diff --git a/metropolis/cli/metroctl/BUILD.bazel b/metropolis/cli/metroctl/BUILD.bazel
index 6e75400..50dc1eb 100644
--- a/metropolis/cli/metroctl/BUILD.bazel
+++ b/metropolis/cli/metroctl/BUILD.bazel
@@ -19,6 +19,7 @@
     srcs = [
         "cmd_certs.go",
         "cmd_install.go",
+        "cmd_install_ssh.go",
         "cmd_install_usb.go",
         "cmd_k8s_configure.go",
         "cmd_k8scredplugin.go",
@@ -37,6 +38,7 @@
     deps = [
         "//go/clitable",
         "//go/logging",
+        "//go/net/ssh",
         "//metropolis/cli/flagdefs",
         "//metropolis/cli/metroctl/core",
         "//metropolis/node",
@@ -51,13 +53,19 @@
         "//osbase/logtree/proto",
         "//version",
         "@com_github_adrg_xdg//:xdg",
+        "@com_github_schollz_progressbar_v3//:progressbar",
         "@com_github_spf13_cobra//:cobra",
         "@io_bazel_rules_go//go/runfiles:go_default_library",
         "@io_k8s_apimachinery//pkg/apis/meta/v1:meta",
         "@io_k8s_client_go//pkg/apis/clientauthentication/v1:clientauthentication",
         "@org_golang_google_grpc//:grpc",
+        "@org_golang_google_protobuf//proto",
+        "@org_golang_x_crypto//ssh",
+        "@org_golang_x_crypto//ssh/agent",
+        "@org_golang_x_crypto//ssh/terminal",
         "@org_golang_x_net//proxy",
         "@org_golang_x_sync//semaphore",
+        "@org_golang_x_term//:term",
     ],
 )
 
@@ -66,6 +74,7 @@
     data = select({
         ":buildkind_lite": [],
         "//conditions:default": [
+            "//metropolis/cli/takeover",
             "//metropolis/installer:kernel",
             "//metropolis/node:bundle",
         ],
diff --git a/metropolis/cli/metroctl/cmd_install_ssh.go b/metropolis/cli/metroctl/cmd_install_ssh.go
new file mode 100644
index 0000000..15ced4a
--- /dev/null
+++ b/metropolis/cli/metroctl/cmd_install_ssh.go
@@ -0,0 +1,202 @@
+package main
+
+import (
+	"context"
+	_ "embed"
+	"fmt"
+	"log"
+	"net"
+	"net/netip"
+	"os"
+	"os/signal"
+	"strings"
+	"syscall"
+	"time"
+
+	"github.com/schollz/progressbar/v3"
+	"github.com/spf13/cobra"
+	xssh "golang.org/x/crypto/ssh"
+	"golang.org/x/crypto/ssh/agent"
+	"golang.org/x/crypto/ssh/terminal"
+	"golang.org/x/term"
+	"google.golang.org/protobuf/proto"
+
+	"source.monogon.dev/go/net/ssh"
+	"source.monogon.dev/osbase/fat32"
+)
+
+var sshCmd = &cobra.Command{
+	Use:     "ssh --disk=<disk> <target>",
+	Short:   "Installs Metropolis on a Linux system accessible via SSH.",
+	Example: "metroctl install --bundle=metropolis-v0.1.zip --takeover=takeover ssh --disk=nvme0n1 root@ssh-enabled-server.example",
+	Args:    cobra.ExactArgs(1), // One positional argument: the target
+	RunE:    doSSH,
+}
+
+func parseAddrOptionalPort(addr string) (string, string, error) {
+	if addr == "" {
+		return "", "", fmt.Errorf("address is empty")
+	}
+
+	idx := strings.LastIndex(addr, ":")
+	// IPv4, DNS without Port.
+	if idx == -1 {
+		return addr, "", nil
+	}
+
+	// IPv4, DNS with Port.
+	if strings.Count(addr, ":") == 1 {
+		return addr[:idx], addr[idx+1:], nil
+	}
+
+	// IPv6 with Port.
+	if addrPort, err := netip.ParseAddrPort(addr); err == nil {
+		return addrPort.Addr().String(), fmt.Sprintf("%d", addrPort.Port()), nil
+	}
+
+	// IPv6 without Port.
