444 lines
12 KiB
Go
444 lines
12 KiB
Go
|
/*
|
||
|
|
*
|
||
|
|
* Copyright 2017 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 grpc
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"math"
|
||
|
|
"testing"
|
||
|
|
"time"
|
||
|
|
|
||
|
|
"golang.org/x/net/context"
|
||
|
|
"google.golang.org/grpc/balancer/roundrobin"
|
||
|
|
_ "google.golang.org/grpc/grpclog/glogger"
|
||
|
|
"google.golang.org/grpc/resolver"
|
||
|
|
"google.golang.org/grpc/resolver/manual"
|
||
|
|
"google.golang.org/grpc/test/leakcheck"
|
||
|
|
)
|
||
|
|
|
||
|
|
func checkPickFirst(cc *ClientConn, servers []*server) error {
|
||
|
|
var (
|
||
|
|
req = "port"
|
||
|
|
reply string
|
||
|
|
err error
|
||
|
|
)
|
||
|
|
connected := false
|
||
|
|
for i := 0; i < 5000; i++ {
|
||
|
|
if err = Invoke(context.Background(), "/foo/bar", &req, &reply, cc); errorDesc(err) == servers[0].port {
|
||
|
|
if connected {
|
||
|
|
// connected is set to false if peer is not server[0]. So if
|
||
|
|
// connected is true here, this is the second time we saw
|
||
|
|
// server[0] in a row. Break because pickfirst is in effect.
|
||
|
|
break
|
||
|
|
}
|
||
|
|
connected = true
|
||
|
|
} else {
|
||
|
|
connected = false
|
||
|
|
}
|
||
|
|
time.Sleep(time.Millisecond)
|
||
|
|
}
|
||
|
|
if !connected {
|
||
|
|
return fmt.Errorf("pickfirst is not in effect after 5 second, EmptyCall() = _, %v, want _, %v", err, servers[0].port)
|
||
|
|
}
|
||
|
|
// The following RPCs should all succeed with the first server.
|
||
|
|
for i := 0; i < 3; i++ {
|
||
|
|
err = Invoke(context.Background(), "/foo/bar", &req, &reply, cc)
|
||
|
|
if errorDesc(err) != servers[0].port {
|
||
|
|
return fmt.Errorf("Index %d: want peer %v, got peer %v", i, servers[0].port, err)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func checkRoundRobin(cc *ClientConn, servers []*server) error {
|
||
|
|
var (
|
||
|
|
req = "port"
|
||
|
|
reply string
|
||
|
|
err error
|
||
|
|
)
|
||
|
|
|
||
|
|
// Make sure connections to all servers are up.
|
||
|
|
for i := 0; i < 2; i++ {
|
||
|
|
// Do this check twice, otherwise the first RPC's transport may still be
|
||
|
|
// picked by the closing pickfirst balancer, and the test becomes flaky.
|
||
|
|
for _, s := range servers {
|
||
|
|
var up bool
|
||
|
|
for i := 0; i < 5000; i++ {
|
||
|
|
if err = Invoke(context.Background(), "/foo/bar", &req, &reply, cc); errorDesc(err) == s.port {
|
||
|
|
up = true
|
||
|
|
break
|
||
|
|
}
|
||
|
|
time.Sleep(time.Millisecond)
|
||
|
|
}
|
||
|
|
if !up {
|
||
|
|
return fmt.Errorf("server %v is not up within 5 second", s.port)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
serverCount := len(servers)
|
||
|
|
for i := 0; i < 3*serverCount; i++ {
|
||
|
|
err = Invoke(context.Background(), "/foo/bar", &req, &reply, cc)
|
||
|
|
if errorDesc(err) != servers[i%serverCount].port {
|
||
|
|
return fmt.Errorf("Index %d: want peer %v, got peer %v", i, servers[i%serverCount].port, err)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func TestSwitchBalancer(t *testing.T) {
|
||
|
|
defer leakcheck.Check(t)
|
||
|
|
r, rcleanup := manual.GenerateAndRegisterManualResolver()
|
||
|
|
defer rcleanup()
|
||
|
|
|
||
|
|
numServers := 2
|
||
|
|
servers, _, scleanup := startServers(t, numServers, math.MaxInt32)
|
||
|
|
defer scleanup()
|
||
|
|
|
||
|
|
cc, err := Dial(r.Scheme()+":///test.server", WithInsecure(), WithCodec(testCodec{}))
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("failed to dial: %v", err)
|
||
|
|
}
|
||
|
|
defer cc.Close()
|
||
|
|
r.NewAddress([]resolver.Address{{Addr: servers[0].addr}, {Addr: servers[1].addr}})
|
||
|
|
// The default balancer is pickfirst.
|
||
|
|
if err := checkPickFirst(cc, servers); err != nil {
|
||
|
|
t.Fatalf("check pickfirst returned non-nil error: %v", err)
|
||
|
|
}
|
||
|
|
// Switch to roundrobin.
|
||
|
|
cc.handleServiceConfig(`{"loadBalancingPolicy": "round_robin"}`)
|
||
|
|
if err := checkRoundRobin(cc, servers); err != nil {
|
||
|
|
t.Fatalf("check roundrobin returned non-nil error: %v", err)
|
||
|
|
}
|
||
|
|
// Switch to pickfirst.
|
||
|
|
cc.handleServiceConfig(`{"loadBalancingPolicy": "pick_first"}`)
|
||
|
|
if err := checkPickFirst(cc, servers); err != nil {
|
||
|
|
t.Fatalf("check pickfirst returned non-nil error: %v", err)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Test that balancer specified by dial option will not be overridden.
|
||
|
|
func TestBalancerDialOption(t *testing.T) {
|
||
|
|
defer leakcheck.Check(t)
|
||
|
|
r, rcleanup := manual.GenerateAndRegisterManualResolver()
|
||
|
|
defer rcleanup()
|
||
|
|
|
||
|
|
numServers := 2
|
||
|
|
servers, _, scleanup := startServers(t, numServers, math.MaxInt32)
|
||
|
|
defer scleanup()
|
||
|
|
|
||
|
|
cc, err := Dial(r.Scheme()+":///test.server", WithInsecure(), WithCodec(testCodec{}), WithBalancerName(roundrobin.Name))
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("failed to dial: %v", err)
|
||
|
|
}
|
||
|
|
defer cc.Close()
|
||
|
|
r.NewAddress([]resolver.Address{{Addr: servers[0].addr}, {Addr: servers[1].addr}})
|
||
|
|
// The init balancer is roundrobin.
|
||
|
|
if err := checkRoundRobin(cc, servers); err != nil {
|
||
|
|
t.Fatalf("check roundrobin returned non-nil error: %v", err)
|
||
|
|
}
|
||
|
|
// Switch to pickfirst.
|
||
|
|
cc.handleServiceConfig(`{"loadBalancingPolicy": "pick_first"}`)
|
||
|
|
// Balancer is still roundrobin.
|
||
|
|
if err := checkRoundRobin(cc, servers); err != nil {
|
||
|
|
t.Fatalf("check roundrobin returned non-nil error: %v", err)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// First addr update contains grpclb.
|
||
|
|
func TestSwitchBalancerGRPCLBFirst(t *testing.T) {
|
||
|
|
defer leakcheck.Check(t)
|
||
|
|
r, rcleanup := manual.GenerateAndRegisterManualResolver()
|
||
|
|
defer rcleanup()
|
||
|
|
|
||
|
|
cc, err := Dial(r.Scheme()+":///test.server", WithInsecure(), WithCodec(testCodec{}))
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("failed to dial: %v", err)
|
||
|
|
}
|
||
|
|
defer cc.Close()
|
||
|
|
|
||
|
|
// ClientConn will switch balancer to grpclb when receives an address of
|
||
|
|
// type GRPCLB.
|
||
|
|
r.NewAddress([]resolver.Address{{Addr: "backend"}, {Addr: "grpclb", Type: resolver.GRPCLB}})
|
||
|
|
var isGRPCLB bool
|
||
|
|
for i := 0; i < 5000; i++ {
|
||
|
|
cc.mu.Lock()
|
||
|
|
isGRPCLB = cc.curBalancerName == "grpclb"
|
||
|
|
cc.mu.Unlock()
|
||
|
|
if isGRPCLB {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
time.Sleep(time.Millisecond)
|
||
|
|
}
|
||
|
|
if !isGRPCLB {
|
||
|
|
t.Fatalf("after 5 second, cc.balancer is of type %v, not grpclb", cc.curBalancerName)
|
||
|
|
}
|
||
|
|
|
||
|
|
// New update containing new backend and new grpclb. Should not switch
|
||
|
|
// balancer.
