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[no-relnote] Refactor config handling for hook
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This change removes indirect calls to get the default config
from the nvidia-container-runtime-hook.

Signed-off-by: Evan Lezar <elezar@nvidia.com>
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@elezar
elezar committed Nov 26, 2024
1 parent 0322f85 commit c90338d
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Showing 5 changed files with 74 additions and 54 deletions.
20 changes: 10 additions & 10 deletions cmd/nvidia-container-runtime-hook/container_config.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -157,7 +157,7 @@ func getDevicesFromEnvvar(containerImage image.CUDA, swarmResourceEnvvars []stri
return containerImage.VisibleDevicesFromEnvVar()
}

func getDevices(hookConfig *HookConfig, image image.CUDA, privileged bool) []string {
func (hookConfig *hookConfig) getDevices(image image.CUDA, privileged bool) []string {
// If enabled, try and get the device list from volume mounts first
if hookConfig.AcceptDeviceListAsVolumeMounts {
devices := image.VisibleDevicesFromMounts()
Expand Down Expand Up @@ -197,7 +197,7 @@ func getMigDevices(image image.CUDA, envvar string) *string {
return &devices
}

func getImexChannels(hookConfig *HookConfig, image image.CUDA, privileged bool) []string {
func (hookConfig *hookConfig) getImexChannels(image image.CUDA, privileged bool) []string {
// If enabled, try and get the device list from volume mounts first
if hookConfig.AcceptDeviceListAsVolumeMounts {
devices := image.ImexChannelsFromMounts()
Expand All @@ -217,10 +217,10 @@ func getImexChannels(hookConfig *HookConfig, image image.CUDA, privileged bool)
return nil
}

func (c *HookConfig) getDriverCapabilities(cudaImage image.CUDA, legacyImage bool) image.DriverCapabilities {
func (hookConfig *hookConfig) getDriverCapabilities(cudaImage image.CUDA, legacyImage bool) image.DriverCapabilities {
// We use the default driver capabilities by default. This is filtered to only include the
// supported capabilities
supportedDriverCapabilities := image.NewDriverCapabilities(c.SupportedDriverCapabilities)
supportedDriverCapabilities := image.NewDriverCapabilities(hookConfig.SupportedDriverCapabilities)

capabilities := supportedDriverCapabilities.Intersection(image.DefaultDriverCapabilities)

Expand All @@ -244,10 +244,10 @@ func (c *HookConfig) getDriverCapabilities(cudaImage image.CUDA, legacyImage boo
return capabilities
}

func getNvidiaConfig(hookConfig *HookConfig, image image.CUDA, privileged bool) *nvidiaConfig {
func (hookConfig *hookConfig) getNvidiaConfig(image image.CUDA, privileged bool) *nvidiaConfig {
legacyImage := image.IsLegacy()

devices := getDevices(hookConfig, image, privileged)
devices := hookConfig.getDevices(image, privileged)
if len(devices) == 0 {
// empty devices means this is not a GPU container.
return nil
Expand All @@ -269,7 +269,7 @@ func getNvidiaConfig(hookConfig *HookConfig, image image.CUDA, privileged bool)
log.Panicln("cannot set MIG_MONITOR_DEVICES in non privileged container")
}

imexChannels := getImexChannels(hookConfig, image, privileged)
imexChannels := hookConfig.getImexChannels(image, privileged)

driverCapabilities := hookConfig.getDriverCapabilities(image, legacyImage).String()

Expand All @@ -288,7 +288,7 @@ func getNvidiaConfig(hookConfig *HookConfig, image image.CUDA, privileged bool)
}
}

func getContainerConfig(hook HookConfig) (config containerConfig) {
func (hookConfig *hookConfig) getContainerConfig() (config containerConfig) {
var h HookState
d := json.NewDecoder(os.Stdin)
if err := d.Decode(&h); err != nil {
Expand All @@ -305,7 +305,7 @@ func getContainerConfig(hook HookConfig) (config containerConfig) {
image, err := image.New(
image.WithEnv(s.Process.Env),
image.WithMounts(s.Mounts),
image.WithDisableRequire(hook.DisableRequire),
image.WithDisableRequire(hookConfig.DisableRequire),
)
if err != nil {
log.Panicln(err)
Expand All @@ -316,6 +316,6 @@ func getContainerConfig(hook HookConfig) (config containerConfig) {
Pid: h.Pid,
Rootfs: s.Root.Path,
Image: image,
Nvidia: getNvidiaConfig(&hook, image, privileged),
Nvidia: hookConfig.getNvidiaConfig(image, privileged),
}
}
78 changes: 46 additions & 32 deletions cmd/nvidia-container-runtime-hook/container_config_test.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@ import (
"github.com/opencontainers/runtime-spec/specs-go"
"github.com/stretchr/testify/require"

"github.com/NVIDIA/nvidia-container-toolkit/internal/config"
"github.com/NVIDIA/nvidia-container-toolkit/internal/config/image"
)

