PTP Operator

Table of Contents

• PTP Operator
• PtpOperatorConfig
• PtpConfig
• Quick Start

PTP Operator

Ptp Operator, runs in openshift-ptp namespace, manages cluster wide PTP configuration. It offers PtpOperatorConfig and PtpConfig CRDs and creates linuxptp daemon to apply node-specific PTP config.

PtpOperatorConfig

Upon deployment of PTP Operator, it automatically creates a default custom resource of PtpOperatorConfig kind which contains a configurable option daemonNodeSelector, it is used to specify which nodes linuxptp daemon shall be created on. The daemonNodeSelector will be applied to linuxptp daemon DaemonSet nodeSelector field and trigger relaunching of linuxptp daemon. Ptp Operator only recognizes default PtpOperatorConfig, use oc edit PtpOperatorConfig default -n openshift-ptp to update the daemonNodeSelector.

$ oc get ptpoperatorconfigs.ptp.openshift.io default -n openshift-ptp -o yaml

apiVersion: v1
items:
- apiVersion: ptp.openshift.io/v1
  kind: PtpOperatorConfig
  metadata:
    creationTimestamp: "2019-10-28T06:53:09Z"
    generation: 3
    name: default
    namespace: openshift-ptp
    resourceVersion: "2356742"
    selfLink: /apis/ptp.openshift.io/v1/namespaces/openshift-ptp/ptpoperatorconfigs/default
    uid: d7286542-34bd-4c79-8533-d01e2b25953e
  spec:
    daemonNodeSelector: {}
kind: List
metadata:
  resourceVersion: ""
  selfLink: ""

Enable PTP events via fast event framework

PTP Operator supports fast event publisher for events such as PTP state change, os clock out of sync, clock class change and port failure. Event publisher is enabled by deploying PTP operator with cloud events framework (based on O-RAN API specifications). The events are published via HTTP or AMQP transport and available for local subscribers.

Enabling fast events

$ oc edit ptpoperatorconfigs.ptp.openshift.io default -n openshift-ptp

apiVersion: v1
items:
- apiVersion: ptp.openshift.io/v1
  kind: PtpOperatorConfig
  metadata:
    creationTimestamp: "2019-10-28T06:53:09Z"
    generation: 4
    name: default
    namespace: openshift-ptp
    resourceVersion: "2364095"
    selfLink: /apis/ptp.openshift.io/v1/namespaces/openshift-ptp/ptpoperatorconfigs/default
    uid: d7286542-34bd-4c79-8533-d01e2b25953e
  spec:
    ptpEventConfig:
      enableEventPublisher: true
      transportHost: "http://ptp-event-publisher-service-NODE_NAME.openshift-ptp.svc.cluster.local:9043"
      storageType: local-sc
    daemonNodeSelector:
      node-role.kubernetes.io/worker: ""
kind: List
metadata:
  resourceVersion: ""
  selfLink: ""

PtpConfig

PtpConfig CRD is used to define linuxptp configurations and to which node these linuxptp configurations shall be applied. The Spec of CR has two major sections. The first section profile contains interface, ptp4lOpts, phc2sysOpts and ptp4lConf options, the second recommend defines profile selection logic.

 PTP operator supports T-BC and Ordinary clock which can be configured via ptpConfig

ptpConfig to set up ordinary clock using single interface

NOTE: following ptp4l/phc2sys opts required when events are enabled 
    ptp4lOpts: "-2 -s --summary_interval -4" 
    phc2sysOpts: "-a -r -m -n 24 -N 8 -R 16"

apiVersion: ptp.openshift.io/v1
kind: PtpConfig
metadata:
  name: ordinary-clock-ptpconfig
  namespace: openshift-ptp
spec:
  profile:
  - name: "profile1"
    interface: "enp134s0f0"
    ptp4lOpts: "-s -2"
    phc2sysOpts: "-a -r"
  recommend:
  - profile: "profile1"
    priority: 4
    match:
    - nodeLabel: "node-role.kubernetes.io/worker"

ptpConfig to set up boundary clock using multiple interface

NOTE: following ptp4l/phc2sys opts required when events are enabled 
    ptp4lOpts: "-2 --summary_interval -4" 
    phc2sysOpts: "-a -r -m -n 24 -N 8 -R 16"

apiVersion: ptp.openshift.io/v1
kind: PtpConfig
metadata:
  name: boundary-clock-ptpconfig
  namespace: openshift-ptp
spec:
  profile:
  - name: "profile1"
    ptp4lOpts: "-s -2"
    phc2sysOpts: "-a -r"
    ptp4lConf: |
      [ens7f0]
      masterOnly 0
      [ens7f1]
      masterOnly 1
      [ens7f2]
      masterOnly 1
  recommend:
  - profile: "profile1"
    priority: 4
    match:
    - nodeLabel: "node-role.kubernetes.io/worker"

ptpConfig to override offset threshold when events are enabled

apiVersion: ptp.openshift.io/v1
kind: PtpConfig
metadata:
  name: event-support-ptpconfig
  namespace: openshift-ptp
spec:
  profile:
  - name: "profile1"
    ...
    ...
    ......   
    ptpClockThreshold:
      holdOverTimeout: 24 # in secs
      maxOffsetThreshold: 100 #in nano secs
      minOffsetThreshold: 100 #in nano secs
  recommend:
  - profile: "profile1"
    priority: 4
    match:
    - nodeLabel: "node-role.kubernetes.io/worker"
    

