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authorValentin Rothberg <rothberg@redhat.com>2020-05-05 11:35:32 +0200
committerValentin Rothberg <rothberg@redhat.com>2020-05-06 17:08:22 +0200
commitf269be3a314a0903bb74a20de0e93b4f274531e6 (patch)
tree5f64bc2b03abb8639fb7cfe2f13ee7589c6f8cdd /cmd/podman/generate/kube.go
parent0eb905ff2c2f033ee3009d8d374dcd2347ac04d1 (diff)
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add {generate,play} kube
Add the `podman generate kube` and `podman play kube` command. The code has largely been copied from Podman v1 but restructured to not leak the K8s core API into the (remote) client. Both commands are added in the same commit to allow for enabling the tests at the same time. Move some exports from `cmd/podman/common` to the appropriate places in the backend to avoid circular dependencies. Move definitions of label annotations to `libpod/define` and set the security-opt labels in the frontend to make kube tests pass. Implement rest endpoints, bindings and the tunnel interface. Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
Diffstat (limited to 'cmd/podman/generate/kube.go')
-rw-r--r--cmd/podman/generate/kube.go68
1 files changed, 68 insertions, 0 deletions
diff --git a/cmd/podman/generate/kube.go b/cmd/podman/generate/kube.go
new file mode 100644
index 000000000..86a9cc686
--- /dev/null
+++ b/cmd/podman/generate/kube.go
@@ -0,0 +1,68 @@
+package pods
+
+import (
+ "fmt"
+ "io/ioutil"
+ "os"
+
+ "github.com/containers/libpod/cmd/podman/registry"
+ "github.com/containers/libpod/cmd/podman/utils"
+ "github.com/containers/libpod/pkg/domain/entities"
+ "github.com/pkg/errors"
+ "github.com/spf13/cobra"
+)
+
+var (
+ kubeOptions = entities.GenerateKubeOptions{}
+ kubeFile = ""
+ kubeDescription = `Command generates Kubernetes pod and service 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.`
+
+ kubeCmd = &cobra.Command{
+ Use: "kube [flags] CONTAINER | POD",
+ Short: "Generate Kubernetes YAML from a container or pod.",
+ Long: kubeDescription,
+ RunE: kube,
+ Args: cobra.ExactArgs(1),
+ Example: `podman generate kube ctrID
+ podman generate kube podID
+ podman generate kube --service podID`,
+ }
+)
+
+func init() {
+ registry.Commands = append(registry.Commands, registry.CliCommand{
+ Mode: []entities.EngineMode{entities.ABIMode, entities.TunnelMode},
+ Command: kubeCmd,
+ Parent: generateCmd,
+ })
+ flags := kubeCmd.Flags()
+ flags.BoolVarP(&kubeOptions.Service, "service", "s", false, "Generate YAML for a Kubernetes service object")
+ flags.StringVarP(&kubeFile, "filename", "f", "", "Write output to the specified path")
+ flags.SetNormalizeFunc(utils.AliasFlags)
+}
+
+func kube(cmd *cobra.Command, args []string) error {
+ report, err := registry.ContainerEngine().GenerateKube(registry.GetContext(), args[0], kubeOptions)
+ if err != nil {
+ return err
+ }
+
+ content, err := ioutil.ReadAll(report.Reader)
+ if err != nil {
+ return err
+ }
+ if cmd.Flags().Changed("filename") {
+ if _, err := os.Stat(kubeFile); err == nil {
+ return errors.Errorf("cannot write to %q", kubeFile)
+ }
+ if err := ioutil.WriteFile(kubeFile, content, 0644); err != nil {
+ return errors.Wrapf(err, "cannot write to %q", kubeFile)
+ }
+ return nil
+ }
+
+ fmt.Println(string(content))
+ return nil
+}