core-daemon - failed to start

[jakubkameleon]

Could I ask for help? I have installed core_6.1.0_amd64.deb on my Debian 10, Gui works fine but I have problem with start daemon.

`root@ThinkPad:~# service core-daemon status
● core-daemon.service - Common Open Research Emulator Service
Loaded: loaded (/lib/systemd/system/core-daemon.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Fri 2020-02-28 13:38:10 CET; 1s ago
Process: 6822 ExecStart=/usr/local/bin/core-daemon (code=exited, status=1/FAILURE)
Main PID: 6822 (code=exited, status=1/FAILURE)

Feb 28 13:38:10 ThinkPad systemd[1]: Started Common Open Research Emulator Service.
Feb 28 13:38:10 ThinkPad core-daemon[6822]: Traceback (most recent call last):
Feb 28 13:38:10 ThinkPad core-daemon[6822]: File "/usr/local/bin/core-daemon", line 16, in
Feb 28 13:38:10 ThinkPad core-daemon[6822]: from core import constants
Feb 28 13:38:10 ThinkPad core-daemon[6822]: ModuleNotFoundError: No module named 'core'
Feb 28 13:38:10 ThinkPad systemd[1]: core-daemon.service: Main process exited, code=exited, status=1/FAILURE
Feb 28 13:38:10 ThinkPad systemd[1]: core-daemon.service: Failed with result 'exit-code'.
`

[siliconja]

According to dpkg -c core_6.1.0_amd64.deb we have Python 3 libraries installed to /usr/local/lib/python3.6/dist-packages/core/.

On Debian 10 if you enter python3, import sys, print(sys.path) you get /usr/local/lib/python3.7/dist-packages etc.

So a quick fix for you would be (noting that /home/user1/.local/lib/python3.7/site-packages is in the PYTHONPATH) going to ~/.local/lib/python3.7 and move away site-packages and symlink it to the /usr/local/lib/python3.6/dist-packages dir.

Another option would be to export a new PYTHONPATH including that python3.6 path (even though you have python3.7) and run core-daemon from the terminal.

[jakubkameleon]

Hi thanks for your repaly, I move site-packages (directory) and created symlink at the same name /home/pretender/.local/lib/python3.7/site-packages to /usr/local/lib/python3.6/dist-packages but nothing happend :(. Should I change something else to force debian use python3.6?

About second option how to export new PYTHONPATH and run core-daemon with this path?

One more thing on Ubuntu 18.04.02 (virtualbox) I have the same problem :/, but there is only python3.6

[siliconja]

OK, to get this core_6.1.0_amd64.deb working under Debian 10, I had to do the following steps:

sudo -s
export PYTHONPATH="/usr/local/lib/python3.6/dist-packages`python3 -c 'import sys;print(":".join(sys.path))'`"
apt install python3-netaddr
pip3 install fabric
core-daemon

At this point I could run core-gui from a non-root terminal OK.

Now to get coretk-gui working... I tried sudo apt install python3-pil.imagetk, adjusting the PYTHONPATH as above, and then running coretk-gui. Under Edit > Preferences you are going to want to change your terminal. I tried gnome-terminal but that wasn't working for some reason (but cut-n-paste command from error message was working.)

[jakubkameleon]

Thank you for your time, I have followed your steps on my Debian 10 and Ubuntu 18.04(virtualbox) and the result is the same, still can't run core-daemon :(. I wonder if I forget something or what???

root@ThinkPad:/home/pretender# core-daemon Traceback (most recent call last): File "/usr/local/bin/core-daemon", line 17, in <module> from core.api.grpc.server import CoreGrpcServer File "/usr/local/lib/python3.6/dist-packages/core/api/grpc/server.py", line 13, in <module> from core.api.grpc import ( File "/usr/local/lib/python3.6/dist-packages/core/api/grpc/grpcutils.py", line 13, in <module> from core.emulator.session import Session File "/usr/local/lib/python3.6/dist-packages/core/emulator/session.py", line 18, in <module> from core.emane.emanemanager import EmaneManager File "/usr/local/lib/python3.6/dist-packages/core/emane/emanemanager.py", line 14, in <module> from core.emane.bypass import EmaneBypassModel File "/usr/local/lib/python3.6/dist-packages/core/emane/bypass.py", line 6, in <module> from core.emane import emanemodel File "/usr/local/lib/python3.6/dist-packages/core/emane/emanemodel.py", line 14, in <module> from core.xml import emanexml File "/usr/local/lib/python3.6/dist-packages/core/xml/emanexml.py", line 6, in <module> from lxml import etree ModuleNotFoundError: No module named 'lxml'

[siliconja]

OK so now we can see it is finding the CORE Python 3 modules but missing some dependencies. You can install these dependencies by downloading this requirements.txt file: https://github.com/coreemu/core/blob/master/daemon/requirements.txt

sudo pip3 install -r requirements.txt

(That is probably why my Debian 10 worked and yours did not, because I had previously issued the pip3 commands for building from source.)

[jakubkameleon]

Great now it works :) Thank you!!!

[siliconja]

Even though this is closed, we should document concisely the steps needed to install the 6.1.0 release on Debian 10.x