server: split containers actions

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

server/container_list.go

@@ -0,0 +1,104 @@
+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"
+)
+
+// filterContainer returns whether passed container matches filtering criteria
+func filterContainer(c *pb.Container, filter *pb.ContainerFilter) bool {
+	if filter != nil {
+		if filter.State != nil {
+			if *c.State != *filter.State {
+				return false
+			}
+		}
+		if filter.LabelSelector != nil {
+			sel := fields.SelectorFromSet(filter.LabelSelector)
+			if !sel.Matches(fields.Set(c.Labels)) {
+				return false
+			}
+		}
+	}
+	return true
+}
+
+// ListContainers lists all containers by filters.
+func (s *Server) ListContainers(ctx context.Context, req *pb.ListContainersRequest) (*pb.ListContainersResponse, error) {
+	logrus.Debugf("ListContainersRequest %+v", req)
+	var ctrs []*pb.Container
+	filter := req.Filter
+	ctrList := s.state.containers.List()
+
+	// Filter using container id and pod id first.
+	if filter != nil {
+		if filter.Id != nil {
+			c := s.state.containers.Get(*filter.Id)
+			if c != nil {
+				if filter.PodSandboxId != nil {
+					if c.Sandbox() == *filter.PodSandboxId {
+						ctrList = []*oci.Container{c}
+					} else {
+						ctrList = []*oci.Container{}
+					}
+
+				} else {
+					ctrList = []*oci.Container{c}
+				}
+			}
+		} else {
+			if filter.PodSandboxId != nil {
+				pod := s.state.sandboxes[*filter.PodSandboxId]
+				if pod == nil {
+					ctrList = []*oci.Container{}
+				} else {
+					ctrList = pod.containers.List()
+				}
+			}
+		}
+	}
+
+	for _, ctr := range ctrList {
+		if err := s.runtime.UpdateStatus(ctr); err != nil {
+			return nil, err
+		}
+
+		podSandboxID := ctr.Sandbox()
+		cState := s.runtime.ContainerStatus(ctr)
+		created := cState.Created.UnixNano()
+		rState := pb.ContainerState_CONTAINER_UNKNOWN
+		cID := ctr.ID()
+
+		c := &pb.Container{
+			Id:           &cID,
+			PodSandboxId: &podSandboxID,
+			CreatedAt:    int64Ptr(created),
+			Labels:       ctr.Labels(),
+			Metadata:     ctr.Metadata(),
+		}
+
+		switch cState.Status {
+		case oci.ContainerStateCreated:
+			rState = pb.ContainerState_CONTAINER_CREATED
+		case oci.ContainerStateRunning:
+			rState = pb.ContainerState_CONTAINER_RUNNING
+		case oci.ContainerStateStopped:
+			rState = pb.ContainerState_CONTAINER_EXITED
+		}
+		c.State = &rState
+
+		// Filter by other criteria such as state and labels.
+		if filterContainer(c, req.Filter) {
+			ctrs = append(ctrs, c)
+		}
+	}
+
+	resp := &pb.ListContainersResponse{
+		Containers: ctrs,
+	}
+	logrus.Debugf("ListContainersResponse: %+v", resp)
+	return resp, nil
+}