109 lines
2.4 KiB
Go
109 lines
2.4 KiB
Go
// Copyright 2018 The etcd Authors
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package agent
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import (
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"io"
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"net"
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"net/url"
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"os"
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"os/exec"
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"path/filepath"
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"strconv"
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"time"
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"go.etcd.io/etcd/pkg/v3/fileutil"
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)
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// TODO: support separate WAL directory
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func archive(baseDir, etcdLogPath, dataDir string) error {
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dir := filepath.Join(baseDir, "etcd-failure-archive", time.Now().Format(time.RFC3339))
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if existDir(dir) {
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dir = filepath.Join(baseDir, "etcd-failure-archive", time.Now().Add(time.Second).Format(time.RFC3339))
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}
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if err := fileutil.TouchDirAll(dir); err != nil {
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return err
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}
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dst := filepath.Join(dir, "etcd.log")
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if err := copyFile(etcdLogPath, dst); err != nil {
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if !os.IsNotExist(err) {
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return err
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}
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}
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if err := os.Rename(dataDir, filepath.Join(dir, filepath.Base(dataDir))); err != nil {
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if !os.IsNotExist(err) {
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return err
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}
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}
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return nil
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}
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func existDir(fpath string) bool {
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st, err := os.Stat(fpath)
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if err != nil {
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if os.IsNotExist(err) {
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return false
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}
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} else {
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return st.IsDir()
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}
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return false
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}
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func getURLAndPort(addr string) (urlAddr *url.URL, port int, err error) {
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urlAddr, err = url.Parse(addr)
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if err != nil {
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return nil, -1, err
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}
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var s string
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_, s, err = net.SplitHostPort(urlAddr.Host)
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if err != nil {
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return nil, -1, err
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}
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port, err = strconv.Atoi(s)
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if err != nil {
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return nil, -1, err
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}
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return urlAddr, port, err
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}
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func copyFile(src, dst string) error {
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f, err := os.Open(src)
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if err != nil {
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return err
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}
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defer f.Close()
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w, err := os.Create(dst)
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if err != nil {
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return err
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}
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defer w.Close()
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if _, err = io.Copy(w, f); err != nil {
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return err
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}
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return w.Sync()
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}
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func cleanPageCache() error {
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// https://www.kernel.org/doc/Documentation/sysctl/vm.txt
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// https://github.com/torvalds/linux/blob/master/fs/drop_caches.c
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cmd := exec.Command("/bin/sh", "-c", `echo "echo 1 > /proc/sys/vm/drop_caches" | sudo sh`)
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return cmd.Run()
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}
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