WIP

Currently a bit stuck on getting the IPMask to `nebula.NewHostCert`.
Probably the best way would be to limit number of CIDRs to just 1 for
now, and include that in the `nebula.CACert`. Or maybe we can just
provide a way to parse it out of the `ca.crt`. Either way CIDRs should
get removed from `admin.CreationParams`.

docs/dev/daemon-process-tree.plantuml

@@ -17,7 +17,6 @@ state AppDir {
         entrypoint : * Merge given and default daemon.yml files
         entrypoint : * Copy bootstrap.tgz into $_DATA_DIR_PATH, if it's not there
         entrypoint : * Merge daemon.yml config into bootstrap.tgz
-        entrypoint : * Create $_RUNTIME_DIR_PATH/garage-N.toml\n  (one per storage allocation)
         entrypoint : * Run child processes
     }
 
@@ -42,17 +41,20 @@ state AppDir {
     entrypoint --> nebulaEntrypoint : child
     nebulaEntrypoint --> nebula : exec
 
-    state "Garage processes (only if any storage allocs are defined)" as garageChildren {
+    state "./bin/cryptic-net-main garage-entrypoint" as garageEntrypoint {
+        garageEntrypoint : * Create $_RUNTIME_DIR_PATH/garage-N.toml\n  (one per storage allocation)
+        garageEntrypoint : * Run child processes
+    }
 
     state "./bin/garage -c $_RUNTIME_DIR_PATH/garage-N.toml server" as garage
     state "./bin/garage-apply-layout-diff" as garageApplyLayoutDiff {
         garageApplyLayoutDiff : * Runs once then exits
         garageApplyLayoutDiff : * Updates cluster topo
     }
-    }
 
-    entrypoint --> garage : child (one per storage allocation)
-    entrypoint --> garageApplyLayoutDiff : child
+    entrypoint --> garageEntrypoint : child (only if >1 storage allocation defined in daemon.yml)
+    garageEntrypoint --> garage : child (one per storage allocation)
+    garageEntrypoint --> garageApplyLayoutDiff : child
 
     state "./bin/cryptic-net-main update-global-bucket" as updateGlobalBucket {
         updateGlobalBucket : * Runs once then exits

go-workspace/src/admin/admin.go

@@ -27,8 +27,8 @@ const (
 // CreationParams are general parameters used when creating a new network. These
 // are available to all hosts within the network via their bootstrap files.
 type CreationParams struct {
-	ID     string `yaml:"id"`
 	Domain string   `yaml:"domain"`
+	CIDRs  []string `yaml:"cidrs"`
 }
 
 // Admin is used for accessing all information contained within an admin.tgz.

go-workspace/src/cmd/cryptic-net-main/main.go

@@ -16,6 +16,7 @@ package main
 
 import (
 	"cryptic-net/cmd/entrypoint"
+	garage_entrypoint "cryptic-net/cmd/garage-entrypoint"
 	garage_layout_diff "cryptic-net/cmd/garage-layout-diff"
 	garage_peer_keygen "cryptic-net/cmd/garage-peer-keygen"
 	nebula_entrypoint "cryptic-net/cmd/nebula-entrypoint"
@@ -31,6 +32,7 @@ type mainFn struct {
 
 var mainFns = []mainFn{
 	{"entrypoint", entrypoint.Main},
+	{"garage-entrypoint", garage_entrypoint.Main},
 	{"garage-layout-diff", garage_layout_diff.Main},
 	{"garage-peer-keygen", garage_peer_keygen.Main},
 	{"nebula-entrypoint", nebula_entrypoint.Main},

go-workspace/src/cmd/entrypoint/admin.go

@@ -1,29 +1,16 @@
 package entrypoint
 
 import (
-	"context"
 	"cryptic-net/admin"
 	"cryptic-net/bootstrap"
 	"cryptic-net/nebula"
-	"crypto/rand"
-	"encoding/hex"
 	"errors"
 	"fmt"
 	"net"
 	"os"
 	"strings"
-
-	"github.com/cryptic-io/pmux/pmuxlib"
 )
 
-func randStr(l int) string {
-	b := make([]byte, l)
-	if _, err := rand.Read(b); err != nil {
-		panic(err)
-	}
-	return hex.EncodeToString(b)
-}
-
 func readAdmin(path string) (admin.Admin, error) {
 
 	if path == "-" {
@@ -67,9 +54,9 @@ var subCmdAdminCreateNetwork = subCmd{
 			"Domain name that should be used as the root domain in the network.",
 		)
 
