86 lines
2.0 KiB
Go
86 lines
2.0 KiB
Go
package dao
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import (
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"context"
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"errors"
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"fmt"
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"github.com/derailed/k9s/internal/client"
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v1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
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"k8s.io/apimachinery/pkg/labels"
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"k8s.io/apimachinery/pkg/runtime"
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)
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var (
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_ Accessor = (*Service)(nil)
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_ Loggable = (*Service)(nil)
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_ Controller = (*Service)(nil)
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)
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// Service represents a k8s service.
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type Service struct {
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Resource
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}
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// TailLogs tail logs for all pods represented by this Service.
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func (s *Service) TailLogs(ctx context.Context, c LogChan, opts LogOptions) error {
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svc, err := s.GetInstance(opts.Path)
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if err != nil {
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return err
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}
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if svc.Spec.Selector == nil || len(svc.Spec.Selector) == 0 {
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return fmt.Errorf("no valid selector found on Service %s", opts.Path)
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}
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return podLogs(ctx, c, svc.Spec.Selector, opts)
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}
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// Pod returns a pod victim by name.
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func (s *Service) Pod(fqn string) (string, error) {
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svc, err := s.GetInstance(fqn)
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if err != nil {
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return "", err
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}
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return podFromSelector(s.Factory, svc.Namespace, svc.Spec.Selector)
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}
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// GetInstance returns a service instance.
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func (s *Service) GetInstance(fqn string) (*v1.Service, error) {
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o, err := s.Factory.Get(s.gvr.String(), fqn, true, labels.Everything())
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if err != nil {
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return nil, err
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}
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var svc v1.Service
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err = runtime.DefaultUnstructuredConverter.FromUnstructured(o.(*unstructured.Unstructured).Object, &svc)
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if err != nil {
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return nil, errors.New("expecting Service resource")
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}
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return &svc, nil
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}
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// ----------------------------------------------------------------------------
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// Helpers...
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func podFromSelector(f Factory, ns string, sel map[string]string) (string, error) {
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oo, err := f.List("v1/pods", ns, true, labels.Set(sel).AsSelector())
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if err != nil {
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return "", err
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}
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if len(oo) == 0 {
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return "", fmt.Errorf("no matching pods for %v", sel)
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}
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var pod v1.Pod
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err = runtime.DefaultUnstructuredConverter.FromUnstructured(oo[0].(*unstructured.Unstructured).Object, &pod)
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if err != nil {
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return "", err
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}
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return client.FQN(pod.Namespace, pod.Name), nil
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}
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