+	if addr, err := netip.ParseAddr(addr); err == nil {
+		return addr.String(), "", nil
+	}
+
+	return "", "", fmt.Errorf("failed to parse address: %q", addr)
+}
+
+func parseSSHAddr(s string) (string, string, error) {
+	user, rawAddr, ok := strings.Cut(s, "@")
+	if !ok {
+		return "", "", fmt.Errorf("SSH user is mandatory")
+	}
+
+	addr, port, err := parseAddrOptionalPort(rawAddr)
+	if err != nil {
+		return "", "", err
+	}
+	if port == "" {
+		port = "22"
+	}
+
+	return user, net.JoinHostPort(addr, port), nil
+}
+
+func doSSH(cmd *cobra.Command, args []string) error {
+	user, address, err := parseSSHAddr(args[0])
+	if err != nil {
+		return err
+	}
+
+	diskName, err := cmd.Flags().GetString("disk")
+	if err != nil {
+		return err
+	}
+
+	if len(diskName) == 0 {
+		return fmt.Errorf("flag disk is required")
+	}
+
+	var authMethods []xssh.AuthMethod
+	if aconn, err := net.Dial("unix", os.Getenv("SSH_AUTH_SOCK")); err == nil {
+		defer aconn.Close()
+		a := agent.NewClient(aconn)
+		authMethods = append(authMethods, xssh.PublicKeysCallback(a.Signers))
+	} else {
+		log.Printf("error while establishing ssh agent connection: %v", err)
+		log.Println("ssh agent authentication will not be available.")
+	}
+
+	if term.IsTerminal(int(os.Stdin.Fd())) {
+		authMethods = append(authMethods,
+			xssh.PasswordCallback(func() (string, error) {
+				fmt.Printf("%s@%s's password: ", user, address)
+				b, err := terminal.ReadPassword(syscall.Stdin)
+				if err != nil {
+					return "", err
+				}
+				fmt.Println()
+				return string(b), nil
+			}),
+			xssh.KeyboardInteractive(func(name, instruction string, questions []string, echos []bool) ([]string, error) {
+				answers := make([]string, 0, len(questions))
+				for i, q := range questions {
+					fmt.Print(q)
+					if echos[i] {
+						if _, err := fmt.Scan(&questions[i]); err != nil {
+							return nil, err
+						}
+					} else {
+						b, err := terminal.ReadPassword(syscall.Stdin)
+						if err != nil {
+							return nil, err
+						}
+						fmt.Println()
+						answers = append(answers, string(b))
+					}
+				}
+				return answers, nil
+			}),
+		)
+	} else {
+		log.Println("stdin is not interactive. password authentication will not be available.")
+	}
+
+	cl := ssh.DirectClient{
+		Username:    user,
+		AuthMethods: authMethods,
+	}
+
+	ctx, _ := signal.NotifyContext(context.Background(), os.Interrupt)
+	conn, err := cl.Dial(ctx, address, 5*time.Second)
+	if err != nil {
+		return fmt.Errorf("error while establishing ssh connection: %v", err)
+	}
+
+	params := makeNodeParams()
+	rawParams, err := proto.Marshal(params)
+	if err != nil {
+		return fmt.Errorf("error while marshaling node params: %v", err)
+	}
+
+	const takeoverTargetPath = "/root/takeover"
+	const bundleTargetPath = "/root/bundle.zip"
+	bundle := external("bundle", "_main/metropolis/node/bundle.zip", bundlePath)
+	takeover := external("takeover", "_main/metropolis/cli/takeover/takeover_bin_/takeover_bin", bundlePath)
+
+	barUploader := func(r fat32.SizedReader, targetPath string) {
+		bar := progressbar.DefaultBytes(
+			r.Size(),
+			targetPath,
+		)
+		defer bar.Close()
+
+		proxyReader := progressbar.NewReader(r, bar)
+		defer proxyReader.Close()
+
+		if err := conn.Upload(ctx, targetPath, &proxyReader); err != nil {
+			log.Fatalf("error while uploading %q: %v", targetPath, err)
+		}
+	}
+
+	log.Println("Uploading required binaries to target host.")
+	barUploader(takeover, takeoverTargetPath)
+	barUploader(bundle, bundleTargetPath)
+
+	// Start the agent and wait for the agent's output to arrive.
