core -> metropolis

Smalltown is now called Metropolis!

This is the first commit in a series of cleanup commits that prepare us
for an open source release. This one just some Bazel packages around to
follow a stricter directory layout.

All of Metropolis now lives in `//metropolis`.

All of Metropolis Node code now lives in `//metropolis/node`.

All of the main /init now lives in `//m/n/core`.

All of the Kubernetes functionality/glue now lives in `//m/n/kubernetes`.

Next steps:
     - hunt down all references to Smalltown and replace them appropriately
     - narrow down visibility rules
     - document new code organization
     - move `//build/toolchain` to `//monogon/build/toolchain`
     - do another cleanup pass between `//golibs` and
       `//monogon/node/{core,common}`.
     - remove `//delta` and `//anubis`

Fixes T799.

Test Plan: Just a very large refactor. CI should help us out here.

Bug: T799

X-Origin-Diff: phab/D667
GitOrigin-RevId: 6029b8d4edc42325d50042596b639e8b122d0ded
diff --git a/metropolis/test/launch/cli/launch-multi2/BUILD.bazel b/metropolis/test/launch/cli/launch-multi2/BUILD.bazel
new file mode 100644
index 0000000..9f27860
--- /dev/null
+++ b/metropolis/test/launch/cli/launch-multi2/BUILD.bazel
@@ -0,0 +1,29 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_binary", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["main.go"],
+    importpath = "git.monogon.dev/source/nexantic.git/metropolis/test/launch/cli/launch-multi2",
+    visibility = ["//visibility:private"],
+    deps = [
+        "//metropolis/node:go_default_library",
+        "//metropolis/proto/api:go_default_library",
+        "//metropolis/test/launch:go_default_library",
+        "@com_github_grpc_ecosystem_go_grpc_middleware//retry:go_default_library",
+        "@org_golang_google_grpc//:go_default_library",
+    ],
+)
+
+go_binary(
+    name = "launch-multi2",
+    data = [
+        "//metropolis/node:image",
+        "//metropolis/node:swtpm_data",
+        "//metropolis/test/nanoswitch:initramfs",
+        "//metropolis/test/ktest:linux-testing",
+        "//third_party/edk2:firmware",
+        "@com_github_bonzini_qboot//:qboot-bin",
+    ],
+    embed = [":go_default_library"],
+    visibility = ["//visibility:public"],
+)
diff --git a/metropolis/test/launch/cli/launch-multi2/main.go b/metropolis/test/launch/cli/launch-multi2/main.go
new file mode 100644
index 0000000..265d6a0
--- /dev/null
+++ b/metropolis/test/launch/cli/launch-multi2/main.go
@@ -0,0 +1,102 @@
+// Copyright 2020 The Monogon Project Authors.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import (
+	"context"
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	grpcretry "github.com/grpc-ecosystem/go-grpc-middleware/retry"
+	"google.golang.org/grpc"
+
+	common "git.monogon.dev/source/nexantic.git/metropolis/node"
+	apb "git.monogon.dev/source/nexantic.git/metropolis/proto/api"
+	"git.monogon.dev/source/nexantic.git/metropolis/test/launch"
+)
+
+func main() {
+	sigs := make(chan os.Signal, 1)
+	signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
+	ctx, cancel := context.WithCancel(context.Background())
+	go func() {
+		<-sigs
+		cancel()
+	}()
+	sw0, vm0, err := launch.NewSocketPair()
+	if err != nil {
+		log.Fatalf("Failed to create network pipe: %v\n", err)
+	}
+	sw1, vm1, err := launch.NewSocketPair()
+	if err != nil {
+		log.Fatalf("Failed to create network pipe: %v\n", err)
+	}
+
+	go func() {
