Hi Joel, Thanks for the reply :)
I did give a try to the Openshift PTP operator and works well aside from the fact that I can't use it here since I'm not running on Baremetal. Our cluster indeed runs on our in-house Openstack platform. Usually we use the KVM PTP module with something like: refclock PHC /dev/ptp0 poll 2 In the chrony.conf file. But that's for our usual CentOs based VMs, not FCOS :/ So now I'm just trying to reproduce that setup on FCOS. I found this Fedora documentation earlier about PTP https://docs.fedoraproject.org/en-US/fedora/rawhide/system-administrators-guide/servers/Configuring_PTP_Using_ptp4l/ Where they mention this linuxptp package, hence my questions. If I can't manage this, I'll resort to using standard NTP instead of PTP. Best, Benjamin De: "Joel Pearson" <japear...@agiledigital.com.au> À: "Benjamin Guillon" <benjamin.guil...@cc.in2p3.fr> Cc: "users" <users@lists.openshift.redhat.com> Envoyé: Mercredi 28 Octobre 2020 12:56:19 Objet: Re: Installing packages on OKD 4 nodes Ahh I found the support article that talks about OpenShift 4 and PTP [ https://access.redhat.com/solutions/5106141 | https://access.redhat.com/solutions/5106141 ] If you don't have access to that solution the crux of it is that the PTP operator is for baremetal nodes (so probably not you, as you mentioned OpenStack). The chrony config they mention is: $ cat << EOF | base64 -w0 refclock PHC /dev/ptp0 poll 3 dpoll -2 offset 0 driftfile /var/lib/chrony/drift makestep 1.0 3 rtcsync logdir /var/log/chrony EOF On Wed, 28 Oct 2020 at 22:32, Joel Pearson < [ mailto:japear...@agiledigital.com.au | japear...@agiledigital.com.au ] > wrote: Hi Benjamin, Have you checked if you actually need it? At least enterprise openshift 4.x already had ptp support in the kernel (without a module), as I bumped into it earlier in the year for PTP Azure syncing, I opened a support ticket and it turned out I just needed this in chrony.conf refclock PHC /dev/ptp0 poll 3 dpoll -2 offset 0 So I think it'd be worth checking if you already have /dev/ptp0 available before installing linuxptp. I realise OKD uses Fedora Core OS instead of RedHat Core OS, so the default kernel modules might be different. Here are some docs for [ https://docs.okd.io/latest/installing/install_config/installing-customizing.html#installation-special-config-crony_installing-customizing | configuring chrony ] , I think you just need to switch the iburst line for the refclock one. Otherwise, if the PTP support you need is more complicated than I needed on Azure, you could potentially look at the specific [ https://docs.okd.io/latest/networking/multiple_networks/configuring-ptp.html | PTP operator ] in the OKD docs. Hope this helps. Thanks, Joel On Sat, 24 Oct 2020 at 03:00, Benjamin Guillon < [ mailto:benjamin.guil...@cc.in2p3.fr | benjamin.guil...@cc.in2p3.fr ] > wrote: BQ_BEGIN Hello, I'm deploying an OKD4 cluster on Openstack. I wish to configure NTP on my nodes and for that I need to install a PTP dependency: linuxptp. And enable the kvm_ptp module in the kernel. However, I couldn't manage to install the package through ignition. I had to do it manually with rpm-ostree: rpm-ostree install linuxptp. Am I missing something here? How am I supposed to provide packages or drivers cluster wide through Ignition? Can such a task be done through the MachineConfig Operator? Thanks for the help! -- Benjamin Guillon CNRS/IN2P3 Computing Center 21 Avenue Pierre de Coubertin, CS70202 69627 Villeurbanne Cedex, France _______________________________________________ users mailing list [ mailto:users@lists.openshift.redhat.com | users@lists.openshift.redhat.com ] [ http://lists.openshift.redhat.com/openshiftmm/listinfo/users | http://lists.openshift.redhat.com/openshiftmm/listinfo/users ] BQ_END
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