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How to Prevent a Common Failure when Upgrading etcd v3.5 to v3.6

calendar_today March 26, 2025 person domain etcd

Update (October 21, 2025) We have identified and fixed two additional upgrade issues. Please see our new blog posts Follow Up - Preventing Upgrade Failures from etcd v3.5 to v3.6 and Avoiding Zombie Cluster Members When Upgrading for details. There is a common issue 19557 in the etcd v3.5 to v3.6 upgrade that may cause the upgrade process to fail.

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