+	log.Printf("Starting the takeover executable at path %q.", takeoverTargetPath)
+	_, stderr, err := conn.Execute(ctx, fmt.Sprintf("%s -disk %s", takeoverTargetPath, diskName), rawParams)
+	stderrStr := strings.TrimSpace(string(stderr))
+	if stderrStr != "" {
+		log.Printf("Agent stderr: %q", stderrStr)
+	}
+	if err != nil {
+		return fmt.Errorf("while starting the takeover executable: %v", err)
+	}
+
+	return nil
+}
+
+func init() {
+	sshCmd.Flags().String("disk", "", "Which disk Metropolis should be installed to")
+	sshCmd.Flags().String("takeover", "", "Path to the Metropolis takeover binary")
+
+	installCmd.AddCommand(sshCmd)
+}
diff --git a/metropolis/cli/takeover/BUILD.bazel b/metropolis/cli/takeover/BUILD.bazel
new file mode 100644
index 0000000..b3af473
--- /dev/null
+++ b/metropolis/cli/takeover/BUILD.bazel
@@ -0,0 +1,64 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_binary", "go_library")
+load("//build/static_binary_tarball:def.bzl", "static_binary_tarball")
+load("//osbase/build:def.bzl", "node_initramfs")
+load("//osbase/build:def.bzl", "platform_transition_binary")
+
+node_initramfs(
+    name = "initramfs",
+    files = {},
+    fsspecs = [
+        "//osbase/build:earlydev.fsspec",
+        "//third_party:firmware",
+    ],
+    visibility = ["//metropolis/cli/takeover:__subpackages__"],
+)
+
+go_library(
+    name = "takeover_lib",
+    srcs = [
+        "boot.go",
+        "install.go",
+        "main.go",
+        "takeover.go",
+    ],
+    embedsrcs = [
+        "//third_party/linux",  #keep
+        "//third_party:ucode",  #keep
+        ":initramfs",  #keep
+        "//metropolis/node/core/abloader",  #keep
+    ],
+    importpath = "source.monogon.dev/metropolis/cli/takeover",
+    visibility = ["//visibility:private"],
+    deps = [
+        "//go/logging",
+        "//metropolis/node/core/devmgr",
+        "//metropolis/proto/api",
+        "//osbase/blockdev",
+        "//osbase/bootparam",
+        "//osbase/bringup",
+        "//osbase/build/mkimage/osimage",
+        "//osbase/efivarfs",
+        "//osbase/kexec",
+        "//osbase/net/dump",
+        "//osbase/net/proto",
+        "//osbase/supervisor",
+        "@com_github_cavaliergopher_cpio//:cpio",
+        "@com_github_klauspost_compress//zstd",
+        "@org_golang_google_protobuf//proto",
+        "@org_golang_x_sys//unix",
+    ],
+)
+
+go_binary(
+    name = "takeover_bin",
+    embed = [":takeover_lib"],
+    pure = "on",
+    visibility = ["//visibility:public"],
+)
+
+platform_transition_binary(
+    name = "takeover",
+    binary = ":takeover_bin",
+    target_platform = "//build/platforms:linux_amd64_static",
+    visibility = ["//visibility:public"],
+)
diff --git a/metropolis/cli/takeover/boot.go b/metropolis/cli/takeover/boot.go
new file mode 100644
index 0000000..eb71694
--- /dev/null
+++ b/metropolis/cli/takeover/boot.go
@@ -0,0 +1,47 @@
+package main
+
+import (
+	"context"
+	"os"
+	"path/filepath"
+	"time"
+
+	"golang.org/x/sys/unix"
+
+	"source.monogon.dev/metropolis/node/core/devmgr"
+	"source.monogon.dev/osbase/supervisor"
+)
+
+// Main runnable for the installer.
+func takeoverRunnable(ctx context.Context) error {
+	l := supervisor.Logger(ctx)
+
+	devmgrSvc := devmgr.New()
+	supervisor.Run(ctx, "devmgr", devmgrSvc.Run)
+	supervisor.Signal(ctx, supervisor.SignalHealthy)
+
+	for {
+		devicePath := filepath.Join("/dev", os.Getenv(EnvInstallTarget))
+		l.Infof("Waiting for device: %s", devicePath)
+		_, err := os.Stat(devicePath)
+		if os.IsNotExist(err) {
+			time.Sleep(1 * time.Second)
+			continue
+		} else if err != nil {
+			return err
+		}
+		break
+	}
+
+	if err := installMetropolis(l); err != nil {
+		l.Errorf("Installation failed: %v", err)
+	} else {
+		l.Info("Installation succeeded")
+	}
+
+	time.Sleep(1 * time.Second)
+	unix.Sync()
+	unix.Reboot(unix.LINUX_REBOOT_CMD_RESTART)
+
+	return nil
+}
diff --git a/metropolis/cli/takeover/e2e/BUILD.bazel b/metropolis/cli/takeover/e2e/BUILD.bazel
new file mode 100644
index 0000000..81ff44a
--- /dev/null
+++ b/metropolis/cli/takeover/e2e/BUILD.bazel
@@ -0,0 +1,32 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_test")
+
+go_test(
+    name = "e2e_test",
+    srcs = ["main_test.go"],
+    data = [
+        "//metropolis/cli/takeover",
+        "//metropolis/installer/test/testos:testos_bundle",
+        "//third_party/edk2:OVMF_CODE.fd",
+        "//third_party/edk2:OVMF_VARS.fd",
+        "@debian_11_cloudimage//file",
+    ],
+    x_defs = {
+        "xBundleFilePath": "$(rlocationpath //metropolis/installer/test/testos:testos_bundle )",
+        "xOvmfVarsPath": "$(rlocationpath //third_party/edk2:OVMF_VARS.fd )",
