Move proc locking into entrypoint

This completely cleans up all logic that used to be in crypticnet.

AppDir/etc/daemon.yml

@@ -66,11 +66,18 @@ storage:
   #
   # The ports are all required and must all be unique within and across
   # allocations.
+  #
+  # THe ports are all _optional_, and will be automatically assigned if they are
+  # not specified. If ports any ports are specified then all should be
+  # specified, and each should be unique across all allocations.
+  #
+  # Once assigned (either implicitly or explicitly) the rpc_port of an
+  # allocation should not be changed.
   allocations:
 
     #- data_path: /foo/bar/data
     #  meta_path: /foo/bar/meta
     #  capacity: 1200
-    #  api_port: 3900
-    #  rpc_port: 3901
-    #  admin_port: 3902
+    #  #s3_api_port: 3900
+    #  #rpc_port:    3901
+    #  #admin_port:  3902

default.nix

@@ -57,9 +57,11 @@ in rec {
 
   entrypoint = pkgs.callPackage ./entrypoint {};
 
-  dnsmasq = (pkgs.callPackage ./dnsmasq {
+  dnsmasq = (pkgs.callPackage ./nix/dnsmasq.nix {
     glibcStatic = pkgs.glibc.static;
-  }).env;
+  });
+
+  nebula = pkgs.callPackage ./nix/nebula.nix {};
 
   garage = (pkgs.callPackage ./nix/garage.nix {}).env;
 
@@ -69,18 +71,10 @@ in rec {
     name = "cryptic-net-AppDir";
     paths = [
 
-      pkgs.pkgsStatic.bash
-      pkgs.pkgsStatic.coreutils
-      pkgs.pkgsStatic.gnutar
-      pkgs.pkgsStatic.gzip
-
-      # custom packages from ./pkgs.nix
-      pkgs.yq-go
-      pkgs.nebula
-
       ./AppDir
       version
       dnsmasq
+      nebula
       garage
       entrypoint
 

dnsmasq/bin/dnsmasq-entrypoint

@@ -1,36 +0,0 @@
-# TODO implement this in go
-
-set -e -o pipefail
-cd "$APPDIR"
-
-conf_path="$_RUNTIME_DIR_PATH"/dnsmasq.conf
-
-cat etc/dnsmasq/base.conf > "$conf_path"
-
-tmp="$(mktemp -d -t cryptic-net-dnsmasq-entrypoint-XXX)"
-
-( trap "rm -rf '$tmp'" EXIT
-
-    tar xzf "$_BOOTSTRAP_PATH" -C "$tmp" ./hosts
-
-    thisHostName=$(tar xzf "$_BOOTSTRAP_PATH" --to-stdout ./hostname)
-    thisHostIP=$(cat "$tmp"/hosts/"$thisHostName".yml | yq '.nebula.ip')
-
-    domain=$(tar xzf "$_BOOTSTRAP_PATH" --to-stdout ./admin/creation-params.yml | yq '.domain')
-
-    echo "listen-address=$thisHostIP" >> "$conf_path"
-
-    ls -1 "$tmp"/hosts | while read hostYml; do
-
-        hostName=$(echo "$hostYml" | cut -d. -f1)
-        hostIP=$(cat "$tmp"/hosts/"$hostYml" | yq '.nebula.ip')
-        echo "address=/${hostName}.hosts.$domain/$hostIP" >> "$conf_path"
-
-    done
-)
-
-cat "$_DAEMON_YML_PATH" | \
-    yq '.dns.resolvers | .[] | "server=" + .' \
-    >> "$conf_path"
-
-exec bin/dnsmasq -d -C "$conf_path"

dnsmasq/default.nix

@@ -1,39 +0,0 @@
-{
-
-  stdenv,
-  buildEnv,
-  glibcStatic,
-  rebase,
-
-}: rec {
-
-  dnsmasq = stdenv.mkDerivation rec {
-    pname = "dnsmasq";
-    version = "2.85";
-
-    src = builtins.fetchurl {
-      url = "https://www.thekelleys.org.uk/dnsmasq/${pname}-${version}.tar.xz";
-      sha256 = "sha256-rZjTgD32h+W5OAgPPSXGKP5ByHh1LQP7xhmXh/7jEvo=";
-    };
-
-    nativeBuildInputs = [ glibcStatic ];
-
-    makeFlags = [
-      "LDFLAGS=-static"
-      "DESTDIR="
-      "BINDIR=$(out)/bin"
-      "MANDIR=$(out)/man"
-      "LOCALEDIR=$(out)/share/locale"
-    ];
-  };
-
-  env = buildEnv {
-    name = "cryptic-net-dnsmasq";
-    paths = [
-      (rebase "cryptic-net-dnsmasq-bin" ./bin "bin")
-      (rebase "cryptic-net-dnsmasq-etc" ./etc "etc/dnsmasq")
-      dnsmasq
-    ];
-  };
-
-}

dnsmasq/etc/base.conf

@@ -1,41 +0,0 @@
-# Configuration file for dnsmasq.
-#
-# Format is one option per line, legal options are the same
-# as the long options legal on the command line. See
-# "/usr/sbin/dnsmasq --help" or "man 8 dnsmasq" for details.
-
-# Listen on this specific port instead of the standard DNS port
-# (53). Setting this to zero completely disables DNS function,
-# leaving only DHCP and/or TFTP.
-port=53
-
-# If you don't want dnsmasq to read /etc/resolv.conf or any other
-# file, getting its servers from this file instead (see below), then
-# uncomment this.
-no-resolv
-
-# On systems which support it, dnsmasq binds the wildcard address,
-# even when it is listening on only some interfaces. It then discards
-# requests that it shouldn't reply to. This has the advantage of
-# working even when interfaces come and go and change address. If you
-# want dnsmasq to really bind only the interfaces it is listening on,
-# uncomment this option. About the only time you may need this is when
-# running another nameserver on the same machine.
-bind-interfaces
-
-# If you don't want dnsmasq to read /etc/hosts, uncomment the
-# following line.
-no-hosts
-
-# Unset user and group so that dnsmasq doesn't drop privileges to another user.
-# If this isn't done then dnsmasq fails to start up, since it fails to access
-# /etc/passwd correctly, probably due to nix.
-user=
-group=
-
-# !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
-#
-# Everything below is generated dynamically based on runtime configuration
-#
-# !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
-

entrypoint/default.nix

@@ -7,7 +7,7 @@
   pname = "cryptic-net-entrypoint";
   version = "unstable";
   src = ./src;
-  vendorSha256 = "sha256-URmrK9Sd/5yhXrWxXZq05TS7aY7IWptQFMKfXKJY7Hc=";
+  vendorSha256 = "sha256-1mHD0tmITlGjeo6F+Dvd2TdEPzxWtndy/J+uGHWKen4=";
   subPackages = [
     "cmd/entrypoint"
   ];

entrypoint/src/bootstrap/bootstrap.go

@@ -25,6 +25,18 @@ const (
 	hostNamePath            = "hostname"
 )
 
+// DataDirPath returns the path within the user's data directory where the
+// bootstrap file is stored.
+func DataDirPath(dataDirPath string) string {
+	return filepath.Join(dataDirPath, "bootstrap.tgz")
+}
+
+// AppDirPath returns the path within the AppDir where an embedded bootstrap
+// file might be found.
+func AppDirPath(appDirPath string) string {
+	return filepath.Join(appDirPath, "share/bootstrap.tgz")
+}
+
 // Bootstrap is used for accessing all information contained within a
 // bootstrap.tgz file.
 type Bootstrap struct {

entrypoint/src/cmd/entrypoint/admin.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"cryptic-net/admin"
 	"cryptic-net/bootstrap"
+	"cryptic-net/daemon"
 	"cryptic-net/garage"
 	"cryptic-net/nebula"
 	"crypto/rand"
@@ -53,7 +54,7 @@ var subCmdAdminCreateNetwork = subCmd{
 
 		flags := subCmdCtx.flagSet(false)
 
-		daemonYmlPath := flags.StringP(
+		daemonConfigPath := flags.StringP(
 			"config-path", "c", "",
 			"Optional path to a daemon.yml file to load configuration from.",
 		)
@@ -82,10 +83,8 @@ var subCmdAdminCreateNetwork = subCmd{
 			return fmt.Errorf("parsing flags: %w", err)
 		}
 
-		env := subCmdCtx.env
-
 		if *dumpConfig {
-			return writeBuiltinDaemonYml(env, os.Stdout)
+			return daemon.CopyDefaultConfig(os.Stdout, envAppDirPath)
 		}
 
 		if *domain == "" || *subnetStr == "" || *hostName == "" {
@@ -103,36 +102,19 @@ var subCmdAdminCreateNetwork = subCmd{
 			return fmt.Errorf("invalid hostname %q: %w", *hostName, err)
 		}
 
-		adminCreationParams := admin.CreationParams{
-			ID:     randStr(32),
-			Domain: *domain,
+		runtimeDirCleanup, err := setupAndLockRuntimeDir()
+		if err != nil {
+			return fmt.Errorf("setting up runtime directory: %w", err)
+		}
+		defer runtimeDirCleanup()
+
+		daemonConfig, err := daemon.LoadConfig(envAppDirPath, *daemonConfigPath)
+		if err != nil {
+			return fmt.Errorf("loading daemon config: %w", err)
 		}
 
-		{
-			runtimeDirPath := env.RuntimeDirPath
-
-			fmt.Fprintf(os.Stderr, "will use runtime directory %q for temporary state\n", runtimeDirPath)
-
-			if err := os.MkdirAll(runtimeDirPath, 0700); err != nil {
-				return fmt.Errorf("creating directory %q: %w", runtimeDirPath, err)
-			}
-
-			defer func() {
-				fmt.Fprintf(os.Stderr, "cleaning up runtime directory %q\n", runtimeDirPath)
-				if err := os.RemoveAll(runtimeDirPath); err != nil {
-					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)
-		}
-
-		daemon := env.ThisDaemon()
-
-		if len(daemon.Storage.Allocations) < 3 {
-			return fmt.Errorf("daemon.yml with at least 3 allocations was not provided")
+		if len(daemonConfig.Storage.Allocations) < 3 {
+			return fmt.Errorf("daemon config with at least 3 allocations was not provided")
 		}
 
 		nebulaCACert, err := nebula.NewCACert(*domain, subnet)
@@ -145,7 +127,12 @@ var subCmdAdminCreateNetwork = subCmd{
 			return fmt.Errorf("creating nebula cert for host: %w", err)
 		}
 
-		env.Bootstrap = bootstrap.Bootstrap{
+		adminCreationParams := admin.CreationParams{
+			ID:     randStr(32),
+			Domain: *domain,
+		}
+
+		hostBootstrap := bootstrap.Bootstrap{
 			AdminCreationParams: adminCreationParams,
 			Hosts: map[string]bootstrap.Host{
 				*hostName: bootstrap.Host{
@@ -158,27 +145,20 @@ var subCmdAdminCreateNetwork = subCmd{
 			HostName:                           *hostName,
 			NebulaHostCert:                     nebulaHostCert,
 			GarageRPCSecret:                    randStr(32),
+			GarageAdminToken:                   randStr(32),
 			GarageGlobalBucketS3APICredentials: garage.NewS3APICredentials(),
 		}
 
