/
svc.go
85 lines (69 loc) · 2.05 KB
/
svc.go
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package dao
import (
"context"
"errors"
"fmt"
"github.com/kswapd/k13s/internal/client"
v1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime"
)
var (
_ Accessor = (*Service)(nil)
_ Loggable = (*Service)(nil)
_ Controller = (*Service)(nil)
)
// Service represents a k8s service.
type Service struct {
Resource
}
// TailLogs tail logs for all pods represented by this Service.
func (s *Service) TailLogs(ctx context.Context, opts *LogOptions) ([]LogChan, error) {
svc, err := s.GetInstance(opts.Path)
if err != nil {
return nil, err
}
if svc.Spec.Selector == nil || len(svc.Spec.Selector) == 0 {
return nil, fmt.Errorf("no valid selector found on Service %s", opts.Path)
}
return podLogs(ctx, svc.Spec.Selector, opts)
}
// Pod returns a pod victim by name.
func (s *Service) Pod(fqn string) (string, error) {
svc, err := s.GetInstance(fqn)
if err != nil {
return "", err
}
return podFromSelector(s.Factory, svc.Namespace, svc.Spec.Selector)
}
// GetInstance returns a service instance.
func (s *Service) GetInstance(fqn string) (*v1.Service, error) {
o, err := s.GetFactory().Get(s.gvr.String(), fqn, true, labels.Everything())
if err != nil {
return nil, err
}
var svc v1.Service
err = runtime.DefaultUnstructuredConverter.FromUnstructured(o.(*unstructured.Unstructured).Object, &svc)
if err != nil {
return nil, errors.New("expecting Service resource")
}
return &svc, nil
}
// ----------------------------------------------------------------------------
// Helpers...
func podFromSelector(f Factory, ns string, sel map[string]string) (string, error) {
oo, err := f.List("v1/pods", ns, true, labels.Set(sel).AsSelector())
if err != nil {
return "", err
}
if len(oo) == 0 {
return "", fmt.Errorf("no matching pods for %v", sel)
}
var pod v1.Pod
err = runtime.DefaultUnstructuredConverter.FromUnstructured(oo[0].(*unstructured.Unstructured).Object, &pod)
if err != nil {
return "", err
}
return client.FQN(pod.Namespace, pod.Name), nil
}