Unity-Technologies
/
grpc-go
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internal/resolver/unix: Implemented unix resolver. (#3890)

This commit is contained in:
Garrett Gutierrez 2020-10-16 11:52:54 -07:00 коммит произвёл GitHub
Родитель ea47aa91b3
Коммит 4be647f7f6
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Идентификатор ключа GPG: 4AEE18F83AFDEB23
15 изменённых файлов: 229 добавлений и 140 удалений
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2
balancer/rls/internal/config.go
Просмотреть файл

@ -201,7 +201,7 @@ func (*rlsBB) ParseConfig(c json.RawMessage) (serviceconfig.LoadBalancingConfig,
if lookupService == "" {
return nil, fmt.Errorf("rls: empty lookup_service in service config {%+v}", string(c))
}
parsedTarget := grpcutil.ParseTarget(lookupService)
parsedTarget := grpcutil.ParseTarget(lookupService, false)
if parsedTarget.Scheme == "" {
parsedTarget.Scheme = resolver.GetDefaultScheme()
}

17
clientconn.go
Просмотреть файл

@ -23,7 +23,6 @@ import (
"errors"
"fmt"
"math"
"net"
"reflect"
"strings"
"sync"
@ -48,6 +47,7 @@ import (
_ "google.golang.org/grpc/balancer/roundrobin" // To register roundrobin.
_ "google.golang.org/grpc/internal/resolver/dns" // To register dns resolver.
_ "google.golang.org/grpc/internal/resolver/passthrough" // To register passthrough resolver.
_ "google.golang.org/grpc/internal/resolver/unix" // To register unix resolver.
)
const (
@ -191,16 +191,6 @@ func DialContext(ctx context.Context, target string, opts ...DialOption) (conn *
}
cc.mkp = cc.dopts.copts.KeepaliveParams
if cc.dopts.copts.Dialer == nil {
cc.dopts.copts.Dialer = func(ctx context.Context, addr string) (net.Conn, error) {
network, addr := parseDialTarget(addr)
return (&net.Dialer{}).DialContext(ctx, network, addr)
}
if cc.dopts.withProxy {
cc.dopts.copts.Dialer = newProxyDialer(cc.dopts.copts.Dialer)
}
}
if cc.dopts.copts.UserAgent != "" {
cc.dopts.copts.UserAgent += " " + grpcUA
} else {
@ -244,8 +234,7 @@ func DialContext(ctx context.Context, target string, opts ...DialOption) (conn *
}
// Determine the resolver to use.
cc.parsedTarget = grpcutil.ParseTarget(cc.target)
unixScheme := strings.HasPrefix(cc.target, "unix:")
cc.parsedTarget = grpcutil.ParseTarget(cc.target, cc.dopts.copts.Dialer != nil)
channelz.Infof(logger, cc.channelzID, "parsed scheme: %q", cc.parsedTarget.Scheme)
resolverBuilder := cc.getResolver(cc.parsedTarget.Scheme)
if resolverBuilder == nil {
@ -268,7 +257,7 @@ func DialContext(ctx context.Context, target string, opts ...DialOption) (conn *
cc.authority = creds.Info().ServerName
} else if cc.dopts.insecure && cc.dopts.authority != "" {
cc.authority = cc.dopts.authority
} else if unixScheme {
} else if strings.HasPrefix(cc.target, "unix:") {
cc.authority = "localhost"
} else {
// Use endpoint from "scheme://authority/endpoint" as the default

5
dialoptions.go
Просмотреть файл

@ -71,7 +71,6 @@ type dialOptions struct {
// we need to be able to configure this in tests.
resolveNowBackoff func(int) time.Duration
resolvers []resolver.Builder
withProxy bool
}
// DialOption configures how we set up the connection.
@ -325,7 +324,7 @@ func WithInsecure() DialOption {
// later release.
func WithNoProxy() DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.withProxy = false
o.copts.UseProxy = false
})
}
@ -595,9 +594,9 @@ func defaultDialOptions() dialOptions {
copts: transport.ConnectOptions{
WriteBufferSize: defaultWriteBufSize,
ReadBufferSize: defaultReadBufSize,
UseProxy: true,
},
resolveNowBackoff: internalbackoff.DefaultExponential.Backoff,
withProxy: true,
}
}

