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translate.go
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translate.go
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package pods
import (
"context"
"fmt"
podtranslate "github.com/loft-sh/vcluster/pkg/controllers/resources/pods/translate"
synccontext "github.com/loft-sh/vcluster/pkg/controllers/syncer/context"
"github.com/loft-sh/vcluster/pkg/specialservices"
"github.com/loft-sh/vcluster/pkg/util/translate"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/types"
"sigs.k8s.io/controller-runtime/pkg/client"
)
func (s *podSyncer) translate(ctx *synccontext.SyncContext, vPod *corev1.Pod) (*corev1.Pod, error) {
kubeIP, dnsIP, ptrServiceList, err := s.getK8sIPDNSIPServiceList(ctx, vPod)
if err != nil {
return nil, err
}
pPod, err := s.podTranslator.Translate(ctx.Context, vPod, ptrServiceList, dnsIP, kubeIP)
if err != nil {
return nil, err
}
return pPod, err
}
func (s *podSyncer) getK8sIPDNSIPServiceList(ctx *synccontext.SyncContext, vPod *corev1.Pod) (string, string, []*corev1.Service, error) {
kubeIP, err := s.findKubernetesIP(ctx)
if err != nil {
return "", "", nil, err
}
dnsIP, err := s.findKubernetesDNSIP(ctx)
if err != nil {
return "", "", nil, err
}
// get services for pod
serviceList := &corev1.ServiceList{}
err = ctx.VirtualClient.List(ctx.Context, serviceList, client.InNamespace(vPod.Namespace))
if err != nil {
return "", "", nil, err
}
ptrServiceList := make([]*corev1.Service, 0, len(serviceList.Items))
for _, svc := range serviceList.Items {
s := svc
ptrServiceList = append(ptrServiceList, &s)
}
return kubeIP, dnsIP, ptrServiceList, nil
}
func (s *podSyncer) translateUpdate(ctx context.Context, pClient client.Client, pObj, vObj *corev1.Pod) (*corev1.Pod, error) {
secret, exists, err := podtranslate.GetSecretIfExists(ctx, pClient, vObj.Name, vObj.Namespace)
if err != nil {
return nil, err
}
if exists {
// check if owner is vcluster service, if so, modify to pod as owner
err := podtranslate.SetPodAsOwner(ctx, pObj, pClient, secret)
if err != nil {
return nil, err
}
}
return s.podTranslator.Diff(ctx, vObj, pObj)
}
func (s *podSyncer) findKubernetesIP(ctx *synccontext.SyncContext) (string, error) {
pService := &corev1.Service{}
err := ctx.CurrentNamespaceClient.Get(ctx.Context, types.NamespacedName{
Name: s.serviceName,
Namespace: ctx.CurrentNamespace,
}, pService)
if err != nil {
return "", err
}
return pService.Spec.ClusterIP, nil
}
func (s *podSyncer) findKubernetesDNSIP(ctx *synccontext.SyncContext) (string, error) {
pClient, namespace := specialservices.Default.DNSNamespace(ctx)
// first try to find the actual synced service, then fallback to a different if we have a suffix (only in the case of integrated coredns)
ip := s.translateAndFindService(
ctx,
pClient,
namespace,
translate.Default.PhysicalName(specialservices.DefaultKubeDNSServiceName, specialservices.DefaultKubeDNSServiceNamespace),
)
if ip == "" {
return "", fmt.Errorf("waiting for DNS service IP")
}
return ip, nil
}
func (s *podSyncer) translateAndFindService(ctx *synccontext.SyncContext, kubeClient client.Client, namespace, name string) string {
pService := &corev1.Service{}
err := kubeClient.Get(ctx.Context, types.NamespacedName{
Name: name,
Namespace: namespace,
}, pService)
if err != nil {
return ""
}
return pService.Spec.ClusterIP
}