expose podman.sock in machine inspect

For consumers of the podman.sock who want a predictable way to find the
podman sock, we now include it under 'ConnectionConfig' in podman
machine inspect.

Fixes: #14231

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

pkg/machine/config.go

@@ -139,6 +139,7 @@ type DistributionDownload interface {
 }
 type InspectInfo struct {
 	ConfigPath     VMFile
+	ConnectionInfo ConnectionConfig
 	Created        time.Time
 	Image          ImageConfig
 	LastUp         time.Time
@@ -286,11 +287,11 @@ func NewMachineFile(path string, symlink *string) (*VMFile, error) {
 // makeSymlink for macOS creates a symlink in $HOME/.podman/
 // for a machinefile like a socket
 func (m *VMFile) makeSymlink(symlink *string) error {
-	homedir, err := os.UserHomeDir()
+	homeDir, err := os.UserHomeDir()
 	if err != nil {
 		return err
 	}
-	sl := filepath.Join(homedir, ".podman", *symlink)
+	sl := filepath.Join(homeDir, ".podman", *symlink)
 	// make the symlink dir and throw away if it already exists
 	if err := os.MkdirAll(filepath.Dir(sl), 0700); err != nil && !errors2.Is(err, os.ErrNotExist) {
 		return err
@@ -335,3 +336,9 @@ type SSHConfig struct {
 	// RemoteUsername of the vm user
 	RemoteUsername string
 }
+
+// ConnectionConfig contains connections like sockets, etc.
+type ConnectionConfig struct {
+	// PodmanSocket is the exported podman service socket
+	PodmanSocket *VMFile `json:"PodmanSocket"`
+}

pkg/machine/e2e/inspect_test.go

@@ -2,6 +2,7 @@ package e2e
 
 import (
 	"encoding/json"
+	"strings"
 
 	"github.com/containers/podman/v4/pkg/machine"
 	"github.com/containers/podman/v4/pkg/machine/qemu"
@@ -86,6 +87,7 @@ var _ = Describe("podman machine stop", func() {
 		var inspectInfo []machine.InspectInfo
 		err = jsoniter.Unmarshal(inspectSession.Bytes(), &inspectInfo)
 		Expect(err).To(BeNil())
+		Expect(strings.HasSuffix(inspectInfo[0].ConnectionInfo.PodmanSocket.GetPath(), "podman.sock"))
 
 		inspect := new(inspectMachine)
 		inspect = inspect.withFormat("{{.Name}}")

pkg/machine/qemu/machine.go

@@ -1471,9 +1471,15 @@ func (v *MachineVM) Inspect() (*machine.InspectInfo, error) {
 	if err != nil {
 		return nil, err
 	}
-
+	connInfo := new(machine.ConnectionConfig)
+	podmanSocket, err := v.forwardSocketPath()
+	if err != nil {
+		return nil, err
+	}
+	connInfo.PodmanSocket = podmanSocket
 	return &machine.InspectInfo{
 		ConfigPath:     v.ConfigPath,
+		ConnectionInfo: *connInfo,
 		Created:        v.Created,
 		Image:          v.ImageConfig,
 		LastUp:         v.LastUp,