17
internal/grpcutil/target.go
Просмотреть файл

@ -37,19 +37,32 @@ func split2(s, sep string) (string, string, bool) {
}
// ParseTarget splits target into a resolver.Target struct containing scheme,
// authority and endpoint.
// authority and endpoint. skipUnixColonParsing indicates that the parse should
// not parse "unix:[path]" cases. This should be true in cases where a custom
// dialer is present, to prevent a behavior change.
//
// If target is not a valid scheme://authority/endpoint, it returns {Endpoint:
// target}.
func ParseTarget(target string) (ret resolver.Target) {
func ParseTarget(target string, skipUnixColonParsing bool) (ret resolver.Target) {
var ok bool
ret.Scheme, ret.Endpoint, ok = split2(target, "://")
if !ok {
if strings.HasPrefix(target, "unix:") && !skipUnixColonParsing {
// Handle the "unix:[path]" case, because splitting on :// only
// handles the "unix://[/absolute/path]" case. Only handle if the
// dialer is nil, to avoid a behavior change with custom dialers.
return resolver.Target{Scheme: "unix", Endpoint: target[len("unix:"):]}
}
return resolver.Target{Endpoint: target}
}
ret.Authority, ret.Endpoint, ok = split2(ret.Endpoint, "/")
if !ok {
return resolver.Target{Endpoint: target}
}
if ret.Scheme == "unix" {
// Add the "/" back in the unix case, so the unix resolver receives the
// actual endpoint.
ret.Endpoint = "/" + ret.Endpoint
}
return ret
}

31
internal/grpcutil/target_test.go
Просмотреть файл

@ -32,17 +32,22 @@ func TestParseTarget(t *testing.T) {
{Scheme: "passthrough", Authority: "", Endpoint: "/unix/socket/address"},
} {
str := test.Scheme + "://" + test.Authority + "/" + test.Endpoint
got := ParseTarget(str)
got := ParseTarget(str, false)
if got != test {
t.Errorf("ParseTarget(%q) = %+v, want %+v", str, got, test)
t.Errorf("ParseTarget(%q, false) = %+v, want %+v", str, got, test)
}
got = ParseTarget(str, true)
if got != test {
t.Errorf("ParseTarget(%q, true) = %+v, want %+v", str, got, test)
}
}
}
func TestParseTargetString(t *testing.T) {
for _, test := range []struct {
targetStr string
want resolver.Target
targetStr string
want resolver.Target
wantWithDialer resolver.Target
}{
{targetStr: "", want: resolver.Target{Scheme: "", Authority: "", Endpoint: ""}},
{targetStr: ":///", want: resolver.Target{Scheme: "", Authority: "", Endpoint: ""}},
@ -70,10 +75,24 @@ func TestParseTargetString(t *testing.T) {
{targetStr: "a:/b", want: resolver.Target{Scheme: "", Authority: "", Endpoint: "a:/b"}},
{targetStr: "a//b", want: resolver.Target{Scheme: "", Authority: "", Endpoint: "a//b"}},
{targetStr: "a://b", want: resolver.Target{Scheme: "", Authority: "", Endpoint: "a://b"}},
// Unix cases without custom dialer.
// unix:[local_path] and unix:[/absolute] have different behaviors with
// a custom dialer, to prevent behavior changes with custom dialers.
{targetStr: "unix:domain", want: resolver.Target{Scheme: "unix", Authority: "", Endpoint: "domain"}, wantWithDialer: resolver.Target{Scheme: "", Authority: "", Endpoint: "unix:domain"}},
{targetStr: "unix:/domain", want: resolver.Target{Scheme: "unix", Authority: "", Endpoint: "/domain"}, wantWithDialer: resolver.Target{Scheme: "", Authority: "", Endpoint: "unix:/domain"}},
} {
got := ParseTarget(test.targetStr)
got := ParseTarget(test.targetStr, false)
if got != test.want {
t.Errorf("ParseTarget(%q) = %+v, want %+v", test.targetStr, got, test.want)
t.Errorf("ParseTarget(%q, false) = %+v, want %+v", test.targetStr, got, test.want)
}
wantWithDialer := test.wantWithDialer
if wantWithDialer == (resolver.Target{}) {
wantWithDialer = test.want
}
got = ParseTarget(test.targetStr, true)
if got != wantWithDialer {
t.Errorf("ParseTarget(%q, true) = %+v, want %+v", test.targetStr, got, wantWithDialer)
}
}
}