+        "xOvmfCodePath": "$(rlocationpath //third_party/edk2:OVMF_CODE.fd )",
+        "xCloudImagePath": "$(rlocationpath @debian_11_cloudimage//file )",
+        # TODO(tim): Hardcoded because of https://github.com/monogon-dev/monogon/issues/316
+        "xTakeoverPath": "_main/metropolis/cli/takeover/takeover/takeover_bin",
+    },
+    deps = [
+        "//go/net/ssh",
+        "//metropolis/proto/api",
+        "//metropolis/test/launch",
+        "//osbase/fat32",
+        "//osbase/freeport",
+        "@io_bazel_rules_go//go/runfiles:go_default_library",
+        "@org_golang_google_protobuf//proto",
+        "@org_golang_x_crypto//ssh",
+        "@org_golang_x_sys//unix",
+    ],
+)
diff --git a/metropolis/cli/takeover/e2e/main_test.go b/metropolis/cli/takeover/e2e/main_test.go
new file mode 100644
index 0000000..32d7fb8
--- /dev/null
+++ b/metropolis/cli/takeover/e2e/main_test.go
@@ -0,0 +1,229 @@
+package e2e
+
+import (
+	"bufio"
+	"context"
+	"crypto/ed25519"
+	"crypto/rand"
+	"encoding/json"
+	"fmt"
+	"net"
+	"os"
+	"os/exec"
+	"os/signal"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/bazelbuild/rules_go/go/runfiles"
+	xssh "golang.org/x/crypto/ssh"
+	"golang.org/x/sys/unix"
+	"google.golang.org/protobuf/proto"
+
+	"source.monogon.dev/metropolis/proto/api"
+
+	"source.monogon.dev/go/net/ssh"
+	"source.monogon.dev/metropolis/test/launch"
+	"source.monogon.dev/osbase/fat32"
+	"source.monogon.dev/osbase/freeport"
+)
+
+var (
+	// These are filled by bazel at linking time with the canonical path of
+	// their corresponding file. Inside the init function we resolve it
+	// with the rules_go runfiles package to the real path.
+	xBundleFilePath string
+	xOvmfVarsPath   string
+	xOvmfCodePath   string
+	xCloudImagePath string
+	xTakeoverPath   string
+)
+
+func init() {
+	var err error
+	for _, path := range []*string{
+		&xCloudImagePath, &xOvmfVarsPath, &xOvmfCodePath,
+		&xTakeoverPath, &xBundleFilePath,
+	} {
+		*path, err = runfiles.Rlocation(*path)
+		if err != nil {
+			panic(err)
+		}
+	}
+}
+
+const GiB = 1024 * 1024 * 1024
+
+func TestE2E(t *testing.T) {
+	pubKey, privKey, err := ed25519.GenerateKey(rand.Reader)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	sshPubKey, err := xssh.NewPublicKey(pubKey)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	sshPrivkey, err := xssh.NewSignerFromKey(privKey)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// CloudConfig doesn't really have a rigid spec, so just put things into it
+	cloudConfig := make(map[string]any)
+	cloudConfig["ssh_authorized_keys"] = []string{
+		strings.TrimSuffix(string(xssh.MarshalAuthorizedKey(sshPubKey)), "\n"),
+	}
+
+	userData, err := json.Marshal(cloudConfig)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	rootInode := fat32.Inode{
+		Attrs: fat32.AttrDirectory,
+		Children: []*fat32.Inode{
+			{
+				Name:    "user-data",
+				Content: strings.NewReader("#cloud-config\n" + string(userData)),
+			},
+			{
+				Name:    "meta-data",
+				Content: strings.NewReader(""),
+			},
+		},
+	}
+	cloudInitDataFile, err := os.CreateTemp("", "cidata*.img")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.Remove(cloudInitDataFile.Name())
+	if err := fat32.WriteFS(cloudInitDataFile, rootInode, fat32.Options{Label: "cidata"}); err != nil {
+		t.Fatal(err)
+	}
+
+	rootDisk, err := os.CreateTemp("", "rootdisk")
+	if err != nil {
+		t.Fatal(err)
+	}
+	// Create a 10GiB sparse root disk
+	if err := unix.Ftruncate(int(rootDisk.Fd()), 10*GiB); err != nil {
+		t.Fatalf("ftruncate failed: %v", err)
+	}
+
+	defer os.Remove(rootDisk.Name())
+
+	sshPort, sshPortCloser, err := freeport.AllocateTCPPort()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	qemuArgs := []string{
+		"-machine", "q35", "-accel", "kvm", "-nographic", "-nodefaults", "-m", "1024",
+		"-cpu", "host", "-smp", "sockets=1,cpus=1,cores=2,threads=2,maxcpus=4",
+		"-drive", "if=pflash,format=raw,readonly=on,file=" + xOvmfCodePath,
+		"-drive", "if=pflash,format=raw,snapshot=on,file=" + xOvmfVarsPath,
+		"-drive", "if=none,format=raw,cache=unsafe,id=root,file=" + rootDisk.Name(),
+		"-drive", "if=none,format=qcow2,snapshot=on,id=cloud,cache=unsafe,file=" + xCloudImagePath,
+		"-device", "virtio-blk-pci,drive=root,bootindex=1",
+		"-device", "virtio-blk-pci,drive=cloud,bootindex=2",
+		"-drive", "if=virtio,format=raw,snapshot=on,file=" + cloudInitDataFile.Name(),
+		"-netdev", fmt.Sprintf("user,id=net0,net=10.42.0.0/24,dhcpstart=10.42.0.10,hostfwd=tcp::%d-:22", sshPort),
+		"-device", "virtio-net-pci,netdev=net0,mac=22:d5:8e:76:1d:07",
+		"-device", "virtio-rng-pci",
+		"-serial", "stdio",
+	}
+	qemuCmd := exec.Command("qemu-system-x86_64", qemuArgs...)
