mirror of
https://github.com/etcd-io/etcd.git
synced 2024-09-27 06:25:44 +00:00
510 lines
11 KiB
Go
510 lines
11 KiB
Go
/*
|
|
Copyright 2014 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 discovery
|
|
|
|
import (
|
|
"errors"
|
|
"math/rand"
|
|
"net/http"
|
|
"os"
|
|
"sort"
|
|
"strconv"
|
|
|
|
"reflect"
|
|
"testing"
|
|
"time"
|
|
|
|
"github.com/coreos/etcd/Godeps/_workspace/src/github.com/jonboulle/clockwork"
|
|
"github.com/coreos/etcd/client"
|
|
)
|
|
|
|
func TestProxyFuncFromEnvUnset(t *testing.T) {
|
|
os.Setenv(DiscoveryProxyEnv, "")
|
|
pf, err := proxyFuncFromEnv()
|
|
if pf != nil {
|
|
t.Fatal("unexpected non-nil proxyFunc")
|
|
}
|
|
if err != nil {
|
|
t.Fatalf("unexpected non-nil err: %v", err)
|
|
}
|
|
}
|
|
|
|
func TestProxyFuncFromEnvBad(t *testing.T) {
|
|
tests := []string{
|
|
"%%",
|
|
"http://foo.com/%1",
|
|
}
|
|
for i, in := range tests {
|
|
os.Setenv(DiscoveryProxyEnv, in)
|
|
pf, err := proxyFuncFromEnv()
|
|
if pf != nil {
|
|
t.Errorf("#%d: unexpected non-nil proxyFunc", i)
|
|
}
|
|
if err == nil {
|
|
t.Errorf("#%d: unexpected nil err", i)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestProxyFuncFromEnv(t *testing.T) {
|
|
tests := map[string]string{
|
|
"bar.com": "http://bar.com",
|
|
"http://disco.foo.bar": "http://disco.foo.bar",
|
|
}
|
|
for in, w := range tests {
|
|
os.Setenv(DiscoveryProxyEnv, in)
|
|
pf, err := proxyFuncFromEnv()
|
|
if pf == nil {
|
|
t.Errorf("%s: unexpected nil proxyFunc", in)
|
|
continue
|
|
}
|
|
if err != nil {
|
|
t.Errorf("%s: unexpected non-nil err: %v", in, err)
|
|
continue
|
|
}
|
|
g, err := pf(&http.Request{})
|
|
if err != nil {
|
|
t.Errorf("%s: unexpected non-nil err: %v", in, err)
|
|
}
|
|
if g.String() != w {
|
|
t.Errorf("%s: proxyURL=%q, want %q", in, g, w)
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
func TestCheckCluster(t *testing.T) {
|
|
cluster := "/prefix/1000"
|
|
self := "/1000/1"
|
|
|
|
tests := []struct {
|
|
nodes []*client.Node
|
|
werr error
|
|
wsize int
|
|
}{
|
|
{
|
|
// self is in the size range
|
|
[]*client.Node{
|
|
{Key: "/1000/_config/size", Value: "3", CreatedIndex: 1},
|
|
{Key: "/1000/_config/"},
|
|
{Key: self, CreatedIndex: 2},
|
|
{Key: "/1000/2", CreatedIndex: 3},
|
|
{Key: "/1000/3", CreatedIndex: 4},
|
|
{Key: "/1000/4", CreatedIndex: 5},
|
|
},
|
|
nil,
|
|
3,
|
|
},
|
|
{
|
|
// self is in the size range
|
|
[]*client.Node{
|
|
{Key: "/1000/_config/size", Value: "3", CreatedIndex: 1},
|
|
{Key: "/1000/_config/"},
|
|
{Key: "/1000/2", CreatedIndex: 2},
|
|
{Key: "/1000/3", CreatedIndex: 3},
|
|
{Key: self, CreatedIndex: 4},
|
|
{Key: "/1000/4", CreatedIndex: 5},
|
|
},
|
|
nil,
|
|
3,
|
|
},
|
|
{
|
|
// self is out of the size range
|
|
[]*client.Node{
|
|
{Key: "/1000/_config/size", Value: "3", CreatedIndex: 1},
|
|
{Key: "/1000/_config/"},
|
|
{Key: "/1000/2", CreatedIndex: 2},
|
|
{Key: "/1000/3", CreatedIndex: 3},
|
|
{Key: "/1000/4", CreatedIndex: 4},
|
|
{Key: self, CreatedIndex: 5},
|
|
},
|
|
ErrFullCluster,
|
|
3,
|
|
},
|
|
{
|
|
// self is not in the cluster
