For Reasons™ I run Plex in a Docker container in LXC on Proxmox. Here's some configuration notes on making it work.
- It needs to be a privileged container
- Needs to have nesting enabled
Once the container has been created, you need to manually add the following options to the container's configuration file (/etc/pve/lxc/<id>.conf):
lxc.cgroup2.devices.allow: c 226:0 rwm
lxc.cgroup2.devices.allow: c 226:128 rwm
lxc.cgroup2.devices.allow: c 29:0 rwm
lxc.mount.entry: /dev/dri dev/dri none bind,optional,create=dir
lxc.mount.entry: /dev/fb0 dev/fb0 none bind,optional,create=file
The full file should look like:
arch: amd64
cores: 4
features: nesting=1
hostname: plex
memory: 4096
net0: name=eth0,bridge=vmbr0,firewall=1,hwaddr=62:AC:94:D0:65:50,ip=dhcp,type=veth
ostype: debian
rootfs: local-lvm:vm-100-disk-0,size=8G
swap: 512
lxc.cgroup2.devices.allow: c 226:0 rwm
lxc.cgroup2.devices.allow: c 226:128 rwm
lxc.cgroup2.devices.allow: c 29:0 rwm
lxc.mount.entry: /dev/dri dev/dri none bind,optional,create=dir
lxc.mount.entry: /dev/fb0 dev/fb0 none bind,optional,create=file
Start the container and then verify you can see the GPU:
root@plex:~# apt install -y vainfo pciutils
[..]
root@plex:~# vainfo
error: can't connect to X server!
libva info: VA-API version 1.10.0
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/iHD_drv_video.so
libva info: Found init function __vaDriverInit_1_10
libva info: va_openDriver() returns 0
vainfo: VA-API version: 1.10 (libva 2.10.0)
vainfo: Driver version: Intel iHD driver for Intel(R) Gen Graphics - 21.1.1 ()
vainfo: Supported profile and entrypoints
VAProfileMPEG2Simple : VAEntrypointVLD
VAProfileMPEG2Main : VAEntrypointVLD
VAProfileH264Main : VAEntrypointVLD
VAProfileH264Main : VAEntrypointEncSliceLP
VAProfileH264High : VAEntrypointVLD
VAProfileH264High : VAEntrypointEncSliceLP
VAProfileJPEGBaseline : VAEntrypointVLD
VAProfileJPEGBaseline : VAEntrypointEncPicture
VAProfileH264ConstrainedBaseline: VAEntrypointVLD
VAProfileH264ConstrainedBaseline: VAEntrypointEncSliceLP
VAProfileVP8Version0_3 : VAEntrypointVLD
VAProfileHEVCMain : VAEntrypointVLD
VAProfileHEVCMain10 : VAEntrypointVLD
VAProfileVP9Profile0 : VAEntrypointVLD
VAProfileVP9Profile2 : VAEntrypointVLD
root@plex:~# lspci -v -s $(lspci | grep VGA | cut -d" " -f 1)
00:02.0 VGA compatible controller: Intel Corporation Device 9bca (rev 04) (prog-if 00 [VGA controller])
DeviceName: GPU
Subsystem: Intel Corporation Device 2081
Flags: bus master, fast devsel, latency 0, IRQ 173, IOMMU group 1
Memory at 6022000000 (64-bit, non-prefetchable) [size=16M]
Memory at 4000000000 (64-bit, prefetchable) [size=256M]
I/O ports at 3000 [size=64]
Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
Capabilities: [40] Vendor Specific Information: Len=0c <?>
Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
Capabilities: [ac] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [d0] Power Management version 2
Capabilities: [100] Process Address Space ID (PASID)
Capabilities: [200] Address Translation Service (ATS)
Capabilities: [300] Page Request Interface (PRI)
Kernel driver in use: i915
Now we can pass through that device to Plex in Docker.
If you use the linuxserver Plex image then this is very simple, you just need to pass the /dev/dri device through as mentioned in the documentation:
# docker run --device=/dev/dri:/dev/dri \
--net=host -v $(pwd)/.plex:/config -v /syn/video:/video \
--name plex -d lscr.io/linuxserver/plex:latest