119 lines
3.5 KiB
Go
119 lines
3.5 KiB
Go
package main
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import (
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"fmt"
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"github.com/containers/libpod/cmd/podman/cliconfig"
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"github.com/containers/libpod/cmd/podman/libpodruntime"
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"github.com/containers/libpod/libpod"
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"github.com/containers/libpod/pkg/rootless"
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podmanVersion "github.com/containers/libpod/version"
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"github.com/ghodss/yaml"
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"github.com/pkg/errors"
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"github.com/spf13/cobra"
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"k8s.io/api/core/v1"
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)
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var (
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containerKubeCommand cliconfig.GenerateKubeValues
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containerKubeDescription = `Command generates Kubernetes Pod YAML (v1 specification) from a podman container or pod.
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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.`
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_containerKubeCommand = &cobra.Command{
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Use: "kube [flags] CONTAINER | POD",
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Short: "Generate Kubernetes pod YAML from a container or pod",
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Long: containerKubeDescription,
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RunE: func(cmd *cobra.Command, args []string) error {
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containerKubeCommand.InputArgs = args
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containerKubeCommand.GlobalFlags = MainGlobalOpts
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return generateKubeYAMLCmd(&containerKubeCommand)
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},
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Example: `podman generate kube ctrID
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podman generate kube podID
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podman generate kube --service podID`,
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}
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)
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func init() {
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containerKubeCommand.Command = _containerKubeCommand
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containerKubeCommand.SetHelpTemplate(HelpTemplate())
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containerKubeCommand.SetUsageTemplate(UsageTemplate())
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flags := containerKubeCommand.Flags()
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flags.BoolVarP(&containerKubeCommand.Service, "service", "s", false, "Generate YAML for kubernetes service object")
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}
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func generateKubeYAMLCmd(c *cliconfig.GenerateKubeValues) error {
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var (
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podYAML *v1.Pod
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container *libpod.Container
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err error
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output []byte
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pod *libpod.Pod
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marshalledPod []byte
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marshalledService []byte
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servicePorts []v1.ServicePort
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)
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if rootless.IsRootless() {
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return errors.Wrapf(libpod.ErrNotImplemented, "rootless users")
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}
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args := c.InputArgs
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if len(args) != 1 {
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return errors.Errorf("you must provide exactly one container|pod ID or name")
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}
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runtime, err := libpodruntime.GetRuntime(&c.PodmanCommand)
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if err != nil {
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return errors.Wrapf(err, "could not get runtime")
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}
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defer runtime.Shutdown(false)
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// Get the container in question
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container, err = runtime.LookupContainer(args[0])
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if err != nil {
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pod, err = runtime.LookupPod(args[0])
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if err != nil {
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return err
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}
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podYAML, servicePorts, err = pod.GenerateForKube()
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} else {
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if len(container.Dependencies()) > 0 {
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return errors.Wrapf(libpod.ErrNotImplemented, "containers with dependencies")
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}
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podYAML, err = container.GenerateForKube()
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}
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if err != nil {
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return err
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}
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if c.Service {
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serviceYAML := libpod.GenerateKubeServiceFromV1Pod(podYAML, servicePorts)
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marshalledService, err = yaml.Marshal(serviceYAML)
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if err != nil {
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return err
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}
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}
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// Marshall the results
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marshalledPod, err = yaml.Marshal(podYAML)
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if err != nil {
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return err
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}
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header := `# Generation of Kubernetes YAML is still under development!
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#
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# Save the output of this file and use kubectl create -f to import
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# it into Kubernetes.
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#
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# Created with podman-%s
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`
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output = append(output, []byte(fmt.Sprintf(header, podmanVersion.Version))...)
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output = append(output, marshalledPod...)
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if c.Bool("service") {
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output = append(output, []byte("---\n")...)
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output = append(output, marshalledService...)
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}
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// Output the v1.Pod with the v1.Container
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fmt.Println(string(output))
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return nil
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}
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