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install_linux.go
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install_linux.go
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// Copyright 2018 The etcd 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.
//go:build linux
// +build linux
package main
import (
"fmt"
"io/ioutil"
"net/http"
"os/exec"
"path/filepath"
"go.etcd.io/etcd/client/pkg/v3/fileutil"
)
const downloadURL = `https://storage.googleapis.com/etcd/%s/etcd-%s-linux-amd64.tar.gz`
func install(ver, dir string) (string, error) {
ep := fmt.Sprintf(downloadURL, ver, ver)
resp, err := http.Get(ep)
if err != nil {
return "", err
}
defer resp.Body.Close()
d, err := ioutil.ReadAll(resp.Body)
if err != nil {
return "", err
}
tarPath := filepath.Join(dir, "etcd.tar.gz")
if err = ioutil.WriteFile(tarPath, d, fileutil.PrivateFileMode); err != nil {
return "", err
}
// parametrizes to prevent attackers from adding arbitrary OS commands
if err = exec.Command("tar", "xzvf", tarPath, "-C", dir, "--strip-components=1").Run(); err != nil {
return "", err
}
return filepath.Join(dir, "etcd"), nil
}