| /* |
| 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 |
| } |
