KB 433183: Fix VKS Cluster Upgrades Blocked by “SystemChecksSucceeded condition is not True”

This article provides a detailed runbook for resolving VMware Kubernetes (VKS) cluster upgrade failures blocked by the 'SystemChecksSucceeded condition is not True' error. It explains that the blocker is a guardrail preventing upgrades when PodDisruptionBudgets (PDBs) allow zero disruptions or third-party admission webhooks may block critical system pods. The article advises treating the condition as a routing signal, diagnosing from the Supervisor context, remediating the exact blocker, and confirming readiness before retrying. It includes operational best practices, such as repairing workloads first, avoiding deletion of VMware webhooks, and using dangerous-skip annotations only with support. This is a technical IT operations guide for Kubernetes administrators.