THIS IS NOT LONGER NEEDED. NATIVE SUPPROT EXISTS IN THE PLATFORM

OCP 4.x support for PTP

Linuxptp is an implementation of the Precision Time Protocol (PTP) according to IEEE standard 1588v2 for Linux. This is a DaemonSet to support PTP in OCP4.x.

Installing

• Apply MachineConfig to load ptp Kernel module

  # Note: Update to match the worker type. By default using 'worker-rt'
  oc create -f ./assets/manifests/00_98-worker-rt-ptp.yaml
  

• Build or download the DaemonSet Container and upload to local container repo To build the image:

  # NOTE: When using the UBI image a RHEL node with valid subscription is required for the linuxptp package
  # if not in a RHEL node, use the Dockerfile.fedora can be used.
  podman build -t bastion.example.com:5000/ocp4x/ptp:4.1 -f Dockerfile.ubi
  podman push bastion.example.com:5000/ocp4x/ptp:4.1
  

  To download the image:

  podman pull quay.io/redhat/ptp
  podman tag quay.io/redhat/ptp bastion.example.com:5000/ocp4x/ptp:4.1
  podman push bastion.example.com:5000/ocp4x/ptp:4.1
  

• Create namespace and RBACs

  oc create -f ./assets/manifests/01_namespace.yaml
  oc create -f ./assets/manifests/02_serviceaccount.yaml
  oc create -f ./assets/manifests/03_rbac.yaml
  

• Update DaemonSet ConfigMap and Deploy DaemonSet

  # Edit ConfigMap with the required options
  # For valid options -- https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/system_administrators_guide/sec-using_ptp
  vi ./assets/manifests/04_daemonset.yaml
  oc create -f ./assets/manifests/04_daemonset.yaml
  

• Testing PTP sync - in one of the nodes execute

  chronyc sources
  

Credits

Some PTP reference ideas from: https://zshisite.wordpress.com/author/zshiredhat/