-		subnetStr := flags.StringP(
-			"subnet", "s", "",
-			"CIDR which denotes the subnet that IPs hosts on the network can be assigned.",
+		ipCIDRStrs := flags.StringP(
+			"ip-cidrs", "i", "",
+			"Comma-separated list of CIDRs which denote what IPs hosts on the network can be assigned.",
 		)
 
 		if err := flags.Parse(subCmdCtx.args); err != nil {
@@ -82,27 +69,33 @@ var subCmdAdminCreateNetwork = subCmd{
 			return writeBuiltinDaemonYml(env, os.Stdout)
 		}
 
-		if *domain == "" || *subnetStr == "" {
-			return errors.New("--domain and --subnet are required")
+		if *domain == "" {
+			return errors.New("--domain is required")
 		}
 
 		*domain = strings.TrimRight(strings.TrimLeft(*domain, "."), ".")
 
-		ip, subnet, err := net.ParseCIDR(*subnetStr)
+		var (
+			ipCIDRs []*net.IPNet
+			thisIP  net.IP
+		)
+
+		for _, ipCIDRStr := range strings.Split(*ipCIDRStrs, ",") {
+
+			ipCIDRStr = strings.TrimSpace(ipCIDRStr)
+			if ipCIDRStr == "" {
+				continue
+			}
+
+			ip, ipCIDR, err := net.ParseCIDR(ipCIDRStr)
 			if err != nil {
-			return fmt.Errorf("parsing %q as a CIDR: %w", *subnetStr, err)
+				return fmt.Errorf("could not parse CIDR %q: %w", ipCIDRStr, err)
 			}
 
-		hostName := "genesis"
-
-		adminCreationParams := admin.CreationParams{
-			ID:     randStr(32),
-			Domain: *domain,
+			thisIP = ip // we just need one IP from a CIDR, it doesn't matter which.
+			ipCIDRs = append(ipCIDRs, ipCIDR)
 		}
 
-		garageRPCSecret := randStr(32)
-
-		{
 		runtimeDirPath := env.RuntimeDirPath
 
 		fmt.Fprintf(os.Stderr, "will use runtime directory %q for temporary state\n", runtimeDirPath)
@@ -117,7 +110,6 @@ var subCmdAdminCreateNetwork = subCmd{
 				fmt.Fprintf(os.Stderr, "error removing temporary directory %q: %v", runtimeDirPath, err)
 			}
 		}()
-		}
 
 		if err := writeMergedDaemonYml(env, *daemonYmlPath); err != nil {
 			return fmt.Errorf("merging and writing daemon.yml file: %w", err)
@@ -129,68 +121,6 @@ var subCmdAdminCreateNetwork = subCmd{
 			return fmt.Errorf("daemon.yml with at least 3 allocations was not provided")
 		}
 
-		nebulaCACert, err := nebula.NewCACert(*domain, subnet)
-		if err != nil {
-			return fmt.Errorf("creating nebula CA cert: %w", err)
-		}
-
-		nebulaHostCert, err := nebula.NewHostCert(nebulaCACert, hostName, ip)
-		if err != nil {
-			return fmt.Errorf("creating nebula cert for host: %w", err)
-		}
-
-		host := bootstrap.Host{
-			Name: hostName,
-			Nebula: bootstrap.NebulaHost{
-				IP: ip.String(),
-			},
-		}
-
-		env.Bootstrap = bootstrap.Bootstrap{
-			AdminCreationParams: adminCreationParams,
-			Hosts: map[string]bootstrap.Host{
-				hostName: host,
-			},
-			HostName:        hostName,
-			NebulaHostCert:  nebulaHostCert,
-			GarageRPCSecret: garageRPCSecret,
-		}
-
-		// this will also write the bootstrap file
-		if err := mergeDaemonIntoBootstrap(env); err != nil {
-			return fmt.Errorf("merging daemon.yml into bootstrap data: %w", err)
-		}
-
-		for key, val := range env.ToMap() {
-			if err := os.Setenv(key, val); err != nil {
-				return fmt.Errorf("failed to set %q to %q: %w", key, val, err)
-			}
-		}
-
-		garageChildrenPmuxProcConfigs, err := garageChildrenPmuxProcConfigs(env)
-		if err != nil {
-			return fmt.Errorf("generating garage children configs: %w", err)
-		}
-
-		pmuxConfig := pmuxlib.Config{
-			Processes: append(
-				[]pmuxlib.ProcessConfig{
-					nebulaEntrypointPmuxProcConfig(),
-					garageApplyLayoutDiffPmuxProcConfig(env),
-				},
-				garageChildrenPmuxProcConfigs...,
-			),
-		}
-
-		ctx, cancel := context.WithCancel(env.Context)
-		defer cancel()
-		pmuxDoneCh := make(chan struct{})
-
-		go func() {
-			pmuxlib.Run(ctx, pmuxConfig)
-			close(pmuxDoneCh)
-		}()
-
 	},
 }
 

