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add envar to disable non semantic updates feature

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enabled by default. can easily be changed in backports
This commit is contained in:
Alexander Zielenski 2022-07-14 11:28:10 -07:00
parent 40343793f7
commit 076051135d
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1 changed files with 24 additions and 0 deletions
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24
staging/src/k8s.io/apiserver/pkg/endpoints/handlers/fieldmanager/equality.go
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@ -19,7 +19,9 @@ package fieldmanager
import (
"context"
"fmt"
"os"
"reflect"
"strconv"
"time"
"k8s.io/apimachinery/pkg/api/equality"
@ -28,6 +30,24 @@ import (
"k8s.io/apimachinery/pkg/conversion"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apiserver/pkg/endpoints/metrics"
"k8s.io/klog/v2"
)
func determineIgnoreNonSemanticUpdatesEnabled() bool {
if ignoreNonSemanticUpdatesString, exists := os.LookupEnv("KUBE_APISERVER_IGNORE_NON_SEMANTIC_UPDATES"); exists {
if ret, err := strconv.ParseBool(ignoreNonSemanticUpdatesString); err == nil {
return ret
} else {
klog.Errorf("failed to parse envar KUBE_APISERVER_IGNORE_NON_SEMANTIC_UPDATES: %v", err)
}
}
// enabled by default
return true
}
var (
ignoreNonSemanticUpdatesEnabled = determineIgnoreNonSemanticUpdatesEnabled()
)
var ignoreTimestampEqualities = func() conversion.Equalities {
@ -57,6 +77,10 @@ func IgnoreManagedFieldsTimestampsTransformer(
newObj runtime.Object,
oldObj runtime.Object,
) (res runtime.Object, err error) {
if !ignoreNonSemanticUpdatesEnabled {
return newObj, nil
}
outcome := "unequal_objects_fast"
start := time.Now()
err = nil