|
|
[]*client.Node{
|
|
{Key: "/1000/_config/size", Value: "3", CreatedIndex: 1},
|
|
{Key: "/1000/_config/"},
|
|
{Key: "/1000/2", CreatedIndex: 2},
|
|
{Key: "/1000/3", CreatedIndex: 3},
|
|
},
|
|
nil,
|
|
3,
|
|
},
|
|
{
|
|
[]*client.Node{
|
|
{Key: "/1000/_config/size", Value: "3", CreatedIndex: 1},
|
|
{Key: "/1000/_config/"},
|
|
{Key: "/1000/2", CreatedIndex: 2},
|
|
{Key: "/1000/3", CreatedIndex: 3},
|
|
{Key: "/1000/4", CreatedIndex: 4},
|
|
},
|
|
ErrFullCluster,
|
|
3,
|
|
},
|
|
{
|
|
// bad size key
|
|
[]*client.Node{
|
|
{Key: "/1000/_config/size", Value: "bad", CreatedIndex: 1},
|
|
},
|
|
ErrBadSizeKey,
|
|
0,
|
|
},
|
|
{
|
|
// no size key
|
|
[]*client.Node{},
|
|
ErrSizeNotFound,
|
|
0,
|
|
},
|
|
}
|
|
|
|
for i, tt := range tests {
|
|
rs := make([]*client.Response, 0)
|
|
if len(tt.nodes) > 0 {
|
|
rs = append(rs, &client.Response{Node: tt.nodes[0]})
|
|
rs = append(rs, &client.Response{
|
|
Node: &client.Node{
|
|
Key: cluster,
|
|
Nodes: tt.nodes[1:],
|
|
},
|
|
})
|
|
}
|
|
c := &clientWithResp{rs: rs}
|
|
d := discovery{cluster: cluster, id: 1, c: c}
|
|
|
|
cRetry := &clientWithRetry{failTimes: 3}
|
|
cRetry.rs = rs
|
|
fc := clockwork.NewFakeClock()
|
|
dRetry := discovery{cluster: cluster, id: 1, c: cRetry, clock: fc}
|
|
|
|
for _, d := range []discovery{d, dRetry} {
|
|
go func() {
|
|
for i := uint(1); i <= nRetries; i++ {
|
|
fc.BlockUntil(1)
|
|
fc.Advance(time.Second * (0x1 << i))
|
|
}
|
|
}()
|
|
ns, size, err := d.checkCluster()
|
|
if err != tt.werr {
|
|
t.Errorf("#%d: err = %v, want %v", i, err, tt.werr)
|
|
}
|
|
if reflect.DeepEqual(ns, tt.nodes) {
|
|
t.Errorf("#%d: nodes = %v, want %v", i, ns, tt.nodes)
|
|
}
|
|
if size != tt.wsize {
|
|
t.Errorf("#%d: size = %v, want %d", i, size, tt.wsize)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestWaitNodes(t *testing.T) {
|
|
all := client.Nodes{
|
|
0: {Key: "/1000/1", CreatedIndex: 2},
|
|
1: {Key: "/1000/2", CreatedIndex: 3},
|
|
2: {Key: "/1000/3", CreatedIndex: 4},
|
|
}
|
|
|
|
tests := []struct {
|
|
nodes client.Nodes
|
|
rs []*client.Response
|
|
}{
|
|
{
|
|
all,
|
|
[]*client.Response{},
|
|
},
|
|
{
|
|
all[:1],
|
|
[]*client.Response{
|
|
{Node: &client.Node{Key: "/1000/2", CreatedIndex: 3}},
|
|
{Node: &client.Node{Key: "/1000/3", CreatedIndex: 4}},
|
|
},
|
|
},
|
|
{
|
|
all[:2],
|
|
[]*client.Response{
|
|
{Node: &client.Node{Key: "/1000/3", CreatedIndex: 4}},
|
|
},
|
|
},
|
|
{
|
|
append(all, &client.Node{Key: "/1000/4", CreatedIndex: 5}),
|
|
[]*client.Response{
|
|
{Node: &client.Node{Key: "/1000/3", CreatedIndex: 4}},
|
|
},
|
|
},
|
|
}
|
|
|
|
for i, tt := range tests {
|
|
// Basic case
|
|
c := &clientWithResp{nil, &watcherWithResp{tt.rs}}
|
|
d := &discovery{cluster: "1000", c: c}
|
|
|
|
// Retry case
|
|
retryScanResp := make([]*client.Response, 0)
|
|
if len(tt.nodes) > 0 {
|
|
retryScanResp = append(retryScanResp, &client.Response{
|
|
Node: &client.Node{
|
|
Key: "1000",
|
|
Value: strconv.Itoa(3),
|
|
},
|
|
})
|
|
retryScanResp = append(retryScanResp, &client.Response{
|
|
Node: &client.Node{
