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package main
import (
"fmt"
"github.com/containers/libpod/cmd/podman/cliconfig"
"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/spf13/cobra"
"k8s.io/api/core/v1"
)
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
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")
}
func generateKubeYAMLCmd(c *cliconfig.GenerateKubeValues) error {
var (
podYAML *v1.Pod
container *libpod.Container
err error
output []byte
pod *libpod.Pod
marshalledPod []byte
marshalledService []byte
servicePorts []v1.ServicePort
)
if rootless.IsRootless() {
return errors.Wrapf(libpod.ErrNotImplemented, "rootless users")
}
args := c.InputArgs
if len(args) > 1 || (len(args) < 1 && !c.Bool("latest")) {
return errors.Errorf("you must provide one container|pod ID or name or --latest")
}
runtime, err := libpodruntime.GetRuntime(&c.PodmanCommand)
if err != nil {
return errors.Wrapf(err, "could not get runtime")
}
defer runtime.Shutdown(false)
// Get the container in question
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 {
if len(container.Dependencies()) > 0 {
return errors.Wrapf(libpod.ErrNotImplemented, "containers with dependencies")
}
podYAML, err = container.GenerateForKube()
}
if err != nil {
return err
}
if c.Service {
serviceYAML := libpod.GenerateKubeServiceFromV1Pod(podYAML, servicePorts)
marshalledService, err = yaml.Marshal(serviceYAML)
if err != nil {
return err
}
}
// Marshall the results
marshalledPod, err = yaml.Marshal(podYAML)
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...)
}
// Output the v1.Pod with the v1.Container
fmt.Println(string(output))
return nil
}
|
