SSH not working to OpenShift Container Platform - Node running on Azure after updating to OpenShift Container Platform 4.7.18 or 4.6.38

Solution Verified - Updated -

Issue

  • When ssh to any of our Openshift nodes, the session just hangs - we don't get a shell. This is happening on OCP 4.7.18 running on Azure. Running ssh -vvv ... shows the below error.

    [...]
    debug3: Ignored env _fzf_orig_completion_rm
    debug3: Ignored env LESSOPEN
    debug3: Ignored env _
    debug2: channel 0: request shell confirm 1
    debug3: send packet: type 98
    debug2: channel_input_open_confirmation: channel 0: callback done
    debug2: channel 0: open confirm rwindow 0 rmax 32768
    debug3: receive packet: type 100
    debug2: channel_input_status_confirm: type 100 id 0
    PTY allocation request failed on channel 0
    debug2: channel 0: rcvd adjust 2097152
    debug3: receive packet: type 99
    [...]
    
  • SSH not working to OpenShift Container Platform - Node running on Azure after updating to OpenShift Container Platform 4.7.18 or 4.6.38

  • Can't SSH into RHCOS nodes

Environment

  • Red Hat OpenShift Container Platform (OCP) 4.6.38+ and 4.7.18+
  • Microsoft Azure

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