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// Copyright 2015 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.
package command
import (
"context"
"crypto/tls"
"encoding/hex"
"fmt"
"io/ioutil"
"net/http"
"regexp"
"strconv"
"strings"
"time"
pb "go.etcd.io/etcd/api/v3/mvccpb"
v3 "go.etcd.io/etcd/client/v3"
"go.etcd.io/etcd/pkg/v3/cobrautl"
"github.com/spf13/cobra"
)
func printKV(isHex bool, valueOnly bool, kv *pb.KeyValue) {
k, v := string(kv.Key), string(kv.Value)
if isHex {
k = addHexPrefix(hex.EncodeToString(kv.Key))
v = addHexPrefix(hex.EncodeToString(kv.Value))
}
if !valueOnly {
fmt.Println(k)
}
fmt.Println(v)
}
func addHexPrefix(s string) string {
ns := make([]byte, len(s)*2)
for i := 0; i < len(s); i += 2 {
ns[i*2] = '\\'
ns[i*2+1] = 'x'
ns[i*2+2] = s[i]
ns[i*2+3] = s[i+1]
}
return string(ns)
}
func argify(s string) []string {
r := regexp.MustCompile(`"(?:[^"\\]|\\.)*"|'[^']*'|[^'"\s]\S*[^'"\s]?`)
args := r.FindAllString(s, -1)
for i := range args {
if len(args[i]) == 0 {
continue
}
if args[i][0] == '\'' {
// 'single-quoted string'
args[i] = args[i][1 : len(args)-1]
} else if args[i][0] == '"' {
// "double quoted string"
if _, err := fmt.Sscanf(args[i], "%q", &args[i]); err != nil {
cobrautl.ExitWithError(cobrautl.ExitInvalidInput, err)
}
}
}
return args
}
func commandCtx(cmd *cobra.Command) (context.Context, context.CancelFunc) {
timeOut, err := cmd.Flags().GetDuration("command-timeout")
if err != nil {
cobrautl.ExitWithError(cobrautl.ExitError, err)
}
return context.WithTimeout(context.Background(), timeOut)
}
func isCommandTimeoutFlagSet(cmd *cobra.Command) bool {
commandTimeoutFlag := cmd.Flags().Lookup("command-timeout")
if commandTimeoutFlag == nil {
panic("expect command-timeout flag to exist")
}
return commandTimeoutFlag.Changed
}
// get the process_resident_memory_bytes from <server>/metrics
func endpointMemoryMetrics(host string, scfg *secureCfg) float64 {
residentMemoryKey := "process_resident_memory_bytes"
var residentMemoryValue string
if !strings.HasPrefix(host, "http://") && !strings.HasPrefix(host, "https://") {
host = "http://" + host
}
url := host + "/metrics"
if strings.HasPrefix(host, "https://") {
// load client certificate
cert, err := tls.LoadX509KeyPair(scfg.cert, scfg.key)
if err != nil {
fmt.Println(fmt.Sprintf("client certificate error: %v", err))
return 0.0
}
http.DefaultTransport.(*http.Transport).TLSClientConfig = &tls.Config{
Certificates: []tls.Certificate{cert},
InsecureSkipVerify: scfg.insecureSkipVerify,
}
}
resp, err := http.Get(url)
if err != nil {
fmt.Println(fmt.Sprintf("fetch error: %v", err))
return 0.0
}
byts, readerr := ioutil.ReadAll(resp.Body)
resp.Body.Close()
if readerr != nil {
fmt.Println(fmt.Sprintf("fetch error: reading %s: %v", url, readerr))
return 0.0
}
for _, line := range strings.Split(string(byts), "\n") {
if strings.HasPrefix(line, residentMemoryKey) {
residentMemoryValue = strings.TrimSpace(strings.TrimPrefix(line, residentMemoryKey))
break
}
}
if residentMemoryValue == "" {
fmt.Println(fmt.Sprintf("could not find: %v", residentMemoryKey))
return 0.0
}
residentMemoryBytes, parseErr := strconv.ParseFloat(residentMemoryValue, 64)
if parseErr != nil {
fmt.Println(fmt.Sprintf("parse error: %v", parseErr))
return 0.0
}
return residentMemoryBytes
}
// compact keyspace history to a provided revision
func compact(c *v3.Client, rev int64) {
fmt.Printf("Compacting with revision %d\n", rev)
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
_, err := c.Compact(ctx, rev, v3.WithCompactPhysical())
cancel()
if err != nil {
cobrautl.ExitWithError(cobrautl.ExitError, err)
}
fmt.Printf("Compacted with revision %d\n", rev)
}
// defrag a given endpoint
func defrag(c *v3.Client, ep string) {
fmt.Printf("Defragmenting %q\n", ep)
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
_, err := c.Defragment(ctx, ep)
cancel()
if err != nil {
cobrautl.ExitWithError(cobrautl.ExitError, err)
}
fmt.Printf("Defragmented %q\n", ep)
}
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