Pms_agent.service not found

Sixfab Power HAT & Software Power Software
1

Hello!

Tad new here, I’m trialling the UPS hat at the moment and I seem to be running into a few teething issues.

Upon installing the software via curl, I noticed that the software had noticed the lack of ‘pi’ user (I develop industrial cryogenic vessel interfaces, so security vulnerabilities like generic usernames are a BIG no no). It seems that because of this, the software is not transmitting information to the cloud.

Looking into brought me to this post: connected but no data
(TL;DR) solution suggested was:

# create user power, add power to the groups: sudo, i2c, video
sudo adduser power
sudo adduser power sudo
sudo adduser power i2c
sudo adduser power video

# edit /etc/sudoers and at the end of the file insert a line with the following content: "power ALL=(ALL) NOPASSWD:ALL".
echo "power ALL=(ALL) NOPASSWD:ALL"|sudo EDITOR='tee -a' visudo

# stop pms_agent, edit user in /etc/systemd/system/pms_agent.service and start pms_agent
sudo systemctl stop pms_agent
sudo sed -i 's/^\(User=\).*/\1power/' /etc/systemd/system/pms_agent.service
sudo systemctl start pms_agent

Unfortunately for reasons that are beyond my understanding, the section RE restarting the pms_agent fails:

uname@hostname:/home/uname# sudo systemctl stop pms_agent
Failed to stop pms_agent.service: Unit pms_agent.service not loaded.
uname@hostname:/home/uname# sudo sed -i 's/^\(User=\).*/\1power/' /etc/systemd/system/pms_agent.service
sed: can't read /etc/systemd/system/pms_agent.service: No such file or directory
uname@hostname:/home/uname# sudo systemctl start pms_agent
Failed to start pms_agent.service: Unit pms_agent.service not found.

I don’t suppose anyone could weigh in with any suggestions to what may be going wrong here?

Thanks in advance,
Daniel

2

Hello Daniel,

Thank you for your valuable feedback about the generic username.

The pms_agent.service has been replaced by power_agent.service.
Please try with power_agent.service

3

Hi Saeed,

Thank you for your response, I have adjusted the commands accordingly:

# stop pms_agent, edit user in /etc/systemd/system/pms_agent.service and start pms_agent
sudo systemctl stop power_agent
sudo sed -i 's/^\(User=\).*/\1power/' /etc/systemd/system/power_agent.service
sudo systemctl start power_agent

The sed command didn’t work, so I used nano to change the ‘User’ variable in etc/systemd/system/power_agent.service to ‘power’ (from ‘pi’).

After restarting the service the Power website shows Network status: Connected, but none of the value have updated. Checking journalctl -u power_agent.service lists a lot of:

Feb 17 15:40:11 polarisSBC010 sudo[1361]:    power : TTY=unknown ; PWD=/opt/sixfab/pms/agent ; USER=root ; COMMAND=/usr/bin/cat /opt/sixfab/pms/api/setup.py
Feb 17 15:40:11 polarisSBC010 sudo[1361]: pam_unix(sudo:session): session opened for user root by (uid=0)
Feb 17 15:40:11 polarisSBC010 sudo[1361]: pam_unix(sudo:session): session closed for user root

Any idea what’s going on here?

Many thanks,
Daniel

4

Hello Daniel,

Please perform similar steps for the power_request.service too.

5

Wonderful, thank you!
In the end, this becomes the solution:

# create user power, add power to the groups: sudo, i2c, video
sudo adduser power
sudo adduser power sudo
sudo adduser power i2c
sudo adduser power video

# edit /etc/sudoers and at the end of the file insert a line with the following content: "power ALL=(ALL) NOPASSWD:ALL".
echo "power ALL=(ALL) NOPASSWD:ALL"|sudo EDITOR='tee -a' visudo

sudo systemctl stop power_agent
sudo systemctl stop power_request
sudo sed -i 's/^\(User=\).*/\1power/' /etc/systemd/system/power_agent.service
sudo sed -i 's/^\(User=\).*/\1power/' /etc/systemd/system/power_request.service
sudo systemctl start power_agent
sudo systemctl start power_request

Many thanks,
Daniel

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