go-workspace/src/cmd/entrypoint/daemon.go

@@ -5,7 +5,11 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"io"
+	"net"
 	"os"
+	"path/filepath"
+	"strconv"
 	"sync"
 	"time"
 
@@ -38,6 +42,34 @@ import (
 //
 // * (On exit) cleans up the runtime directory.
 
+func copyBootstrapToDataDir(env *crypticnet.Env, r io.Reader) error {
+
+	path := env.DataDirBootstrapPath()
+	dirPath := filepath.Dir(path)
+
+	if err := os.MkdirAll(dirPath, 0700); err != nil {
+		return fmt.Errorf("creating directory %q: %w", dirPath, err)
+	}
+
+	f, err := os.Create(path)
+	if err != nil {
+		return fmt.Errorf("creating file %q: %w", path, err)
+	}
+
+	_, err = io.Copy(f, r)
+	f.Close()
+
+	if err != nil {
+		return fmt.Errorf("copying bootstrap file to %q: %w", path, err)
+	}
+
+	if err := env.LoadBootstrap(path); err != nil {
+		return fmt.Errorf("loading bootstrap from %q: %w", path, err)
+	}
+
+	return nil
+}
+
 // creates a new bootstrap file using available information from the network. If
 // the new bootstrap file is different than the existing one, the existing one
 // is overwritten, ReloadBootstrap is called on env, true is returned.
@@ -84,31 +116,65 @@ func runDaemonPmuxOnce(env *crypticnet.Env, s3Client garage.S3APIClient) error {
 	fmt.Fprintf(os.Stderr, "host name is %q, ip is %q\n", thisHost.Name, thisHost.Nebula.IP)
 
 	pmuxProcConfigs := []pmuxlib.ProcessConfig{
-		nebulaEntrypointPmuxProcConfig(),
+		{
+			Name: "nebula",
+			Cmd:  "cryptic-net-main",
+			Args: []string{
+				"nebula-entrypoint",
+			},
+		},
 		{
 			Name: "dnsmasq",
 			Cmd:  "bash",
-			Args: waitForNebulaArgs(env, "dnsmasq-entrypoint"),
+			Args: []string{
+				"wait-for-ip",
+				thisHost.Nebula.IP,
+				"dnsmasq-entrypoint",
+			},
 		},
 	}
 
-	if len(thisDaemon.Storage.Allocations) > 0 {
+	{
+		var args []string
 
-		garageChildrenPmuxProcConfigs, err := garageChildrenPmuxProcConfigs(env)
-		if err != nil {
-			return fmt.Errorf("generating garage children configs: %w", err)
+		if allocs := thisDaemon.Storage.Allocations; len(allocs) > 0 {
+			for _, alloc := range allocs {
+				args = append(
+					args,
+					"wait-for",
+					net.JoinHostPort(thisHost.Nebula.IP, strconv.Itoa(alloc.RPCPort)),
+					"--",
+				)
+			}
+		} else {
+			args = []string{
+				"wait-for-ip",
+				thisHost.Nebula.IP,
 			}
-
-		pmuxProcConfigs = append(pmuxProcConfigs, garageChildrenPmuxProcConfigs...)
-		pmuxProcConfigs = append(pmuxProcConfigs, garageApplyLayoutDiffPmuxProcConfig(env))
 		}
 
