Building with systemd support?

[wkharold]

I just upgraded to flux-core v0.51.0 (on Google Cloud) the build went as expected but when I start flux it fails with the error:

broker: broker.sd_notify is set but Flux was not built with systemd support.: No such file or directory

libsystemd is present (/usr/lib64/libsystemd.so.0.23.0) and flux-core v0.49.0 worked fine. Is there a new switch required to explicitly build with systemd support?

[garlick]

Ah sorry about that.

When configuring flux, the libsystemd development package would also need to be present so it can find the pkg-config file. I assume that's why flux is reporting that it wasn't built with systemd support?

The systemd unit file adds the -Sbroker.sd_notify=1 option to the broker command line so if you like you could just drop that, but if you can rebuild with systemd support, then you can get more information from systemctl status, e.g. the "leader" line below. During startup that message reflects the current broker status, so if it gets stuck, the idea is that it might be helpful:

flux.service - Flux message broker
     Loaded: loaded (/lib/systemd/system/flux.service; enabled; vendor preset: >
     Active: active (running) since Mon 2023-06-26 08:52:51 PDT; 2 days ago
    Process: 518 ExecStartPre=/usr/bin/loginctl enable-linger flux (code=exited>
    Process: 657 ExecStartPre=bash -c systemctl start user@$(id -u flux).servic>
   Main PID: 862 (flux-broker-0)
     Status: "Running as leader of 8 node Flux instance"
      Tasks: 20 (limit: 8755)
     Memory: 95.7M
        CPU: 3min 50.718s
     CGroup: /system.slice/flux.service
             └─862 broker --config-path=/etc/flux/system/conf.d -Scron.director>

Jun 26 08:52:54 picl0 flux[862]: broker.info[0]: rc1.0: running /etc/flux/rc1.d>
Jun 26 08:52:54 picl0 flux[862]: sched-fluxion-resource.info[0]: version 0.25.0>
Jun 26 08:52:54 picl0 flux[862]: sched-fluxion-resource.warning[0]: create_read>
Jun 26 08:52:54 picl0 flux[862]: sched-fluxion-resource.info[0]: populate_resou>
Jun 26 08:52:54 picl0 flux[862]: sched-fluxion-qmanager.info[0]: version 0.25.0>
Jun 26 08:52:54 picl0 flux[862]: broker.info[0]: rc1.0: running /etc/flux/rc1.d>
Jun 26 08:52:55 picl0 flux[862]: broker.info[0]: rc1.0: /etc/flux/rc1 Exited (r>
Jun 26 08:52:55 picl0 flux[862]: broker.info[0]: rc1-success: init->quorum 4.34>
Jun 26 08:52:55 picl0 flux[862]: broker.info[0]: online: picl0 (ranks 0)
Jun 26 08:52:55 picl0 flux[862]: broker.info[0]: quorum-full: quorum->run 0.

[wkharold]

I thought it might be something like that; I added systemd-devel to the list of installed packages and it all works as advertised.

Thanks!

[garlick]

NP! Cheers!