DSM single node cluster unhealthy after powering cycle


Issue : DSM single node AWS cluster unhealthy after powering cycle 

affected version: DSM 4.4

Description:   After power cycle of single node DSM, Flannel pod enters crashloop state and not recovering.

Flannel pod log error : “Failed to create SubnetManager” 

Fix: usually cluster will be auto-recovered in 10-15mins. if not please follow the below steps.

Note: This issue is limited to a single-node setup due to a race condition with kubelet, kube proxy, and flannel

  1. systemctl stop kubelet
  2. wait 30-45 seconds
  3. systemctl start kubelet
  4. Restart the kube-proxy pod




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