 		pmuxProcConfigs = append(pmuxProcConfigs, pmuxlib.ProcessConfig{
 			Name:        "update-global-bucket",
 			Cmd:         "bash",
-		Args:        waitForGarageArgs(env, "update-global-bucket"),
+			Args:        append(args, "update-global-bucket"),
 			NoRestartOn: []int{0},
 		})
+	}
+
+	if len(thisDaemon.Storage.Allocations) > 0 {
+		pmuxProcConfigs = append(pmuxProcConfigs, pmuxlib.ProcessConfig{
+			Name: "garage",
+			Cmd:  "bash",
+			Args: []string{
+				"wait-for-ip",
+				thisHost.Nebula.IP,
+				"cryptic-net-main", "garage-entrypoint",
+			},
+
+			// garage can take a while to clean up
+			SigKillWait: (1 * time.Minute) + (10 * time.Second),
+		})
+	}
 
 	pmuxConfig := pmuxlib.Config{Processes: pmuxProcConfigs}
 
@@ -238,13 +304,44 @@ var subCmdDaemon = subCmd{
 			return fmt.Errorf("merging and writing daemon.yml file: %w", err)
 		}
 
+		{
 			// we update this Host's data using whatever configuration has been
 			// provided by daemon.yml. This way the daemon has the most
 			// up-to-date possible bootstrap. This updated bootstrap will later
 			// get updated in garage using update-global-bucket, so other hosts
 			// will see it as well.
-		if err := mergeDaemonIntoBootstrap(env); err != nil {
-			return fmt.Errorf("merging daemon.yml into bootstrap data: %w", err)
+
+			// ThisDaemon can only be called after writeDaemonYml.
+			daemon := env.ThisDaemon()
+			host := env.Bootstrap.ThisHost()
+
+			host.Nebula.PublicAddr = daemon.VPN.PublicAddr
+
+			host.Garage = nil
+
+			if allocs := daemon.Storage.Allocations; len(allocs) > 0 {
+
+				host.Garage = new(bootstrap.GarageHost)
+
+				for _, alloc := range allocs {
+					host.Garage.Instances = append(host.Garage.Instances, bootstrap.GarageHostInstance{
+						RPCPort:   alloc.RPCPort,
+						S3APIPort: alloc.S3APIPort,
+						WebPort:   alloc.WebPort,
+					})
+				}
+			}
+
+			env.Bootstrap.Hosts[host.Name] = host
+
+			buf := new(bytes.Buffer)
+			if err := env.Bootstrap.WithHosts(env.Bootstrap.Hosts).WriteTo(buf); err != nil {
+				return fmt.Errorf("writing new bootstrap file to buffer: %w", err)
+			}
+
+			if err := copyBootstrapToDataDir(env, buf); err != nil {
+				return fmt.Errorf("copying new bootstrap file to data dir: %w", err)
+			}
 		}
 
