Allow containerPortsToServicePorts to fail

Add an error return to it and affected callers.

Should not affect behavior, the function can't currently fail.

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

2 files changed, 30 insertions, 11 deletions

diff --git a/libpod/kube.go b/libpod/kube.go
index 7afa7be3a..29f01c6c5 100644
--- a/libpod/kube.go
+++ b/libpod/kube.go
@@ -79,7 +79,10 @@ func (p *Pod) GenerateForKube(ctx context.Context) (*v1.Pod, []v1.ServicePort, e
 			return nil, servicePorts, err
 		}
 		spState := newServicePortState()
-		servicePorts = spState.containerPortsToServicePorts(ports)
+		servicePorts, err = spState.containerPortsToServicePorts(ports)
+		if err != nil {
+			return nil, servicePorts, err
+		}
 		hostNetwork = infraContainer.NetworkMode() == string(namespaces.NetworkMode(specgen.Host))
 	}
 	pod, err := p.podWithContainers(ctx, allContainers, ports, hostNetwork)
@@ -242,13 +245,17 @@ func ConvertV1PodToYAMLPod(pod *v1.Pod) *YAMLPod {
 }
 
 // GenerateKubeServiceFromV1Pod creates a v1 service object from a v1 pod object
-func GenerateKubeServiceFromV1Pod(pod *v1.Pod, servicePorts []v1.ServicePort) YAMLService {
+func GenerateKubeServiceFromV1Pod(pod *v1.Pod, servicePorts []v1.ServicePort) (YAMLService, error) {
 	service := YAMLService{}
 	selector := make(map[string]string)
 	selector["app"] = pod.Labels["app"]
 	ports := servicePorts
 	if len(ports) == 0 {
-		ports = containersToServicePorts(pod.Spec.Containers)
+		p, err := containersToServicePorts(pod.Spec.Containers)
+		if err != nil {
+			return service, err
+		}
+		ports = p
 	}
 	serviceSpec := v1.ServiceSpec{
 		Ports:    ports,
@@ -262,7 +269,7 @@ func GenerateKubeServiceFromV1Pod(pod *v1.Pod, servicePorts []v1.ServicePort) YA
 		APIVersion: pod.TypeMeta.APIVersion,
 	}
 	service.TypeMeta = tm
-	return service
+	return service, nil
 }
 
 // servicePortState allows calling containerPortsToServicePorts for a single service
@@ -280,7 +287,7 @@ func newServicePortState() servicePortState {
 
 // containerPortsToServicePorts takes a slice of containerports and generates a
 // slice of service ports
-func (state *servicePortState) containerPortsToServicePorts(containerPorts []v1.ContainerPort) []v1.ServicePort {
+func (state *servicePortState) containerPortsToServicePorts(containerPorts []v1.ContainerPort) ([]v1.ServicePort, error) {
 	sps := make([]v1.ServicePort, 0, len(containerPorts))
 	for _, cp := range containerPorts {
 		// Legal nodeport range is 30000-32767
@@ -294,18 +301,22 @@ func (state *servicePortState) containerPortsToServicePorts(containerPorts []v1.
 		}
 		sps = append(sps, servicePort)
 	}
-	return sps
+	return sps, nil
 }
 
 // containersToServicePorts takes a slice of v1.Containers and generates an
 // inclusive list of serviceports to expose
-func containersToServicePorts(containers []v1.Container) []v1.ServicePort {
+func containersToServicePorts(containers []v1.Container) ([]v1.ServicePort, error) {
 	state := newServicePortState()
 	sps := make([]v1.ServicePort, 0, len(containers))
 	for _, ctr := range containers {
-		sps = append(sps, state.containerPortsToServicePorts(ctr.Ports)...)
+		ports, err := state.containerPortsToServicePorts(ctr.Ports)
+		if err != nil {
+			return nil, err
+		}
+		sps = append(sps, ports...)
 	}
-	return sps
+	return sps, nil
 }
 
 func (p *Pod) podWithContainers(ctx context.Context, containers []*Container, ports []v1.ContainerPort, hostNetwork bool) (*v1.Pod, error) {
diff --git a/pkg/domain/infra/abi/generate.go b/pkg/domain/infra/abi/generate.go
index 0defa1923..68bb351bf 100644
--- a/pkg/domain/infra/abi/generate.go
+++ b/pkg/domain/infra/abi/generate.go
@@ -139,7 +139,11 @@ func (ic *ContainerEngine) GenerateKube(ctx context.Context, nameOrIDs []string,
 
 		podContent = append(podContent, b)
 		if options.Service {
-			b, err := generateKubeYAML(libpod.GenerateKubeServiceFromV1Pod(po, []k8sAPI.ServicePort{}))
+			svc, err := libpod.GenerateKubeServiceFromV1Pod(po, []k8sAPI.ServicePort{})
+			if err != nil {
+				return nil, err
+			}
+			b, err := generateKubeYAML(svc)
 			if err != nil {
 				return nil, err
 			}
@@ -177,7 +181,11 @@ func getKubePods(ctx context.Context, pods []*libpod.Pod, getService bool) ([][]
 		pos = append(pos, b)
 
 		if getService {
-			b, err := generateKubeYAML(libpod.GenerateKubeServiceFromV1Pod(po, sp))
+			svc, err := libpod.GenerateKubeServiceFromV1Pod(po, sp)
+			if err != nil {
+				return nil, nil, err
+			}
+			b, err := generateKubeYAML(svc)
 			if err != nil {
 				return nil, nil, err
 			}