Merge pull request #132 from Snawoot/docker

Docker support

Dockerfile

@@ -0,0 +1,10 @@
+FROM nvidia/cuda:latest
+
+ENV NVIDIA_VISIBLE_DEVICES all
+ENV NVIDIA_DRIVER_CAPABILITIES compute,video,utility
+
+RUN mkdir -p /usr/local/bin /patched-lib
+COPY patch.sh docker-entrypoint.sh /usr/local/bin/
+RUN chmod +x /usr/local/bin/patch.sh /usr/local/bin/docker-entrypoint.sh
+
+ENTRYPOINT ["/usr/local/bin/docker-entrypoint.sh"]

README.md

@@ -100,6 +100,17 @@ If something got broken you may restore patched driver from backup:
 bash ./patch.sh -r
 ```
 
+## Docker support
+
+It is possible to use this patch with nvidia-docker containers, even if host machine hasn't patched drivers. See `Dockerfile` for example.
+
+Essentially all you need to do during build is:
+
+* `COPY` the `patch.sh` and `docker-entrypoint.sh` files into your container.
+* Make sure `docker-entrypoint.sh` is invoked on container start.
+
+`docker-entrypoint.sh` script does on-the-fly patching by means of manipulating dynamic linker to workaround read-only mount of Nvidia runtime. Finally it passes original docker command to shell, like if entrypoint was not restricted by `ENTRYPOINT` directive. So `docker run --runtime=nvidia -it mycontainer echo 123` will print `123`. Also it can be just invoked from your entrypoint script, if you have any.
+
 ## See also
 
 * Plex Media Server: enable HW **decoding**: 

docker-entrypoint.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+
+echo "/patched-lib" > /etc/ld.so.conf.d/000-patched-lib.conf && \
+mkdir -p "/patched-lib" && \
+PATCH_OUTPUT_DIR=/patched-lib /usr/local/bin/patch.sh && \
+cd /patched-lib && \
+for f in * ; do
+    suffix="${f##*.so}"
+    name="$(basename "$f" "$suffix")"
+    [ -h "$name" ] || ln -sf "$f" "$name"
+    [ -h "$name" ] || ln -sf "$f" "$name.1"
+done && \
+ldconfig
+[ "$OLDPWD" ] && cd -
+exec "$@"

patch.sh

@@ -95,7 +95,7 @@ declare -A object_list=(
     ["430.34"]='libnvcuvid.so'
 )
 
-NVIDIA_SMI="$(which nvidia-smi)"
+NVIDIA_SMI="$(command -v nvidia-smi)"
 
 if ! driver_version=$("$NVIDIA_SMI" --query-gpu=driver_version --format=csv,noheader,nounits | head -n 1) ; then
     echo 'Something went wrong. Check nvidia driver'
@@ -151,8 +151,8 @@ else
     fi
     sha1sum "$backup_path/$object.$driver_version"
     sed "$patch" "$backup_path/$object.$driver_version" > \
-      "$driver_dir/$object.$driver_version"
+      "${PATCH_OUTPUT_DIR-$driver_dir}/$object.$driver_version"
-    sha1sum "$driver_dir/$object.$driver_version"
+    sha1sum "${PATCH_OUTPUT_DIR-$driver_dir}/$object.$driver_version"
     ldconfig
     echo "Patched!"
 fi