Top-level setup package (#1605)

* Move config, setup, mscs into "setup" top-level folder

* oops, forgot the EDU server

* Add setup

* goimports

16 files changed, 1888 insertions, 0 deletions

diff --git a/setup/config/config.go b/setup/config/config.go
new file mode 100644
index 00000000..b8b12d0c
--- /dev/null
+++ b/setup/config/config.go
@@ -0,0 +1,572 @@
+// Copyright 2017 Vector Creations Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package config
+
+import (
+	"bytes"
+	"encoding/pem"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/url"
+	"path/filepath"
+	"regexp"
+	"strings"
+
+	"github.com/matrix-org/dendrite/clientapi/auth/authtypes"
+	"github.com/matrix-org/gomatrixserverlib"
+	"github.com/sirupsen/logrus"
+	"golang.org/x/crypto/ed25519"
+	yaml "gopkg.in/yaml.v2"
+
+	jaegerconfig "github.com/uber/jaeger-client-go/config"
+	jaegermetrics "github.com/uber/jaeger-lib/metrics"
+)
+
+// keyIDRegexp defines allowable characters in Key IDs.
+var keyIDRegexp = regexp.MustCompile("^ed25519:[a-zA-Z0-9_]+$")
+
+// Version is the current version of the config format.
+// This will change whenever we make breaking changes to the config format.
+const Version = 1
+
+// Dendrite contains all the config used by a dendrite process.
+// Relative paths are resolved relative to the current working directory
+type Dendrite struct {
+	// The version of the configuration file.
+	// If the version in a file doesn't match the current dendrite config
+	// version then we can give a clear error message telling the user
+	// to update their config file to the current version.
+	// The version of the file should only be different if there has
+	// been a breaking change to the config file format.
+	Version int `yaml:"version"`
+
+	Global           Global           `yaml:"global"`
+	AppServiceAPI    AppServiceAPI    `yaml:"app_service_api"`
+	ClientAPI        ClientAPI        `yaml:"client_api"`
+	EDUServer        EDUServer        `yaml:"edu_server"`
+	FederationAPI    FederationAPI    `yaml:"federation_api"`
+	FederationSender FederationSender `yaml:"federation_sender"`
+	KeyServer        KeyServer        `yaml:"key_server"`
+	MediaAPI         MediaAPI         `yaml:"media_api"`
+	RoomServer       RoomServer       `yaml:"room_server"`
+	SigningKeyServer SigningKeyServer `yaml:"signing_key_server"`
+	SyncAPI          SyncAPI          `yaml:"sync_api"`
+	UserAPI          UserAPI          `yaml:"user_api"`
+
+	MSCs MSCs `yaml:"mscs"`
+
+	// The config for tracing the dendrite servers.
+	Tracing struct {
+		// Set to true to enable tracer hooks. If false, no tracing is set up.
+		Enabled bool `yaml:"enabled"`
+		// The config for the jaeger opentracing reporter.
+		Jaeger jaegerconfig.Configuration `yaml:"jaeger"`
+	} `yaml:"tracing"`
+
+	// The config for logging informations. Each hook will be added to logrus.
+	Logging []LogrusHook `yaml:"logging"`
+
+	// Any information derived from the configuration options for later use.
+	Derived Derived `yaml:"-"`
+}
+
+// TODO: Kill Derived
+type Derived struct {
+	Registration struct {
+		// Flows is a slice of flows, which represent one possible way that the client can authenticate a request.
+		// http://matrix.org/docs/spec/HEAD/client_server/r0.3.0.html#user-interactive-authentication-api
+		// As long as the generated flows only rely on config file options,
+		// we can generate them on startup and store them until needed
+		Flows []authtypes.Flow `json:"flows"`
+
+		// Params that need to be returned to the client during
+		// registration in order to complete registration stages.
+		Params map[string]interface{} `json:"params"`
+	}
+
+	// Application services parsed from their config files
+	// The paths of which were given above in the main config file
+	ApplicationServices []ApplicationService
+
+	// Meta-regexes compiled from all exclusive application service
+	// Regexes.
