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Add support for drop-in configs
This change adds explicit support for drop-in configs as supported by containerd and cri-o. Signed-off-by: Evan Lezar <[email protected]> Co-authored-by: Christopher Desiniotis <[email protected]>
1 parent 39e13ab commit c5dc4f4

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2 files changed

+215
-36
lines changed

2 files changed

+215
-36
lines changed

‎controllers/object_controls.go‎

Lines changed: 91 additions & 33 deletions
Original file line numberDiff line numberDiff line change
@@ -57,16 +57,18 @@ import (
5757
const (
5858
// DefaultContainerdConfigFile indicates default config file path for containerd
5959
DefaultContainerdConfigFile = "/etc/containerd/config.toml"
60+
// DefaultContainerdDropInConfigFile indicates default drop-in config file path for containerd
61+
DefaultContainerdDropInConfigFile = "/run/nvidia/toolkit/config/99-nvidia.toml"
6062
// DefaultContainerdSocketFile indicates default containerd socket file
6163
DefaultContainerdSocketFile = "/run/containerd/containerd.sock"
6264
// DefaultDockerConfigFile indicates default config file path for docker
6365
DefaultDockerConfigFile = "/etc/docker/daemon.json"
6466
// DefaultDockerSocketFile indicates default docker socket file
6567
DefaultDockerSocketFile = "/var/run/docker.sock"
66-
// DefaultCRIOConfigFile indicates default config file path for cri-o.
67-
// Note, config files in the drop-in directory, /etc/crio/crio.conf.d,
68-
// have a higher priority than the default /etc/crio/crio.conf file.
69-
DefaultCRIOConfigFile = "/etc/crio/crio.conf.d/99-nvidia.conf"
68+
// DefaultCRIOConfigFile indicates default config file path for cri-o. .
69+
DefaultCRIOConfigFile = "/etc/crio/config.toml"
70+
// DefaultCRIODropInConfigFile indicates the default path to the drop-in config file for cri-o
71+
DefaultCRIODropInConfigFile = "/etc/crio/crio.conf.d/99-nvidia.conf"
7072
// TrustedCAConfigMapName indicates configmap with custom user CA injected
7173
TrustedCAConfigMapName = "gpu-operator-trusted-ca"
7274
// TrustedCABundleFileName indicates custom user ca certificate filename
@@ -95,6 +97,8 @@ const (
9597
DefaultRuntimeSocketTargetDir = "/runtime/sock-dir/"
9698
// DefaultRuntimeConfigTargetDir represents target directory where runtime socket dirctory will be mounted
9799
DefaultRuntimeConfigTargetDir = "/runtime/config-dir/"
100+
// DefaultRuntimeDropInConfigTargetDir represents target directory where drop-in config directory will be mounted
101+
DefaultRuntimeDropInConfigTargetDir = "/runtime/config-dir.d/"
98102
// ValidatorImageEnvName indicates env name for validator image passed
99103
ValidatorImageEnvName = "VALIDATOR_IMAGE"
100104
// ValidatorImagePullPolicyEnvName indicates env name for validator image pull policy passed
@@ -1355,32 +1359,56 @@ func transformForRuntime(obj *appsv1.DaemonSet, config *gpuv1.ClusterPolicySpec,
13551359
setContainerEnv(mainContainer, CRIOConfigModeEnvName, "config")
13561360
}
13571361

1362+
// For runtime config files we have top-level configs and drop-in files.
1363+
// These are supported as follows:
1364+
// * Docker only supports top-level config files.
1365+
// * Containerd supports drop-in files, but required modification to the top-level config
1366+
// * Crio supports drop-in files at a predefined location. The top-level config may be read
1367+
// but should not be updated.
1368+
13581369
// setup mounts for runtime config file
1359-
runtimeConfigFile, err := getRuntimeConfigFile(mainContainer, runtime)
1370+
runtimeConfigFiles, err := getRuntimeConfigFiles(mainContainer, runtime)
13601371
if err != nil {
13611372
return fmt.Errorf("error getting path to runtime config file: %v", err)
13621373
}
1363-
sourceConfigFileName := path.Base(runtimeConfigFile)
13641374