-		if env, err = mergeDaemonIntoBootstrap(env); err != nil {
-			return fmt.Errorf("merging daemon.yml into bootstrap data: %w", err)
+		if hostBootstrap, err = mergeDaemonConfigIntoBootstrap(hostBootstrap, daemonConfig); err != nil {
+			return fmt.Errorf("merging daemon config into bootstrap data: %w", err)
 		}
 
-		// TODO this can be gotten rid of once nebula-entrypoint is rolled into
-		// daemon itself
-		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)
-			}
-		}
-
-		nebulaPmuxProcConfig, err := nebulaPmuxProcConfig(env)
+		nebulaPmuxProcConfig, err := nebulaPmuxProcConfig(hostBootstrap, daemonConfig)
 		if err != nil {
 			return fmt.Errorf("generating nebula config: %w", err)
 		}
 
-		garagePmuxProcConfigs, err := garagePmuxProcConfigs(env)
+		garagePmuxProcConfigs, err := garagePmuxProcConfigs(hostBootstrap, daemonConfig)
 		if err != nil {
 			return fmt.Errorf("generating garage configs: %w", err)
 		}
@@ -192,12 +172,14 @@ var subCmdAdminCreateNetwork = subCmd{
 			),
 		}
 
-		ctx, cancel := context.WithCancel(env.Context)
+		ctx, cancel := context.WithCancel(subCmdCtx.ctx)
 		pmuxDoneCh := make(chan struct{})
 
 		fmt.Fprintln(os.Stderr, "starting child processes")
 		go func() {
-			pmuxlib.Run(ctx, pmuxConfig)
+			// NOTE both stdout and stderr are sent to stderr, so that the user
+			// can pipe the resulting admin.tgz to stdout.
+			pmuxlib.Run(ctx, os.Stderr, os.Stderr, pmuxConfig)
 			close(pmuxDoneCh)
 		}()
 
@@ -208,35 +190,32 @@ var subCmdAdminCreateNetwork = subCmd{
 		}()
 
 		fmt.Fprintln(os.Stderr, "waiting for garage instances to come online")
-		if err := waitForGarageAndNebula(ctx, env); err != nil {
+		if err := waitForGarageAndNebula(ctx, hostBootstrap, daemonConfig); err != nil {
 			return fmt.Errorf("waiting for garage to start up: %w", err)
 		}
 
 		fmt.Fprintln(os.Stderr, "applying initial garage layout")
-		if err := garageApplyLayout(ctx, env); err != nil {
+		if err := garageApplyLayout(ctx, hostBootstrap, daemonConfig); err != nil {
 			return fmt.Errorf("applying initial garage layout: %w", err)
 		}
 
 		fmt.Fprintln(os.Stderr, "initializing garage shared global bucket")
-		if err := garageInitializeGlobalBucket(ctx, env); err != nil {
+		err = garageInitializeGlobalBucket(ctx, hostBootstrap, daemonConfig)
+
+		if cErr := (garage.AdminClientError{}); errors.As(err, &cErr) && cErr.StatusCode == 409 {
+			return fmt.Errorf("shared global bucket has already been created, are the storage allocations from a previously initialized cryptic-net being used?")
+
+		} else if err != nil {
 			return fmt.Errorf("initializing garage shared global bucket: %w", err)
 		}
 
-		garageS3Client := env.Bootstrap.GlobalBucketS3APIClient()
-
-		fmt.Fprintln(os.Stderr, "writing data for this host into garage")
-		err = bootstrap.PutGarageBoostrapHost(ctx, garageS3Client, env.Bootstrap.ThisHost())
-		if err != nil {
-			return fmt.Errorf("putting host data into garage: %w", err)
-		}
-
 		fmt.Fprintln(os.Stderr, "cluster initialized successfully, writing admin.tgz to stdout")
 
 		err = admin.Admin{
 			CreationParams:                     adminCreationParams,
 			NebulaCACert:                       nebulaCACert,
-			GarageRPCSecret:                    env.Bootstrap.GarageRPCSecret,
-			GarageGlobalBucketS3APICredentials: env.Bootstrap.GarageGlobalBucketS3APICredentials,
+			GarageRPCSecret:                    hostBootstrap.GarageRPCSecret,
+			GarageGlobalBucketS3APICredentials: hostBootstrap.GarageGlobalBucketS3APICredentials,
 			GarageAdminBucketS3APICredentials:  garage.NewS3APICredentials(),
 		}.WriteTo(os.Stdout)
 
@@ -274,20 +253,23 @@ var subCmdAdminMakeBootstrap = subCmd{
 			return errors.New("--name and --admin-path are required")
 		}
 
-		env := subCmdCtx.env
+		hostBootstrap, err := loadHostBootstrap()
+		if err != nil {
+			return fmt.Errorf("loading host bootstrap: %w", err)
+		}
 
 		adm, err := readAdmin(*adminPath)
 		if err != nil {
 			return fmt.Errorf("reading admin.tgz with --admin-path of %q: %w", *adminPath, err)
 		}
 
-		client := env.Bootstrap.GlobalBucketS3APIClient()
+		client := hostBootstrap.GlobalBucketS3APIClient()
 
 		// NOTE this isn't _technically_ required, but if the `hosts add`
 		// command for this host has been run recently then it might not have
 		// made it into the bootstrap file yet, and so won't be in
-		// `env.Bootstrap`.
-		hosts, err := bootstrap.GetGarageBootstrapHosts(env.Context, client)
+		// `hostBootstrap`.
+		hosts, err := bootstrap.GetGarageBootstrapHosts(subCmdCtx.ctx, client)
 		if err != nil {
 			return fmt.Errorf("retrieving host info from garage: %w", err)
 		}
@@ -307,7 +289,7 @@ var subCmdAdminMakeBootstrap = subCmd{
 			return fmt.Errorf("creating new nebula host key/cert: %w", err)
 		}
 
-		newBootstrap := bootstrap.Bootstrap{
+		newHostBootstrap := bootstrap.Bootstrap{
 			AdminCreationParams: adm.CreationParams,
 
 			Hosts:    hosts,
@@ -320,7 +302,7 @@ var subCmdAdminMakeBootstrap = subCmd{
 			GarageGlobalBucketS3APICredentials: adm.GarageGlobalBucketS3APICredentials,
 		}
 
-		return newBootstrap.WriteTo(os.Stdout)
+		return newHostBootstrap.WriteTo(os.Stdout)
 	},
 }
 
@@ -329,6 +311,7 @@ var subCmdAdmin = subCmd{
 	descr: "Sub-commands which only admins can run",
 	do: func(subCmdCtx subCmdCtx) error {
 		return subCmdCtx.doSubCmd(
+			subCmdAdminCreateNetwork,
 			subCmdAdminMakeBootstrap,
 		)
 	},

entrypoint/src/cmd/entrypoint/bootstrap_util.go

@@ -0,0 +1,44 @@
+package main
+
+import (
+	"cryptic-net/bootstrap"
+	"errors"
+	"fmt"
+	"io/fs"
+	"os"
+	"path/filepath"
+)
+
+func loadHostBootstrap() (bootstrap.Bootstrap, error) {
+
+	dataDirPath := bootstrap.DataDirPath(envDataDirPath)
+
+	hostBootstrap, err := bootstrap.FromFile(dataDirPath)
+	if errors.Is(err, fs.ErrNotExist) {
+		return bootstrap.Bootstrap{}, errors.New("%q not found, has the daemon ever been run?")
+
+	} else if err != nil {
+		return bootstrap.Bootstrap{}, fmt.Errorf("loading %q: %w", dataDirPath, err)
+	}
+
+	return hostBootstrap, nil
+}
+
+func writeBootstrapToDataDir(hostBootstrap bootstrap.Bootstrap) error {
+
+	path := bootstrap.DataDirPath(envDataDirPath)
+	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)
+	}
+
+	defer f.Close()
+
+	return hostBootstrap.WriteTo(f)
+}

entrypoint/src/cmd/entrypoint/daemon.go

@@ -5,12 +5,13 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"io/fs"
 	"os"
 	"sync"
 	"time"
 
-	crypticnet "cryptic-net"
 	"cryptic-net/bootstrap"
+	"cryptic-net/daemon"
 	"cryptic-net/garage"
 
 	"code.betamike.com/cryptic-io/pmux/pmuxlib"
@@ -25,11 +26,8 @@ import (
 // * Creates the data directory and copies the appdir bootstrap file into there,
 // if it's not already there.
 //
-// * Merges the user-provided daemon.yml file with the default, and writes the
-// result to the runtime dir.
-//
-// * Merges daemon.yml configuration into the bootstrap configuration, and
-// rewrites the bootstrap file.
+// * Merges daemon configuration into the bootstrap configuration, and rewrites
+// the bootstrap file.
 //
 // * Sets up environment variables that all other sub-processes then use, based
 // on the runtime dir.
@@ -40,108 +38,112 @@ import (
 
 // 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, env's bootstrap is reloaded, true is returned.
-func reloadBootstrap(env crypticnet.Env, s3Client garage.S3APIClient) (crypticnet.Env, bool, error) {
+// is overwritten and true is returned.
+func reloadBootstrap(
+	ctx context.Context,
+	hostBootstrap bootstrap.Bootstrap,
+	s3Client garage.S3APIClient,
+) (
+	bootstrap.Bootstrap, bool, error,
+) {
 
-	newHosts, err := bootstrap.GetGarageBootstrapHosts(env.Context, s3Client)
+	newHosts, err := bootstrap.GetGarageBootstrapHosts(ctx, s3Client)
 	if err != nil {
-		return crypticnet.Env{}, false, fmt.Errorf("getting hosts from garage: %w", err)
+		return bootstrap.Bootstrap{}, false, fmt.Errorf("getting hosts from garage: %w", err)
 	}
 
 	newHostsHash, err := bootstrap.HostsHash(newHosts)
 	if err != nil {
-		return crypticnet.Env{}, false, fmt.Errorf("calculating hash of new hosts: %w", err)
+		return bootstrap.Bootstrap{}, false, fmt.Errorf("calculating hash of new hosts: %w", err)
 	}
 
-	currHostsHash, err := bootstrap.HostsHash(env.Bootstrap.Hosts)
+	currHostsHash, err := bootstrap.HostsHash(hostBootstrap.Hosts)
 	if err != nil {
-		return crypticnet.Env{}, false, fmt.Errorf("calculating hash of current hosts: %w", err)
+		return bootstrap.Bootstrap{}, false, fmt.Errorf("calculating hash of current hosts: %w", err)
 	}
 
 	if bytes.Equal(newHostsHash, currHostsHash) {
-		return crypticnet.Env{}, false, nil
+		return hostBootstrap, false, nil
 	}
 
-	buf := new(bytes.Buffer)
-	if err := env.Bootstrap.WithHosts(newHosts).WriteTo(buf); err != nil {
-		return crypticnet.Env{}, false, fmt.Errorf("writing new bootstrap file to buffer: %w", err)
+	newHostBootstrap := hostBootstrap.WithHosts(newHosts)
+
+	if err := writeBootstrapToDataDir(newHostBootstrap); err != nil {
+		return bootstrap.Bootstrap{}, false, fmt.Errorf("writing new bootstrap.tgz to data dir: %w", err)
 	}
 