+	//
+	// When a user registers, we check that their username does not match any
+	// exclusive application service namespaces
+	ExclusiveApplicationServicesUsernameRegexp *regexp.Regexp
+	// When a user creates a room alias, we check that it isn't already
+	// reserved by an application service
+	ExclusiveApplicationServicesAliasRegexp *regexp.Regexp
+	// Note: An Exclusive Regex for room ID isn't necessary as we aren't blocking
+	// servers from creating RoomIDs in exclusive application service namespaces
+}
+
+type InternalAPIOptions struct {
+	Listen  HTTPAddress `yaml:"listen"`
+	Connect HTTPAddress `yaml:"connect"`
+}
+
+type ExternalAPIOptions struct {
+	Listen HTTPAddress `yaml:"listen"`
+}
+
+// A Path on the filesystem.
+type Path string
+
+// A DataSource for opening a postgresql database using lib/pq.
+type DataSource string
+
+func (d DataSource) IsSQLite() bool {
+	return strings.HasPrefix(string(d), "file:")
+}
+
+func (d DataSource) IsPostgres() bool {
+	// commented line may not always be true?
+	// return strings.HasPrefix(string(d), "postgres:")
+	return !d.IsSQLite()
+}
+
+// A Topic in kafka.
+type Topic string
+
+// An Address to listen on.
+type Address string
+
+// An HTTPAddress to listen on, starting with either http:// or https://.
+type HTTPAddress string
+
+func (h HTTPAddress) Address() (Address, error) {
+	url, err := url.Parse(string(h))
+	if err != nil {
+		return "", err
+	}
+	return Address(url.Host), nil
+}
+
+// FileSizeBytes is a file size in bytes
+type FileSizeBytes int64
+
+// ThumbnailSize contains a single thumbnail size configuration
+type ThumbnailSize struct {
+	// Maximum width of the thumbnail image
+	Width int `yaml:"width"`
+	// Maximum height of the thumbnail image
+	Height int `yaml:"height"`
+	// ResizeMethod is one of crop or scale.
+	// crop scales to fill the requested dimensions and crops the excess.
+	// scale scales to fit the requested dimensions and one dimension may be smaller than requested.
+	ResizeMethod string `yaml:"method,omitempty"`
+}
+
+// LogrusHook represents a single logrus hook. At this point, only parsing and
+// verification of the proper values for type and level are done.
+// Validity/integrity checks on the parameters are done when configuring logrus.
+type LogrusHook struct {
+	// The type of hook, currently only "file" is supported.
+	Type string `yaml:"type"`
+
+	// The level of the logs to produce. Will output only this level and above.
+	Level string `yaml:"level"`
+
+	// The parameters for this hook.
+	Params map[string]interface{} `yaml:"params"`
+}
+
+// ConfigErrors stores problems encountered when parsing a config file.
+// It implements the error interface.
+type ConfigErrors []string
+
+// Load a yaml config file for a server run as multiple processes or as a monolith.
+// Checks the config to ensure that it is valid.
+func Load(configPath string, monolith bool) (*Dendrite, error) {
+	configData, err := ioutil.ReadFile(configPath)
+	if err != nil {
+		return nil, err
+	}
+	basePath, err := filepath.Abs(".")
+	if err != nil {
+		return nil, err
+	}
+	// Pass the current working directory and ioutil.ReadFile so that they can
+	// be mocked in the tests
+	return loadConfig(basePath, configData, ioutil.ReadFile, monolith)
+}
+
+func loadConfig(
+	basePath string,
+	configData []byte,
+	readFile func(string) ([]byte, error),
+	monolithic bool,
+) (*Dendrite, error) {
+	var c Dendrite
+	c.Defaults()
+
+	var err error
+	if err = yaml.Unmarshal(configData, &c); err != nil {
+		return nil, err
+	}
+
+	if err = c.check(monolithic); err != nil {
+		return nil, err
+	}
+
+	privateKeyPath := absPath(basePath, c.Global.PrivateKeyPath)
+	privateKeyData, err := readFile(privateKeyPath)
+	if err != nil {
+		return nil, err
+	}
+
+	if c.Global.KeyID, c.Global.PrivateKey, err = readKeyPEM(privateKeyPath, privateKeyData, true); err != nil {
+		return nil, err
+	}
+
+	for i, oldPrivateKey := range c.Global.OldVerifyKeys {
+		var oldPrivateKeyData []byte
+
+		oldPrivateKeyPath := absPath(basePath, oldPrivateKey.PrivateKeyPath)
+		oldPrivateKeyData, err = readFile(oldPrivateKeyPath)
+		if err != nil {
+			return nil, err
+		}
+
+		// NOTSPEC: Ordinarily we should enforce key ID formatting, but since there are
+		// a number of private keys out there with non-compatible symbols in them due
+		// to lack of validation in Synapse, we won't enforce that for old verify keys.
