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Improve reliability of Kubernetes SD tests (#10761) 

The tests for Kubernetes SD rely on comparing target groups by first
serializing them to JSON. However, the target group MarshalJSON function
only serializes the __address__ label, which makes eliminates all other
labels from the comparison.

This commit implements a separate marshaling function intended for use in
Kubernetes SD tests. The function serializes all target labels, making
comparisons much more reliable. The commit also fixes all tests that
started to fail due to the newly introduced change.

Signed-off-by: Filip Petkovski <filip.petkovsky@gmail.com>
This commit is contained in:
Filip Petkovski 2022-06-07 17:19:40 +02:00 committed by GitHub
parent a56731126d
commit 7a78897d0b
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 54 additions and 14 deletions
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48
discovery/kubernetes/endpointslice_test.go
View File

@ -644,10 +644,16 @@ func TestEndpointSliceDiscoveryWithServiceUpdate(t *testing.T) {
Targets: []model.LabelSet{
{
"__address__": "1.2.3.4:9000",
"__meta_kubernetes_endpointslice_endpoint_hostname": "testendpoint1",
"__meta_kubernetes_endpointslice_port": "9000",
"__meta_kubernetes_endpointslice_port_name": "testport",
"__meta_kubernetes_endpointslice_port_protocol": "TCP",
"__meta_kubernetes_endpointslice_address_target_kind": "",
"__meta_kubernetes_endpointslice_address_target_name": "",
"__meta_kubernetes_endpointslice_endpoint_conditions_ready": "true",
"__meta_kubernetes_endpointslice_endpoint_hostname": "testendpoint1",
"__meta_kubernetes_endpointslice_endpoint_topology_present_topology": "true",
"__meta_kubernetes_endpointslice_endpoint_topology_topology": "value",
"__meta_kubernetes_endpointslice_port": "9000",
"__meta_kubernetes_endpointslice_port_app_protocol": "http",
"__meta_kubernetes_endpointslice_port_name": "testport",
"__meta_kubernetes_endpointslice_port_protocol": "TCP",
},
{
"__address__": "2.3.4.5:9000",
@ -655,6 +661,7 @@ func TestEndpointSliceDiscoveryWithServiceUpdate(t *testing.T) {
"__meta_kubernetes_endpointslice_port": "9000",
"__meta_kubernetes_endpointslice_port_name": "testport",
"__meta_kubernetes_endpointslice_port_protocol": "TCP",
"__meta_kubernetes_endpointslice_port_app_protocol": "http",
},
{
"__address__": "3.4.5.6:9000",
@ -662,6 +669,7 @@ func TestEndpointSliceDiscoveryWithServiceUpdate(t *testing.T) {
"__meta_kubernetes_endpointslice_port": "9000",
"__meta_kubernetes_endpointslice_port_name": "testport",
"__meta_kubernetes_endpointslice_port_protocol": "TCP",
"__meta_kubernetes_endpointslice_port_app_protocol": "http",
},
},
Labels: model.LabelSet{
@ -755,10 +763,16 @@ func TestEndpointSliceDiscoveryNamespaces(t *testing.T) {
Targets: []model.LabelSet{
{
"__address__": "1.2.3.4:9000",
"__meta_kubernetes_endpointslice_endpoint_hostname": "testendpoint1",
"__meta_kubernetes_endpointslice_port": "9000",
"__meta_kubernetes_endpointslice_port_name": "testport",
"__meta_kubernetes_endpointslice_port_protocol": "TCP",
"__meta_kubernetes_endpointslice_address_target_kind": "",
"__meta_kubernetes_endpointslice_address_target_name": "",
"__meta_kubernetes_endpointslice_endpoint_conditions_ready": "true",
"__meta_kubernetes_endpointslice_endpoint_hostname": "testendpoint1",
"__meta_kubernetes_endpointslice_endpoint_topology_present_topology": "true",
"__meta_kubernetes_endpointslice_endpoint_topology_topology": "value",
"__meta_kubernetes_endpointslice_port": "9000",
"__meta_kubernetes_endpointslice_port_app_protocol": "http",
"__meta_kubernetes_endpointslice_port_name": "testport",
"__meta_kubernetes_endpointslice_port_protocol": "TCP",
},
{
"__address__": "2.3.4.5:9000",
@ -766,6 +780,7 @@ func TestEndpointSliceDiscoveryNamespaces(t *testing.T) {
"__meta_kubernetes_endpointslice_port": "9000",
"__meta_kubernetes_endpointslice_port_name": "testport",
"__meta_kubernetes_endpointslice_port_protocol": "TCP",
"__meta_kubernetes_endpointslice_port_app_protocol": "http",
},
{
"__address__": "3.4.5.6:9000",
@ -773,6 +788,7 @@ func TestEndpointSliceDiscoveryNamespaces(t *testing.T) {
"__meta_kubernetes_endpointslice_port": "9000",
"__meta_kubernetes_endpointslice_port_name": "testport",
"__meta_kubernetes_endpointslice_port_protocol": "TCP",
"__meta_kubernetes_endpointslice_port_app_protocol": "http",
},
},
Labels: model.LabelSet{
@ -871,10 +887,16 @@ func TestEndpointSliceDiscoveryOwnNamespace(t *testing.T) {
Targets: []model.LabelSet{
{
"__address__": "1.2.3.4:9000",
"__meta_kubernetes_endpointslice_endpoint_hostname": "testendpoint1",
"__meta_kubernetes_endpointslice_port": "9000",
"__meta_kubernetes_endpointslice_port_name": "testport",
"__meta_kubernetes_endpointslice_port_protocol": "TCP",
"__meta_kubernetes_endpointslice_address_target_kind": "",
"__meta_kubernetes_endpointslice_address_target_name": "",
"__meta_kubernetes_endpointslice_endpoint_conditions_ready": "true",
"__meta_kubernetes_endpointslice_endpoint_hostname": "testendpoint1",
"__meta_kubernetes_endpointslice_endpoint_topology_present_topology": "true",
"__meta_kubernetes_endpointslice_endpoint_topology_topology": "value",
"__meta_kubernetes_endpointslice_port": "9000",
"__meta_kubernetes_endpointslice_port_app_protocol": "http",
"__meta_kubernetes_endpointslice_port_name": "testport",
"__meta_kubernetes_endpointslice_port_protocol": "TCP",
},
{
"__address__": "2.3.4.5:9000",
@ -882,6 +904,7 @@ func TestEndpointSliceDiscoveryOwnNamespace(t *testing.T) {
"__meta_kubernetes_endpointslice_port": "9000",
"__meta_kubernetes_endpointslice_port_name": "testport",
"__meta_kubernetes_endpointslice_port_protocol": "TCP",
"__meta_kubernetes_endpointslice_port_app_protocol": "http",
},
{
"__address__": "3.4.5.6:9000",
@ -889,6 +912,7 @@ func TestEndpointSliceDiscoveryOwnNamespace(t *testing.T) {
"__meta_kubernetes_endpointslice_port": "9000",
"__meta_kubernetes_endpointslice_port_name": "testport",
"__meta_kubernetes_endpointslice_port_protocol": "TCP",
"__meta_kubernetes_endpointslice_port_app_protocol": "http",
},
},
Labels: model.LabelSet{

