'etcd - is the leader node automatically and dynamically elected? newbie question

It's been about several hours since I am actively looking into etcd and I have a newbie question:

Is the leader node dynamically and automatically elected or the "human" operator of the cluster must take action?

If yes, then what are the conditions that must be met in order to begin the election of a new leader node?

If no, then what should be done?



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