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