|
|
Nodes: tt.nodes,
|
|
},
|
|
})
|
|
}
|
|
cRetry := &clientWithResp{
|
|
rs: retryScanResp,
|
|
w: &watcherWithRetry{rs: tt.rs, failTimes: 2},
|
|
}
|
|
fc := clockwork.NewFakeClock()
|
|
dRetry := &discovery{
|
|
cluster: "1000",
|
|
c: cRetry,
|
|
clock: fc,
|
|
}
|
|
|
|
for _, d := range []*discovery{d, dRetry} {
|
|
go func() {
|
|
for i := uint(1); i <= nRetries; i++ {
|
|
fc.BlockUntil(1)
|
|
fc.Advance(time.Second * (0x1 << i))
|
|
}
|
|
}()
|
|
g, err := d.waitNodes(tt.nodes, 3)
|
|
if err != nil {
|
|
t.Errorf("#%d: err = %v, want %v", i, err, nil)
|
|
}
|
|
if !reflect.DeepEqual(g, all) {
|
|
t.Errorf("#%d: all = %v, want %v", i, g, all)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestCreateSelf(t *testing.T) {
|
|
rs := []*client.Response{{Node: &client.Node{Key: "1000/1", CreatedIndex: 2}}}
|
|
|
|
w := &watcherWithResp{rs}
|
|
errw := &watcherWithErr{errors.New("watch err")}
|
|
|
|
c := &clientWithResp{rs, w}
|
|
errc := &clientWithErr{errors.New("create err"), w}
|
|
errwc := &clientWithResp{rs, errw}
|
|
|
|
tests := []struct {
|
|
c client.KeysAPI
|
|
werr error
|
|
}{
|
|
// no error
|
|
{c, nil},
|
|
// client.create returns an error
|
|
{errc, errc.err},
|
|
// watcher.next retuens an error
|
|
{errwc, errw.err},
|
|
}
|
|
|
|
for i, tt := range tests {
|
|
d := discovery{cluster: "1000", c: tt.c}
|
|
if err := d.createSelf(); err != tt.werr {
|
|
t.Errorf("#%d: err = %v, want %v", i, err, nil)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestNodesToCluster(t *testing.T) {
|
|
nodes := client.Nodes{
|
|
0: {Key: "/1000/1", Value: "1=1.1.1.1", CreatedIndex: 1},
|
|
1: {Key: "/1000/2", Value: "2=2.2.2.2", CreatedIndex: 2},
|
|
2: {Key: "/1000/3", Value: "3=3.3.3.3", CreatedIndex: 3},
|
|
}
|
|
w := "1=1.1.1.1,2=2.2.2.2,3=3.3.3.3"
|
|
|
|
cluster := nodesToCluster(nodes)
|
|
if !reflect.DeepEqual(cluster, w) {
|
|
t.Errorf("cluster = %v, want %v", cluster, w)
|
|
}
|
|
}
|
|
|
|
func TestSortableNodes(t *testing.T) {
|
|
ns := client.Nodes{
|
|
0: {CreatedIndex: 5},
|
|
1: {CreatedIndex: 1},
|
|
2: {CreatedIndex: 3},
|
|
3: {CreatedIndex: 4},
|
|
}
|
|
// add some randomness
|
|
for i := 0; i < 10000; i++ {
|
|
ns = append(ns, &client.Node{CreatedIndex: uint64(rand.Int31())})
|
|
}
|
|
sns := sortableNodes{ns}
|
|
sort.Sort(sns)
|
|
cis := make([]int, 0)
|
|
for _, n := range sns.Nodes {
|
|
cis = append(cis, int(n.CreatedIndex))
|
|
}
|
|
if sort.IntsAreSorted(cis) != true {
|
|
t.Errorf("isSorted = %v, want %v", sort.IntsAreSorted(cis), true)
|
|
}
|
|
cis = make([]int, 0)
|
|
for _, n := range ns {
|
|
cis = append(cis, int(n.CreatedIndex))
|
|
}
|
|
if sort.IntsAreSorted(cis) != true {
|
|
t.Errorf("isSorted = %v, want %v", sort.IntsAreSorted(cis), true)
|
|
}
|
|
}
|
|
|
|
func TestRetryFailure(t *testing.T) {
|
|
cluster := "1000"
|
|
c := &clientWithRetry{failTimes: 4}
|
|
fc := clockwork.NewFakeClock()
|
|
d := discovery{
|
|
cluster: cluster,
|
|
id: 1,
|
|
c: c,
|
|
clock: fc,
|
|
}
|
|
go func() {
|
|
for i := uint(1); i <= nRetries; i++ {
|
|
fc.BlockUntil(1)
|
|
