Any advice to get the orphan mode working? I *think* this might be the option I need but I'm not positive. Alternatively I could delete the local directive on my two servers but I don't think that's quite right either since none of the other clients/servers would select a source if both GPS are offline.
On Wed, Jan 22, 2025 at 9:53 AM William Bergen <wbergen@lynk.world> wrote: > > In SC06 there is "GPS A & B disagree" and "GPS B is inactive". How can > > they disagree when only one is working? > > Ah my apologies, I made a mistake with the table. SC06 has both GPS > sources active but their measurements disagree. This is an edge case but it > has happened in practice. > > > Is the server trying to poll itself? What is that supposed to do? > > I had this in there hoping that it would help Server A resolve its local > refid in orphan mode. It doesn't seem to have helped. It was my > understanding that chrony will ignore servers that resolve to the > localhost. I will remove those lines if they are useless. > > > Which scenarios break when you don't use any of the trust options? > > Without the trust options in place, I'm unable to meet SC06 since the > clients won't select a server, Server B will select GPS B as its source. > > > That indicates chronyd doesn't know the local IP address for the orhan > > source. Is it running on normal Linux? Can you check strace if > > received messages have the IP_PKTINFO cmsg? > > The server computers are raspberry pi 4s running raspbian buster. Chrony > version info: > ``` > $ chronyd -v > chronyd (chrony) version 3.4 (+CMDMON +NTP +REFCLOCK +RTC +PRIVDROP > +SCFILTER +SIGND +ASYNCDNS +SECHASH +IPV6 -DEBUG) > ``` > I am seeing some syscalls to `recvmmsg` with the IP_PKTINFO cmsg type. > > > > On Wed, Jan 22, 2025 at 3:43 AM Miroslav Lichvar <mlich...@redhat.com> > wrote: > >> On Tue, Jan 21, 2025 at 04:28:00PM -0500, William Bergen wrote: >> > I’ve been spending quite a bit of time trying to configure the system to >> > meet my needs but I can’t seem to satisfy every scenario >> simultaneously. I >> > know this is complicated by the fact that there are only 2 servers in >> the >> > network. I’ve tried to compile my requirements into a table of scenarios >> > and desired outcomes. >> > [image: scenarios.png] >> >> In SC06 there is "GPS A & B disagree" and "GPS B is inactive". How can >> they disagree when only one is working? >> >> > So far, my biggest trouble has been meeting SC04 AND SC06 with the same >> > configuration. This is where I’m at right now with the relevant >> sections of >> > the configuration: >> > Server A >> > >> > rtcsyncallow 192.168.5 >> > local stratum 10 orphan >> > makestep 1 -1 >> > refclock SHM 0 refid GPS delay 0.2 trust >> > server 192.168.5.1 >> >> Is the server trying to poll itself? What is that supposed to do? >> >> Which scenarios break when you don't use any of the trust options? >> >> > This config setup is the closest I have gotten to achieving my desired >> > outcomes. I thought that the orphan option for the local refclock was >> > correct in this scenario but I keep receiving an error when testing >> > SC05: Unknown >> > local refid in orphan mode. >> >> That indicates chronyd doesn't know the local IP address for the orhan >> source. Is it running on normal Linux? Can you check strace if >> received messages have the IP_PKTINFO cmsg? >> >> -- >> Miroslav Lichvar >> >> >> -- >> To unsubscribe email chrony-users-requ...@chrony.tuxfamily.org >> with "unsubscribe" in the subject. >> For help email chrony-users-requ...@chrony.tuxfamily.org >> with "help" in the subject. >> Trouble? Email listmas...@chrony.tuxfamily.org. >> >>
