Openshift cluster using libreswan for ipsec communication randomly stops working?

Solution In Progress - Updated -

Issue

  • Openshift is using libreswan opportunistic VPN for nodes communication. Sometime it fails to communicate and just restarting it fix the issue for sometime.

Environment

  • Red Hat Enterprise Linux 7.X
  • Libreswan before 3.25-8.1.el7_7
  • Red Hat Enterprise Linux 8.X
  • Libreswan before 3.29-6.el8

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