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xdsclient: NACK endpoint resources with zero weight #5560

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merged 1 commit into from Aug 3, 2022
Merged

xdsclient: NACK endpoint resources with zero weight #5560

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1 change: 1 addition & 0 deletions internal/testutils/xds/e2e/clientresources.go
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Expand Up @@ -370,6 +370,7 @@ func DefaultEndpoint(clusterName string, host string, ports []uint32) *v3endpoin
PortSpecifier: &v3corepb.SocketAddress_PortValue{PortValue: port}},
}},
}},
LoadBalancingWeight: &wrapperspb.UInt32Value{Value: 1},
})
}
return &v3endpointpb.ClusterLoadAssignment{
Expand Down
3 changes: 3 additions & 0 deletions xds/internal/testutils/protos.go
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Expand Up @@ -118,6 +118,9 @@ func (clab *ClusterLoadAssignmentBuilder) AddLocality(subzone string, weight uin
lbe.LoadBalancingWeight = &wrapperspb.UInt32Value{Value: opts.Weight[i]}
}
}
if lbe.LoadBalancingWeight == nil {
lbe.LoadBalancingWeight = &wrapperspb.UInt32Value{Value: 1}
}
lbEndPoints = append(lbEndPoints, lbe)
}

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6 changes: 3 additions & 3 deletions xds/internal/xdsclient/controller/v2_eds_test.go
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Expand Up @@ -117,7 +117,7 @@ func (s) TestEDSHandleResponse(t *testing.T) {
"not-goodEDSName": {Update: xdsresource.EndpointsUpdate{
Localities: []xdsresource.Locality{
{
Endpoints: []xdsresource.Endpoint{{Address: "addr1:314"}},
Endpoints: []xdsresource.Endpoint{{Address: "addr1:314", Weight: 1}},
ID: internal.LocalityID{SubZone: "locality-1"},
Priority: 0,
Weight: 1,
Expand All @@ -140,13 +140,13 @@ func (s) TestEDSHandleResponse(t *testing.T) {
goodEDSName: {Update: xdsresource.EndpointsUpdate{
Localities: []xdsresource.Locality{
{
Endpoints: []xdsresource.Endpoint{{Address: "addr1:314"}},
Endpoints: []xdsresource.Endpoint{{Address: "addr1:314", Weight: 1}},
ID: internal.LocalityID{SubZone: "locality-1"},
Priority: 1,
Weight: 1,
},
{
Endpoints: []xdsresource.Endpoint{{Address: "addr2:159"}},
Endpoints: []xdsresource.Endpoint{{Address: "addr2:159", Weight: 1}},
ID: internal.LocalityID{SubZone: "locality-2"},
Priority: 0,
Weight: 1,
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16 changes: 12 additions & 4 deletions xds/internal/xdsclient/xdsresource/unmarshal_eds.go
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Expand Up @@ -90,16 +90,20 @@ func parseDropPolicy(dropPolicy *v3endpointpb.ClusterLoadAssignment_Policy_DropO
}
}

func parseEndpoints(lbEndpoints []*v3endpointpb.LbEndpoint) []Endpoint {
func parseEndpoints(lbEndpoints []*v3endpointpb.LbEndpoint) ([]Endpoint, error) {
endpoints := make([]Endpoint, 0, len(lbEndpoints))
for _, lbEndpoint := range lbEndpoints {
weight := lbEndpoint.GetLoadBalancingWeight().GetValue()
if weight == 0 {
return nil, fmt.Errorf("EDS response contains an endpoint with zero weight: %+v", lbEndpoint)
}
endpoints = append(endpoints, Endpoint{
HealthStatus: EndpointHealthStatus(lbEndpoint.GetHealthStatus()),
Address: parseAddress(lbEndpoint.GetEndpoint().GetAddress().GetSocketAddress()),
Weight: lbEndpoint.GetLoadBalancingWeight().GetValue(),
Weight: weight,
})
}
return endpoints
return endpoints, nil
}

func parseEDSRespProto(m *v3endpointpb.ClusterLoadAssignment, logger *grpclog.PrefixLogger) (EndpointsUpdate, error) {
Expand Down Expand Up @@ -134,9 +138,13 @@ func parseEDSRespProto(m *v3endpointpb.ClusterLoadAssignment, logger *grpclog.Pr
return EndpointsUpdate{}, fmt.Errorf("duplicate locality %s with the same priority %v", lidStr, priority)
}
localitiesWithPriority[lidStr] = true
endpoints, err := parseEndpoints(locality.GetLbEndpoints())
if err != nil {
return EndpointsUpdate{}, err
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Please wrap this err with more information (see other errors in this function).

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parseEndpoints returns an error which has all the required information.

}
ret.Localities = append(ret.Localities, Locality{
ID: lid,
Endpoints: parseEndpoints(locality.GetLbEndpoints()),
Endpoints: endpoints,
Weight: locality.GetLoadBalancingWeight().GetValue(),
Priority: priority,
})
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10 changes: 10 additions & 0 deletions xds/internal/xdsclient/xdsresource/unmarshal_eds_test.go
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Expand Up @@ -64,6 +64,16 @@ func (s) TestEDSParseRespProto(t *testing.T) {
want: EndpointsUpdate{},
wantErr: true,
},
{
name: "zero-endpoint-weight",
m: func() *v3endpointpb.ClusterLoadAssignment {
clab0 := newClaBuilder("test", nil)
clab0.addLocality("locality-0", 1, 0, []string{"addr1:314"}, &addLocalityOptions{Weight: []uint32{0}})
return clab0.Build()
}(),
want: EndpointsUpdate{},
wantErr: true,
},
{
name: "duplicate-locality-in-the-same-priority",
m: func() *v3endpointpb.ClusterLoadAssignment {
Expand Down