-	if env, err = copyBootstrapToDataDirAndReload(env, buf); err != nil {
-		return crypticnet.Env{}, false, fmt.Errorf("copying new bootstrap file to data dir: %w", err)
-	}
-
-	return env, true, nil
+	return newHostBootstrap, true, nil
 }
 
 // runs a single pmux process of daemon, returning only once the env.Context has
 // been canceled or bootstrap info has been changed. This will always block
-// until the spawned pmux has returned, and returns a copy of Env with updated
-// boostrap info.
-func runDaemonPmuxOnce(env crypticnet.Env) (crypticnet.Env, error) {
+// until the spawned pmux has returned, and returns a copy of hostBootstrap with
+// updated boostrap info.
+func runDaemonPmuxOnce(
+	ctx context.Context,
+	hostBootstrap bootstrap.Bootstrap,
+	daemonConfig daemon.Config,
+) (
+	bootstrap.Bootstrap, error,
+) {
 
-	thisHost := env.Bootstrap.ThisHost()
-	thisDaemon := env.ThisDaemon()
+	thisHost := hostBootstrap.ThisHost()
 	fmt.Fprintf(os.Stderr, "host name is %q, ip is %q\n", thisHost.Name, thisHost.Nebula.IP)
 
 	// create s3Client anew on every loop, in case the topology has
 	// changed and we should be connecting to a different garage
 	// endpoint.
-	s3Client := env.Bootstrap.GlobalBucketS3APIClient()
+	s3Client := hostBootstrap.GlobalBucketS3APIClient()
 
-	nebulaPmuxProcConfig, err := nebulaPmuxProcConfig(env)
+	nebulaPmuxProcConfig, err := nebulaPmuxProcConfig(hostBootstrap, daemonConfig)
 	if err != nil {
-		return crypticnet.Env{}, fmt.Errorf("generating nebula config: %w", err)
+		return bootstrap.Bootstrap{}, fmt.Errorf("generating nebula config: %w", err)
 	}
 
-	pmuxProcConfigs := []pmuxlib.ProcessConfig{
+	dnsmasqPmuxProcConfig, err := dnsmasqPmuxProcConfig(hostBootstrap, daemonConfig)
+	if err != nil {
+		return bootstrap.Bootstrap{}, fmt.Errorf("generating dnsmasq config: %w", err)
+	}
+
+	garagePmuxProcConfigs, err := garagePmuxProcConfigs(hostBootstrap, daemonConfig)
+	if err != nil {
+		return bootstrap.Bootstrap{}, fmt.Errorf("generating garage children configs: %w", err)
+	}
+
+	pmuxConfig := pmuxlib.Config{
+		Processes: append(
+			[]pmuxlib.ProcessConfig{
 				nebulaPmuxProcConfig,
-		{
-			Name: "dnsmasq",
-			Cmd:  "bash",
-			Args: []string{"dnsmasq-entrypoint"},
-			StartAfterFunc: func(ctx context.Context) error {
-				return waitForNebula(ctx, env)
-			},
+				dnsmasqPmuxProcConfig,
 			},
+			garagePmuxProcConfigs...,
+		),
 	}
 
-	if len(thisDaemon.Storage.Allocations) > 0 {
-
-		garagePmuxProcConfigs, err := garagePmuxProcConfigs(env)
-		if err != nil {
-			return crypticnet.Env{}, fmt.Errorf("generating garage children configs: %w", err)
-		}
-
-		pmuxProcConfigs = append(pmuxProcConfigs, garagePmuxProcConfigs...)
-	}
-
-	pmuxConfig := pmuxlib.Config{Processes: pmuxProcConfigs}
-
-	doneCh := env.Context.Done()
+	doneCh := ctx.Done()
 
 	var wg sync.WaitGroup
 	defer wg.Wait()
 
-	ctx, cancel := context.WithCancel(env.Context)
+	ctx, cancel := context.WithCancel(ctx)
 	defer cancel()
 
 	wg.Add(1)
 	go func() {
 		defer wg.Done()
-		pmuxlib.Run(ctx, pmuxConfig)
+		pmuxlib.Run(ctx, os.Stdout, os.Stderr, pmuxConfig)
 	}()
 
 	wg.Add(1)
 	go func() {
 		defer wg.Done()
 
-		if err := waitForGarageAndNebula(ctx, env); err != nil {
+		if err := waitForGarageAndNebula(ctx, hostBootstrap, daemonConfig); err != nil {
 			fmt.Fprintf(os.Stderr, "aborted waiting for garage instances to be accessible: %v\n", err)
 			return
 		}
 
-		thisHost := env.Bootstrap.ThisHost()
+		thisHost := hostBootstrap.ThisHost()
 
 		err := doOnce(ctx, func(ctx context.Context) error {
 			fmt.Fprintln(os.Stderr, "updating host info in garage")
@@ -153,19 +155,19 @@ func runDaemonPmuxOnce(env crypticnet.Env) (crypticnet.Env, error) {
 		}
 	}()
 
-	if len(thisDaemon.Storage.Allocations) > 0 {
+	if len(daemonConfig.Storage.Allocations) > 0 {
 		wg.Add(1)
 		go func() {
 			defer wg.Done()
 
-			if err := waitForGarageAndNebula(ctx, env); err != nil {
+			if err := waitForGarageAndNebula(ctx, hostBootstrap, daemonConfig); err != nil {
 				fmt.Fprintf(os.Stderr, "aborted waiting for garage instances to be accessible: %v\n", err)
 				return
 			}
 
 			err := doOnce(ctx, func(ctx context.Context) error {
 				fmt.Fprintln(os.Stderr, "applying garage layout")
-				return garageApplyLayout(ctx, env)
+				return garageApplyLayout(ctx, hostBootstrap, daemonConfig)
 			})
 
 			if err != nil {
@@ -181,7 +183,7 @@ func runDaemonPmuxOnce(env crypticnet.Env) (crypticnet.Env, error) {
 		select {
 
 		case <-doneCh:
-			return crypticnet.Env{}, env.Context.Err()
+			return bootstrap.Bootstrap{}, ctx.Err()
 
 		case <-ticker.C:
 
@@ -192,12 +194,12 @@ func runDaemonPmuxOnce(env crypticnet.Env) (crypticnet.Env, error) {
 				err     error
 			)
 
-			if env, changed, err = reloadBootstrap(env, s3Client); err != nil {
-				return crypticnet.Env{}, fmt.Errorf("reloading bootstrap: %w", err)
+			if hostBootstrap, changed, err = reloadBootstrap(ctx, hostBootstrap, s3Client); err != nil {
+				return bootstrap.Bootstrap{}, fmt.Errorf("reloading bootstrap: %w", err)
 
 			} else if changed {
 				fmt.Fprintln(os.Stderr, "bootstrap info has changed, restarting all processes")
-				return env, nil
+				return hostBootstrap, nil
 			}
 		}
 	}
@@ -210,7 +212,7 @@ var subCmdDaemon = subCmd{
 
 		flags := subCmdCtx.flagSet(false)
 
-		daemonYmlPath := flags.StringP(
+		daemonConfigPath := flags.StringP(
 			"config-path", "c", "",
 			"Optional path to a daemon.yml file to load configuration from.",
 		)
@@ -229,91 +231,81 @@ var subCmdDaemon = subCmd{
 			return fmt.Errorf("parsing flags: %w", err)
 		}
 
-		env := subCmdCtx.env
-
 		if *dumpConfig {
-			return writeBuiltinDaemonYml(env, os.Stdout)
+			return daemon.CopyDefaultConfig(os.Stdout, envAppDirPath)
 		}
 
-		runtimeDirPath := env.RuntimeDirPath
+		runtimeDirCleanup, err := setupAndLockRuntimeDir()
+		if err != nil {
+			return fmt.Errorf("setting up runtime directory: %w", err)
+		}
+		defer runtimeDirCleanup()
 
-		fmt.Fprintf(os.Stderr, "will use runtime directory %q for temporary state\n", runtimeDirPath)
+		var (
+			bootstrapDataDirPath = bootstrap.DataDirPath(envDataDirPath)
+			bootstrapAppDirPath  = bootstrap.AppDirPath(envAppDirPath)
 
-		if err := os.MkdirAll(runtimeDirPath, 0700); err != nil {
-			return fmt.Errorf("creating directory %q: %w", runtimeDirPath, err)
+			hostBootstrapPath  string
+			hostBootstrap      bootstrap.Bootstrap
+			foundHostBootstrap bool
+		)
 
-		} else if err := crypticnet.NewProcLock(runtimeDirPath).WriteLock(); err != nil {
-			return err
+		tryLoadBootstrap := func(path string) bool {
+
+			if err != nil {
+				return false
+
+			} else if hostBootstrap, err = bootstrap.FromFile(path); errors.Is(err, fs.ErrNotExist) {
+				err = nil
+				return false
+
+			} else if err != nil {
+				err = fmt.Errorf("parsing bootstrap.tgz at %q: %w", path, err)
+				return false
 			}
 
-		// do not defer the cleaning of the runtime directory until the lock has
-		// been obtained, otherwise we might delete the directory out from under
-		// the feet of an already running daemon
-		defer func() {
-			fmt.Fprintf(os.Stderr, "cleaning up runtime directory %q\n", runtimeDirPath)
-			if err := os.RemoveAll(runtimeDirPath); err != nil {
-				fmt.Fprintf(os.Stderr, "error removing temporary directory %q: %v", runtimeDirPath, err)
+			hostBootstrapPath = path
+			return true
 		}
-		}()
 
-		// If the bootstrap file is not being stored in the data dir, move it
-		// there and reload the bootstrap info
-		if env.BootstrapPath != env.DataDirBootstrapPath() {
+		foundHostBootstrap = tryLoadBootstrap(bootstrapDataDirPath)
+		foundHostBootstrap = !foundHostBootstrap && *bootstrapPath != "" && tryLoadBootstrap(*bootstrapPath)
+		foundHostBootstrap = !foundHostBootstrap && tryLoadBootstrap(bootstrapAppDirPath)
 
-			path := env.BootstrapPath
+		if err != nil {
+			return fmt.Errorf("attempting to load bootstrap.tgz file: %w", err)
 
-			// If there's no BootstrapPath then no bootstrap file could be
-			// found. In this case we require the user to provide one on the
-			// command-line.
-			if path == "" {
-
-				if *bootstrapPath == "" {
+		} else if !foundHostBootstrap {
 			return errors.New("No bootstrap.tgz file could be found, and one is not provided with --bootstrap-path")
+
+		} else if hostBootstrapPath != bootstrapDataDirPath {
+
+			// If the bootstrap file is not being stored in the data dir, copy
+			// it there, so it can be loaded from there next time.
+			if err := writeBootstrapToDataDir(hostBootstrap); err != nil {
+				return fmt.Errorf("writing bootstrap.tgz to data dir: %w", err)
+			}
 		}
 
