147 lines
3.8 KiB
Go
147 lines
3.8 KiB
Go
// Copyright 2015 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 command
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import (
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"context"
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"encoding/hex"
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"fmt"
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"io/ioutil"
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"net/http"
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"regexp"
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"strconv"
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"strings"
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"time"
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v3 "go.etcd.io/etcd/clientv3"
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pb "go.etcd.io/etcd/mvcc/mvccpb"
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"github.com/spf13/cobra"
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)
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func printKV(isHex bool, valueOnly bool, kv *pb.KeyValue) {
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k, v := string(kv.Key), string(kv.Value)
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if isHex {
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k = addHexPrefix(hex.EncodeToString(kv.Key))
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v = addHexPrefix(hex.EncodeToString(kv.Value))
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}
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if !valueOnly {
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fmt.Println(k)
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}
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fmt.Println(v)
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}
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func addHexPrefix(s string) string {
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ns := make([]byte, len(s)*2)
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for i := 0; i < len(s); i += 2 {
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ns[i*2] = '\\'
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ns[i*2+1] = 'x'
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ns[i*2+2] = s[i]
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ns[i*2+3] = s[i+1]
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}
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return string(ns)
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}
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func argify(s string) []string {
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r := regexp.MustCompile(`"(?:[^"\\]|\\.)*"|'[^']*'|[^'"\s]\S*[^'"\s]?`)
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args := r.FindAllString(s, -1)
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for i := range args {
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if len(args[i]) == 0 {
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continue
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}
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if args[i][0] == '\'' {
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// 'single-quoted string'
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args[i] = args[i][1 : len(args)-1]
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} else if args[i][0] == '"' {
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// "double quoted string"
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if _, err := fmt.Sscanf(args[i], "%q", &args[i]); err != nil {
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ExitWithError(ExitInvalidInput, err)
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}
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}
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}
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return args
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}
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func commandCtx(cmd *cobra.Command) (context.Context, context.CancelFunc) {
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timeOut, err := cmd.Flags().GetDuration("command-timeout")
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if err != nil {
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ExitWithError(ExitError, err)
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}
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return context.WithTimeout(context.Background(), timeOut)
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}
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// get the process_resident_memory_bytes from <server:2379>/metrics
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func endpointMemoryMetrics(host string) float64 {
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residentMemoryKey := "process_resident_memory_bytes"
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var residentMemoryValue string
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if !strings.HasPrefix(host, `http://`) {
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host = "http://" + host
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}
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url := host + "/metrics"
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resp, err := http.Get(url)
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if err != nil {
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fmt.Println(fmt.Sprintf("fetch error: %v", err))
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return 0.0
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}
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byts, readerr := ioutil.ReadAll(resp.Body)
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resp.Body.Close()
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if readerr != nil {
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fmt.Println(fmt.Sprintf("fetch error: reading %s: %v", url, readerr))
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return 0.0
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}
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for _, line := range strings.Split(string(byts), "\n") {
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if strings.HasPrefix(line, residentMemoryKey) {
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residentMemoryValue = strings.TrimSpace(strings.TrimPrefix(line, residentMemoryKey))
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break
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}
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}
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if residentMemoryValue == "" {
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fmt.Println(fmt.Sprintf("could not find: %v", residentMemoryKey))
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return 0.0
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}
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residentMemoryBytes, parseErr := strconv.ParseFloat(residentMemoryValue, 64)
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if parseErr != nil {
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fmt.Println(fmt.Sprintf("parse error: %v", parseErr))
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return 0.0
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}
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return residentMemoryBytes
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}
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// compact keyspace history to a provided revision
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func compact(c *v3.Client, rev int64) {
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fmt.Printf("Compacting with revision %d\n", rev)
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ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
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_, err := c.Compact(ctx, rev, v3.WithCompactPhysical())
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cancel()
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if err != nil {
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ExitWithError(ExitError, err)
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}
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fmt.Printf("Compacted with revision %d\n", rev)
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}
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// defrag a given endpoint
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func defrag(c *v3.Client, ep string) {
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fmt.Printf("Defragmenting %q\n", ep)
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ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
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_, err := c.Defragment(ctx, ep)
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cancel()
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if err != nil {
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ExitWithError(ExitError, err)
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}
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fmt.Printf("Defragmented %q\n", ep)
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}
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