/
utils.go
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/
utils.go
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// Copyright (c) Microsoft Corporation.
// Licensed under the MIT license.
package utils
import (
"context"
"fmt"
"os"
"regexp"
"strings"
"time"
corev1 "k8s.io/api/core/v1"
apierrs "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
utilnet "k8s.io/apimachinery/pkg/util/net"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/apimachinery/pkg/util/wait"
clientset "k8s.io/client-go/kubernetes"
clientgoscheme "k8s.io/client-go/kubernetes/scheme"
"sigs.k8s.io/cloud-provider-azure/pkg/azclient"
"sigs.k8s.io/cloud-provider-azure/pkg/azclient/publicipprefixclient"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/client/config"
"github.com/Azure/kube-egress-gateway/api/v1alpha1"
)
const (
poll = 2 * time.Second
pollTimeout = 5 * time.Minute
pollTimeoutForProvision = 30 * time.Minute
nodeLocationLabel = "failure-domain.beta.kubernetes.io/region"
)
var (
vmssVMProviderIDRE = regexp.MustCompile(`azure:///subscriptions/(?:.*)/resourceGroups/(.+)/providers/Microsoft.Compute/virtualMachineScaleSets/(.+)/virtualMachines/(?:\d+)`)
)
func CreateK8sClient() (k8sClient client.Client, podLogClient clientset.Interface, err error) {
apischeme := runtime.NewScheme()
utilruntime.Must(clientgoscheme.AddToScheme(apischeme))
utilruntime.Must(v1alpha1.AddToScheme(apischeme))
restConfig := config.GetConfigOrDie()
k8sClient, err = client.New(restConfig, client.Options{Scheme: apischeme})
if err != nil {
return
}
podLogClient, err = clientset.NewForConfig(restConfig)
return
}
func CreateAzureClients() (azclient.ClientFactory, error) {
var subscriptionID, tenantID, clientID, clientSecret string
if subscriptionID = os.Getenv("AZURE_SUBSCRIPTION_ID"); subscriptionID == "" {
return nil, fmt.Errorf("AZURE_SUBSCRIPTION_ID is not set")
}
armConfig := &azclient.ARMClientConfig{
TenantID: tenantID,
Cloud: "",
}
authProvider, err := azclient.NewAuthProvider(armConfig, &azclient.AzureAuthConfig{
AADClientID: clientID,
AADClientSecret: clientSecret,
})
if err != nil {
return nil, err
}
// only test in Public Cloud
return azclient.NewClientFactory(&azclient.ClientFactoryConfig{SubscriptionID: subscriptionID}, armConfig, authProvider.ClientSecretCredential)
}
func CreateNamespace(namespaceName string, c client.Client) error {
namespaceObj := &corev1.Namespace{
ObjectMeta: metav1.ObjectMeta{
Name: namespaceName,
Namespace: "",
},
}
return CreateK8sObject(namespaceObj, c)
}
func DeleteNamespace(namespaceName string, c client.Client) error {
namespaceObj := &corev1.Namespace{
ObjectMeta: metav1.ObjectMeta{
Name: namespaceName,
Namespace: "",
},
}
if err := wait.PollUntilContextTimeout(context.Background(), poll, pollTimeout, true, func(ctx context.Context) (bool, error) {
err := c.Delete(ctx, namespaceObj)
if err != nil {
if retriable(err) {
return false, nil
}
return false, err
}
return true, nil
}); err != nil {
return err
}
return nil
}
func CreateK8sObject(obj client.Object, c client.Client) error {
if err := wait.PollUntilContextTimeout(context.Background(), poll, pollTimeout, true, func(ctx context.Context) (bool, error) {
err := c.Create(ctx, obj)
if err != nil {
if retriable(err) {
return false, nil
}
return false, err
}
return true, nil
}); err != nil {
return err
}
return nil
}
func WaitStaticGatewayProvision(sgw *v1alpha1.StaticGatewayConfiguration, c client.Client) (string, error) {
pipPrefix := ""
key := types.NamespacedName{
Name: sgw.Name,
Namespace: sgw.Namespace,
}
if err := wait.PollUntilContextTimeout(context.Background(), poll, pollTimeoutForProvision, true, func(ctx context.Context) (bool, error) {
err := c.Get(ctx, key, sgw)
if err != nil {
if retriable(err) {
return false, nil
}
return false, err
}
if len(sgw.Status.EgressIpPrefix) > 0 {
pipPrefix = sgw.Status.EgressIpPrefix
return true, nil
}
return false, nil
}); err != nil {
return "", err
}
return pipPrefix, nil
}
func WaitStaticGatewayDeletion(sgw *v1alpha1.StaticGatewayConfiguration, c client.Client) error {
key := types.NamespacedName{
Name: sgw.Name,
Namespace: sgw.Namespace,
}
if err := wait.PollUntilContextTimeout(context.Background(), poll, pollTimeoutForProvision, true, func(ctx context.Context) (bool, error) {
err := c.Delete(ctx, sgw)
if err != nil {
if retriable(err) {
return false, nil
}
return false, err
}
return true, nil
}); err != nil {
return err
}
// Wait until gatewayVMConfig is deleted
gatewayVMConfig := &v1alpha1.GatewayVMConfiguration{}
if err := wait.PollUntilContextTimeout(context.Background(), poll, pollTimeoutForProvision, true, func(ctx context.Context) (bool, error) {
err := c.Get(ctx, key, gatewayVMConfig)
if err != nil {
if retriable(err) {
return false, nil
}
if apierrs.IsNotFound(err) {
return true, nil
}
return false, err
}
return false, nil
}); err != nil {
return err
}
return nil
}
func WaitPipPrefixDeletion(resourceGroup, pipName string, c publicipprefixclient.Interface) error {
if err := wait.PollUntilContextTimeout(context.Background(), poll, pollTimeoutForProvision, true, func(ctx context.Context) (bool, error) {
err := c.Delete(ctx, resourceGroup, pipName)
if err != nil {
// retry when pip prefix is still in use
if strings.Contains(err.Error(), "InUsePublicIpPrefixCannotBeDeleted") {
return false, nil
}
return false, err
}
return true, nil
}); err != nil {
return err
}
return nil
}
func GetGatewayVmssProfile(c client.Client) (resourceGroup, vmssName, location string, prefixLen int32, err error) {
nodes := &corev1.NodeList{}
err = c.List(context.Background(), nodes, client.MatchingLabels{"kubeegressgateway.azure.com/mode": "true"})
if err != nil {
return
}
if len(nodes.Items) == 0 {
err = fmt.Errorf("failed to find any gateway nodes")
return
}
// At this moment, we only test one gateway nodepool
matches := vmssVMProviderIDRE.FindStringSubmatch(nodes.Items[0].Spec.ProviderID)
if len(matches) != 3 {
err = fmt.Errorf("gateway node providerID (%s) is not valid", nodes.Items[0].Spec.ProviderID)
return
}
nodeCount := len(nodes.Items)
for i, k := 1, 1; k < nodeCount; i, k = i+1, k<<1 {
prefixLen = int32(32 - i)
}
location = nodes.Items[0].Labels[nodeLocationLabel]
return matches[1], matches[2], location, prefixLen, nil
}
func retriable(err error) bool {
// possible transient errors.
if apierrs.IsInternalError(err) || apierrs.IsTimeout(err) || apierrs.IsServerTimeout(err) ||
apierrs.IsTooManyRequests(err) || utilnet.IsProbableEOF(err) || utilnet.IsConnectionReset(err) {
return true
}
// error with Retry-After header.
_, shouldRetry := apierrs.SuggestsClientDelay(err)
return shouldRetry
}