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Log defaulted kube-scheduler component config at startup

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This commit is contained in:
Mike Dame 2020-11-10 14:50:31 -05:00
parent d6ef6d6e43
commit 14fa76d92f
4 changed files with 58 additions and 18 deletions
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37
cmd/kube-scheduler/app/options/configfile.go
View File

@ -19,6 +19,7 @@ package options
import (
"fmt"
"io/ioutil"
"k8s.io/klog/v2"
"os"
"k8s.io/apimachinery/pkg/runtime"
@ -48,8 +49,13 @@ func loadConfig(data []byte) (*kubeschedulerconfig.KubeSchedulerConfiguration, e
return nil, fmt.Errorf("couldn't decode as KubeSchedulerConfiguration, got %s: ", gvk)
}
// WriteConfigFile writes the config into the given file name as YAML.
func WriteConfigFile(fileName string, cfg *kubeschedulerconfig.KubeSchedulerConfiguration) error {
// LogOrWriteConfig logs the completed component config and writes it into the given file name as YAML, if either is enabled
func LogOrWriteConfig(fileName string, cfg *kubeschedulerconfig.KubeSchedulerConfiguration, completedProfiles []kubeschedulerconfig.KubeSchedulerProfile) error {
if !(klog.V(2).Enabled() || len(fileName) > 0) {
return nil
}
cfg.Profiles = completedProfiles
const mediaType = runtime.ContentTypeYAML
info, ok := runtime.SerializerInfoForMediaType(kubeschedulerscheme.Codecs.SupportedMediaTypes(), mediaType)
if !ok {
@ -57,15 +63,26 @@ func WriteConfigFile(fileName string, cfg *kubeschedulerconfig.KubeSchedulerConf
}
encoder := kubeschedulerscheme.Codecs.EncoderForVersion(info.Serializer, kubeschedulerconfigv1beta1.SchemeGroupVersion)
configFile, err := os.Create(fileName)
if err != nil {
return err
}
defer configFile.Close()
if err := encoder.Encode(cfg, configFile); err != nil {
return err
if klog.V(2).Enabled() {
bytes, err := runtime.Encode(encoder, cfg)
if err != nil {
return err
}
configString := string(bytes)
klog.Infof("Using component config:\n%+v\n", configString)
}
if len(fileName) > 0 {
configFile, err := os.Create(fileName)
if err != nil {
return err
}
defer configFile.Close()
if err := encoder.Encode(cfg, configFile); err != nil {
return err
}
klog.Infof("Wrote configuration to: %s\n", fileName)
os.Exit(0)
}
return nil
}

16
cmd/kube-scheduler/app/server.go
View File

@ -128,14 +128,6 @@ func runCommand(cmd *cobra.Command, opts *options.Options, registryOptions ...Op
return err
}
if len(opts.WriteConfigTo) > 0 {
if err := options.WriteConfigFile(opts.WriteConfigTo, &cc.ComponentConfig); err != nil {
return err
}
klog.Infof("Wrote configuration to: %s\n", opts.WriteConfigTo)
return nil
}
return Run(ctx, cc, sched)
}
@ -310,6 +302,7 @@ func Setup(ctx context.Context, opts *options.Options, outOfTreeRegistryOptions
}
recorderFactory := getRecorderFactory(&cc)
completedProfiles := make([]kubeschedulerconfig.KubeSchedulerProfile, 0)
// Create the scheduler.
sched, err := scheduler.New(cc.Client,
cc.InformerFactory,
@ -323,10 +316,17 @@ func Setup(ctx context.Context, opts *options.Options, outOfTreeRegistryOptions
scheduler.WithPodInitialBackoffSeconds(cc.ComponentConfig.PodInitialBackoffSeconds),
scheduler.WithExtenders(cc.ComponentConfig.Extenders...),
scheduler.WithParallelism(cc.ComponentConfig.Parallelism),
scheduler.WithBuildFrameworkCapturer(func(profile kubeschedulerconfig.KubeSchedulerProfile) {
// Profiles are processed during Framework instantiation to set default plugins and configurations. Capturing them for logging
completedProfiles = append(completedProfiles, profile)
}),
)
if err != nil {
return nil, nil, err
}
if err := options.LogOrWriteConfig(opts.WriteConfigTo, &cc.ComponentConfig, completedProfiles); err != nil {
return nil, nil, err
}
return &cc, sched, nil
}

1
pkg/scheduler/BUILD
View File

@ -65,6 +65,7 @@ go_test(
"//pkg/scheduler/framework:go_default_library",
"//pkg/scheduler/framework/plugins:go_default_library",
"//pkg/scheduler/framework/plugins/defaultbinder:go_default_library",
"//pkg/scheduler/framework/plugins/defaultpreemption:go_default_library",
"//pkg/scheduler/framework/plugins/interpodaffinity:go_default_library",
"//pkg/scheduler/framework/plugins/nodeaffinity:go_default_library",
"//pkg/scheduler/framework/plugins/nodelabel:go_default_library",

22
pkg/scheduler/factory_test.go
View File

@ -38,6 +38,7 @@ import (
schedulerapi "k8s.io/kubernetes/pkg/scheduler/apis/config"
"k8s.io/kubernetes/pkg/scheduler/framework"
frameworkplugins "k8s.io/kubernetes/pkg/scheduler/framework/plugins"
"k8s.io/kubernetes/pkg/scheduler/framework/plugins/defaultpreemption"
"k8s.io/kubernetes/pkg/scheduler/framework/plugins/interpodaffinity"
"k8s.io/kubernetes/pkg/scheduler/framework/plugins/nodeaffinity"
"k8s.io/kubernetes/pkg/scheduler/framework/plugins/nodelabel"
@ -107,6 +108,13 @@ func TestCreateFromConfig(t *testing.T) {
"apiVersion" : "v1"
}`),
wantPluginConfig: []schedulerapi.PluginConfig{
{
Name: defaultpreemption.Name,
Args: &schedulerapi.DefaultPreemptionArgs{
MinCandidateNodesPercentage: 10,
MinCandidateNodesAbsolute: 100,
},
},
{
Name: interpodaffinity.Name,
Args: &schedulerapi.InterPodAffinityArgs{
@ -231,6 +239,13 @@ func TestCreateFromConfig(t *testing.T) {
]
}`),
wantPluginConfig: []schedulerapi.PluginConfig{
{
Name: defaultpreemption.Name,
Args: &schedulerapi.DefaultPreemptionArgs{
MinCandidateNodesPercentage: 10,
MinCandidateNodesAbsolute: 100,
},
},
{
Name: interpodaffinity.Name,
Args: &schedulerapi.InterPodAffinityArgs{
@ -312,6 +327,13 @@ func TestCreateFromConfig(t *testing.T) {
"hardPodAffinitySymmetricWeight" : 10
}`),
wantPluginConfig: []schedulerapi.PluginConfig{
{
Name: defaultpreemption.Name,
Args: &schedulerapi.DefaultPreemptionArgs{
MinCandidateNodesPercentage: 10,
MinCandidateNodesAbsolute: 100,
},
},
{
Name: interpodaffinity.Name,
Args: &schedulerapi.InterPodAffinityArgs{