Afanasy on Ubuntu 20.04

[romanvolodin]

I've found out that render user group exists in Ubuntu 20.04 by default. So Afanasy can't create user render on installation.
Is there a way to fix this situation?
May be some workaround for Afanasy installation or may be I just can delete this user group? (No idea what this group is for.)
Any info would be helpful.

[timurhai]

Hi
Try to type this command:

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id render

What is the output?

[romanvolodin]

On fresh Ubuntu 20.04 installation (I'm using Virtualbox):

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$ id render
id: ‘render’: no such user
$ grep render /etc/group
render:x:109:

I've run the following command:

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$ sudo delgroup --system --only-if-empty render
Removing group `render' ...
Done.

Quote from delgroup man:

--system
Only delete if user/group is a system user/group. This avoids
accidentally deleting non-system users/groups. Additionally, if
the user does not exist, no error value is returned. This option
is mainly for use in Debian package maintainer scripts.

--only-if-empty
Only remove if no members are left.

And then Afanasy was successfully installed.

After Afanasy install:

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$ id render
uid=1001(render) gid=1001(render) groups=1001(render)
$ grep render /etc/group
render:x:1001:

[timurhai]

Just installed a fresh 20.04 on a virtual box too.
Hm, new group "render" appeared in 20.04 just after installation.
And i checked that there are no users in it.
So i do not know why it is needed. Most probably that it is not.

It is not breaks Afanasy installation, but it can't create a "render" user during installation.
So systemd scripts can launch afserver and afrender under render user that does not exist.

After installation, i just created "render" user by

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sudo useradd render -g render -m

to put it into existing group.
And after reboot, afserver and afrender was started by systemd.

I think i should check "render" group in the installation scripts, and use existing if it exists.

[timurhai]

This fixes the issue: (i checked on 20.04)
https://github.com/CGRU/cgru/commit/3bb ... d325800c57

[lalamax3d]

hi,
new user, trying to setup and feel, stuck on same point.
render user exists already ( may be from previous attempt ) userGroups shows its disabled

id render command in terminal shows

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user@dell:~$ id render
uid=1001(render) gid=109(render) groups=109(render),29(audio),46(plugdev),1000(user),132(sambashare)

afanasy menu appears green ( seems working )
from blender, i can open web gui and it seems working as well
job sumitted successfully, but machine is unable to render ( Avoiding Host Error )
Any ideas for fix (psudo steps) will help to sort will be helpful..
double clicking job >> double clicking task showing following (TAB WISE)
Executable TAB

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{
  "name": "frame 1-8",
  "service": "blender",
  "capacity": 1000,
  "time_start": 1615138708,
  "job_id": 2,
  "block_num": 0,
  "task_num": 0,
  "command_block": "blender -b \"/home/user/Downloads/temp_blends/scene.20210307220534.blend\" -y -E BLENDER_EEVEE -s @#@ -e @#@ -j 1 -a",
  "command_task": "",
  "frame_start": 1,
  "frame_finish": 8,
  "frames_inc": 1,
  "frames_num": 8,
  "parser": "blender",
  "working_directory": "/home/user"
}

OUTPUT TAB

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HOSTNAME=dell
Home directory not accessible: Permission denied
Home directory not accessible: Permission denied
ALSA lib pcm_dmix.c:1089:(snd_pcm_dmix_open) unable to open slave
Blender 2.92.0 (hash 02948a2cab44 built 2021-02-25 09:31:37)
Read blend: /home/user/Downloads/temp_blends/scene.20210307220534.blend
Unable to open a display
/opt/cgru/software_setup/bin/blender: line 5:  1771 Aborted                 (core dumped) $APP_EXE "$@"

LOG TAB

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Sun 07 Mar 22:26.10 : SESSION #1: Starting on "dell"
Sun 07 Mar 22:26.12 : Finished error.
Sun 07 Mar 22:26.12 : Automatically retrying error task1 of 3.
Sun 07 Mar 22:26.12 : SESSION #2: Starting on "dell"
Sun 07 Mar 22:26.14 : Finished error.
Sun 07 Mar 22:26.14 : Automatically retrying error task2 of 3.

[timurhai]

Hi!

Try to run task command manually.
Copy&paste it in a terminal and run.

Next, try to run it from afrender environment, like service under render user.
As some scene setup can use display.
Shut down X server (you can simple press CTRL+ALT+F1 (or F2, F3, .. F6) to go to the text mode.
Switch to render user and run a command.

[lalamax3d]

Hi Timurhai, (sir)
thanks for guidance. i am afraid, i didn't understand steps fully.

1- how exactly run the task manually? or from afrender environment ?
in afanasy console, i can check cmds afserver --help or afrender --help but none of these are showing me how to list or run a task that is in queue.??

2- from web-gui, double click task, i can see precisely task i wanna run (raw object) is

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{
  "name": "frame 1-8",
  "service": "blender",
  "capacity": 1000,
  "time_start": 1615314507,
  "job_id": 2,
  "block_num": 0,
  "task_num": 0,
  "command_block": "blender -b \"/home/user/Downloads/temp_blends/scene.20210309223503.blend\" -y -E BLENDER_EEVEE -s @#@ -e @#@ -j 1 -a",
  "command_task": "",
  "frame_start": 1,
  "frame_finish": 8,
  "frames_inc": 1,
  "frames_num": 8,
  "parser": "blender",
  "working_directory": "/home/user"
}

Q, how to tell afserver to render this task via user named 'render' .? thanks in advance, regards,haseeb

[timurhai]

Hi!
I was asking to run task manually w/o afrender.
Just paste and run task command in terminal.

[timurhai]

Your command is:

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"command_block": "blender -b \"/home/user/Downloads/temp_blends/scene.20210309223503.blend\" -y -E BLENDER_EEVEE -s @#@ -e @#@ -j 1 -a"

Afrender will fill @#@ patterns with frames, for example to render the first frame run:

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blender -b "/home/user/Downloads/temp_blends/scene.20210309223503.blend" -y -E BLENDER_EEVEE -s 1 -e 1 -j 1 -a