+		if err := launch.Launch(ctx, launch.Options{ConnectToSocket: vm0, SerialPort: os.Stdout}); err != nil {
+			log.Fatalf("Failed to launch vm0: %v", err)
+		}
+	}()
+	nanoswitchPortMap := make(launch.PortMap)
+	identityPorts := []uint16{
+		common.ExternalServicePort,
+		common.DebugServicePort,
+		common.KubernetesAPIPort,
+	}
+	for _, port := range identityPorts {
+		nanoswitchPortMap[port] = port
+	}
+	go func() {
+		opts := []grpcretry.CallOption{
+			grpcretry.WithBackoff(grpcretry.BackoffExponential(100 * time.Millisecond)),
+		}
+		conn, err := nanoswitchPortMap.DialGRPC(common.DebugServicePort, grpc.WithInsecure(),
+			grpc.WithUnaryInterceptor(grpcretry.UnaryClientInterceptor(opts...)))
+		if err != nil {
+			panic(err)
+		}
+		defer conn.Close()
+		debug := apb.NewNodeDebugServiceClient(conn)
+		res, err := debug.GetGoldenTicket(ctx, &apb.GetGoldenTicketRequest{
+			// HACK: this is assigned by DHCP, and we assume that everything goes well.
+			ExternalIp: "10.1.0.3",
+		}, grpcretry.WithMax(10))
+		if err != nil {
+			log.Fatalf("Failed to get golden ticket: %v", err)
+		}
+
+		ec := &apb.EnrolmentConfig{
+			GoldenTicket: res.Ticket,
+		}
+
+		if err := launch.Launch(ctx, launch.Options{ConnectToSocket: vm1, EnrolmentConfig: ec, SerialPort: os.Stdout}); err != nil {
+			log.Fatalf("Failed to launch vm1: %v", err)
+		}
+	}()
+	if err := launch.RunMicroVM(ctx, &launch.MicroVMOptions{
+		SerialPort:             os.Stdout,
+		KernelPath:             "metropolis/test/ktest/linux-testing.elf",
+		InitramfsPath:          "metropolis/test/nanoswitch/initramfs.lz4",
+		ExtraNetworkInterfaces: []*os.File{sw0, sw1},
+		PortMap:                nanoswitchPortMap,
+	}); err != nil {
+		log.Fatalf("Failed to launch nanoswitch: %v", err)
+	}
+}
diff --git a/metropolis/test/launch/cli/launch/BUILD.bazel b/metropolis/test/launch/cli/launch/BUILD.bazel
new file mode 100644
index 0000000..6b1461d
--- /dev/null
+++ b/metropolis/test/launch/cli/launch/BUILD.bazel
@@ -0,0 +1,20 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_binary", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["main.go"],
+    importpath = "git.monogon.dev/source/nexantic.git/metropolis/test/launch/cli/launch",
+    visibility = ["//visibility:private"],
+    deps = ["//metropolis/test/launch:go_default_library"],
+)
+
+go_binary(
+    name = "launch",
+    data = [
+        "//metropolis/node:image",
+        "//metropolis/node:swtpm_data",
+        "//third_party/edk2:firmware",
+    ],
+    embed = [":go_default_library"],
+    visibility = ["//visibility:public"],
+)
diff --git a/metropolis/test/launch/cli/launch/main.go b/metropolis/test/launch/cli/launch/main.go
new file mode 100644
index 0000000..852c8e1
--- /dev/null
+++ b/metropolis/test/launch/cli/launch/main.go
@@ -0,0 +1,43 @@
+// Copyright 2020 The Monogon Project Authors.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import (
+	"context"
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"git.monogon.dev/source/nexantic.git/metropolis/test/launch"
+)
+
+func main() {
+	sigs := make(chan os.Signal, 1)
+	signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
+	ctx, cancel := context.WithCancel(context.Background())
+	go func() {
+		<-sigs
+		cancel()
+	}()
+	if err := launch.Launch(ctx, launch.Options{Ports: launch.IdentityPortMap(launch.NodePorts), SerialPort: os.Stdout}); err != nil {
+		if err == ctx.Err() {
+			return
+		}
+		log.Fatalf("Failed to execute: %v\n", err)
+	}
+}