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vendor: add missing failpoint

Browse Source 
Signed-off-by: Gyuho Lee <leegyuho@amazon.com>
This commit is contained in:
Gyuho Lee 2020-06-07 22:25:55 -07:00
parent 49f91d629a
commit 6e6f22db43
10 changed files with 893 additions and 1 deletions
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2
functional/cmd/etcd-tester/main.go
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@ -18,8 +18,8 @@ package main
import (
"flag"
_ "github.com/etcd-io/gofail/runtime"
"go.etcd.io/etcd/v3/functional/tester"
"go.uber.org/zap"
)

1
go.mod
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@ -10,6 +10,7 @@ require (
github.com/creack/pty v1.1.7
github.com/dgrijalva/jwt-go v3.2.0+incompatible
github.com/dustin/go-humanize v0.0.0-20171111073723-bb3d318650d4
github.com/etcd-io/gofail v0.0.0-20190801230047-ad7f989257ca
github.com/fatih/color v1.7.0 // indirect
github.com/gogo/protobuf v1.2.1
github.com/golang/groupcache v0.0.0-20160516000752-02826c3e7903

2
go.sum
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@ -28,6 +28,8 @@ github.com/dustin/go-humanize v0.0.0-20171111073723-bb3d318650d4 h1:qk/FSDDxo05w
github.com/dustin/go-humanize v0.0.0-20171111073723-bb3d318650d4/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
github.com/etcd-io/gofail v0.0.0-20190801230047-ad7f989257ca h1:Y2I0lxOttdUKz+hNaIdG3FtjuQrTmwXun1opRV65IZc=
github.com/etcd-io/gofail v0.0.0-20190801230047-ad7f989257ca/go.mod h1:49H/RkXP8pKaZy4h0d+NW16rSLhyVBt4o6VLJbmOqDE=
github.com/fatih/color v1.7.0 h1:DkWD4oS2D8LGGgTQ6IvwJJXSL5Vp2ffcQg58nFV38Ys=
github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=

202
vendor/github.com/etcd-io/gofail/LICENSE generated vendored Normal file
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@ -0,0 +1,202 @@
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5
vendor/github.com/etcd-io/gofail/NOTICE generated vendored Normal file
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@ -0,0 +1,5 @@
CoreOS Project
Copyright 2018 CoreOS, Inc
This product includes software developed at CoreOS, Inc.
(http://www.coreos.com/).

83
vendor/github.com/etcd-io/gofail/runtime/failpoint.go generated vendored Normal file
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@ -0,0 +1,83 @@
// Copyright 2016 CoreOS, Inc.
//
// 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 runtime
import (
"context"
"fmt"
"sync"
)
type Failpoint struct {
cmu sync.RWMutex
ctx context.Context
cancel context.CancelFunc
donec chan struct{}
released bool
mu sync.RWMutex
t *terms
}
func NewFailpoint(pkg, name string, goFailGo bool) *Failpoint {
fp := &Failpoint{}
if goFailGo {
fp.ctx, fp.cancel = context.WithCancel(context.Background())
fp.donec = make(chan struct{})
}
register(pkg+"/"+name, fp)
return fp
}
// Acquire gets evalutes the failpoint terms; if the failpoint
// is active, it will return a value. Otherwise, returns a non-nil error.
func (fp *Failpoint) Acquire() (interface{}, error) {
fp.mu.RLock()
if fp.t == nil {
fp.mu.RUnlock()
return nil, ErrDisabled
}
v, err := fp.t.eval()
if v == nil {
err = ErrDisabled
}
if err != nil {
fp.mu.RUnlock()
}
return v, err
}
// Release is called when the failpoint exists.
func (fp *Failpoint) Release() {
fp.cmu.RLock()
ctx := fp.ctx
donec := fp.donec
fp.cmu.RUnlock()
if ctx != nil && !fp.released {
<-ctx.Done()
select {
case <-donec:
default:
close(donec)
}
}
fp.mu.RUnlock()
}
// BadType is called when the failpoint evaluates to the wrong type.
func (fp *Failpoint) BadType(v interface{}, t string) {
fmt.Printf("failpoint: %q got value %v of type \"%T\" but expected type %q\n", fp.t.fpath, v, v, t)
}