+	stdoutPipe, err := qemuCmd.StdoutPipe()
+	if err != nil {
+		t.Fatal(err)
+	}
+	installSucceed := make(chan struct{})
+	go func() {
+		s := bufio.NewScanner(stdoutPipe)
+		for s.Scan() {
+			t.Log("kernel: " + s.Text())
+			if strings.Contains(s.Text(), "_TESTOS_LAUNCH_SUCCESS_") {
+				installSucceed <- struct{}{}
+				break
+			}
+		}
+		qemuCmd.Wait()
+	}()
+	qemuCmd.Stderr = os.Stderr
+	sshPortCloser.Close()
+	if err := qemuCmd.Start(); err != nil {
+		t.Fatal(err)
+	}
+	defer qemuCmd.Process.Kill()
+
+	cl := ssh.DirectClient{
+		Username:    "debian",
+		AuthMethods: []xssh.AuthMethod{xssh.PublicKeys(sshPrivkey)},
+	}
+
+	ctx, _ := signal.NotifyContext(context.Background(), os.Interrupt)
+
+	var conn ssh.Connection
+	for {
+		conn, err = cl.Dial(ctx, net.JoinHostPort("localhost", fmt.Sprintf("%d", sshPort)), 5*time.Second)
+		if err != nil {
+			t.Logf("error connecting via SSH, retrying: %v", err)
+			time.Sleep(1 * time.Second)
+			continue
+		}
+		break
+	}
+
+	takeover, err := os.Open(xTakeoverPath)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	const takeoverTargetPath = "/tmp/takeover"
+	if err := conn.Upload(ctx, takeoverTargetPath, takeover); err != nil {
+		t.Fatalf("error while uploading takeover: %v", err)
+	}
+
+	bundleFile, err := os.Open(xBundleFilePath)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	const bundleTargetPath = "/tmp/bundle.zip"
+	if err := conn.Upload(ctx, bundleTargetPath, bundleFile); err != nil {
+		t.Fatalf("error while uploading bundle: %v", err)
+	}
+
+	params := &api.NodeParameters{
+		Cluster: &api.NodeParameters_ClusterBootstrap_{
+			ClusterBootstrap: &api.NodeParameters_ClusterBootstrap{
+				OwnerPublicKey: launch.InsecurePublicKey,
+			},
+		},
+		NetworkConfig: nil,
+	}
+	rawParams, err := proto.Marshal(params)
+	if err != nil {
+		t.Fatalf("error while marshaling node params: %v", err)
+	}
+
+	// Start the agent and wait for the agent's output to arrive.
+	t.Logf("Starting the takeover executable at path %q.", takeoverTargetPath)
+	_, stderr, err := conn.Execute(ctx, fmt.Sprintf("sudo %s -disk %s", takeoverTargetPath, "vda"), rawParams)
+	stderrStr := strings.TrimSpace(string(stderr))
+	if stderrStr != "" {
+		t.Logf("Agent stderr: %q", stderrStr)
+	}
+	if err != nil {
+		t.Fatalf("while starting the takeover executable: %v", err)
+	}
+
+	select {
+	case <-installSucceed:
+		// Done, test passed
+	case <-time.After(30 * time.Second):
+		t.Fatal("Waiting for installation timed out")
+	}
+}
diff --git a/metropolis/cli/takeover/install.go b/metropolis/cli/takeover/install.go
new file mode 100644
index 0000000..50679d0
--- /dev/null
+++ b/metropolis/cli/takeover/install.go
@@ -0,0 +1,115 @@
+package main
+
+import (
+	"archive/zip"
+	"bytes"
+	_ "embed"
+	"fmt"
+	"io/fs"
+	"os"
+	"path/filepath"
+
+	"source.monogon.dev/go/logging"
+	"source.monogon.dev/osbase/blockdev"
+	"source.monogon.dev/osbase/build/mkimage/osimage"
+	"source.monogon.dev/osbase/efivarfs"
+)
+
+//go:embed metropolis/node/core/abloader/abloader_bin.efi
+var abloader []byte
+
+// FileSizedReader is a small adapter from fs.File to fs.SizedReader
+// Panics on Stat() failure, so should only be used with sources where Stat()
+// cannot fail.
