123 lines
3.2 KiB
Go
123 lines
3.2 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors All rights reserved.
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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 util is a hodge-podge of utility functions that should be moved elsewhere.
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package util
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import (
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"fmt"
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"io"
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"io/ioutil"
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"net"
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"os"
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"os/exec"
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"path/filepath"
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"runtime"
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"strconv"
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"github.com/pkg/errors"
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"github.com/spf13/viper"
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"k8s.io/minikube/pkg/minikube/config"
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"k8s.io/minikube/pkg/minikube/constants"
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)
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type ServiceContext struct {
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Service string `json:"service"`
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Version string `json:"version"`
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}
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type LookPath func(filename string) (string, error)
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var lookPath LookPath
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func init() {
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lookPath = exec.LookPath
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}
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func MaybePrintKubectlDownloadMsg(goos string, out io.Writer) {
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if !viper.GetBool(config.WantKubectlDownloadMsg) {
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return
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}
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verb := "run"
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installInstructions := "curl -Lo kubectl https://storage.googleapis.com/kubernetes-release/release/%s/bin/%s/%s/kubectl && chmod +x kubectl && sudo cp kubectl /usr/local/bin/ && rm kubectl"
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if goos == "windows" {
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verb = "do"
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installInstructions = `download kubectl from:
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https://storage.googleapis.com/kubernetes-release/release/%s/bin/%s/%s/kubectl.exe
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Add kubectl to your system PATH`
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}
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_, err := lookPath("kubectl")
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if err != nil && goos == "windows" {
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_, err = lookPath("kubectl.exe")
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}
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if err != nil {
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fmt.Fprintf(out,
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`========================================
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kubectl could not be found on your path. kubectl is a requirement for using minikube
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To install kubectl, please %s the following:
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%s
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To disable this message, run the following:
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minikube config set WantKubectlDownloadMsg false
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========================================
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`,
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verb, fmt.Sprintf(installInstructions, constants.DefaultKubernetesVersion, goos, runtime.GOARCH))
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}
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}
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// Ask the kernel for a free open port that is ready to use
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func GetPort() (string, error) {
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addr, err := net.ResolveTCPAddr("tcp", "localhost:0")
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if err != nil {
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panic(err)
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}
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l, err := net.ListenTCP("tcp", addr)
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if err != nil {
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return "", errors.Errorf("Error accessing port %d", addr.Port)
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}
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defer l.Close()
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return strconv.Itoa(l.Addr().(*net.TCPAddr).Port), nil
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}
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func KillMountProcess() error {
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out, err := ioutil.ReadFile(filepath.Join(constants.GetMinipath(), constants.MountProcessFileName))
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if err != nil {
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return nil // no mount process to kill
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}
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pid, err := strconv.Atoi(string(out))
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if err != nil {
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return errors.Wrap(err, "error converting mount string to pid")
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}
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mountProc, err := os.FindProcess(pid)
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if err != nil {
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return errors.Wrap(err, "error converting mount string to pid")
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}
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return mountProc.Kill()
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}
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func GetKubeConfigPath() string {
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kubeConfigEnv := os.Getenv(constants.KubeconfigEnvVar)
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if kubeConfigEnv == "" {
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return constants.KubeconfigPath
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}
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return filepath.SplitList(kubeConfigEnv)[0]
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}
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