+		keyID, privateKey, perr := readKeyPEM(oldPrivateKeyPath, oldPrivateKeyData, false)
+		if perr != nil {
+			return nil, perr
+		}
+
+		c.Global.OldVerifyKeys[i].KeyID, c.Global.OldVerifyKeys[i].PrivateKey = keyID, privateKey
+	}
+
+	c.MediaAPI.AbsBasePath = Path(absPath(basePath, c.MediaAPI.BasePath))
+
+	// Generate data from config options
+	err = c.Derive()
+	if err != nil {
+		return nil, err
+	}
+
+	c.Wiring()
+	return &c, nil
+}
+
+// Derive generates data that is derived from various values provided in
+// the config file.
+func (config *Dendrite) Derive() error {
+	// Determine registrations flows based off config values
+
+	config.Derived.Registration.Params = make(map[string]interface{})
+
+	// TODO: Add email auth type
+	// TODO: Add MSISDN auth type
+
+	if config.ClientAPI.RecaptchaEnabled {
+		config.Derived.Registration.Params[authtypes.LoginTypeRecaptcha] = map[string]string{"public_key": config.ClientAPI.RecaptchaPublicKey}
+		config.Derived.Registration.Flows = append(config.Derived.Registration.Flows,
+			authtypes.Flow{Stages: []authtypes.LoginType{authtypes.LoginTypeRecaptcha}})
+	} else {
+		config.Derived.Registration.Flows = append(config.Derived.Registration.Flows,
+			authtypes.Flow{Stages: []authtypes.LoginType{authtypes.LoginTypeDummy}})
+	}
+
+	// Load application service configuration files
+	if err := loadAppServices(&config.AppServiceAPI, &config.Derived); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// SetDefaults sets default config values if they are not explicitly set.
+func (c *Dendrite) Defaults() {
+	c.Version = 1
+
+	c.Global.Defaults()
+	c.ClientAPI.Defaults()
+	c.EDUServer.Defaults()
+	c.FederationAPI.Defaults()
+	c.FederationSender.Defaults()
+	c.KeyServer.Defaults()
+	c.MediaAPI.Defaults()
+	c.RoomServer.Defaults()
+	c.SigningKeyServer.Defaults()
+	c.SyncAPI.Defaults()
+	c.UserAPI.Defaults()
+	c.AppServiceAPI.Defaults()
+	c.MSCs.Defaults()
+
+	c.Wiring()
+}
+
+func (c *Dendrite) Verify(configErrs *ConfigErrors, isMonolith bool) {
+	type verifiable interface {
+		Verify(configErrs *ConfigErrors, isMonolith bool)
+	}
+	for _, c := range []verifiable{
+		&c.Global, &c.ClientAPI,
+		&c.EDUServer, &c.FederationAPI, &c.FederationSender,
+		&c.KeyServer, &c.MediaAPI, &c.RoomServer,
+		&c.SigningKeyServer, &c.SyncAPI, &c.UserAPI,
+		&c.AppServiceAPI, &c.MSCs,
+	} {
+		c.Verify(configErrs, isMonolith)
+	}
+}
+
+func (c *Dendrite) Wiring() {
+	c.ClientAPI.Matrix = &c.Global
+	c.EDUServer.Matrix = &c.Global
+	c.FederationAPI.Matrix = &c.Global
+	c.FederationSender.Matrix = &c.Global
+	c.KeyServer.Matrix = &c.Global
+	c.MediaAPI.Matrix = &c.Global
+	c.RoomServer.Matrix = &c.Global
+	c.SigningKeyServer.Matrix = &c.Global
+	c.SyncAPI.Matrix = &c.Global
+	c.UserAPI.Matrix = &c.Global
+	c.AppServiceAPI.Matrix = &c.Global
+	c.MSCs.Matrix = &c.Global
+
+	c.ClientAPI.Derived = &c.Derived
+	c.AppServiceAPI.Derived = &c.Derived
+}
+
+// Error returns a string detailing how many errors were contained within a
+// configErrors type.
