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// SPDX-License-Identifier: GPL-3.0-or-later
package kubernetes
import (
"fmt"
"os"
"testing"
"github.com/netdata/netdata/go/plugins/plugin/go.d/agent/discovery/sd/model"
"github.com/netdata/netdata/go/plugins/plugin/go.d/pkg/k8sclient"
"github.com/stretchr/testify/assert"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/kubernetes/fake"
)
var discoveryTags, _ = model.ParseTags("k8s")
func TestMain(m *testing.M) {
_ = os.Setenv(envNodeName, "m01")
_ = os.Setenv(k8sclient.EnvFakeClient, "true")
code := m.Run()
_ = os.Unsetenv(envNodeName)
_ = os.Unsetenv(k8sclient.EnvFakeClient)
os.Exit(code)
}
func TestNewKubeDiscoverer(t *testing.T) {
tests := map[string]struct {
cfg Config
wantErr bool
}{
"pod role config": {
wantErr: false,
cfg: Config{Role: string(rolePod), Tags: "k8s"},
},
"service role config": {
wantErr: false,
cfg: Config{Role: string(roleService), Tags: "k8s"},
},
"empty config": {
wantErr: true,
cfg: Config{},
},
}
for name, test := range tests {
t.Run(name, func(t *testing.T) {
disc, err := NewKubeDiscoverer(test.cfg)
if test.wantErr {
assert.Error(t, err)
assert.Nil(t, disc)
} else {
assert.NoError(t, err)
assert.NotNil(t, disc)
}
})
}
}
func TestKubeDiscoverer_Discover(t *testing.T) {
const prod = "prod"
const dev = "dev"
prodNamespace := newNamespace(prod)
devNamespace := newNamespace(dev)
tests := map[string]struct {
createSim func() discoverySim
}{
"multiple namespaces pod td": {
createSim: func() discoverySim {
httpdProd, nginxProd := newHTTPDPod(), newNGINXPod()
httpdProd.Namespace = prod
nginxProd.Namespace = prod
httpdDev, nginxDev := newHTTPDPod(), newNGINXPod()
httpdDev.Namespace = dev
nginxDev.Namespace = dev
disc, _ := preparePodDiscoverer(
[]string{prod, dev},
prodNamespace, devNamespace, httpdProd, nginxProd, httpdDev, nginxDev)
return discoverySim{
td: disc,
sortBeforeVerify: true,
wantTargetGroups: []model.TargetGroup{
preparePodTargetGroup(httpdDev),
preparePodTargetGroup(nginxDev),
preparePodTargetGroup(httpdProd),
preparePodTargetGroup(nginxProd),
},
}
},
},
"multiple namespaces ClusterIP service td": {
createSim: func() discoverySim {
httpdProd, nginxProd := newHTTPDClusterIPService(), newNGINXClusterIPService()
httpdProd.Namespace = prod
nginxProd.Namespace = prod
httpdDev, nginxDev := newHTTPDClusterIPService(), newNGINXClusterIPService()
httpdDev.Namespace = dev
nginxDev.Namespace = dev
disc, _ := prepareSvcDiscoverer(
[]string{prod, dev},
prodNamespace, devNamespace, httpdProd, nginxProd, httpdDev, nginxDev)
return discoverySim{
td: disc,
sortBeforeVerify: true,
wantTargetGroups: []model.TargetGroup{
prepareSvcTargetGroup(httpdDev),
prepareSvcTargetGroup(nginxDev),
prepareSvcTargetGroup(httpdProd),
prepareSvcTargetGroup(nginxProd),
},
}
},
},
}
for name, test := range tests {
t.Run(name, func(t *testing.T) {
sim := test.createSim()
sim.run(t)
})
}
}
func prepareDiscoverer(role role, namespaces []string, objects ...runtime.Object) (*KubeDiscoverer, kubernetes.Interface) {
client := fake.NewSimpleClientset(objects...)
tags, _ := model.ParseTags("k8s")
disc := &KubeDiscoverer{
tags: tags,
role: role,
namespaces: namespaces,
client: client,
discoverers: nil,
started: make(chan struct{}),
}
return disc, client
}
func newNamespace(name string) *corev1.Namespace {
return &corev1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: name}}
}
func mustCalcHash(obj any) uint64 {
hash, err := calcHash(obj)
if err != nil {
panic(fmt.Sprintf("hash calculation: %v", err))
}
return hash
}
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