37 lines
1.1 KiB
Go
37 lines
1.1 KiB
Go
|
/*
|
||
|
|
Copyright 2016 The Kubernetes Authors.
|
||
|
|
|
||
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
you may not use this file except in compliance with the License.
|
||
|
|
You may obtain a copy of the License at
|
||
|
|
|
||
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
|
||
|
|
Unless required by applicable law or agreed to in writing, software
|
||
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
See the License for the specific language governing permissions and
|
||
|
|
limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
package system
|
||
|
|
|
||
|
|
import (
|
||
|
|
"strings"
|
||
|
|
)
|
||
|
|
|
||
|
|
// TODO: find a better way of figuring out if given node is a registered master.
|
||
|
|
func IsMasterNode(nodeName string) bool {
|
||
|
|
// We are trying to capture "master(-...)?$" regexp.
|
||
|
|
// However, using regexp.MatchString() results even in more than 35%
|
||
|
|
// of all space allocations in ControllerManager spent in this function.
|
||
|
|
// That's why we are trying to be a bit smarter.
|
||
|
|
if strings.HasSuffix(nodeName, "master") {
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
if len(nodeName) >= 10 {
|
||
|
|
return strings.HasSuffix(nodeName[:len(nodeName)-3], "master-")
|
||
|
|
}
|
||
|
|
return false
|
||
|
|
}
|