Podman machine enhancements

Podman machine remove is now called `rm`.

Podman machine create now supports resizing the image to the value of
--disk-size as provided.  The default is to 10G.

Added systemd unit file on guest via ignition that sends a Ready message
to the host over a virtio-socket so that we know when the VM is booted
and ready for use.

Podman machine commands no longer require a VM name as an argument.  A
default VM name is defined and if no VM name is provided as a arg, the
default will be used.

[NO TESTS NEEDED]

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

1 files changed, 92 insertions, 0 deletions

diff --git a/cmd/podman/machine/rm.go b/cmd/podman/machine/rm.go
new file mode 100644
index 000000000..cd2cc84f2
--- /dev/null
+++ b/cmd/podman/machine/rm.go
@@ -0,0 +1,92 @@
+// +build amd64,linux amd64,darwin arm64,darwin
+
+package machine
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/containers/common/pkg/completion"
+	"github.com/containers/podman/v3/cmd/podman/registry"
+	"github.com/containers/podman/v3/pkg/domain/entities"
+	"github.com/containers/podman/v3/pkg/machine"
+	"github.com/containers/podman/v3/pkg/machine/qemu"
+	"github.com/spf13/cobra"
+)
+
+var (
+	rmCmd = &cobra.Command{
+		Use:               "rm [options] [NAME]",
+		Short:             "Remove an existing machine",
+		Long:              "Remove an existing machine ",
+		RunE:              rm,
+		Args:              cobra.MaximumNArgs(1),
+		Example:           `podman machine rm myvm`,
+		ValidArgsFunction: completion.AutocompleteNone,
+	}
+)
+
+var (
+	destoryOptions machine.RemoveOptions
+)
+
+func init() {
+	registry.Commands = append(registry.Commands, registry.CliCommand{
+		Mode:    []entities.EngineMode{entities.ABIMode, entities.TunnelMode},
+		Command: rmCmd,
+		Parent:  machineCmd,
+	})
+
+	flags := rmCmd.Flags()
+	formatFlagName := "force"
+	flags.BoolVar(&destoryOptions.Force, formatFlagName, false, "Do not prompt before rming")
+
+	keysFlagName := "save-keys"
+	flags.BoolVar(&destoryOptions.SaveKeys, keysFlagName, false, "Do not delete SSH keys")
+
+	ignitionFlagName := "save-ignition"
+	flags.BoolVar(&destoryOptions.SaveIgnition, ignitionFlagName, false, "Do not delete ignition file")
+
+	imageFlagName := "save-image"
+	flags.BoolVar(&destoryOptions.SaveImage, imageFlagName, false, "Do not delete the image file")
+}
+
+func rm(cmd *cobra.Command, args []string) error {
+	var (
+		err    error
+		vm     machine.VM
+		vmType string
+	)
+	vmName := defaultMachineName
+	if len(args) > 0 && len(args[0]) > 0 {
+		vmName = args[0]
+	}
+	switch vmType {
+	default:
+		vm, err = qemu.LoadVMByName(vmName)
+	}
+	if err != nil {
+		return err
+	}
+	confirmationMessage, remove, err := vm.Remove(vmName, machine.RemoveOptions{})
+	if err != nil {
+		return err
+	}
+
+	if !destoryOptions.Force {
+		// Warn user
+		fmt.Println(confirmationMessage)
+		reader := bufio.NewReader(os.Stdin)
+		fmt.Print("Are you sure you want to continue? [y/N] ")
+		answer, err := reader.ReadString('\n')
+		if err != nil {
+			return err
+		}
+		if strings.ToLower(answer)[0] != 'y' {
+			return nil
+		}
+	}
+	return remove()
+}