fc.Advance(time.Second * (0x1 << i))
|
|
}
|
|
}()
|
|
if _, _, err := d.checkCluster(); err != ErrTooManyRetries {
|
|
t.Errorf("err = %v, want %v", err, ErrTooManyRetries)
|
|
}
|
|
}
|
|
|
|
type clientWithResp struct {
|
|
rs []*client.Response
|
|
w client.Watcher
|
|
}
|
|
|
|
func (c *clientWithResp) Create(key string, value string, ttl time.Duration) (*client.Response, error) {
|
|
if len(c.rs) == 0 {
|
|
return &client.Response{}, nil
|
|
}
|
|
r := c.rs[0]
|
|
c.rs = c.rs[1:]
|
|
return r, nil
|
|
}
|
|
|
|
func (c *clientWithResp) Get(key string) (*client.Response, error) {
|
|
if len(c.rs) == 0 {
|
|
return &client.Response{}, client.ErrKeyNoExist
|
|
}
|
|
r := c.rs[0]
|
|
c.rs = append(c.rs[1:], r)
|
|
return r, nil
|
|
}
|
|
|
|
func (c *clientWithResp) Watch(key string, waitIndex uint64) client.Watcher {
|
|
return c.w
|
|
}
|
|
|
|
func (c *clientWithResp) RecursiveWatch(key string, waitIndex uint64) client.Watcher {
|
|
return c.w
|
|
}
|
|
|
|
type clientWithErr struct {
|
|
err error
|
|
w client.Watcher
|
|
}
|
|
|
|
func (c *clientWithErr) Create(key string, value string, ttl time.Duration) (*client.Response, error) {
|
|
return &client.Response{}, c.err
|
|
}
|
|
|
|
func (c *clientWithErr) Get(key string) (*client.Response, error) {
|
|
return &client.Response{}, c.err
|
|
}
|
|
|
|
func (c *clientWithErr) Watch(key string, waitIndex uint64) client.Watcher {
|
|
return c.w
|
|
}
|
|
|
|
func (c *clientWithErr) RecursiveWatch(key string, waitIndex uint64) client.Watcher {
|
|
return c.w
|
|
}
|
|
|
|
type watcherWithResp struct {
|
|
rs []*client.Response
|
|
}
|
|
|
|
func (w *watcherWithResp) Next() (*client.Response, error) {
|
|
if len(w.rs) == 0 {
|
|
return &client.Response{}, nil
|
|
}
|
|
r := w.rs[0]
|
|
w.rs = w.rs[1:]
|
|
return r, nil
|
|
}
|
|
|
|
type watcherWithErr struct {
|
|
err error
|
|
}
|
|
|
|
func (w *watcherWithErr) Next() (*client.Response, error) {
|
|
return &client.Response{}, w.err
|
|
}
|
|
|
|
// clientWithRetry will timeout all requests up to failTimes
|
|
type clientWithRetry struct {
|
|
clientWithResp
|
|
failCount int
|
|
failTimes int
|
|
}
|
|
|
|
func (c *clientWithRetry) Create(key string, value string, ttl time.Duration) (*client.Response, error) {
|
|
if c.failCount < c.failTimes {
|
|
c.failCount++
|
|
return nil, client.ErrTimeout
|
|
}
|
|
return c.clientWithResp.Create(key, value, ttl)
|
|
}
|
|
|
|
func (c *clientWithRetry) Get(key string) (*client.Response, error) {
|
|
if c.failCount < c.failTimes {
|
|
c.failCount++
|
|
return nil, client.ErrTimeout
|
|
}
|
|
return c.clientWithResp.Get(key)
|
|
}
|
|
|
|
// watcherWithRetry will timeout all requests up to failTimes
|
|
type watcherWithRetry struct {
|
|
rs []*client.Response
|
|
failCount int
|
|
failTimes int
|
|
}
|
|
|
|
func (w *watcherWithRetry) Next() (*client.Response, error) {
|
|
if w.failCount < w.failTimes {
|
|
w.failCount++
|
|
return nil, client.ErrTimeout
|
|
}
|
|
if len(w.rs) == 0 {
|
|
return &client.Response{}, nil
|
|
}
|
|
r := w.rs[0]
|
|
w.rs = w.rs[1:]
|
|
return r, nil
|
|
}
|