Ability of configuring `min.insync.replica` for kminion end to end topic

[shk3]

Hi,

Is it something wanted to allow configure the minISR parameter on the end to end topic? It looks like the minISR is currently set through a hard-coded logic (see the code reference below). In our use case, we use the end to end topic as a probe to identify Kafka issues, and we would have replication factor 3 while keeping minISR as 1 in order to allow N+2 availability. Ideally, the probe should be able to reproduce the same setup.

If the customization feature is wanted, I could contribute a PR. Thanks!

kminion/e2e/topic.go

Lines 391 to 397 in ea8e76a

	minISR := 1
	if cfgTopic.ReplicationFactor >= 3 {
	// Only with 3+ replicas does it make sense to require acks from 2 brokers
	// todo: think about if we should change how 'producer.requiredAcks' works.
	// we probably don't even need this configured on the topic directly...
	minISR = 2
	}