Expand All @@ -15,7 +16,7 @@ func TestGetNvidiaConfig(t *testing.T) {
description string
env map[string]string
privileged bool
hookConfig *HookConfig
hookConfig *hookConfig
expectedConfig *nvidiaConfig
expectedPanic bool
}{
Expand Down Expand Up @@ -394,8 +395,10 @@ func TestGetNvidiaConfig(t *testing.T) {
image.EnvVarNvidiaDriverCapabilities: "all",
},
privileged: true,
hookConfig: &HookConfig{
SupportedDriverCapabilities: "video,display",
hookConfig: &hookConfig{
Config: &config.Config{
SupportedDriverCapabilities: "video,display",
},
},
expectedConfig: &nvidiaConfig{
Devices: []string{"all"},
Expand All @@ -409,8 +412,10 @@ func TestGetNvidiaConfig(t *testing.T) {
image.EnvVarNvidiaDriverCapabilities: "video,display",
},
privileged: true,
hookConfig: &HookConfig{
SupportedDriverCapabilities: "video,display,compute,utility",
hookConfig: &hookConfig{
Config: &config.Config{
SupportedDriverCapabilities: "video,display,compute,utility",
},
},
expectedConfig: &nvidiaConfig{
Devices: []string{"all"},
Expand All @@ -423,8 +428,10 @@ func TestGetNvidiaConfig(t *testing.T) {
image.EnvVarNvidiaVisibleDevices: "all",
},
privileged: true,
hookConfig: &HookConfig{
SupportedDriverCapabilities: "video,display,utility,compute",
hookConfig: &hookConfig{
Config: &config.Config{
SupportedDriverCapabilities: "video,display,utility,compute",
},
},
expectedConfig: &nvidiaConfig{
Devices: []string{"all"},
Expand All @@ -438,9 +445,11 @@ func TestGetNvidiaConfig(t *testing.T) {
"DOCKER_SWARM_RESOURCE": "GPU1,GPU2",
},
privileged: true,
hookConfig: &HookConfig{
SwarmResource: "DOCKER_SWARM_RESOURCE",
SupportedDriverCapabilities: "video,display,utility,compute",
hookConfig: &hookConfig{
Config: &config.Config{
SwarmResource: "DOCKER_SWARM_RESOURCE",
SupportedDriverCapabilities: "video,display,utility,compute",
},
},
expectedConfig: &nvidiaConfig{
Devices: []string{"GPU1", "GPU2"},
Expand All @@ -454,9 +463,11 @@ func TestGetNvidiaConfig(t *testing.T) {
"DOCKER_SWARM_RESOURCE": "GPU1,GPU2",
},
privileged: true,
hookConfig: &HookConfig{
SwarmResource: "NOT_DOCKER_SWARM_RESOURCE,DOCKER_SWARM_RESOURCE",
SupportedDriverCapabilities: "video,display,utility,compute",
hookConfig: &hookConfig{
Config: &config.Config{
SwarmResource: "NOT_DOCKER_SWARM_RESOURCE,DOCKER_SWARM_RESOURCE",
SupportedDriverCapabilities: "video,display,utility,compute",
},
},
expectedConfig: &nvidiaConfig{
Devices: []string{"GPU1", "GPU2"},
Expand All @@ -470,14 +481,14 @@ func TestGetNvidiaConfig(t *testing.T) {
image.WithEnvMap(tc.env),
)
// Wrap the call to getNvidiaConfig() in a closure.
var config *nvidiaConfig
var cfg *nvidiaConfig
getConfig := func() {
hookConfig := tc.hookConfig
if hookConfig == nil {
defaultConfig, _ := getDefaultHookConfig()
hookConfig = &defaultConfig
hookCfg := tc.hookConfig
if hookCfg == nil {
defaultConfig, _ := config.GetDefault()
hookCfg = &hookConfig{defaultConfig}
}
config = getNvidiaConfig(hookConfig, image, tc.privileged)
cfg = hookCfg.getNvidiaConfig(image, tc.privileged)
}

// For any tests that are expected to panic, make sure they do.
Expand All @@ -491,18 +502,18 @@ func TestGetNvidiaConfig(t *testing.T) {

// And start comparing the test results to the expected results.
if tc.expectedConfig == nil {
require.Nil(t, config, tc.description)
require.Nil(t, cfg, tc.description)
return
}

require.NotNil(t, config, tc.description)
require.NotNil(t, cfg, tc.description)

require.Equal(t, tc.expectedConfig.Devices, config.Devices)
require.Equal(t, tc.expectedConfig.MigConfigDevices, config.MigConfigDevices)
require.Equal(t, tc.expectedConfig.MigMonitorDevices, config.MigMonitorDevices)
require.Equal(t, tc.expectedConfig.DriverCapabilities, config.DriverCapabilities)
require.Equal(t, tc.expectedConfig.Devices, cfg.Devices)
require.Equal(t, tc.expectedConfig.MigConfigDevices, cfg.MigConfigDevices)
require.Equal(t, tc.expectedConfig.MigMonitorDevices, cfg.MigMonitorDevices)
require.Equal(t, tc.expectedConfig.DriverCapabilities, cfg.DriverCapabilities)

