g2020sudo/ptp

PTP made easy using a Docker container

PTP

PTP made easy using a Docker container. This repo uses PTP4L daemon as-is from http://git.code.sf.net/p/linuxptp/code.

Pre-Reqs

• You need the latest Docker version installed.

Building the Docker Container for PTP4L

• In the ptp folder execute:

sudo docker build -f ./Dockerfile.ptp -t ptp4l:1.0 .

Running the Docker Container for 'PTP as a Client'

• Start in the repo ptp folder

• Disable Ubuntu 20.04 time sync service"

sudo systemctl stop systemd-timesyncd
sudo systemctl status systemd-timesyncd

• Start PTP as a Client

If you DO NOT have an 802.1AS network switch execute:
sudo docker run -d --privileged -it --rm -v pwd/default.cfg/:/configs/default.cfg -v pwd/start-ptp-client.sh:/scripts/start-ptp.sh --net host ptp4l:1.0 bash -c "/scripts/start-ptp.sh"

If you DO have an 802.1AS network switch execute:
docker run -d --privileged -it --rm -v pwd/gPTP.cfg/:/configs/default.cfg -v pwd/start-ptp-client.sh:/scripts/start-ptp.sh --net host ptp4l:1.0 bash -c "/scripts/start-ptp.sh"

Running the Docker Container for 'PTP as the Primary (master)'

• Start in the repo ptp folder

• Disable Ubuntu 20.04 time sync service

sudo systemctl stop systemd-timesyncd
sudo systemctl status systemd-timesyncd

• Start PTP as a Primary

If you do not have a 802.1AS network switch execute:
echo "Start PTP using default config which doesn't require 802.1AS switch docker run -d --privileged -it --rm -v pwd/default.cfg/:/configs/default.cfg -v pwd/start-ptp-primary.sh:/scripts/start-ptp-primary.sh --net host ptp4l:1.0 bash -c "/scripts/start-ptp-primary.sh"

If you DO have an 802.1AS network swtich execute:
echo "Start PTP-SW (not all devices support PTP in HW)" docker run -d --privileged -it --rm -v pwd/gPTP.cfg/:/configs/default.cfg -v pwd/start-ptp-primary.sh:/scripts/start-ptp-primary.sh --net host ptp4l:1.0 bash -c "/scripts/start-ptp-primary.sh"

Verify the Docker Container and PTP4L are running and are healthy

• Get the running container ID using: sudo docker ps
• sudo docker logs running container ID
• Results should not show "Waiting for PTP". If this occuring then PTP is not working. Results should show offsets between PHC/system time and GM