PTP monitoring reported compute lock to controller with zero skew
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
StarlingX |
Fix Released
|
High
|
Alexander Kozyrev |
Bug Description
Brief Description
-----------------
In PTP timestamping nodes lock to a remote grandmaster and report and ever changing sampled deviation from that reference.
The collectd PTP plugin records PTP timestamp deviations as samples in the database.
Severity
--------
Major
Steps to Reproduce
------------------
Configure PTP timestamp monitoring.
Beyond that how to create this issue is unknown.
Suspect something to do with the grandmaster going out of service.
Expected Behavior
------------------
Correct timestamp deviation sampling
Actual Behavior
----------------
Timestamp deviation of zero is seen and sampled.
Would expect a no lock alarm in this case.
Reproducibility
---------------
Seen once after incorrect PTP provisioning steps (see LP 1823975)
System Configuration
-------
Multi-node system
Branch/Pull Time/Commit
-------
2019-04-07 23:30:01 +0000
Last Pass
---------
n/a
Timestamp/Logs
--------------
n/a
Test Activity
-------------
Feature test
tags: | added: in-r-stx20 |
compute- 0_20190409. 135329/ var/log/ daemon. log:2019- 04-09T13: 36:01.301 compute-0 collectd[10713]: info ptp plugin compute-0 is collecting samples [ 0] with Grand Master 001e67.fffe.38c3e4 0_20190409. 135329/ var/log/ daemon. log:2019- 04-09T13: 46:01.301 compute-0 collectd[10713]: info ptp plugin compute-0 is collecting samples [ 0] with Grand Master 001e67.fffe.38c3e4
compute-
compute- 1_20190409. 135329/ var/log/ daemon. log:2019- 04-09T13: 36:12.310 compute-1 collectd[12434]: info ptp plugin compute-1 is collecting samples [ 0] with Grand Master 001e67.fffe.38c3e4 1_20190409. 135329/ var/log/ daemon. log:2019- 04-09T13: 46:12.310 compute-1 collectd[12434]: info ptp plugin compute-1 is collecting samples [ 0] with Grand Master 001e67.fffe.38c3e4
compute-