100),
	e2e.WithWatchProcessNotifyInterval(100 * time.Millisecond),
	}

Simply adding an option to change prevote does not work, because any option same as the default one will be ignored.
Set --pre-vote with default value is equivalent to skipping it so I believe it won't cause any problem.

[serathius]

Right, forgot that now e2e framework uses defaults on the main branch to decide what flags to pass. Good find!

[joshuazh-x]

Fix goword check failure.

[serathius]

cc @ahrtr

[serathius]

Long term we might consider hardcoding differences between defaults on previous releases, however this should be a good solution for now.

[ahrtr]

Pls see my comment #17455 (comment)