95
vendor/github.com/etcd-io/gofail/runtime/http.go generated vendored Normal file
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@ -0,0 +1,95 @@
// Copyright 2016 CoreOS, Inc.
//
// 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 runtime
import (
"io/ioutil"
"net"
"net/http"
"sort"
"strings"
)
type httpHandler struct{}
func serve(host string) error {
ln, err := net.Listen("tcp", host)
if err != nil {
return err
}
go http.Serve(ln, &httpHandler{})
return nil
}
func (*httpHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
key := r.RequestURI
if len(key) == 0 || key[0] != '/' {
http.Error(w, "malformed request URI", http.StatusBadRequest)
return
}
key = key[1:]
switch {
// sets the failpoint
case r.Method == "PUT":
v, err := ioutil.ReadAll(r.Body)
if err != nil {
http.Error(w, "failed ReadAll in PUT", http.StatusBadRequest)
return
}
unlock, eerr := enableAndLock(key, string(v))
if eerr != nil {
http.Error(w, "failed to set failpoint "+string(key), http.StatusBadRequest)
return
}
w.WriteHeader(http.StatusNoContent)
if f, ok := w.(http.Flusher); ok {
// flush before unlocking so a panic failpoint won't
// take down the http server before it sends the response
f.Flush()
}
unlock()
// gets status of the failpoint
case r.Method == "GET":
if len(key) == 0 {
fps := List()
sort.Strings(fps)
lines := make([]string, len(fps))
for i := range lines {
s, _ := Status(fps[i])
lines[i] = fps[i] + "=" + s
}
w.Write([]byte(strings.Join(lines, "\n") + "\n"))
} else {
status, err := Status(key)
if err != nil {
http.Error(w, "failed to GET: "+err.Error(), http.StatusNotFound)
}
w.Write([]byte(status + "\n"))
}
// deactivates a failpoint
case r.Method == "DELETE":
if err := Disable(key); err != nil {
http.Error(w, "failed to delete failpoint "+err.Error(), http.StatusBadRequest)
return
}
w.WriteHeader(http.StatusNoContent)
default:
w.Header().Add("Allow", "DELETE")
w.Header().Add("Allow", "GET")
w.Header().Set("Allow", "PUT")
http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
}
}

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vendor/github.com/etcd-io/gofail/runtime/runtime.go generated vendored Normal file
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@ -0,0 +1,151 @@
// Copyright 2016 CoreOS, Inc.
//
// 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 runtime
import (
"context"
"fmt"
"os"
"strings"
"sync"
)
var (
ErrNoExist = fmt.Errorf("failpoint: failpoint does not exist")
ErrDisabled = fmt.Errorf("failpoint: failpoint is disabled")
failpoints map[string]*Failpoint
failpointsMu sync.RWMutex
envTerms map[string]string
)
func init() {
failpoints = make(map[string]*Failpoint)
envTerms = make(map[string]string)
if s := os.Getenv("GOFAIL_FAILPOINTS"); len(s) > 0 {
// format is <FAILPOINT>=<TERMS>[;<FAILPOINT>=<TERMS>;...]
for _, fp := range strings.Split(s, ";") {
fp_term := strings.Split(fp, "=")
if len(fp_term) != 2 {
fmt.Printf("bad failpoint %q\n", fp)
os.Exit(1)
}
envTerms[fp_term[0]] = fp_term[1]
}
}
if s := os.Getenv("GOFAIL_HTTP"); len(s) > 0 {
if err := serve(s); err != nil {
fmt.Println(err)
os.Exit(1)
}
}
}
// Enable sets a failpoint to a given failpoint description.
func Enable(failpath, inTerms string) error {
unlock, err := enableAndLock(failpath, inTerms)
if unlock != nil {
unlock()
}
return err
}
// enableAndLock enables a failpoint and returns a function to unlock it
func enableAndLock(failpath, inTerms string) (func(), error) {
t, err := newTerms(failpath, inTerms)
if err != nil {
fmt.Printf("failed to enable \"%s=%s\" (%v)\n", failpath, inTerms, err)
return nil, err
}
failpointsMu.RLock()
fp := failpoints[failpath]
failpointsMu.RUnlock()
if fp == nil {
return nil, ErrNoExist
}
fp.mu.Lock()
fp.t = t
fp.released = false
return func() { fp.mu.Unlock() }, nil
}
// Disable stops a failpoint from firing.
func Disable(failpath string) error {
failpointsMu.RLock()
fp := failpoints[failpath]
failpointsMu.RUnlock()
if fp == nil {
return ErrNoExist
}
fp.cmu.RLock()
cancel := fp.cancel
donec := fp.donec
fp.cmu.RUnlock()
if cancel != nil && donec != nil {
cancel()
<-donec
fp.cmu.Lock()
fp.ctx, fp.cancel = context.WithCancel(context.Background())
fp.donec = make(chan struct{})
fp.released = true
fp.cmu.Unlock()
}
fp.mu.Lock()
defer fp.mu.Unlock()
if fp.t == nil {
return ErrDisabled
}
fp.t = nil
return nil
}
// Status gives the current setting for the failpoint
func Status(failpath string) (string, error) {
failpointsMu.RLock()
fp := failpoints[failpath]
failpointsMu.RUnlock()
if fp == nil {
return "", ErrNoExist
}
fp.mu.RLock()
t := fp.t
fp.mu.RUnlock()
if t == nil {
return "", ErrDisabled
}
return t.desc, nil
}
func List() []string {
failpointsMu.RLock()
ret := make([]string, 0, len(failpoints))
for fp := range failpoints {
ret = append(ret, fp)
}
failpointsMu.RUnlock()
return ret
}
func register(failpath string, fp *Failpoint) {
failpointsMu.Lock()
failpoints[failpath] = fp
failpointsMu.Unlock()
if t, ok := envTerms[failpath]; ok {
Enable(failpath, t)
}
}

