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32 lines
1.4 KiB
Markdown
32 lines
1.4 KiB
Markdown
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# NVIDIA CDI Hook
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The CLI `nvidia-cdi-hook` provides container device runtime hook capabilities when
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called by a container runtime, as specific in a
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[Container Device Interface](https://tags.cncf.io/container-device-interface/blob/main/SPEC.md)
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file.
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## Generating a CDI
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The CDI itself is created for an NVIDIA-capable device using the
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[`nvidia-ctk cdi generate`](../nvidia-ctk/) command.
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When `nvidia-ctk cdi generate` is run, the CDI specification is generated as a yaml file.
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The CDI specification provides instructions for a container runtime to set up devices, files and
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other resources for the container prior to starting it. Those instructions
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may include executing command-line tools to prepare the filesystem. The execution
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of such command-line tools is called a hook.
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`nvidia-cdi-hook` is the CLI tool that is expected to be called by the container runtime,
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when specified by the CDI file.
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See the [`nvidia-ctk` documentation](../nvidia-ctk/README.md) for more information
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on generating a CDI file.
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## Functionality
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The `nvidia-cdi-hook` CLI provides the following functionality:
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* `chmod` - Change the permissions of a file or directory inside the directory path to be mounted into a container.
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* `create-symlinks` - Create symlinks inside the directory path to be mounted into a container.
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* `update-ldcache` - Update the dynamic linker cache inside the directory path to be mounted into a container.
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