 		for key, val := range env.ToMap() {

go-workspace/src/cmd/entrypoint/daemon_util.go

@@ -1,205 +0,0 @@
-package entrypoint
-
-import (
-	"bytes"
-	crypticnet "cryptic-net"
-	"cryptic-net/bootstrap"
-	"cryptic-net/garage"
-	"fmt"
-	"io"
-	"net"
-	"os"
-	"path/filepath"
-	"strconv"
-	"time"
-
-	"github.com/cryptic-io/pmux/pmuxlib"
-)
-
-func copyBootstrapToDataDir(env *crypticnet.Env, r io.Reader) error {
-
-	path := env.DataDirBootstrapPath()
-	dirPath := filepath.Dir(path)
-
-	if err := os.MkdirAll(dirPath, 0700); err != nil {
-		return fmt.Errorf("creating directory %q: %w", dirPath, err)
-	}
-
-	f, err := os.Create(path)
-	if err != nil {
-		return fmt.Errorf("creating file %q: %w", path, err)
-	}
-
-	_, err = io.Copy(f, r)
-	f.Close()
-
-	if err != nil {
-		return fmt.Errorf("copying bootstrap file to %q: %w", path, err)
-	}
-
-	if err := env.LoadBootstrap(path); err != nil {
-		return fmt.Errorf("loading bootstrap from %q: %w", path, err)
-	}
-
-	return nil
-}
-
-func mergeDaemonIntoBootstrap(env *crypticnet.Env) error {
-	daemon := env.ThisDaemon()
-	host := env.Bootstrap.ThisHost()
-
-	host.Nebula.PublicAddr = daemon.VPN.PublicAddr
-
-	host.Garage = nil
-
-	if allocs := daemon.Storage.Allocations; len(allocs) > 0 {
-
-		host.Garage = new(bootstrap.GarageHost)
-
-		for _, alloc := range allocs {
-			host.Garage.Instances = append(host.Garage.Instances, bootstrap.GarageHostInstance{
-				RPCPort:   alloc.RPCPort,
-				S3APIPort: alloc.S3APIPort,
-				WebPort:   alloc.WebPort,
-			})
-		}
-	}
-
-	env.Bootstrap.Hosts[host.Name] = host
-
-	buf := new(bytes.Buffer)
-	if err := env.Bootstrap.WithHosts(env.Bootstrap.Hosts).WriteTo(buf); err != nil {
-		return fmt.Errorf("writing new bootstrap file to buffer: %w", err)
-	}
-
-	if err := copyBootstrapToDataDir(env, buf); err != nil {
-		return fmt.Errorf("copying new bootstrap file to data dir: %w", err)
-	}
-
-	return nil
-}
-
-func waitForNebulaArgs(env *crypticnet.Env, args ...string) []string {
-	thisHost := env.Bootstrap.ThisHost()
-	return append([]string{"wait-for-ip", thisHost.Nebula.IP}, args...)
-}
-
-func waitForGarageArgs(env *crypticnet.Env, args ...string) []string {
-
-	thisHost := env.Bootstrap.ThisHost()
-	allocs := env.ThisDaemon().Storage.Allocations
-
-	if len(allocs) == 0 {
-		return waitForNebulaArgs(env, args...)
-	}
-
-	var preArgs []string
-
-	for _, alloc := range allocs {
-		preArgs = append(
-			preArgs,
-			"wait-for",
-			net.JoinHostPort(thisHost.Nebula.IP, strconv.Itoa(alloc.RPCPort)),
-			"--",
-		)
-	}
-
-	return append(preArgs, args...)
-}
-
-func nebulaEntrypointPmuxProcConfig() pmuxlib.ProcessConfig {
-	return pmuxlib.ProcessConfig{
-		Name: "nebula",
-		Cmd:  "cryptic-net-main",
-		Args: []string{
-			"nebula-entrypoint",
-		},
-	}
-}
-
-func garageWriteChildConf(
-	env *crypticnet.Env,
-	alloc crypticnet.DaemonYmlStorageAllocation,
-) (
-	string, error,
-) {
-
-	if err := os.MkdirAll(alloc.MetaPath, 0750); err != nil {
-		return "", fmt.Errorf("making directory %q: %w", alloc.MetaPath, err)
-	}
-
-	thisHost := env.Bootstrap.ThisHost()
-
-	peer := garage.Peer{
-		IP:        thisHost.Nebula.IP,
-		RPCPort:   alloc.RPCPort,
-		S3APIPort: alloc.S3APIPort,
-	}
-
-	pubKey, privKey := peer.RPCPeerKey()
-
-	nodeKeyPath := filepath.Join(alloc.MetaPath, "node_key")
-	nodeKeyPubPath := filepath.Join(alloc.MetaPath, "node_keypub")
-
-	if err := os.WriteFile(nodeKeyPath, privKey, 0400); err != nil {
-		return "", fmt.Errorf("writing private key to %q: %w", nodeKeyPath, err)
-
-	} else if err := os.WriteFile(nodeKeyPubPath, pubKey, 0440); err != nil {
-		return "", fmt.Errorf("writing public key to %q: %w", nodeKeyPubPath, err)
-	}
-
-	garageTomlPath := filepath.Join(
-		env.RuntimeDirPath, fmt.Sprintf("garage-%d.toml", alloc.RPCPort),
-	)
-
-	err := garage.WriteGarageTomlFile(garageTomlPath, garage.GarageTomlData{
-		MetaPath: alloc.MetaPath,
-		DataPath: alloc.DataPath,
-
-		RPCSecret: env.Bootstrap.GarageRPCSecret,
-
-		RPCAddr: net.JoinHostPort(thisHost.Nebula.IP, strconv.Itoa(alloc.RPCPort)),
-		APIAddr: net.JoinHostPort(thisHost.Nebula.IP, strconv.Itoa(alloc.S3APIPort)),
-		WebAddr: net.JoinHostPort(thisHost.Nebula.IP, strconv.Itoa(alloc.WebPort)),
-
-		BootstrapPeers: env.Bootstrap.GarageRPCPeerAddrs(),
-	})
-
-	if err != nil {
-		return "", fmt.Errorf("creating garage.toml file at %q: %w", garageTomlPath, err)
-	}
-
-	return garageTomlPath, nil
-}
-
-func garageChildrenPmuxProcConfigs(env *crypticnet.Env) ([]pmuxlib.ProcessConfig, error) {
-
-	var pmuxProcConfigs []pmuxlib.ProcessConfig
-
-	for _, alloc := range env.ThisDaemon().Storage.Allocations {
-
-		childConfPath, err := garageWriteChildConf(env, alloc)
-
-		if err != nil {
-			return nil, fmt.Errorf("writing child config file for alloc %+v: %w", alloc, err)
-		}
-
-		pmuxProcConfigs = append(pmuxProcConfigs, pmuxlib.ProcessConfig{
-			Name:        fmt.Sprintf("garage-%d", alloc.RPCPort),
-			Cmd:         "garage",
-			Args:        []string{"-c", childConfPath, "server"},
-			SigKillWait: 1 * time.Minute,
-		})
-	}
-
-	return pmuxProcConfigs, nil
-}
-
-func garageApplyLayoutDiffPmuxProcConfig(env *crypticnet.Env) pmuxlib.ProcessConfig {
-	return pmuxlib.ProcessConfig{
-		Name:        "garage-apply-layout-diff",
-		Cmd:         "bash",
-		Args:        waitForGarageArgs(env, "bash", "garage-apply-layout-diff"),
-		NoRestartOn: []int{0},
-	}
-}

