Incus container - can't add (or start) with device/port mapping

Incus
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1

I installed incus on a debian 12 virtual machine. After that I lauched a new container

incus launch images:debian/12 mydebian

I can enter the container and run commands and all seems to work normally.

incus exec mydebian /bin/bash
– ran some apt-get commands to setup apache2/php –
– wget in the container works to interact with apache2/php –
** exited back to the host

The apache2 service in the container is setup to listen/serve on port 5000. I tried to map the port between the host and container with the below command

incus config device add mydebian port-8012 proxy listen=tcp:0.0.0.0:8012 connect=tcp:127.0.0.1:5000

this add command returns the following error:

Error: Failed to start device “port-8012”: Failed to start device “port-8012”: Please look in /var/log/incus/mydebian/proxy.port-8012.log

when I cat /var/log/incus/mydebian/proxy.port-8012.log it is empty

If I stop the container, it will add the device but then the container won’t start

incus stop mydebian
incus config device add mydebian port-8012 proxy listen=tcp:0.0.0.0:8012 connect=tcp:127.0.0.1:5000

Command Response:

Device port-8012 added to mydebian

then when I try to start the container again. It will not start.

incus start mydebian

Command Response:

Error: Failed to start device “port-8012”: Please look in /var/log/incus/mydebian/proxy.port-8012.log
Try incus info --show-log mydebian for more info

again, checking /var/log/incus/mydebian/proxy.port-8012.log the file is empty

running the command:

incus info --show-log mydebian

Command Response:

Name: mydebian
Status: STOPPED
Type: container
Architecture: x86_64
Created: 2024/06/21 09:33 UTC
Last Used: 2024/08/08 14:54 UTC

Log:

I am not sure what to check or do from this point since it seems the container works without the port mapping. The logs are empty/blank after adding the device/port.

What should I do next to get connectivity between the host/container through a mapped port?

2

The first thing I’d check is if port 8012 is used on the host.
netstat -lnp | grep 8012

If that’s not the issue, then check dmesg for any DENIED entries.

3

Thanks! I went to install the Incus-UI-Canonical package just a couple minutes ago and apt threw an error about / being out of disk space. I resized the partition and the container is now working :slight_smile: