xds: move balancergroup and weightedtarget our of xds directory (grpc…

…#4966)
cl1111 · Nov 9, 2021 · 714ba8d · 714ba8d
1 parent 14ebd91
commit 714ba8d
Show file tree

Hide file tree

Showing 34 changed files with 1,867 additions and 1,372 deletions.
diff --git a/...ternal/balancer/weightedtarget/logging.go → balancer/weightedtarget/logging.go b/...ternal/balancer/weightedtarget/logging.go → balancer/weightedtarget/logging.go
diff --git a/...edtarget/weightedaggregator/aggregator.go → ...edtarget/weightedaggregator/aggregator.go b/...edtarget/weightedaggregator/aggregator.go → ...edtarget/weightedaggregator/aggregator.go
diff --git a/...balancer/weightedtarget/weightedtarget.go → balancer/weightedtarget/weightedtarget.go b/...balancer/weightedtarget/weightedtarget.go → balancer/weightedtarget/weightedtarget.go
@@ -17,21 +17,23 @@
  */
 
 // Package weightedtarget implements the weighted_target balancer.
+//
+// All APIs in this package are experimental.
 package weightedtarget
 
 import (
 	"encoding/json"
 	"fmt"
 
 	"google.golang.org/grpc/balancer"
+	"google.golang.org/grpc/balancer/weightedtarget/weightedaggregator"
+	"google.golang.org/grpc/internal/balancergroup"
 	"google.golang.org/grpc/internal/grpclog"
 	"google.golang.org/grpc/internal/hierarchy"
 	"google.golang.org/grpc/internal/pretty"
 	"google.golang.org/grpc/internal/wrr"
 	"google.golang.org/grpc/resolver"
 	"google.golang.org/grpc/serviceconfig"
-	"google.golang.org/grpc/xds/internal/balancer/balancergroup"
-	"google.golang.org/grpc/xds/internal/balancer/weightedtarget/weightedaggregator"
 )
 
 // Name is the name of the weighted_target balancer.
@@ -69,11 +71,6 @@ func (bb) ParseConfig(c json.RawMessage) (serviceconfig.LoadBalancingConfig, err
 type weightedTargetBalancer struct {
 	logger *grpclog.PrefixLogger
 
-	// TODO: Make this package not dependent on any xds specific code.
-	// BalancerGroup uses xdsinternal.LocalityID as the key in the map of child
-	// policies that it maintains and reports load using LRS. Once these two
-	// dependencies are removed from the balancerGroup, this package will not
-	// have any dependencies on xds code.
 	bg              *balancergroup.BalancerGroup
 	stateAggregator *weightedaggregator.Aggregator
 

diff --git a/...r/weightedtarget/weightedtarget_config.go → ...r/weightedtarget/weightedtarget_config.go b/...r/weightedtarget/weightedtarget_config.go → ...r/weightedtarget/weightedtarget_config.go
diff --git a/...ghtedtarget/weightedtarget_config_test.go → ...ghtedtarget/weightedtarget_config_test.go b/...ghtedtarget/weightedtarget_config_test.go → ...ghtedtarget/weightedtarget_config_test.go
@@ -23,34 +23,38 @@ import (
 
 	"github.com/google/go-cmp/cmp"
 	"google.golang.org/grpc/balancer"
+	_ "google.golang.org/grpc/balancer/grpclb"
+	"google.golang.org/grpc/balancer/roundrobin"
 	internalserviceconfig "google.golang.org/grpc/internal/serviceconfig"
-	"google.golang.org/grpc/xds/internal/balancer/priority"
 )
 
 const (
 	testJSONConfig = `{
   "targets": {
-	"cluster_1" : {
-	  "weight":75,
-	  "childPolicy":[{"priority_experimental":{"priorities": ["child-1"], "children": {"child-1": {"config": [{"round_robin":{}}]}}}}]
+	"cluster_1": {
+	  "weight": 75,
+	  "childPolicy": [{
+        "grpclb": {
+          "childPolicy": [{"pick_first":{}}],
+          "targetName": "foo-service"
+        }
+      }]
 	},
-	"cluster_2" : {
-	  "weight":25,
-	  "childPolicy":[{"priority_experimental":{"priorities": ["child-2"], "children": {"child-2": {"config": [{"round_robin":{}}]}}}}]
+	"cluster_2": {
+	  "weight": 25,
+	  "childPolicy": [{"round_robin": ""}]
 	}
   }
 }`
 )
 
 var (
-	testConfigParser = balancer.Get(priority.Name).(balancer.ConfigParser)
-	testConfigJSON1  = `{"priorities": ["child-1"], "children": {"child-1": {"config": [{"round_robin":{}}]}}}`
-	testConfig1, _   = testConfigParser.ParseConfig([]byte(testConfigJSON1))
-	testConfigJSON2  = `{"priorities": ["child-2"], "children": {"child-2": {"config": [{"round_robin":{}}]}}}`
-	testConfig2, _   = testConfigParser.ParseConfig([]byte(testConfigJSON2))
+	grpclbConfigParser = balancer.Get("grpclb").(balancer.ConfigParser)
+	grpclbConfigJSON   = `{"childPolicy": [{"pick_first":{}}], "targetName": "foo-service"}`
+	grpclbConfig, _    = grpclbConfigParser.ParseConfig([]byte(grpclbConfigJSON))
 )
 
-func Test_parseConfig(t *testing.T) {
+func (s) TestParseConfig(t *testing.T) {
 	tests := []struct {
 		name    string
 		js      string
@@ -71,15 +75,14 @@ func Test_parseConfig(t *testing.T) {
 					"cluster_1": {
 						Weight: 75,
 						ChildPolicy: &internalserviceconfig.BalancerConfig{
-							Name:   priority.Name,
-							Config: testConfig1,
+							Name:   "grpclb",
+							Config: grpclbConfig,
 						},
 					},
 					"cluster_2": {
 						Weight: 25,
 						ChildPolicy: &internalserviceconfig.BalancerConfig{
-							Name:   priority.Name,
-							Config: testConfig2,
+							Name: roundrobin.Name,
 						},
 					},
 				},
@@ -91,8 +94,7 @@ func Test_parseConfig(t *testing.T) {
 		t.Run(tt.name, func(t *testing.T) {
 			got, err := parseConfig([]byte(tt.js))
 			if (err != nil) != tt.wantErr {
-				t.Errorf("parseConfig() error = %v, wantErr %v", err, tt.wantErr)
-				return
+				t.Fatalf("parseConfig() error = %v, wantErr %v", err, tt.wantErr)
 			}
 			if !cmp.Equal(got, tt.want) {
 				t.Errorf("parseConfig() got unexpected result, diff: %v", cmp.Diff(got, tt.want))