require.ElementsMatch(t, tc.expectedConfig.Requirements, config.Requirements)
require.ElementsMatch(t, tc.expectedConfig.Requirements, cfg.Requirements)
})
}
}
Expand Down Expand Up @@ -612,10 +623,11 @@ func TestDeviceListSourcePriority(t *testing.T) {
),
image.WithMounts(tc.mountDevices),
)
hookConfig, _ := getDefaultHookConfig()
hookConfig.AcceptEnvvarUnprivileged = tc.acceptUnprivileged
hookConfig.AcceptDeviceListAsVolumeMounts = tc.acceptMounts
devices = getDevices(&hookConfig, image, tc.privileged)
defaultConfig, _ := config.GetDefault()
cfg := &hookConfig{defaultConfig}
cfg.AcceptEnvvarUnprivileged = tc.acceptUnprivileged
cfg.AcceptDeviceListAsVolumeMounts = tc.acceptMounts
devices = cfg.getDevices(image, tc.privileged)
}

// For all other tests, just grab the devices and check the results
Expand Down Expand Up @@ -940,8 +952,10 @@ func TestGetDriverCapabilities(t *testing.T) {
t.Run(tc.description, func(t *testing.T) {
var capabilities string

c := HookConfig{
SupportedDriverCapabilities: tc.supportedCapabilities,
c := hookConfig{
Config: &config.Config{
SupportedDriverCapabilities: tc.supportedCapabilities,
},
}

image, _ := image.New(
Expand Down
15 changes: 9 additions & 6 deletions cmd/nvidia-container-runtime-hook/hook_config.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -17,8 +17,11 @@ const (
driverPath = "/run/nvidia/driver"
)

// HookConfig : options for the nvidia-container-runtime-hook.
type HookConfig config.Config
// hookConfig wraps the toolkit config.
// This allows for functions to be defined on the local type.
type hookConfig struct {
*config.Config
}

// loadConfig loads the required paths for the hook config.
func loadConfig() (*config.Config, error) {
Expand Down Expand Up @@ -47,12 +50,12 @@ func loadConfig() (*config.Config, error) {
return config.GetDefault()
}

func getHookConfig() (*HookConfig, error) {
func getHookConfig() (*hookConfig, error) {
cfg, err := loadConfig()
if err != nil {
return nil, fmt.Errorf("failed to load config: %v", err)
}
config := (*HookConfig)(cfg)
config := &hookConfig{cfg}

allSupportedDriverCapabilities := image.SupportedDriverCapabilities
if config.SupportedDriverCapabilities == "all" {
Expand All @@ -70,7 +73,7 @@ func getHookConfig() (*HookConfig, error) {

// getConfigOption returns the toml config option associated with the
// specified struct field.
func (c HookConfig) getConfigOption(fieldName string) string {
func (c hookConfig) getConfigOption(fieldName string) string {
t := reflect.TypeOf(c)
f, ok := t.FieldByName(fieldName)
if !ok {
Expand All @@ -84,7 +87,7 @@ func (c HookConfig) getConfigOption(fieldName string) string {
}

// getSwarmResourceEnvvars returns the swarm resource envvars for the config.
func (c *HookConfig) getSwarmResourceEnvvars() []string {
func (c *hookConfig) getSwarmResourceEnvvars() []string {
if c.SwarmResource == "" {
return nil
}
Expand Down
13 changes: 8 additions & 5 deletions cmd/nvidia-container-runtime-hook/hook_config_test.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,7 @@ import (

"github.com/stretchr/testify/require"

"github.com/NVIDIA/nvidia-container-toolkit/internal/config"
"github.com/NVIDIA/nvidia-container-toolkit/internal/config/image"
)

Expand Down Expand Up @@ -89,10 +90,10 @@ func TestGetHookConfig(t *testing.T) {
}
}

var config HookConfig
var cfg hookConfig
getHookConfig := func() {
c, _ := getHookConfig()
config = *c
cfg = *c
}

if tc.expectedPanic {
Expand All @@ -102,7 +103,7 @@ func TestGetHookConfig(t *testing.T) {

getHookConfig()

require.EqualValues(t, tc.expectedDriverCapabilities, config.SupportedDriverCapabilities)
require.EqualValues(t, tc.expectedDriverCapabilities, cfg.SupportedDriverCapabilities)
})
}
}
Expand Down Expand Up @@ -144,8 +145,10 @@ func TestGetSwarmResourceEnvvars(t *testing.T) {

for i, tc := range testCases {
t.Run(fmt.Sprintf("%d", i), func(t *testing.T) {
c := &HookConfig{
SwarmResource: tc.value,
c := &hookConfig{
Config: &config.Config{
SwarmResource: tc.value,
},
}

envvars := c.getSwarmResourceEnvvars()
Expand Down
2 changes: 1 addition & 1 deletion cmd/nvidia-container-runtime-hook/main.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -75,7 +75,7 @@ func doPrestart() {
}
cli := hook.NVIDIAContainerCLIConfig

container := getContainerConfig(*hook)
container := hook.getContainerConfig()
nvidia := container.Nvidia
if nvidia == nil {
// Not a GPU container, nothing to do.
Expand Down

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