Add nvidia-container-runtime.runtimes config option

This change adds an nvidia-container-runtime.runtimes config option.

If this is unset no changes are made to the config and the default values are used. This
allows this setting to be overridden in cases where this is required. One such example is
crio where crun is set as the default runtime.

Signed-off-by: Evan Lezar <elezar@nvidia.com>

tools/container/toolkit/toolkit.go

@@ -53,6 +53,8 @@ type options struct {
 	ContainerRuntimeModesCdiDefaultKind        string
 	ContainerRuntimeModesCDIAnnotationPrefixes cli.StringSlice
 
+	ContainerRuntimeRuntimes cli.StringSlice
+
 	ContainerRuntimeHookSkipModeDetection bool
 
 	ContainerCLIDebug string
@@ -152,6 +154,11 @@ func main() {
 			Destination: &opts.ContainerRuntimeModesCDIAnnotationPrefixes,
 			EnvVars:     []string{"NVIDIA_CONTAINER_RUNTIME_MODES_CDI_ANNOTATION_PREFIXES"},
 		},
+		&cli.StringSliceFlag{
+			Name:        "nvidia-container-runtime.runtimes",
+			Destination: &opts.ContainerRuntimeRuntimes,
+			EnvVars:     []string{"NVIDIA_CONTAINER_RUNTIME_RUNTIMES"},
+		},
 		&cli.BoolFlag{
 			Name:        "nvidia-container-runtime-hook.skip-mode-detection",
 			Value:       true,
@@ -415,6 +422,7 @@ func installToolkitConfig(c *cli.Context, toolkitConfigPath string, nvidiaContai
 		"nvidia-container-runtime.mode":                          opts.ContainerRuntimeMode,
 		"nvidia-container-runtime.modes.cdi.annotation-prefixes": opts.ContainerRuntimeModesCDIAnnotationPrefixes,
 		"nvidia-container-runtime.modes.cdi.default-kind":        opts.ContainerRuntimeModesCdiDefaultKind,
+		"nvidia-container-runtime.runtimes":                      opts.ContainerRuntimeRuntimes,
 		"nvidia-container-cli.debug":                             opts.ContainerCLIDebug,
 	}
 	for key, value := range optionalConfigValues {