49
internal/resolver/unix/unix.go Normal file
Просмотреть файл

@ -0,0 +1,49 @@
/*
*
* Copyright 2020 gRPC 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 unix implements a resolver for unix targets.
package unix
import (
"google.golang.org/grpc/internal/transport/networktype"
"google.golang.org/grpc/resolver"
)
const scheme = "unix"
type builder struct{}
func (*builder) Build(target resolver.Target, cc resolver.ClientConn, _ resolver.BuildOptions) (resolver.Resolver, error) {
cc.UpdateState(resolver.State{Addresses: []resolver.Address{networktype.Set(resolver.Address{Addr: target.Endpoint}, "unix")}})
return &nopResolver{}, nil
}
func (*builder) Scheme() string {
return scheme
}
type nopResolver struct {
}
func (*nopResolver) ResolveNow(resolver.ResolveNowOptions) {}
func (*nopResolver) Close() {}
func init() {
resolver.Register(&builder{})
}

16
internal/transport/http2_client.go
Просмотреть файл

@ -33,6 +33,7 @@ import (
"golang.org/x/net/http2"
"golang.org/x/net/http2/hpack"
"google.golang.org/grpc/internal/grpcutil"
"google.golang.org/grpc/internal/transport/networktype"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/credentials"
@ -137,11 +138,18 @@ type http2Client struct {
connectionID uint64
}
func dial(ctx context.Context, fn func(context.Context, string) (net.Conn, error), addr string) (net.Conn, error) {
func dial(ctx context.Context, fn func(context.Context, string) (net.Conn, error), addr resolver.Address, useProxy bool, grpcUA string) (net.Conn, error) {
if fn != nil {
return fn(ctx, addr)
return fn(ctx, addr.Addr)
}
return (&net.Dialer{}).DialContext(ctx, "tcp", addr)
networkType := "tcp"
if n, ok := networktype.Get(addr); ok {
networkType = n
}
if networkType == "tcp" && useProxy {
return proxyDial(ctx, addr.Addr, grpcUA)
}
return (&net.Dialer{}).DialContext(ctx, networkType, addr.Addr)
}
func isTemporary(err error) bool {
@ -172,7 +180,7 @@ func newHTTP2Client(connectCtx, ctx context.Context, addr resolver.Address, opts
}
}()
conn, err := dial(connectCtx, opts.Dialer, addr.Addr)
conn, err := dial(connectCtx, opts.Dialer, addr, opts.UseProxy, opts.UserAgent)
if err != nil {
if opts.FailOnNonTempDialError {
return nil, connectionErrorf(isTemporary(err), err, "transport: error while dialing: %v", err)

46
internal/transport/networktype/networktype.go Normal file
Просмотреть файл

@ -0,0 +1,46 @@
/*
*
* Copyright 2020 gRPC 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 networktype declares the network type to be used in the default
// dailer. Attribute of a resolver.Address.
package networktype
import (
"google.golang.org/grpc/resolver"
)
// keyType is the key to use for storing State in Attributes.
type keyType string
const key = keyType("grpc.internal.transport.networktype")
// Set returns a copy of the provided address with attributes containing networkType.
func Set(address resolver.Address, networkType string) resolver.Address {
address.Attributes = address.Attributes.WithValues(key, networkType)
return address
}
// Get returns the network type in the resolver.Address and true, or "", false
// if not present.
func Get(address resolver.Address) (string, bool) {
v := address.Attributes.Value(key)
if v == nil {
return "", false
}
return v.(string), true
}

