Disable the SSH host key or System related logs from printing on the console/terminals in RHCOS

Solution Verified - Updated -

Issue

  • How to disable the unnecessary log entries (noise) in IBM Z operlog printing the login banner on the RHCOS worker nodes like:
"SSH host key: SHA256:5/BSBVwnpE4QPv0QoKwn8MY6+cVbWZF6pDCS8z7+Lrc (ECDSA)" VID=*
"SSH host key: SHA256:i8bn8pq9pJ2FJ/+NftxkwDAD4HN8gnxmUy1D9oJkqCA (ED25519)" VID
"SSH host key: SHA256:tqAG5nHN8bp2X/gws6Zl3HQpbHzkNxNoRCXSpfirwkQ (RSA)" VID=*MS
"enc600: x.x.x.x " VID=*MSG     SRC=MASIUCV  CLS=8
"wr1sa004 login: " VID=*MSG     SRC=MASIUCV  CLS=8

Environment

  • Red Hat OpenShift Container Platform (RHOCP)
    • 4
  • Red Hat CoreOS (RHCOS)

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