|
||
|
|
r.NewAddress([]resolver.Address{{Addr: "backend2"}, {Addr: "grpclb2", Type: resolver.GRPCLB}})
|
||
|
|
for i := 0; i < 200; i++ {
|
||
|
|
cc.mu.Lock()
|
||
|
|
isGRPCLB = cc.curBalancerName == "grpclb"
|
||
|
|
cc.mu.Unlock()
|
||
|
|
if !isGRPCLB {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
time.Sleep(time.Millisecond)
|
||
|
|
}
|
||
|
|
if !isGRPCLB {
|
||
|
|
t.Fatalf("within 200 ms, cc.balancer switched to !grpclb, want grpclb")
|
||
|
|
}
|
||
|
|
|
||
|
|
var isPickFirst bool
|
||
|
|
// Switch balancer to pickfirst.
|
||
|
|
r.NewAddress([]resolver.Address{{Addr: "backend"}})
|
||
|
|
for i := 0; i < 5000; i++ {
|
||
|
|
cc.mu.Lock()
|
||
|
|
isPickFirst = cc.curBalancerName == PickFirstBalancerName
|
||
|
|
cc.mu.Unlock()
|
||
|
|
if isPickFirst {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
time.Sleep(time.Millisecond)
|
||
|
|
}
|
||
|
|
if !isPickFirst {
|
||
|
|
t.Fatalf("after 5 second, cc.balancer is of type %v, not pick_first", cc.curBalancerName)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// First addr update does not contain grpclb.
|
||
|
|
func TestSwitchBalancerGRPCLBSecond(t *testing.T) {
|
||
|
|
defer leakcheck.Check(t)
|
||
|
|
r, rcleanup := manual.GenerateAndRegisterManualResolver()
|
||
|
|
defer rcleanup()
|
||
|
|
|
||
|
|
cc, err := Dial(r.Scheme()+":///test.server", WithInsecure(), WithCodec(testCodec{}))
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("failed to dial: %v", err)
|
||
|
|
}
|
||
|
|
defer cc.Close()
|
||
|
|
|
||
|
|
r.NewAddress([]resolver.Address{{Addr: "backend"}})
|
||
|
|
var isPickFirst bool
|
||
|
|
for i := 0; i < 5000; i++ {
|
||
|
|
cc.mu.Lock()
|
||
|
|
isPickFirst = cc.curBalancerName == PickFirstBalancerName
|
||
|
|
cc.mu.Unlock()
|
||
|
|
if isPickFirst {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
time.Sleep(time.Millisecond)
|
||
|
|
}
|
||
|
|
if !isPickFirst {
|
||
|
|
t.Fatalf("after 5 second, cc.balancer is of type %v, not pick_first", cc.curBalancerName)
|
||
|
|
}
|
||
|
|
|
||
|
|
// ClientConn will switch balancer to grpclb when receives an address of
|
||
|
|
// type GRPCLB.
|
||
|
|
r.NewAddress([]resolver.Address{{Addr: "backend"}, {Addr: "grpclb", Type: resolver.GRPCLB}})
|
||
|
|
var isGRPCLB bool
|
||
|
|
for i := 0; i < 5000; i++ {
|
||
|
|
cc.mu.Lock()
|
||
|
|
isGRPCLB = cc.curBalancerName == "grpclb"
|
||
|
|
cc.mu.Unlock()
|
||
|
|
if isGRPCLB {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
time.Sleep(time.Millisecond)
|
||
|
|
}
|
||
|
|
if !isGRPCLB {
|
||
|
|
t.Fatalf("after 5 second, cc.balancer is of type %v, not grpclb", cc.curBalancerName)
|
||
|
|
}
|
||
|
|
|
||
|
|
// New update containing new backend and new grpclb. Should not switch
|
||
|
|
// balancer.
