Cluster controlplane error RHEL7 CentOS7 nodes

This document (000019957) is provided subject to the disclaimer at the end of this document.




Docker version or newer stopped working on downstream cluster RHEL 7.9 nodes,

Docker gets stalled and unresponsive, after setting the newer Kubernetes version in Rancher UI on the downstream cluster for upgrade of Kubernetes to  v1.17.4 from v1.16.8 on RHEL 7.9

Error message in Rancher UI:
"Cannot proceed with the upgrade of controlplain since 1 host(s) cannot reached prior to upgrade"

Rancher v2.4.11 or newer
Node RHEL 7.9
Docker version
Kubernetes v1.16.8


- Downgrade docker to Version (from Version or
- Remove all files from /var/lib/docker/containers
- Rejoining the nodes with the command line from Rancher UI

The node will join the cluster and upgrade to the cluster set Kubernetes  v1.17.4
on all nodes, one by one.


Docker not working

Additional Information



This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

  • Document ID:000019957
  • Creation Date: 04-May-2021
  • Modified Date:14-May-2021
    • SUSE Rancher

< Back to Support Search

For questions or concerns with the SUSE Knowledgebase please contact: tidfeedback[at]

SUSE Support Forums

Get your questions answered by experienced Sys Ops or interact with other SUSE community experts.

Join Our Community

Support Resources

Learn how to get the most from the technical support you receive with your SUSE Subscription, Premium Support, Academic Program, or Partner Program.

SUSE Customer Support Quick Reference Guide SUSE Technical Support Handbook Update Advisories
Support FAQ

Open an Incident

Open an incident with SUSE Technical Support, manage your subscriptions, download patches, or manage user access.

Go to Customer Center