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fixture.go
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fixture.go
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package tests
import (
"bufio"
"context"
"errors"
"fmt"
"io"
"io/ioutil"
"os"
"sync"
eiriniclient "code.cloudfoundry.org/eirini-controller/pkg/generated/clientset/versioned"
eirinischeme "code.cloudfoundry.org/eirini-controller/pkg/generated/clientset/versioned/scheme"
. "github.com/onsi/ginkgo/v2"
. "github.com/onsi/gomega"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
kscheme "k8s.io/client-go/kubernetes/scheme"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
runtimeclient "sigs.k8s.io/controller-runtime/pkg/client"
)
const (
basePortNumber = 20000
portRange = 1000
)
type Fixture struct {
Clientset kubernetes.Interface
EiriniClientset eiriniclient.Interface
RuntimeClient runtimeclient.Client
Namespace string
KubeConfigPath string
Writer io.Writer
nextAvailablePort int
portMux *sync.Mutex
extraNamespaces []string
}
func makeKubeConfigCopy() string {
kubeConfig := GetKubeconfig()
if kubeConfig == "" {
return ""
}
tmpKubeConfig, err := ioutil.TempFile("", "kube.cfg")
Expect(err).NotTo(HaveOccurred())
defer tmpKubeConfig.Close()
kubeConfigContents, err := os.Open(kubeConfig)
Expect(err).NotTo(HaveOccurred())
defer kubeConfigContents.Close()
_, err = io.Copy(tmpKubeConfig, kubeConfigContents)
Expect(err).NotTo(HaveOccurred())
return tmpKubeConfig.Name()
}
func NewFixture(writer io.Writer) *Fixture {
kubeConfigPath := makeKubeConfigCopy()
config, err := clientcmd.BuildConfigFromFlags("", kubeConfigPath)
Expect(err).NotTo(HaveOccurred(), "failed to build config from flags")
clientset, err := kubernetes.NewForConfig(config)
Expect(err).NotTo(HaveOccurred(), "failed to create clientset")
lrpclientset, err := eiriniclient.NewForConfig(config)
Expect(err).NotTo(HaveOccurred(), "failed to create clientset")
err = kscheme.AddToScheme(eirinischeme.Scheme)
Expect(err).NotTo(HaveOccurred())
runtimeClient, err := runtimeclient.New(config, runtimeclient.Options{Scheme: eirinischeme.Scheme})
Expect(err).NotTo(HaveOccurred(), "failed to create runtime client")
return &Fixture{
KubeConfigPath: kubeConfigPath,
Clientset: clientset,
EiriniClientset: lrpclientset,
RuntimeClient: runtimeClient,
Writer: writer,
nextAvailablePort: basePortNumber + portRange*GinkgoParallelProcess(),
portMux: &sync.Mutex{},
}
}
func (f *Fixture) SetUp() {
f.Namespace = f.CreateExtraNamespace()
}
func (f *Fixture) NextAvailablePort() int {
f.portMux.Lock()
defer f.portMux.Unlock()
if f.nextAvailablePort > f.maxPortNumber() {
Fail("Ginkgo node %d is not allowed to allocate more than %d ports", GinkgoParallelProcess(), portRange)
}
port := f.nextAvailablePort
f.nextAvailablePort++
return port
}
func (f Fixture) maxPortNumber() int {
return basePortNumber + portRange*GinkgoParallelProcess() + portRange
}
func (f *Fixture) TearDown() {
f.printDebugInfo()
for _, ns := range f.extraNamespaces {
_ = f.deleteNamespace(ns)
}
}
func (f *Fixture) Destroy() {
Expect(os.RemoveAll(f.KubeConfigPath)).To(Succeed())
}
func (f *Fixture) CreateExtraNamespace() string {
name := f.configureNewNamespace()
fmt.Fprintf(GinkgoWriter, "Created namespace %q\n", name)
f.extraNamespaces = append(f.extraNamespaces, name)
return name
}
func (f *Fixture) configureNewNamespace() string {
namespace := CreateRandomNamespace(f.Clientset)
Expect(ConfigureWorkloadsNamespace(namespace, GetApplicationServiceAccount(), f.Clientset)).To(Succeed(), "failed to configure workloads namespace")
return namespace
}
func (f *Fixture) deleteNamespace(namespace string) error {
return DeleteNamespace(namespace, f.Clientset)
}
func (f *Fixture) printDebugInfo() {
fmt.Fprintln(f.Writer, "Jobs:")
jobs, _ := f.Clientset.BatchV1().Jobs(f.Namespace).List(context.Background(), metav1.ListOptions{})
for _, job := range jobs.Items {
fmt.Fprintf(f.Writer, "Job: %s status is: %#v\n", job.Name, job.Status)
fmt.Fprintln(f.Writer, "-----------")
}
statefulsets, _ := f.Clientset.AppsV1().StatefulSets(f.Namespace).List(context.Background(), metav1.ListOptions{})
fmt.Fprintf(f.Writer, "StatefulSets:")
for _, s := range statefulsets.Items {
fmt.Fprintf(f.Writer, "StatefulSet: %s status is: %#v\n", s.Name, s.Status)
fmt.Fprintln(f.Writer, "-----------")
}
pods, _ := f.Clientset.CoreV1().Pods(f.Namespace).List(context.Background(), metav1.ListOptions{})
fmt.Fprintf(f.Writer, "Pods:")
for _, p := range pods.Items {
fmt.Fprintf(f.Writer, "Pod: %s status is: %#v\n", p.Name, p.Status)
fmt.Fprintln(f.Writer, "-----------")
fmt.Fprintf(f.Writer, "Pod: %s logs are: \n", p.Name)
logsReq := f.Clientset.CoreV1().Pods(f.Namespace).GetLogs(p.Name, &corev1.PodLogOptions{})
if err := consumeRequest(logsReq, f.Writer); err != nil {
fmt.Fprintf(f.Writer, "Failed to get logs for Pod: %s becase: %v \n", p.Name, err)
}
}
}
func consumeRequest(request rest.ResponseWrapper, out io.Writer) error {
readCloser, err := request.Stream(context.Background())
if err != nil {
return err
}
defer readCloser.Close()
r := bufio.NewReader(readCloser)
for {
bytes, err := r.ReadBytes('\n')
if _, writeErr := out.Write(bytes); writeErr != nil {
return writeErr
}
if err != nil {
if !errors.Is(err, io.EOF) {
return err
}
return nil
}
}
}