|
||
|
|
r.NewAddress([]resolver.Address{{Addr: "backend2"}, {Addr: "grpclb2", Type: resolver.GRPCLB}})
|
||
|
|
for i := 0; i < 200; i++ {
|
||
|
|
cc.mu.Lock()
|
||
|
|
isGRPCLB = cc.curBalancerName == "grpclb"
|
||
|
|
cc.mu.Unlock()
|
||
|
|
if !isGRPCLB {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
time.Sleep(time.Millisecond)
|
||
|
|
}
|
||
|
|
if !isGRPCLB {
|
||
|
|
t.Fatalf("within 200 ms, cc.balancer switched to !grpclb, want grpclb")
|
||
|
|
}
|
||
|
|
|
||
|
|
// Switch balancer back.
|
||
|
|
r.NewAddress([]resolver.Address{{Addr: "backend"}})
|
||
|
|
for i := 0; i < 5000; i++ {
|
||
|
|
cc.mu.Lock()
|
||
|
|
isPickFirst = cc.curBalancerName == PickFirstBalancerName
|
||
|
|
cc.mu.Unlock()
|
||
|
|
if isPickFirst {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
time.Sleep(time.Millisecond)
|
||
|
|
}
|
||
|
|
if !isPickFirst {
|
||
|
|
t.Fatalf("after 5 second, cc.balancer is of type %v, not pick_first", cc.curBalancerName)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Test that if the current balancer is roundrobin, after switching to grpclb,
|
||
|
|
// when the resolved address doesn't contain grpclb addresses, balancer will be
|
||
|
|
// switched back to roundrobin.
|
||
|
|
func TestSwitchBalancerGRPCLBRoundRobin(t *testing.T) {
|
||
|
|
defer leakcheck.Check(t)
|
||
|
|
r, rcleanup := manual.GenerateAndRegisterManualResolver()
|
||
|
|
defer rcleanup()
|
||
|
|
|
||
|
|
cc, err := Dial(r.Scheme()+":///test.server", WithInsecure(), WithCodec(testCodec{}))
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("failed to dial: %v", err)
|
||
|
|
}
|
||
|
|
defer cc.Close()
|
||
|
|
|
||
|
|
r.NewServiceConfig(`{"loadBalancingPolicy": "round_robin"}`)
|
||
|
|
|
||
|
|
r.NewAddress([]resolver.Address{{Addr: "backend"}})
|
||
|
|
var isRoundRobin bool
|
||
|
|
for i := 0; i < 5000; i++ {
|
||
|
|
cc.mu.Lock()
|
||
|
|
isRoundRobin = cc.curBalancerName == "round_robin"
|
||
|
|
cc.mu.Unlock()
|
||
|
|
if isRoundRobin {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
time.Sleep(time.Millisecond)
|
||
|
|
}
|
||
|
|
if !isRoundRobin {
|
||
|
|
t.Fatalf("after 5 second, cc.balancer is of type %v, not round_robin", cc.curBalancerName)
|
||
|
|
}
|
||
|
|
|
||
|
|
// ClientConn will switch balancer to grpclb when receives an address of
|
||
|
|
// type GRPCLB.
|
||
|
|
r.NewAddress([]resolver.Address{{Addr: "grpclb", Type: resolver.GRPCLB}})
|
||
|
|
var isGRPCLB bool
|
||
|
|
for i := 0; i < 5000; i++ {
|
||
|
|
cc.mu.Lock()
|
||
|
|
isGRPCLB = cc.curBalancerName == "grpclb"
|
||
|
|
cc.mu.Unlock()
|
||
|
|
if isGRPCLB {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
time.Sleep(time.Millisecond)
|
||
|
|
}
|
||
|
|
if !isGRPCLB {
|
||
|
|
t.Fatalf("after 5 second, cc.balancer is of type %v, not grpclb", cc.curBalancerName)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Switch balancer back.
