projects:command_and_control

Command & Control

Name Command & Control
Description A wall of displays showing off the most essential data needed by NOC & C3L in general.
Status Half-running (currently being updated)
Contact virii & orimpe
Participants: metalgamer xbr

Hardware

  • 4x 8GB eMMC
  • 4x 16x2 LCD IO kits
  • 4x GW2270 1080p HDMI monitors
  • 4x 1M patch cables
  • 1x 5 port network switch
  • 4x 1M HDMI cables
  • 4x power supplies

Software

  • Fullscreen web browser with no controls (Kiosk-style)
    • MCR-Alpha (Top-Left): Turris
    • MCR-Gamma (Bottom-Left): MQTT
    • MCR-Delta (Bottom-Right): ODroid
    • MCR-Beta (Top-Right): SpaceAPI
  • autom8 account
    • This user is used internally to shut down the individual SBCs (Single-board computer) when the space is closing.
    • It needs to have access to at least shutdown without entering a password:
      • The following line is in the sudoers file:
        autom8 ALL=NOPASSWD: /sbin/halt, /sbin/reboot, /sbin/poweroff, /sbin/shutdown now
    • The autom8 user connects via SSH, so the following key is authorized:
      • ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDZOMpHb1kVe+4dhj5QTh6wB69RSbkqxA6CA9Olwq+SSIe/CObbOafaEGyTUmZ1HDIgyTGzH2PgYDz17gxcld11GBKrW4lViIvkblnbMyzjjzxqqJY4CwGjpEBtnwnw3q4GZqQO2Jk7ZK1aJ3s5nJylDMmaLong5BUqDwohBNykuC2OMt+Xg/o0px3uVvz//THjIy4SSRGKwDnoh8d8CIOvi3RA1g6wov8q/Xcm4w6eZhOTgInovO9sKukng3LgTnnY5FXHuCRBZuvi9sy6Bye8If3rG4uPMQ3fLnd/Y7ekDev7oZLViFm7Ldmgmbpu99ezdus+OOdo0YeHegccxAux autom8@dash
  • 16x2 LCD text, currently dependent on the host:
    • MCR-Alpha:
       Hello! ODROID! 
       - MCR-Alpha - 
    • MCR-Gamma:
       Hello! ODROID! 
       - MCR-Gamma - 
    • MCR-Delta:
       Hello! ODROID! 
       - MCR-Delta - 
    • MCR-Beta:
       Hello! ODROID! 
       - MCR-Beta -   
Implementation

The ODROIDs are now using Armbian's Focal (Fossa) XFCE release with an older version (early 2020 release) of the U-Boot bootloader flashed with the ArchLinuxARM sd_fusing.sh tool.

This older bootloader version is flashed instead of using the one that is on the Armbian image, because at the time of installation, the version distributed on Armbian's ISO images is a more recent, broken version. (doesn't boot without a serial adapter connected, Ethernet doesn't work.

Then:

  • an odroid user and autom8 user are created
  • the autom8 user gets the ssh key added
  • the sudoers shutdown commands get added to the '/etc/sudoders' file
  • a file to autostart XFCE, with the odroid user is added (lightdm)
  • Add the Barrier SSL key to the Barrier's TrustedServers.txt
  • add files to the odroid user's autostart (XFCE) directory:
    • Start Firefox Kiosk mode with the corresponding URL
    • Kill the xfce4 panel/menu bar because otherwise it shows up over the firefox fullscreen until the window is clicked on
    • Start Barrier in client mode that automatically connects to the server (config) with SSL, or in server mode with SSL (config)
  • projects/command_and_control.txt
  • Last modified: 2021/04/30 09:34
  • by xbr