20
discovery/kubernetes/kubernetes_test.go
View File

@ -163,11 +163,11 @@ Loop:
func requireTargetGroups(t *testing.T, expected, res map[string]*targetgroup.Group) {
t.Helper()
b1, err := json.Marshal(expected)
b1, err := marshalTargetGroups(expected)
if err != nil {
panic(err)
}
b2, err := json.Marshal(res)
b2, err := marshalTargetGroups(res)
if err != nil {
panic(err)
}
@ -175,6 +175,22 @@ func requireTargetGroups(t *testing.T, expected, res map[string]*targetgroup.Gro
require.Equal(t, string(b1), string(b2))
}
// marshalTargetGroups serializes a set of target groups to JSON, ignoring the
// custom MarshalJSON function defined on the targetgroup.Group struct.
// marshalTargetGroups can be used for making exact comparisons between target groups
// as it will serialize all target labels.
func marshalTargetGroups(tgs map[string]*targetgroup.Group) ([]byte, error) {
type targetGroupAlias targetgroup.Group
aliases := make(map[string]*targetGroupAlias, len(tgs))
for k, v := range tgs {
tg := targetGroupAlias(*v)
aliases[k] = &tg
}
return json.Marshal(aliases)
}
type hasSynced interface {
// hasSynced returns true if all informers synced.
// This is only used in testing to determine when discoverer synced to