Add support for the --no-cgroups argument of nvidia-container-cli

Closes: #25

[fabecassis@nvidia.com: squash commits, change title, add config files, go fmt]
Signed-off-by: NFelix Abecassis <fabecassis@nvidia.com>

hook/config.toml.amzn

@@ -8,5 +8,6 @@ environment = []
 #debug = "/var/log/nvidia-container-runtime-hook.log"
 #ldcache = "/etc/ld.so.cache"
 load-kmods = true
+#no-cgroups = false
 #user = "root:video"
 ldconfig = "@/sbin/ldconfig"

hook/config.toml.centos

@@ -8,5 +8,6 @@ environment = []
 #debug = "/var/log/nvidia-container-runtime-hook.log"
 #ldcache = "/etc/ld.so.cache"
 load-kmods = true
+#no-cgroups = false
 #user = "root:video"
 ldconfig = "@/sbin/ldconfig"

hook/config.toml.debian

@@ -8,5 +8,6 @@ environment = []
 #debug = "/var/log/nvidia-container-runtime-hook.log"
 #ldcache = "/etc/ld.so.cache"
 load-kmods = true
+#no-cgroups = false
 #user = "root:video"
 ldconfig = "@/sbin/ldconfig"

hook/config.toml.ubuntu

@@ -8,5 +8,6 @@ environment = []
 #debug = "/var/log/nvidia-container-runtime-hook.log"
 #ldcache = "/etc/ld.so.cache"
 load-kmods = true
+#no-cgroups = false
 #user = "root:video"
 ldconfig = "@/sbin/ldconfig.real"

hook/nvidia-container-runtime-hook/hook_config.go

@@ -26,6 +26,7 @@ type CLIConfig struct {
 	Debug       *string  `toml:"debug"`
 	Ldcache     *string  `toml:"ldcache"`
 	LoadKmods   bool     `toml:"load-kmods"`
+	NoCgroups   bool     `toml:"no-cgroups"`
 	User        *string  `toml:"user"`
 	Ldconfig    *string  `toml:"ldconfig"`
 }
@@ -48,6 +49,7 @@ func getDefaultHookConfig() (config HookConfig) {
 			Debug:       nil,
 			Ldcache:     nil,
 			LoadKmods:   true,
+			NoCgroups:   false,
 			User:        nil,
 			Ldconfig:    nil,
 		},

hook/nvidia-container-runtime-hook/main.go

@@ -117,7 +117,9 @@ func doPrestart() {
 	if cli.Ldconfig != nil {
 		args = append(args, fmt.Sprintf("--ldconfig=%s", *cli.Ldconfig))
 	}
-
+	if cli.NoCgroups {
+		args = append(args, "--no-cgroups")
+	}
 	if len(nvidia.Devices) > 0 {
 		args = append(args, fmt.Sprintf("--device=%s", nvidia.Devices))
 	}