适用于NVIDIA opengl应用程序的Docker xserver主机中没有X

分类：编程问答

如何解决适用于NVIDIA opengl应用程序的Docker xserver主机中没有X

我正在尝试创建一个镜像，该镜像使用OpenGL GPU无头应用程序的NVIDIA GPU运行X服务器。 （可用于创建纹理，在没有屏幕的情况下运行Unity3D等）。在这种情况下，主机不运行X服务器，我想在容器内完成所有操作。

我正在使用该Dockerfile作为映像：

FROM ubuntu:18.04
    
ENV DEBIAN_FRONTEND=noninteractive
    
RUN apt update && \
        apt install -y \
        libglvnd0 \
        libgl1 \
        libglx0 \
        libegl1 \
        libgles2 \
        xserver-xorg-video-nvidia-440    
    
COPY xorg.conf.nvidia-headless /etc/X11/xorg.conf

ENV NVIDIA_VISIBLE_DEVICES all
ENV NVIDIA_DRIVER_CAPABILITIES graphics
ENV DISPLAY :1
    
    ENTRYPOINT ["/bin/bash"]

对于xorg.config.nvidia-headless，我使用nvidia-xconfig创建了它

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0"
EndSection

Section "Files"
EndSection

Section "Module"
    Load           "dbe"
    Load           "extmod"
    Load           "type1"
    Load           "freetype"
    Load           "glx"
EndSection

Section "Monitor"
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "Unknown"
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "UseDisplayDevice" "None"
    SubSection     "Display"
        Virtual     1920 1080
        Depth       24
    EndSubSection
EndSection

我使用--privileged和--gpus运行docker，都使用nvidia-docker并共享设备--device --device = / dev / dri / card0。在Docker内部，我可以完美地运行nvidia-smi。 当我运行docker时，我使用以下命令启动X服务器：

Xorg -noreset +extension GLX +extension RANDR +extension RENDER -logfile ./xserver.log vt1 :1

但是显示错误：

(EE) 
Fatal server error:
(EE) no screens found(EE) 
(EE)