1365-
var configEnvvarName string
1366-
switch runtime {
1367-
case gpuv1.Containerd.String():
1368-
configEnvvarName = "CONTAINERD_CONFIG"
1369-
case gpuv1.Docker.String():
1370-
configEnvvarName = "DOCKER_CONFIG"
1371-
case gpuv1.CRIO.String():
1372-
configEnvvarName = "CRIO_CONFIG"
1375+
// Handle the top-level configs
1376+
if runtimeConfigFiles.topLevelConfigFile != "" {
1377+
sourceConfigFileName := path.Base(runtimeConfigFiles.topLevelConfigFile)
1378+
sourceConfigDir := path.Dir(runtimeConfigFiles.topLevelConfigFile)
1379+
containerConfigDir := DefaultRuntimeConfigTargetDir
1380+
setContainerEnv(mainContainer, "RUNTIME_CONFIG", containerConfigDir+sourceConfigFileName)
1381+
setContainerEnv(mainContainer, runtimeConfigFiles.envvarName, containerConfigDir+sourceConfigFileName)
1382+
1383+
volMountConfigName := fmt.Sprintf("%s-config", runtime)
1384+
volMountConfig := corev1.VolumeMount{Name: volMountConfigName, MountPath: containerConfigDir}
1385+
mainContainer.VolumeMounts = append(mainContainer.VolumeMounts, volMountConfig)
1386+
1387+
configVol := corev1.Volume{Name: volMountConfigName, VolumeSource: corev1.VolumeSource{HostPath: &corev1.HostPathVolumeSource{Path: sourceConfigDir, Type: newHostPathType(corev1.HostPathDirectoryOrCreate)}}}
1388+
obj.Spec.Template.Spec.Volumes = append(obj.Spec.Template.Spec.Volumes, configVol)
13731389
}
13741390

1375-
setContainerEnv(mainContainer, "RUNTIME_CONFIG", DefaultRuntimeConfigTargetDir+sourceConfigFileName)
1376-
setContainerEnv(mainContainer, configEnvvarName, DefaultRuntimeConfigTargetDir+sourceConfigFileName)
1391+
// Handle the drop-in configs
1392+
// TODO: It's a bit of a hack to skip the `nvidia-kata-manager` container here.
1393+
// Ideally if the two projects are using the SAME API then this should be
1394+
// captured more rigorously.
1395+
// Note that we probably want to implement drop-in file support in the
1396+
// kata manager in any case -- in which case it will be good to use a
1397+
// similar implementation.
1398+
if runtimeConfigFiles.dropInConfigFile != "" && containerName != "nvidia-kata-manager" {
1399+
sourceConfigFileName := path.Base(runtimeConfigFiles.dropInConfigFile)
1400+
sourceConfigDir := path.Dir(runtimeConfigFiles.dropInConfigFile)
1401+
containerConfigDir := DefaultRuntimeDropInConfigTargetDir
1402+
setContainerEnv(mainContainer, "RUNTIME_DROP_IN_CONFIG", containerConfigDir+sourceConfigFileName)
1403+
setContainerEnv(mainContainer, "RUNTIME_DROP_IN_CONFIG_HOST_PATH", runtimeConfigFiles.dropInConfigFile)
13771404

1378-
volMountConfigName := fmt.Sprintf("%s-config", runtime)
1379-
volMountConfig := corev1.VolumeMount{Name: volMountConfigName, MountPath: DefaultRuntimeConfigTargetDir}
1380-
mainContainer.VolumeMounts = append(mainContainer.VolumeMounts, volMountConfig)
1405+
volMountConfigName := fmt.Sprintf("%s-drop-in-config", runtime)
1406+
volMountConfig := corev1.VolumeMount{Name: volMountConfigName, MountPath: containerConfigDir}
1407+
mainContainer.VolumeMounts = append(mainContainer.VolumeMounts, volMountConfig)
13811408

1382-
configVol := corev1.Volume{Name: volMountConfigName, VolumeSource: corev1.VolumeSource{HostPath: &corev1.HostPathVolumeSource{Path: path.Dir(runtimeConfigFile), Type: newHostPathType(corev1.HostPathDirectoryOrCreate)}}}
1383-
obj.Spec.Template.Spec.Volumes = append(obj.Spec.Template.Spec.Volumes, configVol)
1409+
configVol := corev1.Volume{Name: volMountConfigName, VolumeSource: corev1.VolumeSource{HostPath: &corev1.HostPathVolumeSource{Path: sourceConfigDir, Type: newHostPathType(corev1.HostPathDirectoryOrCreate)}}}
1410+
obj.Spec.Template.Spec.Volumes = append(obj.Spec.Template.Spec.Volumes, configVol)
1411+
}
13841412