350
vendor/github.com/etcd-io/gofail/runtime/terms.go generated vendored Normal file
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@ -0,0 +1,350 @@
// Copyright 2016 CoreOS, Inc.
//
// 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 runtime
import (
"fmt"
"math/rand"
"os"
"os/exec"
"strings"
"sync"
"time"
)
var (
ErrExhausted = fmt.Errorf("failpoint: terms exhausted")
ErrBadParse = fmt.Errorf("failpoint: could not parse terms")
)
// terms encodes the state for a failpoint term string (see fail(9) for examples)
// <fp> :: <term> ( "->" <term> )*
type terms struct {
// chain is a slice of all the terms from desc
chain []*term
// desc is the full term given for the failpoint
desc string
// fpath is the failpoint path for these terms
fpath string
// mu protects the state of the terms chain
mu sync.Mutex
}
// term is an executable unit of the failpoint terms chain
type term struct {
desc string
mods mod
act actFunc
val interface{}
parent *terms
}
type mod interface {
allow() bool
}
type modCount struct{ c int }
func (mc *modCount) allow() bool {
if mc.c > 0 {
mc.c--
return true
}
return false
}
type modProb struct{ p float64 }
func (mp *modProb) allow() bool { return rand.Float64() <= mp.p }
type modList struct{ l []mod }
func (ml *modList) allow() bool {
for _, m := range ml.l {
if !m.allow() {
return false
}
}
return true
}
func newTerms(fpath, desc string) (*terms, error) {
chain := parse(desc)
if len(chain) == 0 {
return nil, ErrBadParse
}
t := &terms{chain: chain, desc: desc, fpath: fpath}
for _, c := range chain {
c.parent = t
}
return t, nil
}
func (t *terms) String() string { return t.desc }
func (t *terms) eval() (interface{}, error) {
t.mu.Lock()
defer t.mu.Unlock()
for _, term := range t.chain {
if term.mods.allow() {
return term.do(), nil
}
}
return nil, nil
}
// split terms from a -> b -> ... into [a, b, ...]
func parse(desc string) (chain []*term) {
origDesc := desc
for len(desc) != 0 {
t := parseTerm(desc)
if t == nil {
fmt.Printf("failed to parse %q past %q\n", origDesc, desc)
return nil
}
desc = desc[len(t.desc):]
chain = append(chain, t)
if len(desc) >= 2 {
if !strings.HasPrefix(desc, "->") {
fmt.Printf("failed to parse %q past %q, expected \"->\"\n", origDesc, desc)
return nil
}
desc = desc[2:]
}
}
return chain
}
// <term> :: <mod> <act> [ "(" <val> ")" ]
func parseTerm(desc string) *term {
t := &term{}
modStr, mods := parseMod(desc)
t.mods = &modList{mods}
actStr, act := parseAct(desc[len(modStr):])
t.act = act
valStr, val := parseVal(desc[len(modStr)+len(actStr):])
t.val = val
t.desc = desc[:len(modStr)+len(actStr)+len(valStr)]
if len(t.desc) == 0 {
return nil
}
return t
}
// <mod> :: ((<float> "%")|(<int> "*" ))*
func parseMod(desc string) (ret string, mods []mod) {
for {
s, v := parseIntFloat(desc)
if len(s) == 0 {
break
}
if len(s) == len(desc) {
return "", nil
}
switch v := v.(type) {
case float64:
if desc[len(s)] != '%' {
return "", nil
}
ret = ret + desc[:len(s)+1]
mods = append(mods, &modProb{v / 100.0})
desc = desc[len(s)+1:]
case int:
if desc[len(s)] != '*' {
return "", nil
}
ret = ret + desc[:len(s)+1]
mods = append(mods, &modCount{v})
desc = desc[len(s)+1:]
default:
panic("???")
}
}
return ret, mods
}
// parseIntFloat parses an int or float from a string and returns the string
// it parsed it from (unlike scanf).
func parseIntFloat(desc string) (string, interface{}) {
// parse for ints
i := 0
for i < len(desc) {
if desc[i] < '0' || desc[i] > '9' {
break
}
i++
}
if i == 0 {
return "", nil
