| /* |
| Copyright 2018 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 kubelet |
| |
| import ( |
| "fmt" |
| |
| "k8s.io/kubernetes/pkg/util/initsystem" |
| ) |
| |
| // TryStartKubelet attempts to bring up kubelet service |
| func TryStartKubelet() { |
| // If we notice that the kubelet service is inactive, try to start it |
| initSystem, err := initsystem.GetInitSystem() |
| if err != nil { |
| fmt.Println("[kubelet-start] no supported init system detected, won't make sure the kubelet is running properly.") |
| return |
| } |
| |
| if !initSystem.ServiceExists("kubelet") { |
| fmt.Println("[kubelet-start] couldn't detect a kubelet service, can't make sure the kubelet is running properly.") |
| } |
| |
| fmt.Println("[kubelet-start] Activating the kubelet service") |
| // This runs "systemctl daemon-reload && systemctl restart kubelet" |
| if err := initSystem.ServiceRestart("kubelet"); err != nil { |
| fmt.Printf("[kubelet-start] WARNING: unable to start the kubelet service: [%v]\n", err) |
| fmt.Printf("[kubelet-start] please ensure kubelet is reloaded and running manually.\n") |
| } |
| } |
| |
| // TryStopKubelet attempts to bring down the kubelet service momentarily |
| func TryStopKubelet() { |
| // If we notice that the kubelet service is inactive, try to start it |
| initSystem, err := initsystem.GetInitSystem() |
| if err != nil { |
| fmt.Println("[kubelet-start] no supported init system detected, won't make sure the kubelet not running for a short period of time while setting up configuration for it.") |
| return |
| } |
| |
| if !initSystem.ServiceExists("kubelet") { |
| fmt.Println("[kubelet-start] couldn't detect a kubelet service, can't make sure the kubelet not running for a short period of time while setting up configuration for it.") |
| } |
| |
| // This runs "systemctl daemon-reload && systemctl stop kubelet" |
| if err := initSystem.ServiceStop("kubelet"); err != nil { |
| fmt.Printf("[kubelet-start] WARNING: unable to stop the kubelet service momentarily: [%v]\n", err) |
| } |
| } |