Answer
API servers rely on etcd quorum; without quorum, writes stop to avoid inconsistent cluster state.
Quick Answer
Kubernetes uses etcd's Raft consensus — writes are only committed when a majority (quorum) of etcd members agree. With 3 control plane nodes, 2 must agree. If the network splits into two halves, the side without quorum can't accept writes — it becomes read-only. This prevents split-brain by design. Three or five control plane nodes ensure quorum survives one or two failures.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
Want to bookmark, take notes, or join discussions?
Sign in to access all features and personalize your learning experience.
Source: SugharaIQ