-				path = *bootstrapPath
-			}
-
-			f, err := os.Open(path)
+		daemonConfig, err := daemon.LoadConfig(envAppDirPath, *daemonConfigPath)
 		if err != nil {
-				return fmt.Errorf("opening file %q: %w", env.BootstrapPath, err)
+			return fmt.Errorf("loading daemon config: %w", err)
 		}
 
-			env, err = copyBootstrapToDataDirAndReload(env, f)
-			f.Close()
-
-			if err != nil {
-				return fmt.Errorf("copying bootstrap file from %q: %w", path, err)
-			}
-		}
-
-		if err := writeMergedDaemonYml(env, *daemonYmlPath); err != nil {
-			return fmt.Errorf("merging and writing daemon.yml file: %w", err)
-		}
-
-		var err error
-
 		// 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 env, err = mergeDaemonIntoBootstrap(env); err != nil {
-			return fmt.Errorf("merging daemon.yml into bootstrap data: %w", err)
-		}
-
-		// TODO once dnsmasq entrypoint is written in go and the config
-		// generation is inlined into this process then this Setenv won't be
-		// necessary.
-		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)
-			}
+		// provided by the daemon config. This way the daemon has the most
+		// up-to-date possible bootstrap. This updated bootstrap will later get
+		// updated in garage using bootstrap.PutGarageBoostrapHost, so other
+		// hosts will see it as well.
+		if hostBootstrap, err = mergeDaemonConfigIntoBootstrap(hostBootstrap, daemonConfig); err != nil {
+			return fmt.Errorf("merging daemon config into bootstrap data: %w", err)
 		}
 
 		for {
 
-			if env, err = runDaemonPmuxOnce(env); errors.Is(err, context.Canceled) {
+			hostBootstrap, err = runDaemonPmuxOnce(subCmdCtx.ctx, hostBootstrap, daemonConfig)
+
+			if errors.Is(err, context.Canceled) {
 				return nil
 
 			} else if err != nil {

entrypoint/src/cmd/entrypoint/daemon_util.go

@@ -1,50 +1,26 @@
 package main
 
 import (
-	"bytes"
 	"context"
-	crypticnet "cryptic-net"
 	"cryptic-net/bootstrap"
+	"cryptic-net/daemon"
 	"fmt"
-	"io"
-	"os"
-	"path/filepath"
 	"time"
 )
 
-func copyBootstrapToDataDirAndReload(env crypticnet.Env, r io.Reader) (crypticnet.Env, error) {
+func mergeDaemonConfigIntoBootstrap(
+	hostBootstrap bootstrap.Bootstrap,
+	daemonConfig daemon.Config,
+) (
+	bootstrap.Bootstrap, error,
+) {
+	host := hostBootstrap.ThisHost()
 
-	path := env.DataDirBootstrapPath()
-	dirPath := filepath.Dir(path)
-
-	if err := os.MkdirAll(dirPath, 0700); err != nil {
-		return crypticnet.Env{}, fmt.Errorf("creating directory %q: %w", dirPath, err)
-	}
-
-	f, err := os.Create(path)
-	if err != nil {
-		return crypticnet.Env{}, fmt.Errorf("creating file %q: %w", path, err)
-	}
-
-	_, err = io.Copy(f, r)
-	f.Close()
-
-	if err != nil {
-		return crypticnet.Env{}, fmt.Errorf("copying bootstrap file to %q: %w", path, err)
-	}
-
-	return env.LoadBootstrap(path)
-}
-
-func mergeDaemonIntoBootstrap(env crypticnet.Env) (crypticnet.Env, error) {
-	daemon := env.ThisDaemon()
-	host := env.Bootstrap.ThisHost()
-
-	host.Nebula.PublicAddr = daemon.VPN.PublicAddr
+	host.Nebula.PublicAddr = daemonConfig.VPN.PublicAddr
 
 	host.Garage = nil
 
-	if allocs := daemon.Storage.Allocations; len(allocs) > 0 {
+	if allocs := daemonConfig.Storage.Allocations; len(allocs) > 0 {
 
 		host.Garage = new(bootstrap.GarageHost)
 
@@ -56,14 +32,13 @@ func mergeDaemonIntoBootstrap(env crypticnet.Env) (crypticnet.Env, error) {
 		}
 	}
 
-	env.Bootstrap.Hosts[host.Name] = host
+	hostBootstrap.Hosts[host.Name] = host
 
-	buf := new(bytes.Buffer)
-	if err := env.Bootstrap.WithHosts(env.Bootstrap.Hosts).WriteTo(buf); err != nil {
-		return crypticnet.Env{}, fmt.Errorf("writing new bootstrap file to buffer: %w", err)
+	if err := writeBootstrapToDataDir(hostBootstrap); err != nil {
+		return bootstrap.Bootstrap{}, fmt.Errorf("writing bootstrap file: %w", err)
 	}
 
-	return copyBootstrapToDataDirAndReload(env, buf)
+	return hostBootstrap, nil
 }
 
 func doOnce(ctx context.Context, fn func(context.Context) error) error {

entrypoint/src/cmd/entrypoint/daemon_yml.go

@@ -1,72 +0,0 @@
-package main
-
-import (
-	crypticnet "cryptic-net"
-	"cryptic-net/yamlutil"
-	"fmt"
-	"io"
-	"io/ioutil"
-	"os"
-	"path/filepath"
-
-	"github.com/imdario/mergo"
-	"gopkg.in/yaml.v3"
-)
-
-func builtinDaemonYmlPath(env crypticnet.Env) string {
-	return filepath.Join(env.AppDirPath, "etc", "daemon.yml")
-}
-
-func writeBuiltinDaemonYml(env crypticnet.Env, w io.Writer) error {
-
-	builtinDaemonYmlPath := builtinDaemonYmlPath(env)
-
-	builtinDaemonYml, err := os.ReadFile(builtinDaemonYmlPath)
-	if err != nil {
-		return fmt.Errorf("reading default daemon.yml at %q: %w", builtinDaemonYmlPath, err)
-	}
-
-	if _, err := w.Write(builtinDaemonYml); err != nil {
-		return fmt.Errorf("writing default daemon.yml: %w", err)
-	}
-
-	return nil
-}
-
-func writeMergedDaemonYml(env crypticnet.Env, userDaemonYmlPath string) error {
-
-	builtinDaemonYmlPath := builtinDaemonYmlPath(env)
-
-	var fullDaemonYml map[string]interface{}
-
-	if err := yamlutil.LoadYamlFile(&fullDaemonYml, builtinDaemonYmlPath); err != nil {
-		return fmt.Errorf("parsing builtin daemon.yml file: %w", err)
-	}
-
-	if userDaemonYmlPath != "" {
-
-		var daemonYml map[string]interface{}
-		if err := yamlutil.LoadYamlFile(&daemonYml, userDaemonYmlPath); err != nil {
-			return fmt.Errorf("parsing %q: %w", userDaemonYmlPath, err)
-		}
-
-		err := mergo.Merge(&fullDaemonYml, daemonYml, mergo.WithOverride)
-		if err != nil {
-			return fmt.Errorf("merging contents of file %q: %w", userDaemonYmlPath, err)
-		}
-	}
-
-	fullDaemonYmlB, err := yaml.Marshal(fullDaemonYml)
-
-	if err != nil {
-		return fmt.Errorf("yaml marshaling daemon config: %w", err)
-	}
-
-	daemonYmlPath := filepath.Join(env.RuntimeDirPath, "daemon.yml")
-
-	if err := ioutil.WriteFile(daemonYmlPath, fullDaemonYmlB, 0400); err != nil {
-		return fmt.Errorf("writing daemon.yml file to %q: %w", daemonYmlPath, err)
-	}
-
-	return nil
-}

entrypoint/src/cmd/entrypoint/dnsmasq_util.go

@@ -0,0 +1,48 @@
+package main
+
+import (
+	"cryptic-net/bootstrap"
+	"cryptic-net/daemon"
+	"cryptic-net/dnsmasq"
+	"fmt"
+	"path/filepath"
+	"sort"
+
+	"code.betamike.com/cryptic-io/pmux/pmuxlib"
+)
+
+func dnsmasqPmuxProcConfig(
+	hostBootstrap bootstrap.Bootstrap,
+	daemonConfig daemon.Config,
+) (
+	pmuxlib.ProcessConfig, error,
+) {
+
+	confPath := filepath.Join(envRuntimeDirPath, "dnsmasq.conf")
+
+	hostsSlice := make([]bootstrap.Host, 0, len(hostBootstrap.Hosts))
+	for _, host := range hostBootstrap.Hosts {
+		hostsSlice = append(hostsSlice, host)
+	}
+
+	sort.Slice(hostsSlice, func(i, j int) bool {
+		return hostsSlice[i].Nebula.IP < hostsSlice[j].Nebula.IP
+	})
+
+	confData := dnsmasq.ConfData{
+		Resolvers: daemonConfig.DNS.Resolvers,
+		Domain:    hostBootstrap.AdminCreationParams.Domain,
+		IP:        hostBootstrap.ThisHost().Nebula.IP,
+		Hosts:     hostsSlice,
+	}
+
+	if err := dnsmasq.WriteConfFile(confPath, confData); err != nil {
+		return pmuxlib.ProcessConfig{}, fmt.Errorf("writing dnsmasq.conf to %q: %w", confPath, err)
+	}
+
+	return pmuxlib.ProcessConfig{
+		Name: "dnsmasq",
+		Cmd:  "dnsmasq",
+		Args: []string{"-d", "-C", confPath},
+	}, nil
+}

entrypoint/src/cmd/entrypoint/garage.go

@@ -28,18 +28,21 @@ var subCmdGarageMC = subCmd{
 			return fmt.Errorf("parsing flags: %w", err)
 		}
 
-		env := subCmdCtx.env
+		hostBootstrap, err := loadHostBootstrap()
+		if err != nil {
+			return fmt.Errorf("loading host bootstrap: %w", err)
+		}
 
-		s3APIAddr := env.Bootstrap.ChooseGaragePeer().S3APIAddr()
+		s3APIAddr := hostBootstrap.ChooseGaragePeer().S3APIAddr()
 
 		if *keyID == "" || *keySecret == "" {
 
 			if *keyID == "" {
-				*keyID = env.Bootstrap.GarageGlobalBucketS3APICredentials.ID
+				*keyID = hostBootstrap.GarageGlobalBucketS3APICredentials.ID
 			}
 
 			if *keySecret == "" {
-				*keyID = env.Bootstrap.GarageGlobalBucketS3APICredentials.Secret
+				*keyID = hostBootstrap.GarageGlobalBucketS3APICredentials.Secret
 			}
 		}
 
@@ -52,7 +55,7 @@ var subCmdGarageMC = subCmd{
 		args = append([]string{"mc"}, args...)
 
 		var (
-			binPath = env.BinPath("mc")
+			binPath = "mc"
 			cliEnv  = append(
 				os.Environ(),
 				fmt.Sprintf(
@@ -83,15 +86,18 @@ var subCmdGarageCLI = subCmd{
 	checkLock: true,
 	do: func(subCmdCtx subCmdCtx) error {
 