go-workspace/src/cmd/garage-entrypoint/main.go

@@ -0,0 +1,129 @@
+package garage_entrypoint
+
+import (
+	"fmt"
+	"log"
+	"net"
+	"os"
+	"path/filepath"
+	"strconv"
+	"time"
+
+	crypticnet "cryptic-net"
+	"cryptic-net/garage"
+
+	"github.com/cryptic-io/pmux/pmuxlib"
+)
+
+func writeChildConf(
+	env *crypticnet.Env,
+	alloc crypticnet.DaemonYmlStorageAllocation,
+) (string, error) {
+
+	if err := os.MkdirAll(alloc.MetaPath, 0750); err != nil {
+		return "", fmt.Errorf("making directory %q: %w", alloc.MetaPath, err)
+	}
+
+	thisHost := env.Bootstrap.ThisHost()
+
+	peer := garage.Peer{
+		IP:        thisHost.Nebula.IP,
+		RPCPort:   alloc.RPCPort,
+		S3APIPort: alloc.S3APIPort,
+	}
+
+	pubKey, privKey := peer.RPCPeerKey()
+
+	nodeKeyPath := filepath.Join(alloc.MetaPath, "node_key")
+	nodeKeyPubPath := filepath.Join(alloc.MetaPath, "node_keypub")
+
+	if err := os.WriteFile(nodeKeyPath, privKey, 0400); err != nil {
+		return "", fmt.Errorf("writing private key to %q: %w", nodeKeyPath, err)
+
+	} else if err := os.WriteFile(nodeKeyPubPath, pubKey, 0440); err != nil {
+		return "", fmt.Errorf("writing public key to %q: %w", nodeKeyPubPath, err)
+	}
+
+	garageTomlPath := filepath.Join(
+		env.RuntimeDirPath, fmt.Sprintf("garage-%d.toml", alloc.RPCPort),
+	)
+
+	err := garage.WriteGarageTomlFile(garageTomlPath, garage.GarageTomlData{
+		MetaPath: alloc.MetaPath,
+		DataPath: alloc.DataPath,
+
+		RPCSecret: env.Bootstrap.GarageRPCSecret,
+
+		RPCAddr: net.JoinHostPort(thisHost.Nebula.IP, strconv.Itoa(alloc.RPCPort)),
+		APIAddr: net.JoinHostPort(thisHost.Nebula.IP, strconv.Itoa(alloc.S3APIPort)),
+		WebAddr: net.JoinHostPort(thisHost.Nebula.IP, strconv.Itoa(alloc.WebPort)),
+
+		BootstrapPeers: env.Bootstrap.GarageRPCPeerAddrs(),
+	})
+
+	if err != nil {
+		return "", fmt.Errorf("creating garage.toml file at %q: %w", garageTomlPath, err)
+	}
+
+	return garageTomlPath, nil
+}
+
+func waitForArgs(env *crypticnet.Env, bin string, binArgs ...string) []string {
+
+	thisHost := env.Bootstrap.ThisHost()
+
+	var args []string
+
+	for _, alloc := range env.ThisDaemon().Storage.Allocations {
+		args = append(
+			args,
+			"wait-for",
+			net.JoinHostPort(thisHost.Nebula.IP, strconv.Itoa(alloc.RPCPort)),
+			"--",
+		)
+	}
+
+	args = append(args, bin)
+	args = append(args, binArgs...)
+
+	return args
+}
+
+func Main() {
+
+	env, err := crypticnet.ReadEnv()
+
+	if err != nil {
+		log.Fatalf("reading envvars: %v", err)
+	}
+
+	var pmuxProcConfigs []pmuxlib.ProcessConfig
+
+	for _, alloc := range env.ThisDaemon().Storage.Allocations {
+
+		childConfPath, err := writeChildConf(env, alloc)
+
+		if err != nil {
+			log.Fatalf("writing child config file for alloc %+v: %v", alloc, err)
+		}
+
+		log.Printf("wrote config file %q", childConfPath)
+
+		pmuxProcConfigs = append(pmuxProcConfigs, pmuxlib.ProcessConfig{
+			Name:        fmt.Sprintf("garage-%d", alloc.RPCPort),
+			Cmd:         "garage",
+			Args:        []string{"-c", childConfPath, "server"},
+			SigKillWait: 1 * time.Minute,
+		})
+
+	}
+
+	pmuxProcConfigs = append(pmuxProcConfigs, pmuxlib.ProcessConfig{
+		Name:        "garage-apply-layout-diff",
+		Cmd:         "bash",
+		Args:        waitForArgs(env, "bash", "garage-apply-layout-diff"),
+		NoRestartOn: []int{0},
+	})
+
+	pmuxlib.Run(env.Context, pmuxlib.Config{Processes: pmuxProcConfigs})
+}

