Sunday, May 17, 2020

A few simple Tips on Kubernetes

  • Core DNS is deployment and Flannel is DaemonSet
  • Persistent Volume (PV)  is not under the namespace
  • Persistent Volume Claim(PVC) is under the namespace
  • Delete PVC will delete PV automatically by default (Oracle Kubernetes Engine). Change retain policy if necessary
  • Drain the node before rebooting worker node
  • Both TCP and UDP must be open in the worker node subnet.
  • If UDP is open after VMs are up and running, we may need to recreate VMs to let docker daemon to work with new settings

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