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Encapsulate sysctl test and log

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This commit is contained in:
Tim Hockin
2020-04-10 08:47:03 -07:00
parent 341022f8d1
commit b874f7c626
4 changed files with 31 additions and 45 deletions
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1
pkg/proxy/util/BUILD
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@@ -12,6 +12,7 @@ go_library(
visibility = ["//visibility:public"],
deps = [
"//pkg/apis/core/v1/helper:go_default_library",
"//pkg/util/sysctl:go_default_library",
"//staging/src/k8s.io/api/core/v1:go_default_library",
"//staging/src/k8s.io/apimachinery/pkg/types:go_default_library",
"//staging/src/k8s.io/apimachinery/pkg/util/rand:go_default_library",

12
pkg/proxy/util/utils.go
View File

@@ -29,6 +29,7 @@ import (
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/client-go/tools/record"
helper "k8s.io/kubernetes/pkg/apis/core/v1/helper"
utilsysctl "k8s.io/kubernetes/pkg/util/sysctl"
utilnet "k8s.io/utils/net"
"k8s.io/klog"
@@ -288,3 +289,14 @@ func ShuffleStrings(s []string) []string {
}
return shuffled
}
// EnsureSysctl sets a kernel sysctl to a given numeric value.
func EnsureSysctl(sysctl utilsysctl.Interface, name string, newVal int) error {
if oldVal, _ := sysctl.GetSysctl(name); oldVal != newVal {
if err := sysctl.SetSysctl(name, newVal); err != nil {
return fmt.Errorf("can't set sysctl %s to %d: %v", name, newVal, err)
}
klog.V(1).Infof("Changed sysctl %q: %d -> %d", name, oldVal, newVal)
}
return nil
}