-		env := subCmdCtx.env
+		hostBootstrap, err := loadHostBootstrap()
+		if err != nil {
+			return fmt.Errorf("loading host bootstrap: %w", err)
+		}
 
 		var (
-			binPath = env.BinPath("garage")
+			binPath = "garage"
 			args    = append([]string{"garage"}, subCmdCtx.args...)
 			cliEnv  = append(
 				os.Environ(),
-				"GARAGE_RPC_HOST="+env.Bootstrap.ChooseGaragePeer().RPCAddr(),
-				"GARAGE_RPC_SECRET="+env.Bootstrap.GarageRPCSecret,
+				"GARAGE_RPC_HOST="+hostBootstrap.ChooseGaragePeer().RPCAddr(),
+				"GARAGE_RPC_SECRET="+hostBootstrap.GarageRPCSecret,
 			)
 		)
 

entrypoint/src/cmd/entrypoint/garage_util.go

@@ -2,7 +2,8 @@ package main
 
 import (
 	"context"
-	crypticnet "cryptic-net"
+	"cryptic-net/bootstrap"
+	"cryptic-net/daemon"
 	"cryptic-net/garage"
 	"fmt"
 	"net"
@@ -13,26 +14,47 @@ import (
 	"code.betamike.com/cryptic-io/pmux/pmuxlib"
 )
 
-func waitForGarageAndNebula(ctx context.Context, env crypticnet.Env) error {
+// newGarageAdminClient will return an AdminClient for a local garage instance,
+// or it will _panic_ if there is no local instance configured.
+func newGarageAdminClient(
+	hostBootstrap bootstrap.Bootstrap, daemonConfig daemon.Config,
+) *garage.AdminClient {
 
-	allocs := env.ThisDaemon().Storage.Allocations
+	thisHost := hostBootstrap.ThisHost()
+
+	return garage.NewAdminClient(
+		net.JoinHostPort(
+			thisHost.Nebula.IP,
+			strconv.Itoa(daemonConfig.Storage.Allocations[0].AdminPort),
+		),
+		hostBootstrap.GarageAdminToken,
+	)
+}
+
+func waitForGarageAndNebula(
+	ctx context.Context,
+	hostBootstrap bootstrap.Bootstrap,
+	daemonConfig daemon.Config,
+) error {
+
+	allocs := daemonConfig.Storage.Allocations
 
 	// if this host doesn't have any allocations specified then fall back to
 	// waiting for nebula
 	if len(allocs) == 0 {
-		return waitForNebula(ctx, env)
+		return waitForNebula(ctx, hostBootstrap)
 	}
 
 	for _, alloc := range allocs {
 
 		adminAddr := net.JoinHostPort(
-			env.Bootstrap.ThisHost().Nebula.IP,
+			hostBootstrap.ThisHost().Nebula.IP,
 			strconv.Itoa(alloc.AdminPort),
 		)
 
 		adminClient := garage.NewAdminClient(
 			adminAddr,
-			env.Bootstrap.GarageAdminToken,
+			hostBootstrap.GarageAdminToken,
 		)
 
 		if err := adminClient.Wait(ctx); err != nil {
@@ -44,9 +66,9 @@ func waitForGarageAndNebula(ctx context.Context, env crypticnet.Env) error {
 
 }
 
-func garageWriteChildConf(
-	env crypticnet.Env,
-	alloc crypticnet.DaemonYmlStorageAllocation,
+func garageWriteChildConfig(
+	hostBootstrap bootstrap.Bootstrap,
+	alloc daemon.ConfigStorageAllocation,
 ) (
 	string, error,
 ) {
@@ -55,7 +77,7 @@ func garageWriteChildConf(
 		return "", fmt.Errorf("making directory %q: %w", alloc.MetaPath, err)
 	}
 
-	thisHost := env.Bootstrap.ThisHost()
+	thisHost := hostBootstrap.ThisHost()
 
 	peer := garage.Peer{
 		IP:        thisHost.Nebula.IP,
@@ -76,21 +98,21 @@ func garageWriteChildConf(
 	}
 
 	garageTomlPath := filepath.Join(
-		env.RuntimeDirPath, fmt.Sprintf("garage-%d.toml", alloc.RPCPort),
+		envRuntimeDirPath, fmt.Sprintf("garage-%d.toml", alloc.RPCPort),
 	)
 
 	err := garage.WriteGarageTomlFile(garageTomlPath, garage.GarageTomlData{
 		MetaPath: alloc.MetaPath,
 		DataPath: alloc.DataPath,
 
-		RPCSecret:  env.Bootstrap.GarageRPCSecret,
-		AdminToken: env.Bootstrap.GarageAdminToken,
+		RPCSecret:  hostBootstrap.GarageRPCSecret,
+		AdminToken: hostBootstrap.GarageAdminToken,
 
 		RPCAddr:   net.JoinHostPort(thisHost.Nebula.IP, strconv.Itoa(alloc.RPCPort)),
 		APIAddr:   net.JoinHostPort(thisHost.Nebula.IP, strconv.Itoa(alloc.S3APIPort)),
 		AdminAddr: net.JoinHostPort(thisHost.Nebula.IP, strconv.Itoa(alloc.AdminPort)),
 
-		BootstrapPeers: env.Bootstrap.GarageRPCPeerAddrs(),
+		BootstrapPeers: hostBootstrap.GarageRPCPeerAddrs(),
 	})
 
 	if err != nil {
@@ -100,13 +122,18 @@ func garageWriteChildConf(
 	return garageTomlPath, nil
 }
 
-func garagePmuxProcConfigs(env crypticnet.Env) ([]pmuxlib.ProcessConfig, error) {
+func garagePmuxProcConfigs(
+	hostBootstrap bootstrap.Bootstrap,
+	daemonConfig daemon.Config,
+) (
+	[]pmuxlib.ProcessConfig, error,
+) {
 
 	var pmuxProcConfigs []pmuxlib.ProcessConfig
 
-	for _, alloc := range env.ThisDaemon().Storage.Allocations {
+	for _, alloc := range daemonConfig.Storage.Allocations {
 
-		childConfPath, err := garageWriteChildConf(env, alloc)
+		childConfigPath, err := garageWriteChildConfig(hostBootstrap, alloc)
 
 		if err != nil {
 			return nil, fmt.Errorf("writing child config file for alloc %+v: %w", alloc, err)
@@ -115,9 +142,9 @@ func garagePmuxProcConfigs(env crypticnet.Env) ([]pmuxlib.ProcessConfig, error)
 		pmuxProcConfigs = append(pmuxProcConfigs, pmuxlib.ProcessConfig{
 			Name: fmt.Sprintf("garage-%d", alloc.RPCPort),
 			Cmd:  "garage",
-			Args: []string{"-c", childConfPath, "server"},
+			Args: []string{"-c", childConfigPath, "server"},
 			StartAfterFunc: func(ctx context.Context) error {
-				return waitForNebula(ctx, env)
+				return waitForNebula(ctx, hostBootstrap)
 			},
 		})
 	}
@@ -125,11 +152,15 @@ func garagePmuxProcConfigs(env crypticnet.Env) ([]pmuxlib.ProcessConfig, error)
 	return pmuxProcConfigs, nil
 }
 
-func garageInitializeGlobalBucket(ctx context.Context, env crypticnet.Env) error {
+func garageInitializeGlobalBucket(
+	ctx context.Context,
+	hostBootstrap bootstrap.Bootstrap,
+	daemonConfig daemon.Config,
+) error {
 
 	var (
-		adminClient       = env.GarageAdminClient()
-		globalBucketCreds = env.Bootstrap.GarageGlobalBucketS3APICredentials
+		adminClient       = newGarageAdminClient(hostBootstrap, daemonConfig)
+		globalBucketCreds = hostBootstrap.GarageGlobalBucketS3APICredentials
 	)
 
 	// first attempt to import the key
@@ -183,14 +214,18 @@ func garageInitializeGlobalBucket(ctx context.Context, env crypticnet.Env) error
 	return nil
 }
 
-func garageApplyLayout(ctx context.Context, env crypticnet.Env) error {
+func garageApplyLayout(
+	ctx context.Context,
+	hostBootstrap bootstrap.Bootstrap,
+	daemonConfig daemon.Config,
+) error {
 
 	var (
-		adminClient = env.GarageAdminClient()
-		thisHost    = env.Bootstrap.ThisHost()
+		adminClient = newGarageAdminClient(hostBootstrap, daemonConfig)
+		thisHost    = hostBootstrap.ThisHost()
 		hostName    = thisHost.Name
 		ip          = thisHost.Nebula.IP
-		allocs      = env.ThisDaemon().Storage.Allocations
+		allocs      = daemonConfig.Storage.Allocations
 	)
 
 	type peerLayout struct {
@@ -213,6 +248,7 @@ func garageApplyLayout(ctx context.Context, env crypticnet.Env) error {
 			clusterLayout[peer.RPCPeerID()] = peerLayout{
 				Capacity: alloc.Capacity / 100,
 				Zone:     hostName,
+				Tags:     []string{},
 			}
 		}
 

entrypoint/src/cmd/entrypoint/hosts.go

@@ -59,8 +59,12 @@ var subCmdHostsAdd = subCmd{
 
 		// TODO validate that the IP is in the correct CIDR
 
-		env := subCmdCtx.env
-		client := env.Bootstrap.GlobalBucketS3APIClient()
+		hostBootstrap, err := loadHostBootstrap()
+		if err != nil {
+			return fmt.Errorf("loading host bootstrap: %w", err)
+		}
+
+		client := hostBootstrap.GlobalBucketS3APIClient()
 
 		host := bootstrap.Host{
 			Name: *name,
@@ -69,7 +73,7 @@ var subCmdHostsAdd = subCmd{
 			},
 		}
 
-		return bootstrap.PutGarageBoostrapHost(env.Context, client, host)
+		return bootstrap.PutGarageBoostrapHost(subCmdCtx.ctx, client, host)
 	},
 }
 
@@ -79,11 +83,14 @@ var subCmdHostsList = subCmd{
 	checkLock: true,
 	do: func(subCmdCtx subCmdCtx) error {
 
-		env := subCmdCtx.env
+		hostBootstrap, err := loadHostBootstrap()
+		if err != nil {
+			return fmt.Errorf("loading host bootstrap: %w", err)
+		}
 
-		client := env.Bootstrap.GlobalBucketS3APIClient()
+		client := hostBootstrap.GlobalBucketS3APIClient()
 
-		hostsMap, err := bootstrap.GetGarageBootstrapHosts(env.Context, client)
+		hostsMap, err := bootstrap.GetGarageBootstrapHosts(subCmdCtx.ctx, client)
 		if err != nil {
 			return fmt.Errorf("retrieving hosts from garage: %w", err)
 		}
@@ -120,10 +127,14 @@ var subCmdHostsDelete = subCmd{
 			return errors.New("--name is required")
 		}
 
-		env := subCmdCtx.env
-		client := env.Bootstrap.GlobalBucketS3APIClient()
+		hostBootstrap, err := loadHostBootstrap()
+		if err != nil {
+			return fmt.Errorf("loading host bootstrap: %w", err)
+		}
 
-		return bootstrap.RemoveGarageBootstrapHost(env.Context, client, *name)
+		client := hostBootstrap.GlobalBucketS3APIClient()
+
+		return bootstrap.RemoveGarageBootstrapHost(subCmdCtx.ctx, client, *name)
 	},
 }
 

entrypoint/src/cmd/entrypoint/main.go

@@ -1,10 +1,14 @@
 package main
 
 import (
+	"context"
 	"fmt"
 	"os"
+	"os/signal"
+	"path/filepath"
+	"syscall"
 
-	crypticnet "cryptic-net"
+	"github.com/adrg/xdg"
 )
 
 // The purpose of this binary is to act as the entrypoint of the cryptic-net
@@ -12,17 +16,42 @@ import (
 // then passes execution along to an appropriate binary housed in AppDir/bin
 // (usually a bash script, which is more versatile than a go program).
 
