duetpluginservice(-root) not starting....

[Chriss]

Hi *,

I just reimaged my pi with the latest duet raspi image which is connected to a Duet 3 MB6HC (1.0 or 1.01) but the two services "duetpluginservice" and "duetpluginservice-root" are not starting. The prompt does not come back when I try to start it manually with "systemctl start duetpluginservice.service".

The services are "dead" after a reboot":

root@blimy:~# systemctl | grep duet
  duetcontrolserver.service                                                                         loaded active     running         Duet Control Server
  duetpluginservice-root.service                                                                    loaded inactive   dead      start Duet Plugin Service (root)
  duetpluginservice.service                                                                         loaded inactive   dead      start Duet Plugin Service
  duetwebserver.service                                                                             loaded active     running         Duet Web Server

It seams to work when I start it manually:

root@blimy:~# /opt/dsf/bin/DuetPluginService 
Duet Plugin Service v3.5.3
Written by Christian Hammacher for Duet3D
Licensed under the terms of the GNU Public License Version 3

[info] DuetPluginService.Program: Settings loaded
[info] DuetPluginService.Program: Connection established
[info] DuetPluginService.Program: Plugin DuetPiManagementPlugin loaded
[info] Plugin DuetPiManagementPlugin: Process has been started (pid 1472)

It looks OK to when I do the same when I do it as the dsf user (after allowing the login).

There is nothing in the logs unfortunately:

root@blimy:~#  journalctl -u  duetpluginservice-root.service
-- No entries --
root@blimy:~#

Any idea what's wrong here?

Cheers, Chriss

[droftarts]

@Chriss One for @chrishamm to investigate.

Ian

[chrishamm]

@Chriss You can enable them again on boot time by running sudo systemctl enable duetpluginservice and sudo systemctl enable duetpluginservice-root. I don't know why they were disabled on your setup.

[Chriss]

@chrishamm Oh, they are not disabled as you see, they are "inactive". I enabled them manually (just in case) and rebooted a couple of times. It seems that they do nothing at all.

It is very strange to be honest, I see no reason why they shout not start even if I start them with a "systemctl start ....". I have never ever seen a daemon on a UN*X like system with never come back after you started it. (Well, at least not if it is not totally malfunction)
And I would expect at least any kind of message on stdout or in the system log, but there is simply nothing.
I did not thing to the image, I downloaded the latest version, dd it to the SD card, booted the pi and did a "apt update ; apt upgrade -y", that's it. I came across the issue when I tried to start the "DuetPi Management Plugin".

root@blimy:~/SD-Card/sys# ls -al /etc/systemd/system/multi-user.target.wants/duet*
lrwxrwxrwx 1 root root 50 Sep 19 17:17 /etc/systemd/system/multi-user.target.wants/duetpluginservice-root.service -> /lib/systemd/system/duetpluginservice-root.service
lrwxrwxrwx 1 root root 45 Oct 15 15:38 /etc/systemd/system/multi-user.target.wants/duetpluginservice.service -> /lib/systemd/system/duetpluginservice.service
lrwxrwxrwx 1 root root 41 Sep 19 17:17 /etc/systemd/system/multi-user.target.wants/duetwebserver.service -> /lib/systemd/system/duetwebserver.service
root@blimy:~/SD-Card/sys#

Edit: Changing the shell of the user dfs to bash is the only thing I have changed in the meantime. I needed to do that to su to the user to see how the bin behaves when I start it manually to see if there is any error report.

Cheers, Chriss

[Chriss]

Nobody with an idea?

[chrishamm]

@Chriss Both DPS units depend on DCS so they won't start unless that service is active. AFAIR, the install scripts don't start these services again if they were disabled/stopped before the installation commenced. I don't know why these units were dead on your setup, they've worked OK on mine for a very long time and the corresponding systemd files haven't changed recently.

[Chriss]

@chrishamm Strange, most strange.... Is there a am64 repo for that? I would like to play with that in a VM.

Am I right when I assume that we need to have the process running twice, one as uid 0 and one as the dsf? I will create two supervisord script to manage the processes till I found the reason for that behavior via the systemd.

I'm confused that I'm the only person reporting that, I used the most recent raspberry image from the duet homepage and I did not altered anything.

Needless to say that I want my init system back.

Cheers, Chriss

[chrishamm]

@Chriss said in duetpluginservice(-root) not starting....:

Is there a am64 repo for that? I would like to play with that in a VM.

No. You could build it from the sources for different architectures but since it requires an SPI link to work I guess that's rather pointless.

@Chriss said in duetpluginservice(-root) not starting....:

Am I right when I assume that we need to have the process running twice, one as uid 0 and one as the dsf?

Yes.

@Chriss said in duetpluginservice(-root) not starting....:

I'm confused that I'm the only person reporting that, I used the most recent raspberry image from the duet homepage and I did not altered anything.

If anything went wrong during start-up, the journal should tell you. No idea why they were empty on your machine, though. They should be enabled by default. What variant are you using, 32 or 64-bit, with or without GUI?

[Chriss]

@chrishamm said in duetpluginservice(-root) not starting....:

@Chriss said in duetpluginservice(-root) not starting....:

Is there a am64 repo for that? I would like to play with that in a VM.

No. You could build it from the sources for different architectures but since it requires an SPI link to work I guess that's rather pointless.

OK, so no VM than, I will grep a other PI than for testing that.

@Chriss said in duetpluginservice(-root) not starting....:

I'm confused that I'm the only person reporting that, I used the most recent raspberry image from the duet homepage and I did not altered anything.

If anything went wrong during start-up, the journal should tell you. No idea why they were empty on your machine, though. They should be enabled by default. What variant are you using, 32 or 64-bit, with or without GUI?

64 and without GUI.

Cheers, Chriss