+type FileSizedReader struct {
+	fs.File
+}
+
+func (f FileSizedReader) Size() int64 {
+	stat, err := f.Stat()
+	if err != nil {
+		panic(err)
+	}
+	return stat.Size()
+}
+
+// EnvInstallTarget environment variable which tells the takeover binary where
+// to install to
+const EnvInstallTarget = "TAKEOVER_INSTALL_TARGET"
+
+func installMetropolis(l logging.Leveled) error {
+	// Validate we are running via EFI.
+	if _, err := os.Stat("/sys/firmware/efi"); os.IsNotExist(err) {
+		//nolint:ST1005
+		return fmt.Errorf("Monogon OS can only be installed on EFI-booted machines, this one is not")
+	}
+
+	metropolisSpecRaw, err := os.ReadFile("/params.pb")
+	if err != nil {
+		return err
+	}
+
+	bundleRaw, err := os.Open("/bundle.zip")
+	if err != nil {
+		return err
+	}
+
+	bundleStat, err := bundleRaw.Stat()
+	if err != nil {
+		return err
+	}
+
+	bundle, err := zip.NewReader(bundleRaw, bundleStat.Size())
+	if err != nil {
+		return fmt.Errorf("failed to open node bundle: %w", err)
+	}
+
+	installParams, err := setupOSImageParams(bundle, metropolisSpecRaw, os.Getenv(EnvInstallTarget))
+	if err != nil {
+		return err
+	}
+
+	be, err := osimage.Write(installParams)
+	if err != nil {
+		return fmt.Errorf("failed to apply installation: %w", err)
+	}
+	bootEntryIdx, err := efivarfs.AddBootEntry(be)
+	if err != nil {
+		return fmt.Errorf("error creating EFI boot entry: %w", err)
+	}
+	if err := efivarfs.SetBootOrder(efivarfs.BootOrder{uint16(bootEntryIdx)}); err != nil {
+		return fmt.Errorf("error setting EFI boot order: %w", err)
+	}
+	l.Info("Metropolis installation completed")
+	return nil
+}
+
+func setupOSImageParams(bundle *zip.Reader, metropolisSpecRaw []byte, installTarget string) (*osimage.Params, error) {
+	rootDev, err := blockdev.Open(filepath.Join("/dev", installTarget))
+	if err != nil {
+		return nil, fmt.Errorf("failed to open root device: %w", err)
+	}
+
+	efiPayload, err := bundle.Open("kernel_efi.efi")
+	if err != nil {
+		return nil, fmt.Errorf("invalid bundle: %w", err)
+	}
+
+	systemImage, err := bundle.Open("verity_rootfs.img")
+	if err != nil {
+		return nil, fmt.Errorf("invalid bundle: %w", err)
+	}
+
+	return &osimage.Params{
+		PartitionSize: osimage.PartitionSizeInfo{
+			ESP:    384,
+			System: 4096,
+			Data:   128,
+		},
+		SystemImage:    systemImage,
+		EFIPayload:     FileSizedReader{efiPayload},
+		ABLoader:       bytes.NewReader(abloader),
+		NodeParameters: bytes.NewReader(metropolisSpecRaw),
+		Output:         rootDev,
+	}, nil
+}
diff --git a/metropolis/cli/takeover/main.go b/metropolis/cli/takeover/main.go
new file mode 100644
index 0000000..a609a63
--- /dev/null
+++ b/metropolis/cli/takeover/main.go
@@ -0,0 +1,105 @@
+package main
+
+import (
+	"flag"
+	"io"
+	"log"
+	"os"
+	"os/exec"
+	"strings"
+	"time"
+
+	"golang.org/x/sys/unix"
+
+	"source.monogon.dev/osbase/bringup"
+)
+
+// Environment variable which tells the takeover binary to run the correct stage
+const launchModeEnv = "TAKEOVER_LAUNCH_MODE"
+
+const (
+	launchModeTakeover = ""
+	launchModeDetached = "DETACHED"
+	launchModeInit     = "INIT"
+)
+
+func main() {
+	switch m := os.Getenv(launchModeEnv); m {
+	case launchModeTakeover:
+		launchTakeover()
+	case launchModeDetached:
+		launchDetached()
+	case launchModeInit:
+		launchInit()
+	default:
+		panic("unknown launch mode: " + m)
+	}
+}
+
+func launchTakeover() {
+	disk := flag.String("disk", "", "disk to install to without /dev/")
+	flag.Parse()
+	if disk == nil || *disk == "" {
+		log.Fatal("missing target disk")
+	}
+
+	nodeParamsRaw, err := io.ReadAll(os.Stdin)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	// try removing /dev/ just to be safe
+	diskName := strings.ReplaceAll(*disk, "/dev/", "")
+	warns, err := setupTakeover(nodeParamsRaw, diskName)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	if len(warns) != 0 {
+		for _, s := range warns {
+			os.Stdout.WriteString(s)
+		}
+	}
+
+	// Close stdout, we're done responding
+	os.Stdout.Close()
+
+	// Start second stage which waits for 5 seconds while performing
+	// final cleanup.
