Problem getting machineid on LXC/LXD container

When you install Trisul packages like the probe or hub on a LXC/LXD linux container you might face an error where Trisul is unable to get the machineID of the container.

The error could be something like the following ; when you try to get the machineID from the hub or probe node from the admin panel.

Essentially you need to set the container permissions to allow access to the /dev/mem device from the host which is used as part of dmidecode. Do the following steps.

lxc stop <container_name>
lxc config set <container_name> security.privileged true
lxc config device add <container_name> devmem unix-char source=/dev/mem
lxc restart <container_name>

To test if it works do

lxc exec <container_name> dmidecode

If that does not work add the following commands and retry

lxc config set <container_name> raw.lxc 'lxc.cap.drop='
lxc config set <container_name> raw.lxc 'lxc.cap.keep='