====== 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.

{{:tips:trisul_network_analytics_14-07-2021_18-36-20.png?800|}}


===== Fix this error to allow LXC nodes to get the machineID =====

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.


<code>
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>
</code>

To test if it works do
<code>
lxc exec <container_name> dmidecode
</code>


If that does not work add the following commands and retry

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