52
proxy.go → internal/transport/proxy.go
Просмотреть файл

@ -16,13 +16,12 @@
*
*/
package grpc
package transport
import (
"bufio"
"context"
"encoding/base64"
"errors"
"fmt"
"io"
"net"
@ -34,8 +33,6 @@ import (
const proxyAuthHeaderKey = "Proxy-Authorization"
var (
// errDisabled indicates that proxy is disabled for the address.
errDisabled = errors.New("proxy is disabled for the address")
// The following variable will be overwritten in the tests.
httpProxyFromEnvironment = http.ProxyFromEnvironment
)
@ -51,9 +48,6 @@ func mapAddress(ctx context.Context, address string) (*url.URL, error) {
if err != nil {
return nil, err
}
if url == nil {
return nil, errDisabled
}
return url, nil
}
@ -76,7 +70,7 @@ func basicAuth(username, password string) string {
return base64.StdEncoding.EncodeToString([]byte(auth))
}
func doHTTPConnectHandshake(ctx context.Context, conn net.Conn, backendAddr string, proxyURL *url.URL) (_ net.Conn, err error) {
func doHTTPConnectHandshake(ctx context.Context, conn net.Conn, backendAddr string, proxyURL *url.URL, grpcUA string) (_ net.Conn, err error) {
defer func() {
if err != nil {
conn.Close()
@ -115,32 +109,28 @@ func doHTTPConnectHandshake(ctx context.Context, conn net.Conn, backendAddr stri
return &bufConn{Conn: conn, r: r}, nil
}
// newProxyDialer returns a dialer that connects to proxy first if necessary.
// The returned dialer checks if a proxy is necessary, dial to the proxy with the
// provided dialer, does HTTP CONNECT handshake and returns the connection.
func newProxyDialer(dialer func(context.Context, string) (net.Conn, error)) func(context.Context, string) (net.Conn, error) {
return func(ctx context.Context, addr string) (conn net.Conn, err error) {
var newAddr string
proxyURL, err := mapAddress(ctx, addr)
if err != nil {
if err != errDisabled {
return nil, err
}
newAddr = addr
} else {
newAddr = proxyURL.Host
}
// proxyDial dials, connecting to a proxy first if necessary. Checks if a proxy
// is necessary, dials, does the HTTP CONNECT handshake, and returns the
// connection.
func proxyDial(ctx context.Context, addr string, grpcUA string) (conn net.Conn, err error) {
newAddr := addr
proxyURL, err := mapAddress(ctx, addr)
if err != nil {
return nil, err
}
if proxyURL != nil {
newAddr = proxyURL.Host
}
conn, err = dialer(ctx, newAddr)
if err != nil {
return
}
if proxyURL != nil {
// proxy is disabled if proxyURL is nil.
conn, err = doHTTPConnectHandshake(ctx, conn, addr, proxyURL)
}
conn, err = (&net.Dialer{}).DialContext(ctx, "tcp", newAddr)
if err != nil {
return
}
if proxyURL != nil {
// proxy is disabled if proxyURL is nil.
conn, err = doHTTPConnectHandshake(ctx, conn, addr, proxyURL, grpcUA)
}
return
}
func sendHTTPRequest(ctx context.Context, req *http.Request, conn net.Conn) error {