13851413
// setup mounts for runtime socket file
13861414
runtimeSocketFile, err := getRuntimeSocketFile(mainContainer, runtime)
@@ -2396,30 +2424,60 @@ func TransformNodeStatusExporter(obj *appsv1.DaemonSet, config *gpuv1.ClusterPol
23962424
return nil
23972425
}
23982426

2427+
type runtimeConfigFiles struct {
2428+
envvarName string
2429+
topLevelConfigFile string
2430+
dropInConfigFile string
2431+
}
2432+
23992433
// get runtime(docker, containerd) config file path based on toolkit container env or default
2400-
func getRuntimeConfigFile(c *corev1.Container, runtime string) (string, error) {
2401-
var runtimeConfigFile string
2434+
func getRuntimeConfigFiles(c *corev1.Container, runtime string) (runtimeConfigFiles, error) {
24022435
switch runtime {
24032436
case gpuv1.Docker.String():
2404-
runtimeConfigFile = DefaultDockerConfigFile
2437+
topLevelConfigFile := DefaultDockerConfigFile
24052438
if value := getContainerEnv(c, "DOCKER_CONFIG"); value != "" {
2406-
runtimeConfigFile = value
2407-
}
2439+
topLevelConfigFile = value
2440+
}
2441+
return runtimeConfigFiles{
2442+
topLevelConfigFile: topLevelConfigFile,
2443+
// Docker does not support drop-in files.
2444+
dropInConfigFile: "",
2445+
envvarName: "DOCKER_CONFIG",
2446+
}, nil
24082447
case gpuv1.Containerd.String():
2409-
runtimeConfigFile = DefaultContainerdConfigFile
2448+
topLevelConfigFile := DefaultContainerdConfigFile
2449+
// TODO: We should also read RUNTIME_CONFIG here
24102450
if value := getContainerEnv(c, "CONTAINERD_CONFIG"); value != "" {
2411-
runtimeConfigFile = value
2451+
topLevelConfigFile = value
2452+
}
2453+
dropInConfigFile := DefaultContainerdDropInConfigFile
2454+
if value := getContainerEnv(c, "RUNTIME_DROP_IN_CONFIG"); value != "" {
2455+
dropInConfigFile = value
24122456
}
2457+
return runtimeConfigFiles{
2458+
topLevelConfigFile: topLevelConfigFile,
2459+
dropInConfigFile: dropInConfigFile,
2460+
envvarName: "CONTAINERD_CONFIG",
2461+
}, nil
24132462
case gpuv1.CRIO.String():
2414-
runtimeConfigFile = DefaultCRIOConfigFile
2463+
// TODO: We should still allow the top-level config to be specified
2464+
// TODO: We should also read RUNTIME_CONFIG here
2465+
topLevelConfigFile := DefaultCRIOConfigFile
24152466
if value := getContainerEnv(c, "CRIO_CONFIG"); value != "" {
2416-
runtimeConfigFile = value
2467+
topLevelConfigFile = value
24172468
}
2469+
dropInConfigFile := DefaultCRIODropInConfigFile
2470+
if value := getContainerEnv(c, "RUNTIME_DROP_IN_CONFIG"); value != "" {
2471+
dropInConfigFile = value
2472+
}
2473+
return runtimeConfigFiles{
2474+
topLevelConfigFile: topLevelConfigFile,
2475+
dropInConfigFile: dropInConfigFile,
2476+
envvarName: "CRIO_CONFIG",
2477+
}, nil
24182478
default:
2419-
return "", fmt.Errorf("invalid runtime: %s", runtime)
2479+
return runtimeConfigFiles{}, fmt.Errorf("invalid runtime: %s", runtime)
24202480
}
2421-
2422-
return runtimeConfigFile, nil
24232481
}
24242482

24252483
// get runtime(docker, containerd) socket file path based on toolkit container env or default