go-workspace/src/nebula/nebula.go

@@ -32,7 +32,7 @@ type CACert struct {
 // NewHostCert generates a new key/cert for a nebula host using the CA key
 // which will be found in the adminFS.
 func NewHostCert(
-	caCert CACert, hostName string, ip net.IP,
+	caCert CACert, hostName, hostIP string,
 ) (
 	HostCert, error,
 ) {
@@ -57,9 +57,14 @@ func NewHostCert(
 
 	expireAt := caCrt.Details.NotAfter.Add(-1 * time.Second)
 
-	subnet := caCrt.Details.Subnets[0]
-	if !subnet.Contains(ip) {
-		return HostCert{}, fmt.Errorf("invalid ip %q, not contained by network subnet %q", ip, subnet)
+	ip := net.ParseIP(hostIP)
+	if ip == nil {
+		return HostCert{}, fmt.Errorf("invalid host ip %q", hostIP)
+	}
+
+	ipNet := &net.IPNet{
+		IP:   ip,
+		Mask: ipCIDRMask,
 	}
 
 	var hostPub, hostKey []byte
@@ -75,10 +80,7 @@ func NewHostCert(
 	hostCrt := cert.NebulaCertificate{
 		Details: cert.NebulaCertificateDetails{
 			Name:      hostName,
-			Ips: []*net.IPNet{{
-				IP:   ip,
-				Mask: subnet.Mask,
-			}},
+			Ips:       []*net.IPNet{ipNet},
 			NotBefore: time.Now(),
 			NotAfter:  expireAt,
 			PublicKey: hostPub,
@@ -111,7 +113,7 @@ func NewHostCert(
 
 // NewCACert generates a CACert. The domain should be the network's root domain,
 // and is included in the signing certificate's Name field.
-func NewCACert(domain string, subnet *net.IPNet) (CACert, error) {
+func NewCACert(domain string, ipCIDRS []*net.IPNet) (CACert, error) {
 
 	pubKey, privKey, err := ed25519.GenerateKey(rand.Reader)
 	if err != nil {
@@ -124,7 +126,7 @@ func NewCACert(domain string, subnet *net.IPNet) (CACert, error) {
 	caCrt := cert.NebulaCertificate{
 		Details: cert.NebulaCertificateDetails{
 			Name:      fmt.Sprintf("%s cryptic-net root cert", domain),
-			Subnets:   []*net.IPNet{subnet},
+			Ips:       ipCIDRS,
 			NotBefore: now,
 			NotAfter:  expireAt,
 			PublicKey: pubKey,