+func getAppDirPath() string {
+	appDirPath := os.Getenv("APPDIR")
+	if appDirPath == "" {
+		appDirPath = "."
+	}
+	return appDirPath
+}
+
+var (
+	envAppDirPath     = getAppDirPath()
+	envRuntimeDirPath = filepath.Join(xdg.RuntimeDir, "cryptic-net")
+	envDataDirPath    = filepath.Join(xdg.DataHome, "cryptic-net")
+)
+
 func main() {
 
-	env, err := crypticnet.NewEnv(true)
+	ctx, cancel := context.WithCancel(context.Background())
 
-	if err != nil {
-		panic(fmt.Sprintf("loading environment: %v", err))
-	}
+	signalCh := make(chan os.Signal, 2)
+	signal.Notify(signalCh, syscall.SIGINT, syscall.SIGTERM)
 
-	err = subCmdCtx{
+	go func() {
+		sig := <-signalCh
+		cancel()
+		fmt.Fprintf(os.Stderr, "got signal %v, will exit gracefully\n", sig)
+
+		sig = <-signalCh
+		fmt.Fprintf(os.Stderr, "second interrupt signal %v received, force quitting, there may be zombie children left behind, good luck!\n", sig)
+
+		os.Stderr.Sync()
+		os.Exit(1)
+	}()
+
+	err := subCmdCtx{
 		args: os.Args[1:],
-		env:  env,
+		ctx:  ctx,
 	}.doSubCmd(
 		subCmdAdmin,
 		subCmdDaemon,

entrypoint/src/cmd/entrypoint/nebula_util.go

@@ -2,12 +2,12 @@ package main
 
 import (
 	"context"
-	crypticnet "cryptic-net"
+	"cryptic-net/bootstrap"
+	"cryptic-net/daemon"
 	"cryptic-net/yamlutil"
 	"fmt"
 	"net"
 	"path/filepath"
-	"strconv"
 
 	"code.betamike.com/cryptic-io/pmux/pmuxlib"
 )
@@ -16,9 +16,9 @@ import (
 // this by attempting to create a UDP connection which has the nebula IP set as
 // its source. If this succeeds we can assume that at the very least the nebula
 // interface has been initialized.
-func waitForNebula(ctx context.Context, env crypticnet.Env) error {
+func waitForNebula(ctx context.Context, hostBootstrap bootstrap.Bootstrap) error {
 
-	ipStr := env.Bootstrap.ThisHost().Nebula.IP
+	ipStr := hostBootstrap.ThisHost().Nebula.IP
 	ip := net.ParseIP(ipStr)
 
 	lUdpAddr := &net.UDPAddr{IP: ip, Port: 0}
@@ -34,14 +34,19 @@ func waitForNebula(ctx context.Context, env crypticnet.Env) error {
 	})
 }
 
-func nebulaPmuxProcConfig(env crypticnet.Env) (pmuxlib.ProcessConfig, error) {
+func nebulaPmuxProcConfig(
+	hostBootstrap bootstrap.Bootstrap,
+	daemonConfig daemon.Config,
+) (
+	pmuxlib.ProcessConfig, error,
+) {
 
 	var (
 		lighthouseHostIPs []string
 		staticHostMap     = map[string][]string{}
 	)
 
-	for _, host := range env.Bootstrap.Hosts {
+	for _, host := range hostBootstrap.Hosts {
 
 		if host.Nebula.PublicAddr == "" {
 			continue
@@ -53,9 +58,9 @@ func nebulaPmuxProcConfig(env crypticnet.Env) (pmuxlib.ProcessConfig, error) {
 
 	config := map[string]interface{}{
 		"pki": map[string]string{
-			"ca":   env.Bootstrap.NebulaHostCert.CACert,
-			"cert": env.Bootstrap.NebulaHostCert.HostCert,
-			"key":  env.Bootstrap.NebulaHostCert.HostKey,
+			"ca":   hostBootstrap.NebulaHostCert.CACert,
+			"cert": hostBootstrap.NebulaHostCert.HostCert,
+			"key":  hostBootstrap.NebulaHostCert.HostKey,
 		},
 		"static_host_map": staticHostMap,
 		"punchy": map[string]bool{
@@ -63,11 +68,12 @@ func nebulaPmuxProcConfig(env crypticnet.Env) (pmuxlib.ProcessConfig, error) {
 			"respond": true,
 		},
 		"tun": map[string]interface{}{
-			"dev": "cryptic-nebula1",
+			"dev": "cryptic-net-nebula",
 		},
+		"firewall": daemonConfig.VPN.Firewall,
 	}
 
-	if publicAddr := env.ThisDaemon().VPN.PublicAddr; publicAddr == "" {
+	if publicAddr := daemonConfig.VPN.PublicAddr; publicAddr == "" {
 
 		config["listen"] = map[string]string{
 			"host": "0.0.0.0",
@@ -97,33 +103,7 @@ func nebulaPmuxProcConfig(env crypticnet.Env) (pmuxlib.ProcessConfig, error) {
 		}
 	}
 
-	thisDaemon := env.ThisDaemon()
-
-	var firewallInbound []crypticnet.ConfigFirewallRule
-
-	for _, alloc := range thisDaemon.Storage.Allocations {
-		firewallInbound = append(
-			firewallInbound,
-			crypticnet.ConfigFirewallRule{
-				Port:  strconv.Itoa(alloc.S3APIPort),
-				Proto: "tcp",
-				Host:  "any",
-			},
-			crypticnet.ConfigFirewallRule{
-				Port:  strconv.Itoa(alloc.RPCPort),
-				Proto: "tcp",
-				Host:  "any",
-			},
-		)
-	}
-
-	firewall := thisDaemon.VPN.Firewall
-
-	firewall.Inbound = append(firewallInbound, firewall.Inbound...)
-
-	config["firewall"] = firewall
-
-	nebulaYmlPath := filepath.Join(env.RuntimeDirPath, "nebula.yml")
+	nebulaYmlPath := filepath.Join(envRuntimeDirPath, "nebula.yml")
 
 	if err := yamlutil.WriteYamlFile(config, nebulaYmlPath); err != nil {
 		return pmuxlib.ProcessConfig{}, fmt.Errorf("writing nebula.yml to %q: %w", nebulaYmlPath, err)

entrypoint/src/cmd/entrypoint/proc_lock.go

@@ -1,4 +1,4 @@
-package crypticnet
+package main
 
 import (
 	"errors"
@@ -12,33 +12,13 @@ import (
 
 var errDaemonNotRunning = errors.New("no cryptic-net daemon process running")
 
-// ProcLock is used to lock a process.
-type ProcLock interface {
-
-	// WriteLock creates a new lock, or errors if the lock is alread held.
-	WriteLock() error
-
-	// AssertLock returns an error if the lock already exists.
-	AssertLock() error
+func lockFilePath() string {
+	return filepath.Join(envRuntimeDirPath, "lock")
 }
 
-type procLock struct {
-	dir string
-}
+func writeLock() error {
 
-// NewProcLock returns a ProcLock which will use a file in the given directory
-// to lock the process.
-func NewProcLock(dir string) ProcLock {
-	return &procLock{dir: dir}
-}
-
-func (pl *procLock) path() string {
-	return filepath.Join(pl.dir, "lock")
-}
-
-func (pl *procLock) WriteLock() error {
-
-	lockFilePath := pl.path()
+	lockFilePath := lockFilePath()
 
 	lockFile, err := os.OpenFile(
 		lockFilePath, os.O_WRONLY|os.O_CREATE|os.O_EXCL, 0400,
@@ -63,11 +43,31 @@ func (pl *procLock) WriteLock() error {
 	return nil
 }
 
+// returns a cleanup function which will clean up the created runtime directory.
+func setupAndLockRuntimeDir() (func(), error) {
+
+	fmt.Fprintf(os.Stderr, "will use runtime directory %q for temporary state\n", envRuntimeDirPath)
+
+	if err := os.MkdirAll(envRuntimeDirPath, 0700); err != nil {
+		return nil, fmt.Errorf("creating directory %q: %w", envRuntimeDirPath, err)
+
+	} else if err := writeLock(); err != nil {
+		return nil, err
+	}
+
+	return func() {
+		fmt.Fprintf(os.Stderr, "cleaning up runtime directory %q\n", envRuntimeDirPath)
+		if err := os.RemoveAll(envRuntimeDirPath); err != nil {
+			fmt.Fprintf(os.Stderr, "error removing temporary directory %q: %v", envRuntimeDirPath, err)
+		}
+	}, nil
+}
+
 // checks that the lock file exists and that the process which created it also
 // still exists.
-func (pl *procLock) AssertLock() error {
+func assertLock() error {
 
-	lockFilePath := pl.path()
+	lockFilePath := lockFilePath()
 
 	lockFile, err := os.Open(lockFilePath)
 

entrypoint/src/cmd/entrypoint/sub_cmd.go

@@ -1,7 +1,7 @@
 package main
 
 import (
-	crypticnet "cryptic-net"
+	"context"
 	"fmt"
 	"os"
 	"strings"
@@ -14,7 +14,8 @@ type subCmdCtx struct {
 	subCmd      subCmd   // the subCmd itself
 	args        []string // command-line arguments, excluding the subCmd itself.
 	subCmdNames []string // names of subCmds so far, including this one
-	env         crypticnet.Env
+
+	ctx context.Context
 }
 
 type subCmd struct {
@@ -99,9 +100,7 @@ func (ctx subCmdCtx) doSubCmd(subCmds ...subCmd) error {
 
 	if subCmd.checkLock {
 
-		err := crypticnet.NewProcLock(ctx.env.RuntimeDirPath).AssertLock()
-
-		if err != nil {
+		if err := assertLock(); err != nil {
 			return fmt.Errorf("checking lock file: %w", err)
 		}
 	}
@@ -110,7 +109,7 @@ func (ctx subCmdCtx) doSubCmd(subCmds ...subCmd) error {
 		subCmd:      subCmd,
 		args:        args,
 		subCmdNames: append(ctx.subCmdNames, subCmdName),
-		env:         ctx.env,
+		ctx:         ctx.ctx,
 	})
 
 	if err != nil {

entrypoint/src/cmd/entrypoint/version.go

@@ -11,7 +11,7 @@ var subCmdVersion = subCmd{
 	descr: "Dumps version and build info to stdout",
 	do: func(subCmdCtx subCmdCtx) error {
 
