Help Center/ Cloud Container Engine/ User Guide (ME-Abu Dhabi Region)/ Clusters/ Upgrading a Cluster/ Troubleshooting for Pre-upgrade Check Exceptions/ Node Configuration Consistency
Updated on 2024-01-04 GMT+08:00
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Node Configuration Consistency

Check Items

When you upgrade a cluster to v1.19 or later, the system checks whether the following configuration files have been modified on the backend:

  • /opt/cloud/cce/kubernetes/kubelet/kubelet
  • /opt/cloud/cce/kubernetes/kubelet/kubelet_config.yaml
  • /opt/cloud/cce/kubernetes/kube-proxy/kube-proxy
  • /etc/containerd/default_runtime_spec.json
  • /etc/sysconfig/docker
  • /etc/default/docker
  • /etc/docker/daemon.json

If you modify some parameters in these files, the cluster upgrade may fail or services may be abnormal after the upgrade. If you confirm that the modification does not affect services, continue the upgrade.

CCE uses the standard image script to check node configuration consistency. If you use other custom images, the check may fail.

The expected modification will not be intercepted. The following table lists the parameters that can be modified.

Table 1 Parameters that can be modified

Component

Configuration File

Parameter

Upgrade Version

kubelet

/opt/cloud/cce/kubernetes/kubelet/kubelet_config.yaml

cpuManagerPolicy

Later than v1.19

kubelet

/opt/cloud/cce/kubernetes/kubelet/kubelet_config.yaml

maxPods

Later than v1.19

kubelet

/opt/cloud/cce/kubernetes/kubelet/kubelet_config.yaml

kubeAPIQPS

Later than v1.19

kubelet

/opt/cloud/cce/kubernetes/kubelet/kubelet_config.yaml

kubeAPIBurst

Later than v1.19

kubelet

/opt/cloud/cce/kubernetes/kubelet/kubelet_config.yaml

podPidsLimit

Later than v1.19

kubelet

/opt/cloud/cce/kubernetes/kubelet/kubelet_config.yaml

topologyManagerPolicy

Later than v1.19

kubelet

/opt/cloud/cce/kubernetes/kubelet/kubelet_config.yaml

resolvConf

Later than v1.19

kubelet

/opt/cloud/cce/kubernetes/kubelet/kubelet_config.yaml

eventRecordQPS

Later than v1.21

kubelet

/opt/cloud/cce/kubernetes/kubelet/kubelet_config.yaml

topologyManagerScope

Later than v1.21

kubelet

/opt/cloud/cce/kubernetes/kubelet/kubelet_config.yaml

allowedUnsafeSysctls

Later than v1.19

Docker

/etc/docker/daemon.json

dm.basesize

Later than v1.19

Solution

If you modify some parameters in these files, exceptions may occur after the upgrade. If you are not sure whether the modified parameters will affect the upgrade, contact technical support.