server: split sandboxes actions

Signed-off-by: Antonio Murdaca <runcom@redhat.com>

server/sandbox_list.go

@@ -0,0 +1,88 @@
+package server
+
+import (
+	"github.com/Sirupsen/logrus"
+	"github.com/kubernetes-incubator/cri-o/oci"
+	"golang.org/x/net/context"
+	"k8s.io/kubernetes/pkg/fields"
+	pb "k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
+)
+
+// filterSandbox returns whether passed container matches filtering criteria
+func filterSandbox(p *pb.PodSandbox, filter *pb.PodSandboxFilter) bool {
+	if filter != nil {
+		if filter.State != nil {
+			if *p.State != *filter.State {
+				return false
+			}
+		}
+		if filter.LabelSelector != nil {
+			sel := fields.SelectorFromSet(filter.LabelSelector)
+			if !sel.Matches(fields.Set(p.Labels)) {
+				return false
+			}
+		}
+	}
+	return true
+}
+
+// ListPodSandbox returns a list of SandBoxes.
+func (s *Server) ListPodSandbox(ctx context.Context, req *pb.ListPodSandboxRequest) (*pb.ListPodSandboxResponse, error) {
+	logrus.Debugf("ListPodSandboxRequest %+v", req)
+	var pods []*pb.PodSandbox
+	var podList []*sandbox
+	for _, sb := range s.state.sandboxes {
+		podList = append(podList, sb)
+	}
+
+	filter := req.Filter
+	// Filter by pod id first.
+	if filter != nil {
+		if filter.Id != nil {
+			sb := s.getSandbox(*filter.Id)
+			if sb == nil {
+				podList = []*sandbox{}
+			} else {
+				podList = []*sandbox{sb}
+			}
+		}
+	}
+
+	for _, sb := range podList {
+		podInfraContainer := sb.infraContainer
+		if podInfraContainer == nil {
+			// this can't really happen, but if it does because of a bug
+			// it's better not to panic
+			continue
+		}
+		if err := s.runtime.UpdateStatus(podInfraContainer); err != nil {
+			return nil, err
+		}
+		cState := s.runtime.ContainerStatus(podInfraContainer)
+		created := cState.Created.UnixNano()
+		rStatus := pb.PodSandboxState_SANDBOX_NOTREADY
+		if cState.Status == oci.ContainerStateRunning {
+			rStatus = pb.PodSandboxState_SANDBOX_READY
+		}
+
+		pod := &pb.PodSandbox{
+			Id:          &sb.id,
+			CreatedAt:   int64Ptr(created),
+			State:       &rStatus,
+			Labels:      sb.labels,
+			Annotations: sb.annotations,
+			Metadata:    sb.metadata,
+		}
+
+		// Filter by other criteria such as state and labels.
+		if filterSandbox(pod, req.Filter) {
+			pods = append(pods, pod)
+		}
+	}
+
+	resp := &pb.ListPodSandboxResponse{
+		Items: pods,
+	}
+	logrus.Debugf("ListPodSandboxResponse %+v", resp)
+	return resp, nil
+}