| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package k8ssd |
| 4 | |
| 5 | import ( |
| 6 | "fmt" |
| 7 | "os" |
| 8 | "testing" |
| 9 | |
| 10 | "github.com/netdata/netdata/go/plugins/plugin/agent/discovery/sd/model" |
| 11 | "github.com/netdata/netdata/go/plugins/plugin/go.d/pkg/k8sclient" |
| 12 | |
| 13 | "github.com/stretchr/testify/assert" |
| 14 | corev1 "k8s.io/api/core/v1" |
| 15 | metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" |
| 16 | "k8s.io/apimachinery/pkg/runtime" |
| 17 | "k8s.io/client-go/kubernetes" |
| 18 | "k8s.io/client-go/kubernetes/fake" |
| 19 | ) |
| 20 | |
| 21 | func TestMain(m *testing.M) { |
| 22 | _ = os.Setenv(envNodeName, "m01") |
| 23 | _ = os.Setenv(k8sclient.EnvFakeClient, "true") |
| 24 | code := m.Run() |
| 25 | _ = os.Unsetenv(envNodeName) |
| 26 | _ = os.Unsetenv(k8sclient.EnvFakeClient) |
| 27 | os.Exit(code) |
| 28 | } |
| 29 | |
| 30 | func TestNewKubeDiscoverer(t *testing.T) { |
| 31 | tests := map[string]struct { |
| 32 | cfg Config |
| 33 | wantErr bool |
| 34 | }{ |
| 35 | "pod role config": { |
| 36 | wantErr: false, |
| 37 | cfg: Config{Role: string(rolePod)}, |
| 38 | }, |
| 39 | "service role config": { |
| 40 | wantErr: false, |
| 41 | cfg: Config{Role: string(roleService)}, |
| 42 | }, |
| 43 | "empty config": { |
| 44 | wantErr: true, |
| 45 | cfg: Config{}, |
| 46 | }, |
| 47 | } |
| 48 | for name, test := range tests { |
| 49 | t.Run(name, func(t *testing.T) { |
| 50 | disc, err := NewDiscoverer(test.cfg) |
| 51 | |
| 52 | if test.wantErr { |
| 53 | assert.Error(t, err) |
| 54 | assert.Nil(t, disc) |
| 55 | } else { |
| 56 | assert.NoError(t, err) |
| 57 | assert.NotNil(t, disc) |
| 58 | } |
| 59 | }) |
| 60 | } |
| 61 | } |
| 62 | |
| 63 | func TestKubeDiscoverer_Discover(t *testing.T) { |
| 64 | const prod = "prod" |
| 65 | const dev = "dev" |
| 66 | prodNamespace := newNamespace(prod) |
| 67 | devNamespace := newNamespace(dev) |
| 68 | |
| 69 | tests := map[string]struct { |
| 70 | createSim func() discoverySim |
| 71 | }{ |
| 72 | "multiple namespaces pod td": { |
| 73 | createSim: func() discoverySim { |
| 74 | httpdProd, nginxProd := newHTTPDPod(), newNGINXPod() |
| 75 | httpdProd.Namespace = prod |
| 76 | nginxProd.Namespace = prod |
| 77 | |
| 78 | httpdDev, nginxDev := newHTTPDPod(), newNGINXPod() |
| 79 | httpdDev.Namespace = dev |
| 80 | nginxDev.Namespace = dev |
| 81 | |
| 82 | disc, _ := preparePodDiscoverer( |
| 83 | []string{prod, dev}, |
| 84 | prodNamespace, devNamespace, httpdProd, nginxProd, httpdDev, nginxDev) |
| 85 | |
| 86 | return discoverySim{ |
| 87 | td: disc, |
| 88 | sortBeforeVerify: true, |
| 89 | wantTargetGroups: []model.TargetGroup{ |
| 90 | preparePodTargetGroup(httpdDev), |
| 91 | preparePodTargetGroup(nginxDev), |
| 92 | preparePodTargetGroup(httpdProd), |
| 93 | preparePodTargetGroup(nginxProd), |
| 94 | }, |
| 95 | } |
| 96 | }, |
| 97 | }, |
| 98 | "multiple namespaces ClusterIP service td": { |
| 99 | createSim: func() discoverySim { |
| 100 | httpdProd, nginxProd := newHTTPDClusterIPService(), newNGINXClusterIPService() |
| 101 | httpdProd.Namespace = prod |
| 102 | nginxProd.Namespace = prod |
| 103 | |
| 104 | httpdDev, nginxDev := newHTTPDClusterIPService(), newNGINXClusterIPService() |
| 105 | httpdDev.Namespace = dev |
| 106 | nginxDev.Namespace = dev |
| 107 | |
| 108 | disc, _ := prepareSvcDiscoverer( |
| 109 | []string{prod, dev}, |
| 110 | prodNamespace, devNamespace, httpdProd, nginxProd, httpdDev, nginxDev) |
| 111 | |
| 112 | return discoverySim{ |
| 113 | td: disc, |
| 114 | sortBeforeVerify: true, |
| 115 | wantTargetGroups: []model.TargetGroup{ |
| 116 | prepareSvcTargetGroup(httpdDev), |
| 117 | prepareSvcTargetGroup(nginxDev), |
| 118 | prepareSvcTargetGroup(httpdProd), |
| 119 | prepareSvcTargetGroup(nginxProd), |
| 120 | }, |
| 121 | } |
| 122 | }, |
| 123 | }, |
| 124 | } |
| 125 | |
| 126 | for name, test := range tests { |
| 127 | t.Run(name, func(t *testing.T) { |
| 128 | sim := test.createSim() |
| 129 | sim.run(t) |
| 130 | }) |
| 131 | } |
| 132 | } |
| 133 | |
| 134 | func prepareDiscoverer(role role, namespaces []string, objects ...runtime.Object) (*KubeDiscoverer, kubernetes.Interface) { |
| 135 | client := fake.NewClientset(objects...) |
| 136 | disc := &KubeDiscoverer{ |
| 137 | cfgSource: "test=test", |
| 138 | role: role, |
| 139 | namespaces: namespaces, |
| 140 | client: client, |
| 141 | discoverers: nil, |
| 142 | started: make(chan struct{}), |
| 143 | } |
| 144 | return disc, client |
| 145 | } |
| 146 | |
| 147 | func newNamespace(name string) *corev1.Namespace { |
| 148 | return &corev1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: name}} |
| 149 | } |
| 150 | |
| 151 | func mustCalcHash(obj any) uint64 { |
| 152 | hash, err := model.CalcHash(obj) |
| 153 | if err != nil { |
| 154 | panic(fmt.Sprintf("hash calculation: %v", err)) |
| 155 | } |
| 156 | return hash |
| 157 | } |