16
proxy_test.go → internal/transport/proxy_test.go
Просмотреть файл

@ -18,7 +18,7 @@
*
*/
package grpc
package transport
import (
"bufio"
@ -138,15 +138,9 @@ func testHTTPConnect(t *testing.T, proxyURLModify func(*url.URL) *url.URL, proxy
defer overwrite(hpfe)()
// Dial to proxy server.
dialer := newProxyDialer(func(ctx context.Context, addr string) (net.Conn, error) {
if deadline, ok := ctx.Deadline(); ok {
return net.DialTimeout("tcp", addr, time.Until(deadline))
}
return net.Dial("tcp", addr)
})
ctx, cancel := context.WithTimeout(context.Background(), time.Second)
defer cancel()
c, err := dialer(ctx, blis.Addr().String())
c, err := proxyDial(ctx, blis.Addr().String(), "test")
if err != nil {
t.Fatalf("http connect Dial failed: %v", err)
}
@ -173,9 +167,6 @@ func (s) TestHTTPConnect(t *testing.T) {
if req.Method != http.MethodConnect {
return fmt.Errorf("unexpected Method %q, want %q", req.Method, http.MethodConnect)
}
if req.UserAgent() != grpcUA {
return fmt.Errorf("unexpect user agent %q, want %q", req.UserAgent(), grpcUA)
}
return nil
},
)
@ -195,9 +186,6 @@ func (s) TestHTTPConnectBasicAuth(t *testing.T) {
if req.Method != http.MethodConnect {
return fmt.Errorf("unexpected Method %q, want %q", req.Method, http.MethodConnect)
}
if req.UserAgent() != grpcUA {
return fmt.Errorf("unexpect user agent %q, want %q", req.UserAgent(), grpcUA)
}
wantProxyAuthStr := "Basic " + base64.StdEncoding.EncodeToString([]byte(user+":"+password))
if got := req.Header.Get(proxyAuthHeaderKey); got != wantProxyAuthStr {
gotDecoded, _ := base64.StdEncoding.DecodeString(got)

2
internal/transport/transport.go
Просмотреть файл

@ -569,6 +569,8 @@ type ConnectOptions struct {
ChannelzParentID int64
// MaxHeaderListSize sets the max (uncompressed) size of header list that is prepared to be received.
MaxHeaderListSize *uint32
// UseProxy specifies if a proxy should be used.
UseProxy bool
}
// NewClientTransport establishes the transport with the required ConnectOptions

3
resolver_conn_wrapper_test.go
Просмотреть файл

@ -45,9 +45,6 @@ func (s) TestDialParseTargetUnknownScheme(t *testing.T) {
}{
{"/unix/socket/address", "/unix/socket/address"},
// Special test for "unix:///".
{"unix:///unix/socket/address", "unix:///unix/socket/address"},
// For known scheme.
{"passthrough://a.server.com/google.com", "google.com"},
} {

35
rpc_util.go
Просмотреть файл

@ -27,7 +27,6 @@ import (
"io"
"io/ioutil"
"math"
"net/url"
"strings"
"sync"
"time"
@ -872,40 +871,6 @@ func setCallInfoCodec(c *callInfo) error {
return nil
}
// parseDialTarget returns the network and address to pass to dialer
func parseDialTarget(target string) (net string, addr string) {
net = "tcp"
m1 := strings.Index(target, ":")
m2 := strings.Index(target, ":/")
// handle unix:addr which will fail with url.Parse
if m1 >= 0 && m2 < 0 {
if n := target[0:m1]; n == "unix" {
net = n
addr = target[m1+1:]
return net, addr
}
}
if m2 >= 0 {
t, err := url.Parse(target)
if err != nil {
return net, target
}
scheme := t.Scheme
addr = t.Path
if scheme == "unix" {
net = scheme
if addr == "" {
addr = t.Host
}
return net, addr
}
}
return net, target
}
// channelzData is used to store channelz related data for ClientConn, addrConn and Server.
// These fields cannot be embedded in the original structs (e.g. ClientConn), since to do atomic
// operation on int64 variable on 32-bit machine, user is responsible to enforce memory alignment.