|
||
|
|
r.NewAddress([]resolver.Address{{Addr: "backend"}})
|
||
|
|
for i := 0; i < 5000; i++ {
|
||
|
|
cc.mu.Lock()
|
||
|
|
isRoundRobin = cc.curBalancerName == "round_robin"
|
||
|
|
cc.mu.Unlock()
|
||
|
|
if isRoundRobin {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
time.Sleep(time.Millisecond)
|
||
|
|
}
|
||
|
|
if !isRoundRobin {
|
||
|
|
t.Fatalf("after 5 second, cc.balancer is of type %v, not round_robin", cc.curBalancerName)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Test that if resolved address list contains grpclb, the balancer option in
|
||
|
|
// service config won't take effect. But when there's no grpclb address in a new
|
||
|
|
// resolved address list, balancer will be switched to the new one.
|
||
|
|
func TestSwitchBalancerGRPCLBServiceConfig(t *testing.T) {
|
||
|
|
defer leakcheck.Check(t)
|
||
|
|
r, rcleanup := manual.GenerateAndRegisterManualResolver()
|
||
|
|
defer rcleanup()
|
||
|
|
|
||
|
|
cc, err := Dial(r.Scheme()+":///test.server", WithInsecure(), WithCodec(testCodec{}))
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("failed to dial: %v", err)
|
||
|
|
}
|
||
|
|
defer cc.Close()
|
||
|
|
|
||
|
|
r.NewAddress([]resolver.Address{{Addr: "backend"}})
|
||
|
|
var isPickFirst bool
|
||
|
|
for i := 0; i < 5000; i++ {
|
||
|
|
cc.mu.Lock()
|
||
|
|
isPickFirst = cc.curBalancerName == PickFirstBalancerName
|
||
|
|
cc.mu.Unlock()
|
||
|
|
if isPickFirst {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
time.Sleep(time.Millisecond)
|
||
|
|
}
|
||
|
|
if !isPickFirst {
|
||
|
|
t.Fatalf("after 5 second, cc.balancer is of type %v, not pick_first", cc.curBalancerName)
|
||
|
|
}
|
||
|
|
|
||
|
|
// ClientConn will switch balancer to grpclb when receives an address of
|
||
|
|
// type GRPCLB.
|
||
|
|
r.NewAddress([]resolver.Address{{Addr: "grpclb", Type: resolver.GRPCLB}})
|
||
|
|
var isGRPCLB bool
|
||
|
|
for i := 0; i < 5000; i++ {
|
||
|
|
cc.mu.Lock()
|
||
|
|
isGRPCLB = cc.curBalancerName == "grpclb"
|
||
|
|
cc.mu.Unlock()
|
||
|
|
if isGRPCLB {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
time.Sleep(time.Millisecond)
|
||
|
|
}
|
||
|
|
if !isGRPCLB {
|
||
|
|
t.Fatalf("after 5 second, cc.balancer is of type %v, not grpclb", cc.curBalancerName)
|
||
|
|
}
|
||
|
|
|
||
|
|
r.NewServiceConfig(`{"loadBalancingPolicy": "round_robin"}`)
|
||
|
|
var isRoundRobin bool
|
||
|
|
for i := 0; i < 200; i++ {
|
||
|
|
cc.mu.Lock()
|
||
|
|
isRoundRobin = cc.curBalancerName == "round_robin"
|
||
|
|
cc.mu.Unlock()
|
||
|
|
if isRoundRobin {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
time.Sleep(time.Millisecond)
|
||
|
|
}
|
||
|
|
// Balancer should NOT switch to round_robin because resolved list contains
|
||
|
|
// grpclb.
|
||
|
|
if isRoundRobin {
|
||
|
|
t.Fatalf("within 200 ms, cc.balancer switched to round_robin, want grpclb")
|
||
|
|
}
|
||
|
|
|
||
|
|
// Switch balancer back.
|
||
|
|
r.NewAddress([]resolver.Address{{Addr: "backend"}})
|
||
|
|
for i := 0; i < 5000; i++ {
|
||
|
|
cc.mu.Lock()
|
||
|
|
isRoundRobin = cc.curBalancerName == "round_robin"
|
||
|
|
cc.mu.Unlock()
|
||
|
|
if isRoundRobin {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
time.Sleep(time.Millisecond)
|
||
|
|
}
|
||
|
|
if !isRoundRobin {
|
||
|
|
t.Fatalf("after 5 second, cc.balancer is of type %v, not round_robin", cc.curBalancerName)
|
||
|
|
}
|
||
|
|
}
|