105 lines
2.9 KiB
Go
105 lines
2.9 KiB
Go
/*
|
|
Copyright 2016 The Kubernetes Authors All rights reserved.
|
|
|
|
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 util is a hodge-podge of utility functions that should be moved elsewhere.
|
|
package util
|
|
|
|
import (
|
|
"fmt"
|
|
"io/ioutil"
|
|
"net"
|
|
"os"
|
|
"path/filepath"
|
|
"strconv"
|
|
|
|
"github.com/golang/glog"
|
|
ps "github.com/mitchellh/go-ps"
|
|
"github.com/pkg/errors"
|
|
"k8s.io/minikube/pkg/minikube/constants"
|
|
)
|
|
|
|
// GetPort asks the kernel for a free open port that is ready to use
|
|
func GetPort() (int, error) {
|
|
addr, err := net.ResolveTCPAddr("tcp", "localhost:0")
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
l, err := net.ListenTCP("tcp", addr)
|
|
if err != nil {
|
|
return -1, errors.Errorf("Error accessing port %d", addr.Port)
|
|
}
|
|
defer l.Close()
|
|
return l.Addr().(*net.TCPAddr).Port, nil
|
|
}
|
|
|
|
// KillMountProcess kills the mount process, if it is running
|
|
func KillMountProcess() error {
|
|
pidPath := filepath.Join(constants.GetMinipath(), constants.MountProcessFileName)
|
|
if _, err := os.Stat(pidPath); os.IsNotExist(err) {
|
|
return nil
|
|
}
|
|
|
|
glog.Infof("Found %s ...", pidPath)
|
|
out, err := ioutil.ReadFile(pidPath)
|
|
if err != nil {
|
|
return errors.Wrap(err, "ReadFile")
|
|
}
|
|
glog.Infof("pidfile contents: %s", out)
|
|
pid, err := strconv.Atoi(string(out))
|
|
if err != nil {
|
|
return errors.Wrap(err, "error parsing pid")
|
|
}
|
|
// os.FindProcess does not check if pid is running :(
|
|
entry, err := ps.FindProcess(pid)
|
|
if err != nil {
|
|
return errors.Wrap(err, "ps.FindProcess")
|
|
}
|
|
if entry == nil {
|
|
glog.Infof("Stale pid: %d", pid)
|
|
if err := os.Remove(pidPath); err != nil {
|
|
return errors.Wrap(err, "Removing stale pid")
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// We found a process, but it still may not be ours.
|
|
glog.Infof("Found process %d: %s", pid, entry.Executable())
|
|
proc, err := os.FindProcess(pid)
|
|
if err != nil {
|
|
return errors.Wrap(err, "os.FindProcess")
|
|
}
|
|
|
|
glog.Infof("Killing pid %d ...", pid)
|
|
if err := proc.Kill(); err != nil {
|
|
glog.Infof("Kill failed with %v - removing probably stale pid...", err)
|
|
if err := os.Remove(pidPath); err != nil {
|
|
return errors.Wrap(err, "Removing likely stale unkillable pid")
|
|
}
|
|
return errors.Wrap(err, fmt.Sprintf("Kill(%d/%s)", pid, entry.Executable()))
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// GetKubeConfigPath gets the path to the first kubeconfig
|
|
func GetKubeConfigPath() string {
|
|
kubeConfigEnv := os.Getenv(constants.KubeconfigEnvVar)
|
|
if kubeConfigEnv == "" {
|
|
return constants.KubeconfigPath
|
|
}
|
|
return filepath.SplitList(kubeConfigEnv)[0]
|
|
}
|