Comment on Ask HN: Those running K8s in house, can you please explain your architecture?parentComments−dvfjsdhgfv2ywhy etcd NEEDS more than 2The consensus algorithm (Raft in this case) requires that a majority agrees, so you need to have an odd number of nodes (and 1 wouldn't make sense, hence 3 is the minimum, and in practice works very well).
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The consensus algorithm (Raft in this case) requires that a majority agrees, so you need to have an odd number of nodes (and 1 wouldn't make sense, hence 3 is the minimum, and in practice works very well).