**Warning: This project is an alpha release, it is not intended to be used in production systems.**
**Warning: This project is based on an alpha release (libnvidia-container), it is not intended to be used in production systems.**
A modified version of [runc](https://github.com/opencontainers/runc) adding a custom [pre-start hook](https://github.com/opencontainers/runtime-spec/blob/master/config.md#prestart) to all containers.
A modified version of [runc](https://github.com/opencontainers/runc) adding a custom [pre-start hook](https://github.com/opencontainers/runtime-spec/blob/master/config.md#prestart) to all containers.
If environment variable `NVIDIA_VISIBLE_DEVICES` is set in the OCI spec, the hook will configure GPU access for the container by leveraging `nvidia-container-cli` from project [libnvidia-container](https://github.com/NVIDIA/libnvidia-container).
If environment variable `NVIDIA_VISIBLE_DEVICES` is set in the OCI spec, the hook will configure GPU access for the container by leveraging `nvidia-container-cli` from project [libnvidia-container](https://github.com/NVIDIA/libnvidia-container).
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@@ -52,16 +52,32 @@ This option controls which driver libraries/binaries will be mounted inside the
*`utility`: required for using `nvidia-smi` and NVML,
*`utility`: required for using `nvidia-smi` and NVML,
*`video`: required for using the Video Codec SDK.
*`video`: required for using the Video Codec SDK.
### `NVIDIA_CUDA_VERSION`
### `NVIDIA_REQUIRE_*`
The version of the CUDA toolkit used by the container.
A logical expression to define constraints on the configurations supported by the container.
#### Supported constraints
*`cuda`: constraint on the CUDA driver version,
*`driver`: constraint on the driver version,
*`arch`: constraint on the compute architectures of the selected GPUs.
#### Expressions
Multiple constraints can be expressed in a single environment variable: space-separated constraints are ORed, comma-separated constraints are ANDed.
Multiple environment variables of the form `NVIDIA_REQUIRE_*` are ANDed together.
### `NVIDIA_DISABLE_REQUIRE`
Single switch to disable all the constraints of the form `NVIDIA_REQUIRE_*`.
### `NVIDIA_REQUIRE_CUDA`
The version of the CUDA toolkit used by the container. It is an instance of the generic `NVIDIA_REQUIRE_*` case and it is set by official CUDA images.
If the version of the NVIDIA driver is insufficient to run this version of CUDA, the container will not be started.
If the version of the NVIDIA driver is insufficient to run this version of CUDA, the container will not be started.
#### Possible values
#### Possible values
*`7.5`, `8.0`, `9.0` …: any valid CUDA version in the form `major.minor`.
*`cuda>=7.5`, `cuda>=8.0`, `cuda>=9.0` …: any valid CUDA version in the form `major.minor`.
### `CUDA_VERSION`
### `CUDA_VERSION`
Similar to `NVIDIA_CUDA_VERSION`, for legacy CUDA images.
Similar to `NVIDIA_REQUIRE_CUDA`, for legacy CUDA images.
In addition, if `NVIDIA_CUDA_VERSION` is not set, `NVIDIA_VISIBLE_DEVICES` and `NVIDIA_DRIVER_CAPABILITIES` will default to `all`.
In addition, if `NVIDIA_REQUIRE_CUDA` is not set, `NVIDIA_VISIBLE_DEVICES` and `NVIDIA_DRIVER_CAPABILITIES` will default to `all`.