‎controllers/transforms_test.go‎

Lines changed: 124 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -332,6 +332,7 @@ func TestTransformForRuntime(t *testing.T) {
332332
WithContainer(corev1.Container{Name: "test-ctr"}),
333333
expectedOutput: NewDaemonset().
334334
WithHostPathVolume("containerd-config", filepath.Dir(DefaultContainerdConfigFile), newHostPathType(corev1.HostPathDirectoryOrCreate)).
335+
WithHostPathVolume("containerd-drop-in-config", "/run/nvidia/toolkit/config", newHostPathType(corev1.HostPathDirectoryOrCreate)).
335336
WithHostPathVolume("containerd-socket", filepath.Dir(DefaultContainerdSocketFile), nil).
336337
WithContainer(corev1.Container{
337338
Name: "test-ctr",
@@ -340,11 +341,14 @@ func TestTransformForRuntime(t *testing.T) {
340341
{Name: "CONTAINERD_RUNTIME_CLASS", Value: DefaultRuntimeClass},
341342
{Name: "RUNTIME_CONFIG", Value: filepath.Join(DefaultRuntimeConfigTargetDir, filepath.Base(DefaultContainerdConfigFile))},
342343
{Name: "CONTAINERD_CONFIG", Value: filepath.Join(DefaultRuntimeConfigTargetDir, filepath.Base(DefaultContainerdConfigFile))},
344+
{Name: "RUNTIME_DROP_IN_CONFIG", Value: "/runtime/config-dir.d/99-nvidia.toml"},
345+
{Name: "RUNTIME_DROP_IN_CONFIG_HOST_PATH", Value: "/run/nvidia/toolkit/config/99-nvidia.toml"},
343346
{Name: "RUNTIME_SOCKET", Value: filepath.Join(DefaultRuntimeSocketTargetDir, filepath.Base(DefaultContainerdSocketFile))},
344347
{Name: "CONTAINERD_SOCKET", Value: filepath.Join(DefaultRuntimeSocketTargetDir, filepath.Base(DefaultContainerdSocketFile))},
345348
},
346349
VolumeMounts: []corev1.VolumeMount{
347350
{Name: "containerd-config", MountPath: DefaultRuntimeConfigTargetDir},
351+
{Name: "containerd-drop-in-config", MountPath: "/runtime/config-dir.d/"},
348352
{Name: "containerd-socket", MountPath: DefaultRuntimeSocketTargetDir},
349353
},
350354
}),
@@ -354,17 +358,21 @@ func TestTransformForRuntime(t *testing.T) {
354358
runtime: gpuv1.CRIO,
355359
input: NewDaemonset().WithContainer(corev1.Container{Name: "test-ctr"}),
356360
expectedOutput: NewDaemonset().
357-
WithHostPathVolume("crio-config", filepath.Dir(DefaultCRIOConfigFile), newHostPathType(corev1.HostPathDirectoryOrCreate)).
361+
WithHostPathVolume("crio-config", "/etc/crio", newHostPathType(corev1.HostPathDirectoryOrCreate)).
362+
WithHostPathVolume("crio-drop-in-config", "/etc/crio/crio.conf.d", newHostPathType(corev1.HostPathDirectoryOrCreate)).
358363
WithContainer(corev1.Container{
359364
Name: "test-ctr",
360365
Env: []corev1.EnvVar{
361366
{Name: "RUNTIME", Value: gpuv1.CRIO.String()},
362367
{Name: CRIOConfigModeEnvName, Value: "config"},
363-
{Name: "RUNTIME_CONFIG", Value: filepath.Join(DefaultRuntimeConfigTargetDir, filepath.Base(DefaultCRIOConfigFile))},
364-
{Name: "CRIO_CONFIG", Value: filepath.Join(DefaultRuntimeConfigTargetDir, filepath.Base(DefaultCRIOConfigFile))},
368+
{Name: "RUNTIME_CONFIG", Value: "/runtime/config-dir/config.toml"},
369+
{Name: "CRIO_CONFIG", Value: "/runtime/config-dir/config.toml"},
370+
{Name: "RUNTIME_DROP_IN_CONFIG", Value: "/runtime/config-dir.d/99-nvidia.conf"},
371+
{Name: "RUNTIME_DROP_IN_CONFIG_HOST_PATH", Value: "/etc/crio/crio.conf.d/99-nvidia.conf"},
