generate kube

add the ability to generate kubernetes pod and service yaml representations
of libpod containers and pods.

Signed-off-by: baude <bbaude@redhat.com>

3 files changed, 62 insertions, 51 deletions

diff --git a/cmd/podman/generate.go b/cmd/podman/generate.go
new file mode 100644
index 000000000..765d0ee70
--- /dev/null
+++ b/cmd/podman/generate.go
@@ -0,0 +1,23 @@
+package main
+
+import (
+	"github.com/urfave/cli"
+)
+
+var (
+	generateSubCommands = []cli.Command{
+		containerKubeCommand,
+	}
+
+	generateDescription = "generate structured data based for a containers and pods"
+	kubeCommand         = cli.Command{
+		Name:                   "generate",
+		Usage:                  "generated structured data",
+		Description:            generateDescription,
+		ArgsUsage:              "",
+		Subcommands:            generateSubCommands,
+		UseShortOptionHandling: true,
+		OnUsageError:           usageErrorHandler,
+		Hidden:                 true,
+	}
+)
diff --git a/cmd/podman/kube_generate.go b/cmd/podman/generate_kube.go
index a18912668..de9f701b0 100644
--- a/cmd/podman/kube_generate.go
+++ b/cmd/podman/generate_kube.go
@@ -6,10 +6,11 @@ import (
 	"github.com/containers/libpod/cmd/podman/libpodruntime"
 	"github.com/containers/libpod/libpod"
 	"github.com/containers/libpod/pkg/rootless"
+	podmanVersion "github.com/containers/libpod/version"
 	"github.com/ghodss/yaml"
 	"github.com/pkg/errors"
-	"github.com/sirupsen/logrus"
 	"github.com/urfave/cli"
+	"k8s.io/api/core/v1"
 )
 
 var (
@@ -18,16 +19,15 @@ var (
 			Name:  "service, s",
 			Usage: "only generate YAML for kubernetes service object",
 		},
-		LatestFlag,
 	}
 	containerKubeDescription = "Generate Kubernetes Pod YAML"
 	containerKubeCommand     = cli.Command{
-		Name:                   "generate",
-		Usage:                  "Generate Kubernetes pod YAML for a container",
+		Name:                   "kube",
+		Usage:                  "Generate Kubernetes pod YAML for a container or pod",
 		Description:            containerKubeDescription,
 		Flags:                  sortFlags(containerKubeFlags),
 		Action:                 generateKubeYAMLCmd,
-		ArgsUsage:              "CONTAINER-NAME",
+		ArgsUsage:              "CONTAINER|POD-NAME",
 		UseShortOptionHandling: true,
 		OnUsageError:           usageErrorHandler,
 	}
@@ -36,9 +36,13 @@ var (
 // generateKubeYAMLCmdgenerates or replays kube
 func generateKubeYAMLCmd(c *cli.Context) error {
 	var (
-		container *libpod.Container
-		err       error
-		output    []byte
+		podYAML        *v1.Pod
+		container      *libpod.Container
+		err            error
+		output         []byte
+		pod            *libpod.Pod
+		mashalledBytes []byte
+		servicePorts   []v1.ServicePort
 	)
 
 	if rootless.IsRootless() {
@@ -46,10 +50,7 @@ func generateKubeYAMLCmd(c *cli.Context) error {
 	}
 	args := c.Args()
 	if len(args) > 1 || (len(args) < 1 && !c.Bool("latest")) {
-		return errors.Errorf("you must provide one container ID or name or --latest")
-	}
-	if c.Bool("service") {
-		return errors.Wrapf(libpod.ErrNotImplemented, "service generation")
+		return errors.Errorf("you must provide one container|pod ID or name or --latest")
 	}
 
 	runtime, err := libpodruntime.GetRuntime(c)
@@ -59,33 +60,43 @@ func generateKubeYAMLCmd(c *cli.Context) error {
 	defer runtime.Shutdown(false)
 
 	// Get the container in question
-	if c.Bool("latest") {
-		container, err = runtime.GetLatestContainer()
+	container, err = runtime.LookupContainer(args[0])
+	if err != nil {
+		pod, err = runtime.LookupPod(args[0])
+		if err != nil {
+			return err
+		}
+		podYAML, servicePorts, err = pod.GenerateForKube()
 	} else {
-		container, err = runtime.LookupContainer(args[0])
+		if len(container.Dependencies()) > 0 {
+			return errors.Wrapf(libpod.ErrNotImplemented, "containers with dependencies")
+		}
+		podYAML, err = container.GenerateForKube()
 	}
 	if err != nil {
 		return err
 	}
 
-	if len(container.Dependencies()) > 0 {
-		return errors.Wrapf(libpod.ErrNotImplemented, "containers with dependencies")
+	if c.Bool("service") {
+		serviceYAML := libpod.GenerateKubeServiceFromV1Pod(podYAML, servicePorts)
+		mashalledBytes, err = yaml.Marshal(serviceYAML)
+	} else {
+		// Marshall the results
+		mashalledBytes, err = yaml.Marshal(podYAML)
 	}
-
-	podYAML, err := container.InspectForKube()
 	if err != nil {
 		return err
 	}
 
-	developmentComment := []byte("# Generation of Kubenetes YAML is still under development!\n")
-	logrus.Warn("This function is still under heavy development.")
-	// Marshall the results
-	b, err := yaml.Marshal(podYAML)
-	if err != nil {
-		return err
-	}
-	output = append(output, developmentComment...)
-	output = append(output, b...)
+	header := `# Generation of Kubenetes YAML is still under development!
+#
+# Save the output of this file and use kubectl create -f to import
+# it into Kubernetes.
+#
+# Created with podman-%s
+`
+	output = append(output, []byte(fmt.Sprintf(header, podmanVersion.Version))...)
+	output = append(output, mashalledBytes...)
 	// Output the v1.Pod with the v1.Container
 	fmt.Println(string(output))
 
diff --git a/cmd/podman/kube.go b/cmd/podman/kube.go
deleted file mode 100644
index 2cb407c09..000000000
--- a/cmd/podman/kube.go
+++ /dev/null
@@ -1,23 +0,0 @@
-package main
-
-import (
-	"github.com/urfave/cli"
-)
-
-var (
-	kubeSubCommands = []cli.Command{
-		containerKubeCommand,
-	}
-
-	kubeDescription = "Work with Kubernetes objects"
-	kubeCommand     = cli.Command{
-		Name:                   "kube",
-		Usage:                  "Import and export Kubernetes objections from and to Podman",
-		Description:            containerDescription,
-		ArgsUsage:              "",
-		Subcommands:            kubeSubCommands,
-		UseShortOptionHandling: true,
-		OnUsageError:           usageErrorHandler,
-		Hidden:                 true,
-	}
-)