}
intVal := int(0)
_, err := fmt.Sscanf(desc[:i], "%d", &intVal)
if err != nil {
return "", nil
}
if len(desc) == i {
return desc[:i], intVal
}
if desc[i] != '.' {
return desc[:i], intVal
}
// parse for floats
i++
if i == len(desc) {
return desc[:i], float64(intVal)
}
j := i
for i < len(desc) {
if desc[i] < '0' || desc[i] > '9' {
break
}
i++
}
if j == i {
return desc[:i], float64(intVal)
}
f := float64(0)
if _, err = fmt.Sscanf(desc[:i], "%f", &f); err != nil {
return "", nil
}
return desc[:i], f
}
// parseAct parses an action
// <act> :: "off" | "return" | "sleep" | "panic" | "break" | "print"
func parseAct(desc string) (string, actFunc) {
for k, v := range actMap {
if strings.HasPrefix(desc, k) {
return k, v
}
}
return "", nil
}
// <val> :: <int> | <string> | <bool> | <nothing>
func parseVal(desc string) (string, interface{}) {
// return => struct{}
if len(desc) == 0 {
return "", struct{}{}
}
// malformed
if len(desc) == 1 || desc[0] != '(' {
return "", nil
}
// return() => struct{}
if desc[1] == ')' {
return "()", struct{}{}
}
// return("s") => string
s := ""
n, err := fmt.Sscanf(desc[1:], "%q", &s)
if n == 1 && err == nil {
return desc[:len(s)+4], s
}
// return(1) => int
v := 0
n, err = fmt.Sscanf(desc[1:], "%d", &v)
if n == 1 && err == nil {
return desc[:len(fmt.Sprintf("%d", v))+2], v
}
// return(true) => bool
b := false
n, err = fmt.Sscanf(desc[1:], "%t", &b)
if n == 1 && err == nil {
return desc[:len(fmt.Sprintf("%t", b))+2], b
}
// unknown type; malformed input?
return "", nil
}
type actFunc func(*term) interface{}
var actMap = map[string]actFunc{
"off": actOff,
"return": actReturn,
"sleep": actSleep,
"panic": actPanic,
"break": actBreak,
"print": actPrint,
}
func (t *term) do() interface{} { return t.act(t) }
func actOff(t *term) interface{} { return nil }
func actReturn(t *term) interface{} { return t.val }
func actSleep(t *term) interface{} {
var dur time.Duration
switch v := t.val.(type) {
case int:
dur = time.Duration(v) * time.Millisecond
case string:
vDur, err := time.ParseDuration(v)
if err != nil {
fmt.Printf("failpoint: could not parse sleep(%v) on %s\n", v, t.parent.fpath)
return nil
}
dur = vDur
default:
fmt.Printf("failpoint: ignoring sleep(%v) on %s\n", v, t.parent.fpath)
return nil
}
time.Sleep(dur)
return nil
}
func actPanic(t *term) interface{} {
if t.val != nil {
panic(fmt.Sprintf("failpoint panic: %v", t.val))
}
panic("failpoint panic: " + t.parent.fpath)
}
func actBreak(t *term) interface{} {
p, perr := exec.LookPath(os.Args[0])
if perr != nil {
panic(perr)
}
cmd := exec.Command("gdb", p, fmt.Sprintf("%d", os.Getpid()))
cmd.Stdin = os.Stdin
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
if err := cmd.Start(); err != nil {
panic(err)
}
// wait for gdb prompt
// XXX: tried doing this by piping stdout here and waiting on "(gdb) "
// but the the output won't appear since the process is STOPed and
// can't copy it back to the actual stdout
time.Sleep(3 * time.Second)
// don't zombie gdb
go cmd.Wait()
return nil
}
func actPrint(t *term) interface{} {
fmt.Println("failpoint print:", t.parent.fpath)
return nil
}

3
vendor/modules.txt vendored
View File

@ -22,6 +22,9 @@ github.com/dgrijalva/jwt-go
# github.com/dustin/go-humanize v0.0.0-20171111073723-bb3d318650d4
## explicit
github.com/dustin/go-humanize
# github.com/etcd-io/gofail v0.0.0-20190801230047-ad7f989257ca
## explicit
github.com/etcd-io/gofail/runtime
# github.com/fatih/color v1.7.0
## explicit
# github.com/gogo/protobuf v1.2.1