365372
},
366373
VolumeMounts: []corev1.VolumeMount{
367374
{Name: "crio-config", MountPath: DefaultRuntimeConfigTargetDir},
375+
{Name: "crio-drop-in-config", MountPath: "/runtime/config-dir.d/"},
368376
},
369377
}),
370378
},
@@ -657,15 +665,19 @@ func TestTransformToolkit(t *testing.T) {
657665
{Name: "CONTAINERD_RUNTIME_CLASS", Value: "nvidia"},
658666
{Name: "RUNTIME_CONFIG", Value: "/runtime/config-dir/config.toml"},
659667
{Name: "CONTAINERD_CONFIG", Value: "/runtime/config-dir/config.toml"},
668+
{Name: "RUNTIME_DROP_IN_CONFIG", Value: "/runtime/config-dir.d/99-nvidia.toml"},
669+
{Name: "RUNTIME_DROP_IN_CONFIG_HOST_PATH", Value: "/run/nvidia/toolkit/config/99-nvidia.toml"},
660670
{Name: "RUNTIME_SOCKET", Value: "/runtime/sock-dir/containerd.sock"},
661671
{Name: "CONTAINERD_SOCKET", Value: "/runtime/sock-dir/containerd.sock"},
662672
},
663673
VolumeMounts: []corev1.VolumeMount{
664674
{Name: "containerd-config", MountPath: "/runtime/config-dir/"},
675+
{Name: "containerd-drop-in-config", MountPath: "/runtime/config-dir.d/"},
665676
{Name: "containerd-socket", MountPath: "/runtime/sock-dir/"},
666677
},
667678
}).
668679
WithHostPathVolume("containerd-config", "/etc/containerd", newHostPathType(corev1.HostPathDirectoryOrCreate)).
680+
WithHostPathVolume("containerd-drop-in-config", "/run/nvidia/toolkit/config", newHostPathType(corev1.HostPathDirectoryOrCreate)).
669681
WithHostPathVolume("containerd-socket", "/run/containerd", nil).
670682
WithPullSecret("pull-secret"),
671683
},
@@ -731,14 +743,18 @@ func TestTransformToolkit(t *testing.T) {
731743
{Name: "CONTAINERD_SET_AS_DEFAULT", Value: "true"},
732744
{Name: "RUNTIME", Value: "containerd"},
733745
{Name: "RUNTIME_CONFIG", Value: "/runtime/config-dir/config.toml"},
746+
{Name: "RUNTIME_DROP_IN_CONFIG", Value: "/runtime/config-dir.d/99-nvidia.toml"},
747+
{Name: "RUNTIME_DROP_IN_CONFIG_HOST_PATH", Value: "/run/nvidia/toolkit/config/99-nvidia.toml"},
734748
{Name: "RUNTIME_SOCKET", Value: "/runtime/sock-dir/containerd.sock"},
735749
},
736750
VolumeMounts: []corev1.VolumeMount{
737751
{Name: "containerd-config", MountPath: "/runtime/config-dir/"},
752+
{Name: "containerd-drop-in-config", MountPath: "/runtime/config-dir.d/"},
738753
{Name: "containerd-socket", MountPath: "/runtime/sock-dir/"},
739754
},
740755
}).
741756
WithHostPathVolume("containerd-config", "/var/lib/rancher/k3s/agent/etc/containerd", newHostPathType(corev1.HostPathDirectoryOrCreate)).
757+
WithHostPathVolume("containerd-drop-in-config", "/run/nvidia/toolkit/config", newHostPathType(corev1.HostPathDirectoryOrCreate)).
742758
WithHostPathVolume("containerd-socket", "/run/k3s/containerd", nil).
743759
WithPullSecret("pull-secret"),
744760
},
@@ -2261,3 +2277,108 @@ func TestTransformDevicePluginCtrForCDI(t *testing.T) {
22612277
})
22622278
}
22632279
}
2280+
2281+
func TestGetRuntimeConfigFiles(t *testing.T) {
2282+
testCases := []struct {
2283+
description string
2284+
container corev1.Container
2285+
runtime string
2286+
expectedRuntimeConfigFiles runtimeConfigFiles
2287+
errorExpected bool
2288+
}{
2289+
{
2290+
description: "invalid runtime",
