Fail if vm exists in hyperv already

Fix a bug where if a vm exists, created by some other process/user, and
you attempt to make a podman machine with the same name.

Signed-off-by: Brent Baude <[email protected]>

pkg/machine/e2e/config_init_test.go

@@ -125,7 +125,7 @@ func (i *initMachine) withRootful(r bool) *initMachine {
 	return i
 }
 
-func (i *initMachine) withUserModeNetworking(r bool) *initMachine {
+func (i *initMachine) withUserModeNetworking(r bool) *initMachine { //nolint:unused
 	i.userModeNetworking = r
 	return i
 }

pkg/machine/e2e/init_test.go

@@ -261,24 +261,6 @@ var _ = Describe("podman machine init", func() {
 		Expect(output).To(Equal("/run/podman/podman.sock"))
 	})
 
-	It("init with user mode networking", func() {
-		if testProvider.VMType() != define.WSLVirt {
-			Skip("test is only supported by WSL")
-		}
-		i := new(initMachine)
-		name := randomString()
-		session, err := mb.setName(name).setCmd(i.withImagePath(mb.imagePath).withUserModeNetworking(true)).run()
-		Expect(err).ToNot(HaveOccurred())
-		Expect(session).To(Exit(0))
-
-		inspect := new(inspectMachine)
-		inspect = inspect.withFormat("{{.UserModeNetworking}}")
-		inspectSession, err := mb.setName(name).setCmd(inspect).run()
-		Expect(err).ToNot(HaveOccurred())
-		Expect(inspectSession).To(Exit(0))
-		Expect(inspectSession.outputToString()).To(Equal("true"))
-	})
-
 	It("init should cleanup on failure", func() {
 		i := new(initMachine)
 		name := randomString()

pkg/machine/e2e/init_windows_test.go

@@ -0,0 +1,78 @@
+package e2e_test
+
+import (
+	"fmt"
+	"path/filepath"
+
+	"github.com/Microsoft/go-winio/vhd"
+	"github.com/containers/libhvee/pkg/hypervctl"
+	"github.com/containers/podman/v5/pkg/machine/define"
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+	. "github.com/onsi/gomega/gexec"
+)
+
+var _ = Describe("podman machine init - windows only", func() {
+	var (
+		mb      *machineTestBuilder
+		testDir string
+	)
+
+	BeforeEach(func() {
+		testDir, mb = setup()
+	})
+	AfterEach(func() {
+		teardown(originalHomeDir, testDir, mb)
+	})
+
+	It("init with user mode networking", func() {
+		if testProvider.VMType() != define.WSLVirt {
+			Skip("test is only supported by WSL")
+		}
+		i := new(initMachine)
+		name := randomString()
+		session, err := mb.setName(name).setCmd(i.withImagePath(mb.imagePath).withUserModeNetworking(true)).run()
+		Expect(err).ToNot(HaveOccurred())
+		Expect(session).To(Exit(0))
+
+		inspect := new(inspectMachine)
+		inspect = inspect.withFormat("{{.UserModeNetworking}}")
+		inspectSession, err := mb.setName(name).setCmd(inspect).run()
+		Expect(err).ToNot(HaveOccurred())
+		Expect(inspectSession).To(Exit(0))
+		Expect(inspectSession.outputToString()).To(Equal("true"))
+	})
+	It("init should not should not overwrite existing HyperV vms", func() {
+		skipIfNotVmtype(define.HyperVVirt, "HyperV test only")
+		name := randomString()
+		vhdxPath := filepath.Join(testDir, fmt.Sprintf("%s.vhdx", name))
+		if err := vhd.CreateVhdx(vhdxPath, 1, 1); err != nil {
+			Fail(fmt.Sprintf("failed to create dummy vhdx %q: %q", vhdxPath, err))
+		}
+		vmm := hypervctl.NewVirtualMachineManager()
+		hwConfig := hypervctl.HardwareConfig{
+			CPUs:     1,
+			DiskPath: vhdxPath,
+			DiskSize: 0,
+			Memory:   0,
+			Network:  false,
+		}
+
+		if err := vmm.NewVirtualMachine(name, &hwConfig); err != nil {
+			Fail(fmt.Sprintf("failed to create vm %q: %q", name, err))
+		}
+		vm, err := vmm.GetMachine(name)
+		if err != nil {
+			Fail(fmt.Sprintf("failed to get vm %q: %q", name, err))
+		}
+		defer func() {
+			if err := vm.Remove(""); err != nil {
+				fmt.Printf("failed to clean up vm %q from hypervisor: %q /n", name, err)
+			}
+		}()
+		i := new(initMachine)
+		session, err := mb.setName(name).setCmd(i.withImagePath(mb.imagePath)).run()
+		Expect(session).To(Exit(125))
+		Expect(session.errorToString()).To(ContainSubstring("already exists on hypervisor"))
+	})
+})

pkg/machine/hyperv/stubber.go

@@ -119,7 +119,7 @@ func (h HyperVStubber) GetHyperVisorVMs() ([]string, error) {
 		return nil, err
 	}
 	for _, vm := range vms {
-		vmNames = append(vmNames, vm.Name)
+		vmNames = append(vmNames, vm.ElementName) // Note: elementname is human-readable name
 	}
 	return vmNames, nil
 }