这是完整的日志：

X.Org X Server 1.19.6
Release Date: 2017-12-20
[  1296.109] X Protocol Version 11,Revision 0
[  1296.109] Build Operating System: Linux 4.4.0-168-generic x86_64 Ubuntu
[  1296.109] Current Operating System: Linux ubuntu 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9 23:41:39 UTC 2020 x86_64
[  1296.109] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.15.0-112-generic root=UUID=8f2dc01d-1666-4abd-9bd1-cfe0a20afdf1 ro splash quiet vt.handoff=1
[  1296.109] Build Date: 14 November 2019  06:20:00PM
[  1296.109] xorg-server 2:1.19.6-1ubuntu4.4 (For technical support please see http://www.ubuntu.com/support) 
[  1296.109] Current version of pixman: 0.34.0
[  1296.109]    Before reporting problems,check http://wiki.x.org
    to make sure that you have the latest version.
[  1296.109] Markers: (--) probed,(**) from config file,(==) default setting,(++) from command line,(!!) notice,(II) informational,(WW) warning,(EE) error,(NI) not implemented,(??) unknown.
[  1296.110] (++) Log file: "./xserver.log",Time: Wed Aug 19 08:38:46 2020
[  1296.110] (==) Using config file: "/etc/X11/xorg.conf"
[  1296.110] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[  1296.111] (==) ServerLayout "Layout0"
[  1296.111] (**) |-->Screen "Screen0" (0)
[  1296.111] (**) |   |-->Monitor "Monitor0"
[  1296.112] (**) |   |-->Device "Device0"
[  1296.112] (**) |-->Input Device "Keyboard0"
[  1296.112] (**) |-->Input Device "Mouse0"
[  1296.112] (==) Automatically adding devices
[  1296.112] (==) Automatically enabling devices
[  1296.112] (==) Automatically adding GPU devices
[  1296.112] (==) Automatically binding GPU devices
[  1296.112] (==) Max clients allowed: 256,resource mask: 0x1fffff
[  1296.114] (WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist.
[  1296.114]    Entry deleted from font path.
[  1296.114] (WW) The directory "/usr/share/fonts/X11/100dpi/" does not exist.
[  1296.114]    Entry deleted from font path.
[  1296.114] (WW) The directory "/usr/share/fonts/X11/75dpi/" does not exist.
[  1296.114]    Entry deleted from font path.
[  1296.114] (WW) The directory "/usr/share/fonts/X11/Type1" does not exist.
[  1296.114]    Entry deleted from font path.
[  1296.114] (WW) The directory "/usr/share/fonts/X11/100dpi" does not exist.
[  1296.114]    Entry deleted from font path.
[  1296.114] (WW) The directory "/usr/share/fonts/X11/75dpi" does not exist.
[  1296.114]    Entry deleted from font path.
[  1296.114] (==) FontPath set to:
    /usr/share/fonts/X11/misc,built-ins
[  1296.114] (==) ModulePath set to "/usr/lib/xorg/modules"
[  1296.114] (WW) Hotplugging is on,devices using drivers 'kbd','mouse' or 'vmmouse' will be disabled.
[  1296.114] (WW) Disabling Keyboard0
[  1296.114] (WW) Disabling Mouse0
[  1296.115] (II) Loader magic: 0x55dca9edc020
[  1296.115] (II) Module ABI versions:
[  1296.115]    X.Org ANSI C Emulation: 0.4
[  1296.115]    X.Org Video Driver: 23.0
[  1296.115]    X.Org XInput driver : 24.1
[  1296.115]    X.Org Server Extension : 10.0
[  1296.116] (EE) dbus-core: error connecting to system bus: org.freedesktop.DBus.Error.FileNotFound (Failed to connect to socket /var/run/dbus/system_bus_socket: No such file or directory)
[  1296.116] (++) using VT number 1