-		versionPath := filepath.Join(subCmdCtx.env.AppDirPath, "share/version")
+		versionPath := filepath.Join(envAppDirPath, "share/version")
 
 		version, err := os.ReadFile(versionPath)
 

entrypoint/src/daemon/config.go

@@ -1,4 +1,6 @@
-package crypticnet
+package daemon
+
+import "strconv"
 
 type ConfigFirewall struct {
 	Conntrack ConfigConntrack      `yaml:"conntrack"`
@@ -25,9 +27,9 @@ type ConfigFirewallRule struct {
 	CAName string   `yaml:"ca_name,omitempty"`
 }
 
-// DaemonYmlStorageAllocation describes the structure of each storage allocation
-// within the daemon.yml file.
-type DaemonYmlStorageAllocation struct {
+// ConfigStorageAllocation describes the structure of each storage allocation
+// within the daemon config file.
+type ConfigStorageAllocation struct {
 	DataPath  string `yaml:"data_path"`
 	MetaPath  string `yaml:"meta_path"`
 	Capacity  int    `yaml:"capacity"`
@@ -36,8 +38,8 @@ type DaemonYmlStorageAllocation struct {
 	AdminPort int    `yaml:"admin_port"`
 }
 
-// DaemonYml describes the structure of the daemon.yml file.
-type DaemonYml struct {
+// Config describes the structure of the daemon config file.
+type Config struct {
 	DNS struct {
 		Resolvers []string `yaml:"resolvers"`
 	} `yaml:"dns"`
@@ -46,6 +48,47 @@ type DaemonYml struct {
 		Firewall   ConfigFirewall `yaml:"firewall"`
 	} `yaml:"vpn"`
 	Storage struct {
-		Allocations []DaemonYmlStorageAllocation
+		Allocations []ConfigStorageAllocation
 	} `yaml:"storage"`
 }
+
+func (c *Config) fillDefaults() {
+
+	var firewallGarageInbound []ConfigFirewallRule
+
+	for i := range c.Storage.Allocations {
+
+		if c.Storage.Allocations[i].RPCPort == 0 {
+			c.Storage.Allocations[i].RPCPort = 3900 + (i * 10)
+		}
+
+		if c.Storage.Allocations[i].S3APIPort == 0 {
+			c.Storage.Allocations[i].S3APIPort = 3901 + (i * 10)
+		}
+
+		if c.Storage.Allocations[i].AdminPort == 0 {
+			c.Storage.Allocations[i].AdminPort = 3902 + (i * 10)
+		}
+
+		alloc := c.Storage.Allocations[i]
+
+		firewallGarageInbound = append(
+			firewallGarageInbound,
+			ConfigFirewallRule{
+				Port:  strconv.Itoa(alloc.S3APIPort),
+				Proto: "tcp",
+				Host:  "any",
+			},
+			ConfigFirewallRule{
+				Port:  strconv.Itoa(alloc.RPCPort),
+				Proto: "tcp",
+				Host:  "any",
+			},
+		)
+	}
+
+	c.VPN.Firewall.Inbound = append(
+		c.VPN.Firewall.Inbound,
+		firewallGarageInbound...,
+	)
+}

entrypoint/src/daemon/daemon.go

@@ -0,0 +1,85 @@
+// Package daemon contains types and functions related specifically to the
+// cryptic-net daemon.
+package daemon
+
+import (
+	"cryptic-net/yamlutil"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+
+	"github.com/imdario/mergo"
+	"gopkg.in/yaml.v3"
+)
+
+func defaultConfigPath(appDirPath string) string {
+	return filepath.Join(appDirPath, "etc", "daemon.yml")
+}
+
+// CopyDefaultConfig copies the daemon config file embedded in the AppDir into
+// the given io.Writer.
+func CopyDefaultConfig(into io.Writer, appDirPath string) error {
+
+	defaultConfigPath := defaultConfigPath(appDirPath)
+
+	f, err := os.Open(defaultConfigPath)
+	if err != nil {
+		return fmt.Errorf("opening daemon config at %q: %w", defaultConfigPath, err)
+	}
+
+	defer f.Close()
+
+	if _, err := io.Copy(into, f); err != nil {
+		return fmt.Errorf("copying daemon config from %q: %w", defaultConfigPath, err)
+	}
+
+	return nil
+}
+
+// LoadConfig loads the daemon config from userConfigPath, merges it with
+// the default found in the appDirPath, and returns the result.
+//
+// If userConfigPath is not given then the default is loaded and returned.
+func LoadConfig(
+	appDirPath, userConfigPath string,
+) (
+	Config, error,
+) {
+
+	defaultConfigPath := defaultConfigPath(appDirPath)
+
+	var fullDaemon map[string]interface{}
+
+	if err := yamlutil.LoadYamlFile(&fullDaemon, defaultConfigPath); err != nil {
+		return Config{}, fmt.Errorf("parsing default daemon config file: %w", err)
+	}
+
+	if userConfigPath != "" {
+
+		var daemonConfig map[string]interface{}
+		if err := yamlutil.LoadYamlFile(&daemonConfig, userConfigPath); err != nil {
+			return Config{}, fmt.Errorf("parsing %q: %w", userConfigPath, err)
+		}
+
+		err := mergo.Merge(&fullDaemon, daemonConfig, mergo.WithOverride)
+		if err != nil {
+			return Config{}, fmt.Errorf("merging contents of file %q: %w", userConfigPath, err)
+		}
+	}
+
+	fullDaemonB, err := yaml.Marshal(fullDaemon)
+
+	if err != nil {
+		return Config{}, fmt.Errorf("yaml marshaling: %w", err)
+	}
+
+	var config Config
+	if err := yaml.Unmarshal(fullDaemonB, &config); err != nil {
+		return Config{}, fmt.Errorf("yaml unmarshaling back into Config struct: %w", err)
+	}
+
+	config.fillDefaults()
+
+	return config, nil
+}

entrypoint/src/dnsmasq/dnsmasq.go

@@ -0,0 +1,3 @@
+// Package dnsmasq contains helper functions and types which are useful for
+// setting up dnsmasq configs, processes, and deployments.
+package dnsmasq

entrypoint/src/dnsmasq/tpl.go

@@ -0,0 +1,58 @@
+package dnsmasq
+
+import (
+	"cryptic-net/bootstrap"
+	"fmt"
+	"os"
+	"text/template"
+)
+
+// ConfData describes all the data needed to populate a dnsmasq.conf file.
+type ConfData struct {
+	Resolvers []string
+	Domain    string
+	IP        string
+	Hosts     []bootstrap.Host
+}
+
+var confTpl = template.Must(template.New("").Parse(`
+port=53
+
+bind-interfaces
+listen-address={{ .IP }}
+
+no-resolv
+no-hosts
+
+user=
+group=
+
+{{- range $host := .Hosts }}
+address=/{{ $host.Name }}.hosts.{{ .Domain }}/{{ $host.Nebula.IP }}
+{{ end -}}
+
+{{- range .Resolvers }}
+server={{ . }}
+{{ end -}}
+`))
+
+// WriteConfFile renders a dnsmasq.conf using the given data to a new
+// file at the given path.
+func WriteConfFile(path string, data ConfData) error {
+
+	file, err := os.OpenFile(
+		path, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0640,
+	)
+
+	if err != nil {
+		return fmt.Errorf("creating file: %w", err)
+	}
+
+	defer file.Close()
+
+	if err := confTpl.Execute(file, data); err != nil {
+		return fmt.Errorf("rendering template to file: %w", err)
+	}
+
+	return nil
+}

entrypoint/src/doc.go

@@ -1,3 +0,0 @@
-// Package globals defines global constants and variables which are valid
-// across all cryptic-net processes and sub-processes.
-package crypticnet