2291+
container: corev1.Container{},
2292+
runtime: "foo",
2293+
expectedRuntimeConfigFiles: runtimeConfigFiles{},
2294+
errorExpected: true,
2295+
},
2296+
{
2297+
description: "docker",
2298+
container: corev1.Container{},
2299+
runtime: gpuv1.Docker.String(),
2300+
expectedRuntimeConfigFiles: runtimeConfigFiles{
2301+
topLevelConfigFile: DefaultDockerConfigFile,
2302+
dropInConfigFile: "",
2303+
envvarName: "DOCKER_CONFIG",
2304+
},
2305+
},
2306+
{
2307+
description: "docker, config path overridden",
2308+
container: corev1.Container{
2309+
Env: []corev1.EnvVar{
2310+
{Name: "DOCKER_CONFIG", Value: "/path/to/docker/daemon.json"},
2311+
},
2312+
},
2313+
runtime: gpuv1.Docker.String(),
2314+
expectedRuntimeConfigFiles: runtimeConfigFiles{
2315+
topLevelConfigFile: "/path/to/docker/daemon.json",
2316+
dropInConfigFile: "",
2317+
envvarName: "DOCKER_CONFIG",
2318+
},
2319+
},
2320+
{
2321+
description: "containerd",
2322+
container: corev1.Container{},
2323+
runtime: gpuv1.Containerd.String(),
2324+
expectedRuntimeConfigFiles: runtimeConfigFiles{
2325+
topLevelConfigFile: DefaultContainerdConfigFile,
2326+
dropInConfigFile: DefaultContainerdDropInConfigFile,
2327+
envvarName: "CONTAINERD_CONFIG",
2328+
},
2329+
},
2330+
{
2331+
description: "containerd, config path overridden",
2332+
container: corev1.Container{
2333+
Env: []corev1.EnvVar{
2334+
{Name: "CONTAINERD_CONFIG", Value: "/path/to/containerd/config.toml"},
2335+
{Name: "RUNTIME_DROP_IN_CONFIG", Value: "/path/to/containerd/drop-in/config.toml"},
2336+
},
2337+
},
2338+
runtime: gpuv1.Containerd.String(),
2339+
expectedRuntimeConfigFiles: runtimeConfigFiles{
2340+
topLevelConfigFile: "/path/to/containerd/config.toml",
2341+
dropInConfigFile: "/path/to/containerd/drop-in/config.toml",
2342+
envvarName: "CONTAINERD_CONFIG",
2343+
},
2344+
},
2345+
{
2346+
description: "crio",
2347+
container: corev1.Container{},
2348+
runtime: gpuv1.CRIO.String(),
2349+
expectedRuntimeConfigFiles: runtimeConfigFiles{
2350+
topLevelConfigFile: DefaultCRIOConfigFile,
2351+
dropInConfigFile: DefaultCRIODropInConfigFile,
2352+
envvarName: "CRIO_CONFIG",
2353+
},
2354+
},
2355+
{
2356+
description: "crio, config path overridden",
2357+
container: corev1.Container{
2358+
Env: []corev1.EnvVar{
2359+
{Name: "CRIO_CONFIG", Value: "/path/to/crio/config.toml"},
2360+
{Name: "RUNTIME_DROP_IN_CONFIG", Value: "/path/to/crio/drop-in/config.toml"},
2361+
},
2362+
},
2363+
runtime: gpuv1.CRIO.String(),
2364+
expectedRuntimeConfigFiles: runtimeConfigFiles{
2365+
topLevelConfigFile: "/path/to/crio/config.toml",
2366+
dropInConfigFile: "/path/to/crio/drop-in/config.toml",
2367+
envvarName: "CRIO_CONFIG",
2368+
},
2369+
},
2370+
}
2371+
2372+
for _, tc := range testCases {
2373+
t.Run(tc.description, func(t *testing.T) {
2374+
runtimeConfigFiles, err := getRuntimeConfigFiles(&tc.container, tc.runtime)
2375+
if tc.errorExpected {
2376+
require.Error(t, err)
2377+
return
2378+
}
2379+
require.NoError(t, err)
2380+
require.EqualValues(t, tc.expectedRuntimeConfigFiles, runtimeConfigFiles)
2381+
})
2382+
}
2383+
2384+
}

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