[  1296.116] (II) systemd-logind: logind integration requires -keeptty and -keeptty was not provided,disabling logind integration
[  1296.116] (II) xfree86: Adding drm device (/dev/dri/card0)
[  1296.119] (**) OutputClass "nvidia" ModulePath extended to "/usr/lib/x86_64-linux-gnu/nvidia/xorg,/usr/lib/xorg/modules"
[  1296.122] (--) PCI:*(0:1:0:0) 10de:100c:1043:84b7 rev 161,Mem @ 0xf9000000/16777216,0xd0000000/134217728,0xd8000000/33554432,I/O @ 0x0000e000/128,BIOS @ 0x????????/131072
[  1296.122] (II) LoadModule: "glx"
[  1296.123] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
[  1296.131] (EE) Failed to load /usr/lib/xorg/modules/extensions/libglx.so: /usr/lib/xorg/modules/extensions/libglx.so: undefined symbol: glxServer
[  1296.131] (II) UnloadModule: "glx"
[  1296.131] (II) Unloading glx
[  1296.131] (EE) Failed to load module "glx" (loader failed,7)
[  1296.131] (II) LoadModule: "nvidia"
[  1296.131] (II) Loading /usr/lib/x86_64-linux-gnu/nvidia/xorg/nvidia_drv.so
[  1296.138] (II) Module nvidia: vendor="NVIDIA Corporation"
[  1296.139]    compiled for 1.6.99.901,module version = 1.0.0
[  1296.139]    Module class: X.Org Video Driver
[  1296.140] (II) NVIDIA dlloader X Driver  440.100  Fri May 29 08:21:27 UTC 2020
[  1296.140] (II) NVIDIA Unified Driver for all Supported NVIDIA GPUs
[  1296.141] (II) Loading sub module "fb"
[  1296.141] (II) LoadModule: "fb"
[  1296.141] (II) Loading /usr/lib/xorg/modules/libfb.so
[  1296.143] (II) Module fb: vendor="X.Org Foundation"
[  1296.143]    compiled for 1.19.6,module version = 1.0.0
[  1296.143]    ABI class: X.Org ANSI C Emulation,version 0.4
[  1296.143] (II) Loading sub module "wfb"
[  1296.143] (II) LoadModule: "wfb"
[  1296.143] (II) Loading /usr/lib/xorg/modules/libwfb.so
[  1296.144] (II) Module wfb: vendor="X.Org Foundation"
[  1296.144]    compiled for 1.19.6,module version = 1.0.0
[  1296.144]    ABI class: X.Org ANSI C Emulation,version 0.4
[  1296.144] (II) Loading sub module "ramdac"
[  1296.144] (II) LoadModule: "ramdac"
[  1296.144] (II) Module "ramdac" already built-in
[  1296.145] (EE) NVIDIA: Failed to initialize the NVIDIA kernel module. Please see the
[  1296.145] (EE) NVIDIA:     system's kernel log for additional error messages and
[  1296.145] (EE) NVIDIA:     consult the NVIDIA README for details.
[  1296.145] (EE) NVIDIA: Failed to initialize the NVIDIA kernel module. Please see the
[  1296.145] (EE) NVIDIA:     system's kernel log for additional error messages and
[  1296.145] (EE) NVIDIA:     consult the NVIDIA README for details.
[  1296.145] (EE) NVIDIA: Failed to initialize the NVIDIA kernel module. Please see the
[  1296.145] (EE) NVIDIA:     system's kernel log for additional error messages and
[  1296.145] (EE) NVIDIA:     consult the NVIDIA README for details.
[  1296.145] (EE) No devices detected.
[  1296.145] (II) Applying OutputClass "nvidia" to /dev/dri/card0
[  1296.145]    loading driver: nvidia
[  1296.145] (==) Matched nvidia as autoconfigured driver 0
[  1296.145] (==) Matched nouveau as autoconfigured driver 1
[  1296.145] (==) Matched nouveau as autoconfigured driver 2
[  1296.145] (==) Matched modesetting as autoconfigured driver 3
[  1296.145] (==) Matched fbdev as autoconfigured driver 4
[  1296.145] (==) Matched vesa as autoconfigured driver 5
[  1296.145] (==) Assigned the driver to the xf86ConfigLayout
[  1296.145] (II) LoadModule: "nvidia"
[  1296.145] (II) Loading /usr/lib/x86_64-linux-gnu/nvidia/xorg/nvidia_drv.so
[  1296.145] (II) Module nvidia: vendor="NVIDIA Corporation"
[  1296.145]    compiled for 1.6.99.901,module version = 1.0.0
[  1296.145]    Module class: X.Org Video Driver
[  1296.145] (II) UnloadModule: "nvidia"
[  1296.145] (II) Unloading nvidia
[  1296.145] (II) Failed to load module "nvidia" (already loaded,21980)
[  1296.145] (II) LoadModule: "nouveau"
[  1296.146] (WW) Warning,couldn't open module nouveau
[  1296.146] (II) UnloadModule: "nouveau"
[  1296.146] (II) Unloading nouveau
[  1296.146] (EE) Failed to load module "nouveau" (module does not exist,0)
[  1296.146] (II) LoadModule: "modesetting"
[  1296.146] (II) Loading /usr/lib/xorg/modules/drivers/modesetting_drv.so
[  1296.147] (II) Module modesetting: vendor="X.Org Foundation"
[  1296.147]    compiled for 1.19.6,module version = 1.19.6
[  1296.147]    Module class: X.Org Video Driver
[  1296.147]    ABI class: X.Org Video Driver,version 23.0
[  1296.147] (II) LoadModule: "fbdev"
[  1296.147] (WW) Warning,couldn't open module fbdev
[  1296.147] (II) UnloadModule: "fbdev"
[  1296.147] (II) Unloading fbdev
[  1296.147] (EE) Failed to load module "fbdev" (module does not exist,0)
[  1296.147] (II) LoadModule: "vesa"
[  1296.147] (WW) Warning,couldn't open module vesa
[  1296.147] (II) UnloadModule: "vesa"
[  1296.147] (II) Unloading vesa
[  1296.147] (EE) Failed to load module "vesa" (module does not exist,0)
[  1296.147] (II) NVIDIA dlloader X Driver  440.100  Fri May 29 08:21:27 UTC 2020
[  1296.147] (II) NVIDIA Unified Driver for all Supported NVIDIA GPUs
[  1296.147] (II) modesetting: Driver for Modesetting Kernel Drivers: kms
[  1296.147] (WW) xf86OpenConsole: setpgid failed: Operation not permitted
[  1296.147] (WW) xf86OpenConsole: setsid failed: Operation not permitted
[  1296.147] (EE) NVIDIA: Failed to initialize the NVIDIA kernel module. Please see the
[  1296.147] (EE) NVIDIA:     system's kernel log for additional error messages and
[  1296.147] (EE) NVIDIA:     consult the NVIDIA README for details.
[  1296.147] (EE) NVIDIA: Failed to initialize the NVIDIA kernel module. Please see the
[  1296.147] (EE) NVIDIA:     system's kernel log for additional error messages and
[  1296.147] (EE) NVIDIA:     consult the NVIDIA README for details.
[  1296.147] (WW) Falling back to old probe method for modesetting
[  1296.147] (EE) Screen 0 deleted because of no matching config section.
[  1296.147] (II) UnloadModule: "modesetting"
[  1296.147] (EE) Device(s) detected,but none match those in the config file.
[  1296.147] (EE) 
Fatal server error:
[  1296.147] (EE) no screens found(EE) 
[  1296.147] (EE) 
Please consult the The X.Org Foundation support 
     at http://wiki.x.org
 for help. 
[  1296.147] (EE) Please also check the log file at "./xserver.log" for additional information.
[  1296.147] (EE) 
[  1296.149] (EE) Server terminated with error (1). Closing log file.