entrypoint/src/env.go

@@ -1,241 +0,0 @@
-package crypticnet
-
-import (
-	"context"
-	"cryptic-net/bootstrap"
-	"cryptic-net/garage"
-	"cryptic-net/yamlutil"
-	"errors"
-	"fmt"
-	"io/fs"
-	"net"
-	"os"
-	"os/signal"
-	"path/filepath"
-	"strconv"
-	"sync"
-	"syscall"
-
-	"github.com/adrg/xdg"
-)
-
-// Names of various environment variables which get set by the entrypoint.
-const (
-	DaemonYmlPathEnvVar  = "_DAEMON_YML_PATH"
-	BootstrapPathEnvVar  = "_BOOTSTRAP_PATH"
-	RuntimeDirPathEnvVar = "_RUNTIME_DIR_PATH"
-	DataDirPathEnvVar    = "_DATA_DIR_PATH"
-)
-
-// Env contains the values of environment variables, as well as other entities
-// which are useful across all processes.
-type Env struct {
-	Context context.Context
-
-	AppDirPath     string
-	DaemonYmlPath  string
-	RuntimeDirPath string
-	DataDirPath    string
-
-	// If NewEnv is called with bootstrapOptional, and a bootstrap file is not
-	// found, then these fields will not be set.
-	BootstrapPath string
-	Bootstrap     bootstrap.Bootstrap
-
-	thisDaemon     DaemonYml
-	thisDaemonOnce sync.Once
-}
-
-func getAppDirPath() string {
-	appDirPath := os.Getenv("APPDIR")
-	if appDirPath == "" {
-		appDirPath = "."
-	}
-	return appDirPath
-}
-
-// NewEnv calculates an Env instance based on the APPDIR and XDG envvars.
-//
-// If bootstrapOptional is true then NewEnv will first check if a bootstrap file
-// can be found in the expected places, and if not then it will not populate
-// BootstrapFS or any other fields based on it.
-func NewEnv(bootstrapOptional bool) (Env, error) {
-
-	runtimeDirPath := filepath.Join(xdg.RuntimeDir, "cryptic-net")
-	appDirPath := getAppDirPath()
-
-	env := Env{
-		AppDirPath:     appDirPath,
-		DaemonYmlPath:  filepath.Join(runtimeDirPath, "daemon.yml"),
-		RuntimeDirPath: runtimeDirPath,
-		DataDirPath:    filepath.Join(xdg.DataHome, "cryptic-net"),
-	}
-
-	return env.init(bootstrapOptional)
-}
-
-// ReadEnv reads an Env from the process's environment variables, rather than
-// calculating like NewEnv does.
-func ReadEnv() (Env, error) {
-
-	var err error
-
-	readEnv := func(key string) string {
-		if err != nil {
-			return ""
-		}
-
-		val := os.Getenv(key)
-
-		if val == "" {
-			err = fmt.Errorf("envvar %q not set", key)
-		}
-
-		return val
-	}
-
-	env := Env{
-		AppDirPath:     getAppDirPath(),
-		DaemonYmlPath:  readEnv(DaemonYmlPathEnvVar),
-		RuntimeDirPath: readEnv(RuntimeDirPathEnvVar),
-		DataDirPath:    readEnv(DataDirPathEnvVar),
-	}
-
-	if err != nil {
-		return Env{}, err
-	}
-
-	return env.init(false)
-}
-
-// DataDirBootstrapPath returns the path to the bootstrap file within the user's
-// data dir. If the file does not exist there it will be found in the AppDirPath
-// by ReloadBootstrap.
-func (e Env) DataDirBootstrapPath() string {
-	return filepath.Join(e.DataDirPath, "bootstrap.tgz")
-}
-
-// LoadBootstrap loads a Bootstrap from the given path, and returns a copy of
-// the Env with that Bootstrap set along with the BootstrapPath (or an error).
-func (e Env) LoadBootstrap(path string) (Env, error) {
-
-	var err error
-
-	if e.Bootstrap, err = bootstrap.FromFile(path); err != nil {
-		return Env{}, fmt.Errorf("parsing bootstrap.tgz at %q: %w", path, err)
-	}
-
-	e.BootstrapPath = path
-
-	return e, nil
-}
-
-func (e Env) initBootstrap(bootstrapOptional bool) (Env, error) {
-
-	exists := func(path string) (bool, error) {
-		if _, err := os.Stat(path); errors.Is(err, fs.ErrNotExist) {
-			return false, nil
-		} else if err != nil {
-			return false, fmt.Errorf("stat'ing %q: %w", path, err)
-		}
-		return true, nil
-	}
-
-	// start by checking if a bootstrap can be found in the user's data
-	// directory. This will only not be the case if daemon has never been
-	// successfully started.
-	{
-		bootstrapPath := e.DataDirBootstrapPath()
-
-		if exists, err := exists(bootstrapPath); err != nil {
-			return Env{}, fmt.Errorf("determining if %q exists: %w", bootstrapPath, err)
-
-		} else if exists {
-			return e.LoadBootstrap(bootstrapPath)
-		}
-	}
-
-	// fallback to checking within the AppDir for a bootstrap which has been
-	// embedded into the binary.
-	{
-		bootstrapPath := filepath.Join(e.AppDirPath, "share/bootstrap.tgz")
-
-		if exists, err := exists(bootstrapPath); err != nil {
-			return Env{}, fmt.Errorf("determining if %q exists: %w", bootstrapPath, err)
-
-		} else if !exists && !bootstrapOptional {
-			return Env{}, fmt.Errorf("boostrap file not found at %q", bootstrapPath)
-
-		} else if exists {
-			return e.LoadBootstrap(bootstrapPath)
-		}
-	}
-
-	return e, nil
-}
-
-func (e Env) init(bootstrapOptional bool) (Env, error) {
-
-	var cancel context.CancelFunc
-	e.Context, cancel = context.WithCancel(context.Background())
-
-	signalCh := make(chan os.Signal, 2)
-	signal.Notify(signalCh, syscall.SIGINT, syscall.SIGTERM)
-
-	go func() {
-		sig := <-signalCh
-		cancel()
-		fmt.Fprintf(os.Stderr, "got signal %v, will exit gracefully\n", sig)
-
-		sig = <-signalCh
-		fmt.Fprintf(os.Stderr, "second interrupt signal %v received, force quitting, there may be zombie children left behind, good luck!\n", sig)
-
-		os.Stderr.Sync()
-		os.Exit(1)
-	}()
-
-	return e.initBootstrap(bootstrapOptional)
-}
-
-// ToMap returns the Env as a map of key/value strings. If this map is set into
-// a process's environment, then that process can read it back using ReadEnv.
-func (e Env) ToMap() map[string]string {
-	return map[string]string{
-		DaemonYmlPathEnvVar:  e.DaemonYmlPath,
-		BootstrapPathEnvVar:  e.BootstrapPath,
-		RuntimeDirPathEnvVar: e.RuntimeDirPath,
-		DataDirPathEnvVar:    e.DataDirPath,
-	}
-}
-
-// ThisDaemon returns the DaemonYml (loaded from DaemonYmlPath) for the
-// currently running process.
-func (e Env) ThisDaemon() DaemonYml {
-	e.thisDaemonOnce.Do(func() {
-		if err := yamlutil.LoadYamlFile(&e.thisDaemon, e.DaemonYmlPath); err != nil {
-			panic(err)
-		}
-	})
-	return e.thisDaemon
-}
-
-// BinPath returns the absolute path to a binary in the AppDir.
-func (e Env) BinPath(name string) string {
-	return filepath.Join(e.AppDirPath, "bin", name)
-}
-
-// GarageAdminClient will return an AdminClient for a local garage instance, or
-// it will _panic_ if there is no local instance configured.
-func (e Env) GarageAdminClient() *garage.AdminClient {
-
-	thisHost := e.Bootstrap.ThisHost()
-	thisDaemon := e.ThisDaemon()
-
-	return garage.NewAdminClient(
-		net.JoinHostPort(
-			thisHost.Nebula.IP,
-			strconv.Itoa(thisDaemon.Storage.Allocations[0].AdminPort),
-		),
-		e.Bootstrap.GarageAdminToken,
-	)
-}

entrypoint/src/garage/admin_client.go

@@ -9,6 +9,17 @@ import (
 	"net/http"
 )
 
+// AdminClientError gets returned from AdminClient's Do method for non-200
+// errors.
+type AdminClientError struct {
+	StatusCode int
+	Body       []byte
+}
+
+func (e AdminClientError) Error() string {
+	return fmt.Sprintf("%d response from admin: %q", e.StatusCode, e.Body)
+}
+
 // AdminClient is a helper type for performing actions against the garage admin
 // interface.
 type AdminClient struct {
@@ -64,7 +75,11 @@ func (c *AdminClient) Do(
 	defer res.Body.Close()
 
 	if res.StatusCode != 200 {
-		return fmt.Errorf("unexpected %s response returned", res.Status)
+		body, _ := io.ReadAll(res.Body)
+		return AdminClientError{
+			StatusCode: res.StatusCode,
+			Body:       body,
+		}
 	}
 
 	if rcv == nil {

entrypoint/src/garage/tpl.go

@@ -67,9 +67,7 @@ func WriteGarageTomlFile(path string, data GarageTomlData) error {
 
 	defer file.Close()
 
-	err = RenderGarageToml(file, data)
-
-	if err != nil {
+	if err := garageTomlTpl.Execute(file, data); err != nil {
 		return fmt.Errorf("rendering template to file: %w", err)
 	}
 

entrypoint/src/go.mod

@@ -3,7 +3,7 @@ module cryptic-net
 go 1.17
 
 require (
-	code.betamike.com/cryptic-io/pmux v0.0.0-20221020185531-7a7868003822
+	code.betamike.com/cryptic-io/pmux v0.0.0-20221025185405-29241f144a2d
 	github.com/adrg/xdg v0.4.0
 	github.com/imdario/mergo v0.3.12
 	github.com/minio/minio-go/v7 v7.0.28

entrypoint/src/go.sum

@@ -1,5 +1,7 @@
 code.betamike.com/cryptic-io/pmux v0.0.0-20221020185531-7a7868003822 h1:c7Eu2h8gXOpOfhC1LvSYLNfiSsWTyvdI1XVpUuqMFHE=
 code.betamike.com/cryptic-io/pmux v0.0.0-20221020185531-7a7868003822/go.mod h1:cBuEN/rkaM/GH24uQroX/++qDmte+mLudDUqMt6XJWs=
+code.betamike.com/cryptic-io/pmux v0.0.0-20221025185405-29241f144a2d h1:s6nDTg23o9ujZZnl8ohZBDoG4SqPUyFfvod9DQjwmNU=
+code.betamike.com/cryptic-io/pmux v0.0.0-20221025185405-29241f144a2d/go.mod h1:cBuEN/rkaM/GH24uQroX/++qDmte+mLudDUqMt6XJWs=
 github.com/adrg/xdg v0.4.0 h1:RzRqFcjH4nE5C6oTAxhBtoE2IRyjBSa62SCbyPidvls=
 github.com/adrg/xdg v0.4.0/go.mod h1:N6ag73EX4wyxeaoeHctc1mas01KZgsj5tYiAIwqJE/E=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=

nix/dnsmasq.nix

@@ -0,0 +1,25 @@
+{
+
+  stdenv,
+  glibcStatic,
+
+}: stdenv.mkDerivation rec {
+
+  pname = "dnsmasq";
+  version = "2.85";
+
+  src = builtins.fetchurl {
+    url = "https://www.thekelleys.org.uk/dnsmasq/${pname}-${version}.tar.xz";
+    sha256 = "sha256-rZjTgD32h+W5OAgPPSXGKP5ByHh1LQP7xhmXh/7jEvo=";
+  };
+
+  nativeBuildInputs = [ glibcStatic ];
+
+  makeFlags = [
+    "LDFLAGS=-static"
+    "DESTDIR="
+    "BINDIR=$(out)/bin"
+    "MANDIR=$(out)/man"
+    "LOCALEDIR=$(out)/share/locale"
+  ];
+}

nix/garage.nix

@@ -24,7 +24,7 @@ in rec {
   env = buildEnv {
     name = "cryptic-net-garage";
     paths = [
-      garage
+      garage.pkgs.amd64.release
       minioClient
     ];
   };

nix/pkgs.nix

@@ -2,7 +2,8 @@ rec {
 
   overlays = [
 
-    # Make both buildGoModules use static compilation by default.
+    # Make buildGoModules use static compilation by default, and use go 1.18
+    # everywhere.
     (final: prev:
 
       let
@@ -17,19 +18,11 @@ rec {
       in {
 
         go = prev.go_1_18;
-        buildGoModule = args: prev.buildGoModule (buildArgs // args);
+        buildGoModule = args: prev.buildGo118Module (buildArgs // args);
         buildGo118Module = args: prev.buildGo118Module (buildArgs // args);
 
       }
     )
-
-    (final: prev: { rebase = prev.callPackage ./rebase.nix {}; })
-    (final: prev: { yq-go = prev.callPackage ./yq-go.nix {}; })
-
-    (final: prev: { nebula = prev.callPackage ./nebula.nix {
-      buildGoModule = prev.buildGo118Module;
-    }; })
-
   ];
 
   version = "22-05";

nix/rebase.nix

@@ -1,18 +0,0 @@
-# rebase is a helper which takes all files/dirs under oldroot, and
-# creates a new derivation with those files/dirs copied under newroot
-# (where newroot is a relative path to the root of the derivation).
-
-{
-
-  stdenv,
-
-}: name: oldroot: newroot: stdenv.mkDerivation {
-
-  inherit name oldroot newroot;
-
-  builder = builtins.toFile "builder.sh" ''
-    source $stdenv/setup
-    mkdir -p "$out"/"$newroot"
-    cp -rL "$oldroot"/* "$out"/"$newroot"
-  '';
-}

nix/yq-go.nix

@@ -1,19 +0,0 @@
-{
-
-  buildGoModule,
-  fetchFromGitHub,
-
-}: buildGoModule rec {
-
-  pname = "yq-go";
-  version = "4.21.1";
-
-  src = fetchFromGitHub {
-    owner = "mikefarah";
-    repo = "yq";
-    rev = "v${version}";
-    sha256 = "sha256-283xe7FVHYSsRl4cZD7WDzIW1gqNAFsNrWYJkthZheU=";
-  };
-
-  vendorSha256 = "sha256-F11FnDYJ59aKrdRXDPpKlhX52yQXdaN1sblSkVI2j9w=";
-}