21
rpc_util_test.go
Просмотреть файл

@ -191,27 +191,6 @@ func (s) TestToRPCErr(t *testing.T) {
}
}
func (s) TestParseDialTarget(t *testing.T) {
for _, test := range []struct {
target, wantNet, wantAddr string
}{
{"unix:etcd:0", "unix", "etcd:0"},
{"unix:///tmp/unix-3", "unix", "/tmp/unix-3"},
{"unix://domain", "unix", "domain"},
{"unix://etcd:0", "unix", "etcd:0"},
{"unix:///etcd:0", "unix", "/etcd:0"},
{"passthrough://unix://domain", "tcp", "passthrough://unix://domain"},
{"https://google.com:443", "tcp", "https://google.com:443"},
{"dns:///google.com", "tcp", "dns:///google.com"},
{"/unix/socket/address", "tcp", "/unix/socket/address"},
} {
gotNet, gotAddr := parseDialTarget(test.target)
if gotNet != test.wantNet || gotAddr != test.wantAddr {
t.Errorf("parseDialTarget(%q) = %s, %s want %s, %s", test.target, gotNet, gotAddr, test.wantNet, test.wantAddr)
}
}
}
// bmEncode benchmarks encoding a Protocol Buffer message containing mSize
// bytes.
func bmEncode(b *testing.B, mSize int) {

57
test/authority_test.go
Просмотреть файл

@ -21,17 +21,19 @@ package test
import (
"context"
"fmt"
"net"
"os"
"testing"
"time"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/metadata"
"google.golang.org/grpc/status"
testpb "google.golang.org/grpc/test/grpc_testing"
)
func runUnixTest(t *testing.T, address, target, expectedAuthority string) {
func runUnixTest(t *testing.T, address, target, expectedAuthority string, dialer func(context.Context, string) (net.Conn, error)) {
if err := os.RemoveAll(address); err != nil {
t.Fatalf("Error removing socket file %v: %v\n", address, err)
}
@ -57,7 +59,11 @@ func runUnixTest(t *testing.T, address, target, expectedAuthority string) {
address: address,
target: target,
}
if err := us.Start(nil); err != nil {
opts := []grpc.DialOption{}
if dialer != nil {
opts = append(opts, grpc.WithContextDialer(dialer))
}
if err := us.Start(nil, opts...); err != nil {
t.Fatalf("Error starting endpoint server: %v", err)
return
}
@ -70,6 +76,8 @@ func runUnixTest(t *testing.T, address, target, expectedAuthority string) {
}
}
// TestUnix does end to end tests with the various supported unix target
// formats, ensuring that the authority is set to localhost in every case.
func (s) TestUnix(t *testing.T) {
tests := []struct {
name string
@ -78,19 +86,19 @@ func (s) TestUnix(t *testing.T) {
authority string
}{
{
name: "Unix1",
name: "UnixRelative",
address: "sock.sock",
target: "unix:sock.sock",
authority: "localhost",
},
{
name: "Unix2",
name: "UnixAbsolute",
address: "/tmp/sock.sock",
target: "unix:/tmp/sock.sock",
authority: "localhost",
},
{
name: "Unix3",
name: "UnixAbsoluteAlternate",
address: "/tmp/sock.sock",
target: "unix:///tmp/sock.sock",
authority: "localhost",
@ -98,7 +106,44 @@ func (s) TestUnix(t *testing.T) {
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
runUnixTest(t, test.address, test.target, test.authority)
runUnixTest(t, test.address, test.target, test.authority, nil)
})
}
}
// TestUnixCustomDialer does end to end tests with various supported unix target
// formats, ensuring that the target sent to the dialer does NOT have the
// "unix:" prefix stripped.
func (s) TestUnixCustomDialer(t *testing.T) {
tests := []struct {
name string
address string
target string
authority string
}{
{
name: "UnixRelative",
address: "sock.sock",
target: "unix:sock.sock",
authority: "localhost",
},
{
name: "UnixAbsolute",
address: "/tmp/sock.sock",
target: "unix:/tmp/sock.sock",
authority: "localhost",
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
dialer := func(ctx context.Context, address string) (net.Conn, error) {
if address != test.target {
return nil, fmt.Errorf("expected target %v in custom dialer, instead got %v", test.target, address)
}
address = address[len("unix:"):]
return (&net.Dialer{}).DialContext(ctx, "unix", address)
}
runUnixTest(t, test.address, test.target, test.authority, dialer)
})
}
}