有人可以帮助我吗？这将在具有NVIDIA GPU的无头机器上运行。

解决方法

第一件事：如果您想要无头OpenGL 请不要使用X服务器！

距离X服务器需要与GPU对话已经有好几年了。如果没有，则可以进行无头渲染。 Nvidia上有一篇不错的文章介绍了如何做到这一点：https://developer.nvidia.com/blog/egl-eye-opengl-visualization-without-x-server/

要点是，您可以使用EGL来建立上下文，并通过调用eglMakeCurrent(eglDpy,EGL_NO_SURFACE,eglCtx);使上下文成为当前表面。

您仍然需要Xorg的Nvidia驱动程序，因为它还包含所有屏幕外的内容，但有一个重要警告：Nvidia用户界面驱动程序必须匹配主机系统nvidia内核模块版本。如果将驱动程序包装在Docker容器中，则实际上是将该Docker映像绑定到主机系统上的特定内核模块版本。情况不理想。相反，您应该配置docker映像以绑定主机系统中的驱动程序和OpenGL实现库。不幸的是，找不到这些库和驱动程序的通用位置，这意味着要花费更多的精力才能可靠地将它们全部拉入。但是绝望的是，Nvidia已经为您完成了工作：

https://gitlab.com/nvidia/container-images/opengl

此外，为了可靠地设置屏幕外上下文，还有助于取消设置DISPLAY变量：由于Nvidia只是将所有Vulkan和EGL内容构建在Xorg驱动程序之上，因此有一些代码路径可以评估该变量，并且取消设置有助于在正确的方向上微调所有代码路径。因此，在您的程序内部，在设置OpenGL上下文之前，请执行setenv("DISPLAY",NULL,0)。

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