+	detachedCmd := exec.Command("/proc/self/exe")
+	detachedCmd.Env = []string{launchModeEnv + "=" + launchModeDetached}
+	if err := detachedCmd.Start(); err != nil {
+		log.Fatalf("failed to launch final stage: %v", err)
+	}
+	// Release the second stage so that the first stage can cleanly terminate.
+	if err := detachedCmd.Process.Release(); err != nil {
+		log.Fatalf("error releasing final stage process: %v", err)
+	}
+}
+
+// launchDetached executes the second stage
+func launchDetached() {
+	// Wait 5 seconds for data to be sent, connections to be closed and
+	// syncs to be executed
+	time.Sleep(5 * time.Second)
+	// Perform kexec, this will not return unless it fails
+	err := unix.Reboot(unix.LINUX_REBOOT_CMD_KEXEC)
+	msg := "takeover: reboot succeeded, but we're still runing??"
+	if err != nil {
+		msg = err.Error()
+	}
+	// We have no standard output/error anymore, if this fails it's
+	// just borked. Attempt to dump the error into kmesg for manual
+	// debugging.
+	kmsg, err := os.OpenFile("/dev/kmsg", os.O_WRONLY, 0)
+	if err != nil {
+		os.Exit(2)
+	}
+	kmsg.WriteString(msg)
+	kmsg.Close()
+	os.Exit(1)
+}
+
+func launchInit() {
+	bringup.Runnable(takeoverRunnable).Run()
+}
diff --git a/metropolis/cli/takeover/takeover.go b/metropolis/cli/takeover/takeover.go
new file mode 100644
index 0000000..327d3c1
--- /dev/null
+++ b/metropolis/cli/takeover/takeover.go
@@ -0,0 +1,221 @@
+package main
+
+import (
+	"archive/zip"
+	"bytes"
+	_ "embed"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+
+	"github.com/cavaliergopher/cpio"
+	"github.com/klauspost/compress/zstd"
+	"golang.org/x/sys/unix"
+	"google.golang.org/protobuf/proto"
+
+	apb "source.monogon.dev/metropolis/proto/api"
+	netapi "source.monogon.dev/osbase/net/proto"
+
+	"source.monogon.dev/osbase/bootparam"
+	"source.monogon.dev/osbase/build/mkimage/osimage"
+	"source.monogon.dev/osbase/kexec"
+	netdump "source.monogon.dev/osbase/net/dump"
+)
+
+//go:embed third_party/linux/bzImage
+var kernel []byte
+
+//go:embed third_party/ucode.cpio
+var ucode []byte
+
+//go:embed initramfs.cpio.zst
+var initramfs []byte
+
+// newMemfile creates a new file which is not located on a specific filesystem,
+// but is instead backed by anonymous memory.
+func newMemfile(name string, flags int) (*os.File, error) {
+	fd, err := unix.MemfdCreate(name, flags)
+	if err != nil {
+		return nil, fmt.Errorf("memfd_create failed: %w", err)
+	}
+	return os.NewFile(uintptr(fd), name), nil
+}
+
+func setupTakeover(nodeParamsRaw []byte, target string) ([]string, error) {
+	// Validate we are running via EFI.
+	if _, err := os.Stat("/sys/firmware/efi"); os.IsNotExist(err) {
+		//nolint:ST1005
+		return nil, fmt.Errorf("Monogon OS can only be installed on EFI-booted machines, this one is not")
+	}
+
+	currPath, err := os.Executable()
+	if err != nil {
+		return nil, err
+	}
+
+	bundleRaw, err := os.Open(filepath.Join(filepath.Dir(currPath), "bundle.zip"))
+	if err != nil {
+		return nil, err
+	}
+
+	bundleStat, err := bundleRaw.Stat()
+	if err != nil {
+		return nil, err
+	}
+
+	bundle, err := zip.NewReader(bundleRaw, bundleStat.Size())
+	if err != nil {
+		return nil, fmt.Errorf("failed to open node bundle: %w", err)
+	}
+
+	// Dump the current network configuration
+	netconf, warnings, err := netdump.Dump()
+	if err != nil {
+		return nil, fmt.Errorf("failed to dump network configuration: %w", err)
+	}
+
+	if len(netconf.Nameserver) == 0 {
+		netconf.Nameserver = []*netapi.Nameserver{{
+			Ip: "8.8.8.8",
+		}, {
+			Ip: "1.1.1.1",
+		}}
+	}
+
+	var params apb.NodeParameters
+	if err := proto.Unmarshal(nodeParamsRaw, &params); err != nil {
+		return nil, fmt.Errorf("failed to unmarshal node parameters: %w", err)
+	}
+
+	// Override the NodeParameters.NetworkConfig with the current NetworkConfig
+	// if it's missing.