ptpConfig to filter 'master offset' and 'delay filtered' logs

apiVersion: ptp.openshift.io/v1
kind: PtpConfig
metadata:
  name: suppress-logs-ptpconfig
  namespace: openshift-ptp
spec:
  profile:
  - name: "profile1"
    ...
    ...
    ......   
    ptpSettings:
      stdoutFilter: "^.*delay   filtered.*$"
      logReduce: "true"
  recommend:
  - profile: "profile1"
    priority: 4
    match:
    - nodeLabel: "node-role.kubernetes.io/worker"
    

ptpConfig to configure as WPC NIC as GM

apiVersion: ptp.openshift.io/v1
kind: PtpConfig
metadata:
  name: ptpconfig-gm
  namespace: openshift-ptp
spec:
  profile:
  - name: "profile1"
    ...
    ...
    ......   
    plugins:
      e810:
        enableDefaultConfig: true
    ts2phcOpts: " "
    ts2phcConf: |
      [nmea]
      ts2phc.master 1
      [global]
      use_syslog  0
      verbose 1
      logging_level 7
      ts2phc.pulsewidth 100000000
      #GNSS module s /dev/ttyGNSS* -al use _0
      ts2phc.nmea_serialport  /dev/ttyGNSS_1700_0
      # The `leapfile` directive below can be omitted.
      # leapfile  /usr/share/zoneinfo/leap-seconds.list
      [ens2f0]
      ts2phc.extts_polarity rising
      ts2phc.extts_correction 0
    synce4lOpts: " "
    synce4lConf: |
     [global]
     logging_level 7
     use_syslog 0
     verbose 1
     message_tag [synce4l]

     [<synce1>]
     dnu_prio 0xFF
     network_option 2
     extended_tlv 1
     recover_time 60
     clock_id 
     module_name ice

     [enp59s0f0np0]
     tx_heartbeat_msec 1000
     rx_heartbeat_msec 500
     allowed_qls 0x4
     allowed_ext_qls 0xFF
     [{SMA1}]
     board_label SMA1
     input_QL 0x1
     input_ext_QL 0x20
  recommend:
  - profile: "profile1"
    priority: 4
    match:
    - nodeLabel: "node-role.kubernetes.io/worker"
    

In above examples, profile1 will be applied by linuxptp-daemon to nodes labeled with node-role.kubernetes.io/worker.

xxx-ptpconfig CR is created with PtpConfig kind. spec.profile defines profile named profile1 which contains interface (enp134s0f0) to run ptp4l process on, ptp4lOpts (-s -2) sysconfig options to run ptp4l process with and phc2sysOpts (-a -r) to run phc2sys process with. spec.recommend defines priority (lower numbers mean higher priority, 0 is the highest priority) and match rules of profile profile1. priority is useful when there are multiple PtpConfig CRs defined, linuxptp daemon applies match rules against node labels and names from high priority to low priority in order. If any of nodeLabel or nodeName on a specific node matches with the node label or name where daemon runs, it applies profile on that node.

Automatic leap second file management

The T-GM system depends on having the most recent leap second information. This data comes in a file that shows the difference in seconds between Coordinated Universal Time (UTC) and International Atomic Time (TAI). This file is regularly updated by the International Earth Rotation and Reference Systems Service (IERS). The latest leap seconds file can be downloaded from https://hpiers.obspm.fr/iers/bul/bulc/ntp/leap-seconds.list. While the PTP operator container image includes the latest leap second information at build time, the system can automatically update the leap second file using announcements received through GPS to ensure it stays current.

How it works

The system initially uses leap second information included in the container during its creation. This information is stored in a resource called leap-configmap within the openshift-ptp namespace. This resource is mounted as a volume to the linuxptp-daemon pod. The file containing leap seconds is accessible by the ts2phc program. Additionally, GPS satellites broadcast leap second updates. If this information differs from what's stored, the leap-configmap is automatically updated with the newer GPS data. The ts2phc program picks the changes automatically.

Automatic leapfile updates rely on WPC NIC NAV-TIMELS notifications. This notification can be enabled or disabled in the E810 plugin section. Manual updates of the leap-configmap resource are not recommended.

ptpConfig to enable High Availability for phc2sys by adding profiles of ptp4l enabled config's under haProfiles

apiVersion: ptp.openshift.io/v1
kind: PtpConfig
metadata:
name: suppress-logs-ptpconfig
namespace: openshift-ptp
spec:
phc2sysOpts: "-a -r"
ptp4lOpts: " "
profile:
- name: "enable-ha"
  ...
  ...
  ......
  ptpSettings:
    stdoutFilter: "^.*delay   filtered.*$"
    logReduce: "true"
    haProfiles: "profile1,profile2"
  recommend:
- profile: "enable-ha"
  priority: 4
  match:
    - nodeLabel: "node-role.kubernetes.io/worker"

Requirements: Two ptp4l configurations must exist with the phc2sysOPts field set to an empty string. The names of these ptp4l configurations will be used and listed under the ptpSettings/haProfiles key in the phc2sys-only enabled ptpConfig.

Quick Start

To install PTP Operator:

$ make deploy

To un-install:

$ make undeploy