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proxier: simplify toplogy FilterLocalEndpoint function

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Signed-off-by: Andrew Sy Kim <kim.andrewsy@gmail.com>
This commit is contained in:
Andrew Sy Kim 2021-03-10 21:36:31 -05:00
parent 7ed2ed1b45
commit be92fc83e2
2 changed files with 26 additions and 83 deletions
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20
pkg/proxy/topology.go
View File

@ -32,7 +32,7 @@ func FilterEndpoints(endpoints []Endpoint, svcInfo ServicePort, nodeLabels map[s
}
if utilfeature.DefaultFeatureGate.Enabled(features.ServiceInternalTrafficPolicy) && svcInfo.NodeLocalInternal() {
return filterEndpointsInternalTrafficPolicy(svcInfo.InternalTrafficPolicy(), endpoints)
return FilterLocalEndpoint(endpoints)
}
if utilfeature.DefaultFeatureGate.Enabled(features.TopologyAwareHints) {
@ -85,20 +85,8 @@ func filterEndpointsWithHints(endpoints []Endpoint, hintsAnnotation string, node
return filteredEndpoints
}
// filterEndpointsInternalTrafficPolicy returns the node local endpoints based
// on configured InternalTrafficPolicy.
//
// If ServiceInternalTrafficPolicy feature gate is off, returns the original
// EndpointSlice.
// Otherwise, if InternalTrafficPolicy is Local, only return the node local endpoints.
func filterEndpointsInternalTrafficPolicy(internalTrafficPolicy *v1.ServiceInternalTrafficPolicyType, endpoints []Endpoint) []Endpoint {
if !utilfeature.DefaultFeatureGate.Enabled(features.ServiceInternalTrafficPolicy) {
return endpoints
}
if internalTrafficPolicy == nil || *internalTrafficPolicy == v1.ServiceInternalTrafficPolicyCluster {
return endpoints
}
// FilterLocalEndpoint returns the node local endpoints
func FilterLocalEndpoint(endpoints []Endpoint) []Endpoint {
var filteredEndpoints []Endpoint
// Get all the local endpoints
@ -108,7 +96,5 @@ func filterEndpointsInternalTrafficPolicy(internalTrafficPolicy *v1.ServiceInter
}
}
// When internalTrafficPolicy is Local, only return the node local
// endpoints
return filteredEndpoints
}

89
pkg/proxy/topology_test.go
View File

@ -335,93 +335,50 @@ func Test_filterEndpointsWithHints(t *testing.T) {
}
}
func Test_filterEndpointsInternalTrafficPolicy(t *testing.T) {
cluster := v1.ServiceInternalTrafficPolicyCluster
local := v1.ServiceInternalTrafficPolicyLocal
func TestFilterLocalEndpoint(t *testing.T) {
testCases := []struct {
name string
internalTrafficPolicy *v1.ServiceInternalTrafficPolicyType
endpoints []Endpoint
expected []Endpoint
featureGateOn bool
name string
endpoints []Endpoint
expected []Endpoint
}{
{
name: "no internalTrafficPolicy with empty endpoints",
internalTrafficPolicy: nil,
endpoints: []Endpoint{},
expected: []Endpoint{},
featureGateOn: true,
name: "with empty endpoints",
endpoints: []Endpoint{},
expected: nil,
},
{
name: "no internalTrafficPolicy with non-empty endpoints",
internalTrafficPolicy: nil,
endpoints: []Endpoint{
&BaseEndpointInfo{Endpoint: "10.0.0.0:80", IsLocal: true},
&BaseEndpointInfo{Endpoint: "10.0.0.1:80", IsLocal: false},
},
expected: []Endpoint{
&BaseEndpointInfo{Endpoint: "10.0.0.0:80", IsLocal: true},
&BaseEndpointInfo{Endpoint: "10.0.0.1:80", IsLocal: false},
},
featureGateOn: true,
},
{
name: "internalTrafficPolicy is cluster",
internalTrafficPolicy: &cluster,
endpoints: []Endpoint{
&BaseEndpointInfo{Endpoint: "10.0.0.0:80", IsLocal: true},
&BaseEndpointInfo{Endpoint: "10.0.0.1:80", IsLocal: false},
},
expected: []Endpoint{
&BaseEndpointInfo{Endpoint: "10.0.0.0:80", IsLocal: true},
&BaseEndpointInfo{Endpoint: "10.0.0.1:80", IsLocal: false},
},
featureGateOn: true,
},
{
name: "internalTrafficPolicy is local with non-zero local endpoints",
internalTrafficPolicy: &local,
endpoints: []Endpoint{
&BaseEndpointInfo{Endpoint: "10.0.0.0:80", IsLocal: true},
&BaseEndpointInfo{Endpoint: "10.0.0.1:80", IsLocal: false},
},
expected: []Endpoint{
&BaseEndpointInfo{Endpoint: "10.0.0.0:80", IsLocal: true},
},
featureGateOn: true,
},
{
name: "internalTrafficPolicy is local with zero local endpoints",
internalTrafficPolicy: &local,
name: "all endpoints not local",
endpoints: []Endpoint{
&BaseEndpointInfo{Endpoint: "10.0.0.0:80", IsLocal: false},
&BaseEndpointInfo{Endpoint: "10.0.0.1:80", IsLocal: false},
&BaseEndpointInfo{Endpoint: "10.0.0.2:80", IsLocal: false},
},
expected: nil,
featureGateOn: true,
expected: nil,
},
{
name: "feature gate is off, internalTrafficPolicy is local with non-empty endpoints",
internalTrafficPolicy: &local,
name: "all endpoints are local",
endpoints: []Endpoint{
&BaseEndpointInfo{Endpoint: "10.0.0.0:80", IsLocal: true},
&BaseEndpointInfo{Endpoint: "10.0.0.1:80", IsLocal: false},
&BaseEndpointInfo{Endpoint: "10.0.0.2:80", IsLocal: false},
&BaseEndpointInfo{Endpoint: "10.0.0.1:80", IsLocal: true},
},
expected: []Endpoint{
&BaseEndpointInfo{Endpoint: "10.0.0.0:80", IsLocal: true},
&BaseEndpointInfo{Endpoint: "10.0.0.1:80", IsLocal: true},
},
},
{
name: "some endpoints are local",
endpoints: []Endpoint{
&BaseEndpointInfo{Endpoint: "10.0.0.0:80", IsLocal: true},
&BaseEndpointInfo{Endpoint: "10.0.0.1:80", IsLocal: false},
},
expected: []Endpoint{
&BaseEndpointInfo{Endpoint: "10.0.0.0:80", IsLocal: true},
&BaseEndpointInfo{Endpoint: "10.0.0.1:80", IsLocal: false},
&BaseEndpointInfo{Endpoint: "10.0.0.2:80", IsLocal: false},
},
featureGateOn: false,
},
}
for _, tc := range testCases {
defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.ServiceInternalTrafficPolicy, tc.featureGateOn)()
t.Run(tc.name, func(t *testing.T) {
filteredEndpoint := filterEndpointsInternalTrafficPolicy(tc.internalTrafficPolicy, tc.endpoints)
filteredEndpoint := FilterLocalEndpoint(tc.endpoints)
if !reflect.DeepEqual(filteredEndpoint, tc.expected) {
t.Errorf("expected %v, got %v", tc.expected, filteredEndpoint)
}