+	if params.NetworkConfig == nil {
+		params.NetworkConfig = netconf
+	}
+
+	// Marshal NodeParameters again.
+	nodeParamsRaw, err = proto.Marshal(&params)
+	if err != nil {
+		return nil, fmt.Errorf("failed marshaling: %w", err)
+	}
+
+	oParams, err := setupOSImageParams(bundle, nodeParamsRaw, target)
+	if err != nil {
+		return nil, err
+	}
+
+	// Validate that this installation will not fail because of disk issues
+	if _, err := osimage.Plan(oParams); err != nil {
+		return nil, fmt.Errorf("failed to plan installation: %w", err)
+	}
+
+	// Load data from embedded files into memfiles as the kexec load syscall
+	// requires file descriptors.
+	kernelFile, err := newMemfile("kernel", 0)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create kernel memfile: %w", err)
+	}
+	initramfsFile, err := newMemfile("initramfs", 0)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create initramfs memfile: %w", err)
+	}
+	if _, err := kernelFile.ReadFrom(bytes.NewReader(kernel)); err != nil {
+		return nil, fmt.Errorf("failed to read kernel into memory-backed file: %w", err)
+	}
+	if _, err := initramfsFile.ReadFrom(bytes.NewReader(ucode)); err != nil {
+		return nil, fmt.Errorf("failed to read ucode into memory-backed file: %w", err)
+	}
+	if _, err := initramfsFile.ReadFrom(bytes.NewReader(initramfs)); err != nil {
+		return nil, fmt.Errorf("failed to read initramfs into memory-backed file: %w", err)
+	}
+
+	// Append this executable, the bundle and node params to initramfs
+	compressedW, err := zstd.NewWriter(initramfsFile, zstd.WithEncoderLevel(1))
+	if err != nil {
+		return nil, fmt.Errorf("while creating zstd writer: %w", err)
+	}
+	{
+		self, err := os.Open("/proc/self/exe")
+		if err != nil {
+			return nil, err
+		}
+		selfStat, err := self.Stat()
+		if err != nil {
+			return nil, err
+		}
+
+		cpioW := cpio.NewWriter(compressedW)
+		cpioW.WriteHeader(&cpio.Header{
+			Name: "/init",
+			Size: selfStat.Size(),
+			Mode: cpio.TypeReg | 0o755,
+		})
+		io.Copy(cpioW, self)
+		cpioW.Close()
+	}
+	{
+		cpioW := cpio.NewWriter(compressedW)
+		cpioW.WriteHeader(&cpio.Header{
+			Name: "/bundle.zip",
+			Size: bundleStat.Size(),
+			Mode: cpio.TypeReg | 0o644,
+		})
+		bundleRaw.Seek(0, io.SeekStart)
+		io.Copy(cpioW, bundleRaw)
+		cpioW.Close()
+	}
+	{
+		cpioW := cpio.NewWriter(compressedW)
+		cpioW.WriteHeader(&cpio.Header{
+			Name: "/params.pb",
+			Size: int64(len(nodeParamsRaw)),
+			Mode: cpio.TypeReg | 0o644,
+		})
+		cpioW.Write(nodeParamsRaw)
+		cpioW.Close()
+	}
+	compressedW.Close()
+
+	initParams := bootparam.Params{
+		bootparam.Param{Param: "quiet"},
+		bootparam.Param{Param: launchModeEnv, Value: launchModeInit},
+		bootparam.Param{Param: EnvInstallTarget, Value: target},
+		bootparam.Param{Param: "init", Value: "/init"},
+	}
+
+	var customConsoles bool
+	cmdline, err := os.ReadFile("/proc/cmdline")
+	if err != nil {
+		warnings = append(warnings, fmt.Errorf("unable to read current kernel command line: %w", err))
+	} else {
+		params, _, err := bootparam.Unmarshal(string(cmdline))
+		// If the existing command line is well-formed, add all existing console
+		// parameters to the console for the agent
+		if err == nil {
+			for _, p := range params {
+				if p.Param == "console" {
+					initParams = append(initParams, p)
+					customConsoles = true
+				}
+			}
+		}
+	}
+	if !customConsoles {
+		// Add the "default" console on x86
+		initParams = append(initParams, bootparam.Param{Param: "console", Value: "ttyS0,115200"})
+	}
+	agentCmdline, err := bootparam.Marshal(initParams, "")
+	if err != nil {
+		return nil, fmt.Errorf("failed to marshal bootparams: %w", err)
+	}
+	// Stage agent payload into kernel memory
+	if err := kexec.FileLoad(kernelFile, initramfsFile, agentCmdline); err != nil {
+		return nil, fmt.Errorf("failed to load kexec payload: %w", err)
+	}
+	var warningsStrs []string
+	for _, w := range warnings {
+		warningsStrs = append(warningsStrs, w.Error())
+	}
+	return warningsStrs, nil
+}