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package main
import (
"fmt"
"io/ioutil"
"os"
"github.com/containers/libpod/cmd/podman/cliconfig"
"github.com/containers/libpod/pkg/adapter"
podmanVersion "github.com/containers/libpod/version"
"github.com/ghodss/yaml"
"github.com/pkg/errors"
"github.com/spf13/cobra"
)
var (
containerKubeCommand cliconfig.GenerateKubeValues
containerKubeDescription = `Command generates Kubernetes Pod YAML (v1 specification) from a podman container or pod.
Whether the input is for a container or pod, Podman will always generate the specification as a Pod. The input may be in the form of a pod or container name or ID.`
_containerKubeCommand = &cobra.Command{
Use: "kube [flags] CONTAINER | POD",
Short: "Generate Kubernetes pod YAML from a container or pod",
Long: containerKubeDescription,
RunE: func(cmd *cobra.Command, args []string) error {
containerKubeCommand.InputArgs = args
containerKubeCommand.GlobalFlags = MainGlobalOpts
containerKubeCommand.Remote = remoteclient
return generateKubeYAMLCmd(&containerKubeCommand)
},
Example: `podman generate kube ctrID
podman generate kube podID
podman generate kube --service podID`,
}
)
func init() {
containerKubeCommand.Command = _containerKubeCommand
containerKubeCommand.SetHelpTemplate(HelpTemplate())
containerKubeCommand.SetUsageTemplate(UsageTemplate())
flags := containerKubeCommand.Flags()
flags.BoolVarP(&containerKubeCommand.Service, "service", "s", false, "Generate YAML for kubernetes service object")
flags.StringVarP(&containerKubeCommand.Filename, "filename", "f", "", "Filename to output to")
}
func generateKubeYAMLCmd(c *cliconfig.GenerateKubeValues) error {
var (
//podYAML *v1.Pod
err error
output []byte
//pod *libpod.Pod
marshalledPod []byte
marshalledService []byte
)
args := c.InputArgs
if len(args) != 1 {
return errors.Errorf("you must provide exactly one container|pod ID or name")
}
runtime, err := adapter.GetRuntime(getContext(), &c.PodmanCommand)
if err != nil {
return errors.Wrapf(err, "could not get runtime")
}
defer runtime.Shutdown(false)
podYAML, serviceYAML, err := runtime.GenerateKube(c)
if err != nil {
return err
}
// Marshall the results
marshalledPod, err = yaml.Marshal(podYAML)
if err != nil {
return err
}
if c.Service {
marshalledService, err = yaml.Marshal(serviceYAML)
if err != nil {
return err
}
}
header := `# Generation of Kubernetes 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, marshalledPod...)
if c.Bool("service") {
output = append(output, []byte("---\n")...)
output = append(output, marshalledService...)
}
if c.Filename != "" {
if _, err := os.Stat(c.Filename); err == nil {
return errors.Errorf("cannot write to %q - file exists", c.Filename)
}
if err := ioutil.WriteFile(c.Filename, output, 0644); err != nil {
return err
}
} else {
// Output the v1.Pod with the v1.Container
fmt.Println(string(output))
}
return nil
}
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