server: standardize on naming

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

server/naming.go

@@ -0,0 +1,86 @@
+package server
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/docker/docker/pkg/stringid"
+	pb "k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
+)
+
+const (
+	kubePrefix    = "k8s"
+	infraName     = "infra"
+	nameDelimiter = "_"
+)
+
+func makeSandboxName(sandboxConfig *pb.PodSandboxConfig) string {
+	return strings.Join([]string{
+		kubePrefix,
+		sandboxConfig.Metadata.Name,
+		sandboxConfig.Metadata.Namespace,
+		sandboxConfig.Metadata.Uid,
+		fmt.Sprintf("%d", sandboxConfig.Metadata.Attempt),
+	}, nameDelimiter)
+}
+
+func makeSandboxContainerName(sandboxConfig *pb.PodSandboxConfig) string {
+	return strings.Join([]string{
+		kubePrefix,
+		infraName,
+		sandboxConfig.Metadata.Name,
+		sandboxConfig.Metadata.Namespace,
+		sandboxConfig.Metadata.Uid,
+		fmt.Sprintf("%d", sandboxConfig.Metadata.Attempt),
+	}, nameDelimiter)
+}
+
+func makeContainerName(sandboxMetadata *pb.PodSandboxMetadata, containerConfig *pb.ContainerConfig) string {
+	return strings.Join([]string{
+		kubePrefix,
+		containerConfig.Metadata.Name,
+		sandboxMetadata.Name,
+		sandboxMetadata.Namespace,
+		sandboxMetadata.Uid,
+		fmt.Sprintf("%d", containerConfig.Metadata.Attempt),
+	}, nameDelimiter)
+}
+
+func (s *Server) generatePodIDandName(sandboxConfig *pb.PodSandboxConfig) (string, string, error) {
+	var (
+		err error
+		id  = stringid.GenerateNonCryptoID()
+	)
+	if sandboxConfig.Metadata.Namespace == "" {
+		return "", "", fmt.Errorf("cannot generate pod ID without namespace")
+	}
+	name, err := s.reservePodName(id, makeSandboxName(sandboxConfig))
+	if err != nil {
+		return "", "", err
+	}
+	return id, name, err
+}
+
+func (s *Server) generateContainerIDandNameForSandbox(sandboxConfig *pb.PodSandboxConfig) (string, string, error) {
+	var (
+		err error
+		id  = stringid.GenerateNonCryptoID()
+	)
+	name, err := s.reserveContainerName(id, makeSandboxContainerName(sandboxConfig))
+	if err != nil {
+		return "", "", err
+	}
+	return id, name, err
+}
+
+func (s *Server) generateContainerIDandName(sandboxMetadata *pb.PodSandboxMetadata, containerConfig *pb.ContainerConfig) (string, string, error) {
+	var (
+		err error
+		id  = stringid.GenerateNonCryptoID()
+	)
+	name, err := s.reserveContainerName(id, makeContainerName(sandboxMetadata, containerConfig))
+	if err != nil {
+		return "", "", err
+	}
+	return id, name, err
+}