Help Center/ Cloud Container Engine/ User Guide/ Clusters/ Upgrading a Cluster/ Troubleshooting for Pre-upgrade Check Exceptions

Updated on 2025-09-04 GMT+08:00

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Troubleshooting for Pre-upgrade Check Exceptions

Pre-upgrade Check

Node Restrictions

Upgrade Management

Add-ons

Helm Charts

Node Pools

Security Groups

Residual Nodes

Discarded Kubernetes Resources

Compatibility Risks

CCE Agent Versions

Node CPU Usage

Node Disks

Node DNS

Node Key Directory File Permissions

kubelet

Node Memory

Node Clock Synchronization Server

Node OS

Node CPU Cores

Node Python Commands

ASM Version

Node Readiness

Node journald

containerd.sock

Internal Error

Node Mount Points

Kubernetes Node Taints

Everest Restrictions

cce-hpa-controller Limitations

Enhanced CPU Policies

Health of Worker Node Components

Health of Master Node Components

Memory Resource Limit of Kubernetes Components

Discarded Kubernetes APIs

NetworkManager

Node ID File

Node Configuration Consistency

Node Configuration File

CoreDNS Configuration Consistency

sudo

Key Node Commands

Mounting of a Sock File on a Node

HTTPS Load Balancer Certificate Consistency

Node Mounting

Login Permissions of User paas on a Node

Private IPv4 Addresses of Load Balancers

Historical Upgrade Records

CIDR Block of the Cluster Management Plane

CCE AI Suite (NVIDIA GPU) Exceptions

Nodes' System Parameters

Residual Package Version Data

Node Commands

Node Swap

NGINX Ingress Controller

Upgrade of Cloud Native Cluster Monitoring

containerd Pod Restart Risks

Key CCE AI Suite (NVIDIA GPU) Parameters

GPU or NPU Pod Rebuild Risks

ELB Listener Access Control

Subnet Quota of Master Nodes

Node Runtime

Node Pool Runtime

Number of Node Images

OpenKruise Compatibility Check

Compatibility Check of At-Rest Encryption for Secrets

Compatibility Between the Ubuntu Kernel and GPU Driver

Drainage Tasks

Image Layers on a Node

Cluster Rolling Upgrade

Rotation Certificates

Ingress and ELB Configuration Consistency

Network Policies of Cluster Network Components

Cluster and Node Pool Configurations

Time Zone of Master Nodes

SNATIPRanges

Add-on Configuration Consistency

Parent Topic: Upgrading a Cluster

Previous topic: Migrating Services Across Clusters of Different Versions

Next topic: Pre-upgrade Check

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