+func (errs ConfigErrors) Error() string {
+	if len(errs) == 1 {
+		return errs[0]
+	}
+	return fmt.Sprintf(
+		"%s (and %d other problems)", errs[0], len(errs)-1,
+	)
+}
+
+// Add appends an error to the list of errors in this configErrors.
+// It is a wrapper to the builtin append and hides pointers from
+// the client code.
+// This method is safe to use with an uninitialized configErrors because
+// if it is nil, it will be properly allocated.
+func (errs *ConfigErrors) Add(str string) {
+	*errs = append(*errs, str)
+}
+
+// checkNotEmpty verifies the given value is not empty in the configuration.
+// If it is, adds an error to the list.
+func checkNotEmpty(configErrs *ConfigErrors, key, value string) {
+	if value == "" {
+		configErrs.Add(fmt.Sprintf("missing config key %q", key))
+	}
+}
+
+// checkNotZero verifies the given value is not zero in the configuration.
+// If it is, adds an error to the list.
+func checkNotZero(configErrs *ConfigErrors, key string, value int64) {
+	if value == 0 {
+		configErrs.Add(fmt.Sprintf("missing config key %q", key))
+	}
+}
+
+// checkPositive verifies the given value is positive (zero included)
+// in the configuration. If it is not, adds an error to the list.
+func checkPositive(configErrs *ConfigErrors, key string, value int64) {
+	if value < 0 {
+		configErrs.Add(fmt.Sprintf("invalid value for config key %q: %d", key, value))
+	}
+}
+
+// checkURL verifies that the parameter is a valid URL
+func checkURL(configErrs *ConfigErrors, key, value string) {
+	if value == "" {
+		configErrs.Add(fmt.Sprintf("missing config key %q", key))
+		return
+	}
+	url, err := url.Parse(value)
+	if err != nil {
+		configErrs.Add(fmt.Sprintf("config key %q contains invalid URL (%s)", key, err.Error()))
+		return
+	}
+	switch url.Scheme {
+	case "http":
+	case "https":
+	default:
+		configErrs.Add(fmt.Sprintf("config key %q URL should be http:// or https://", key))
+		return
+	}
+}
+
+// checkLogging verifies the parameters logging.* are valid.
+func (config *Dendrite) checkLogging(configErrs *ConfigErrors) {
+	for _, logrusHook := range config.Logging {
+		checkNotEmpty(configErrs, "logging.type", string(logrusHook.Type))
+		checkNotEmpty(configErrs, "logging.level", string(logrusHook.Level))
+	}
+}
+
+// check returns an error type containing all errors found within the config
+// file.
+func (config *Dendrite) check(_ bool) error { // monolithic
+	var configErrs ConfigErrors
+
+	if config.Version != Version {
+		configErrs.Add(fmt.Sprintf(
+			"unknown config version %q, expected %q", config.Version, Version,
+		))
+		return configErrs
+	}
+
+	config.checkLogging(&configErrs)
+
+	// Due to how Golang manages its interface types, this condition is not redundant.
+	// In order to get the proper behaviour, it is necessary to return an explicit nil
+	// and not a nil configErrors.
+	// This is because the following equalities hold:
+	// error(nil) == nil
+	// error(configErrors(nil)) != nil
+	if configErrs != nil {
+		return configErrs
+	}
+	return nil
+}
+
+// absPath returns the absolute path for a given relative or absolute path.
+func absPath(dir string, path Path) string {
+	if filepath.IsAbs(string(path)) {
+		// filepath.Join cleans the path so we should clean the absolute paths as well for consistency.
+		return filepath.Clean(string(path))
+	}
+	return filepath.Join(dir, string(path))
+}
+
+func readKeyPEM(path string, data []byte, enforceKeyIDFormat bool) (gomatrixserverlib.KeyID, ed25519.PrivateKey, error) {
+	for {
+		var keyBlock *pem.Block
+		keyBlock, data = pem.Decode(data)
+		if data == nil {
+			return "", nil, fmt.Errorf("no matrix private key PEM data in %q", path)
+		}
+		if keyBlock == nil {
+			return "", nil, fmt.Errorf("keyBlock is nil %q", path)
+		}
+		if keyBlock.Type == "MATRIX PRIVATE KEY" {
+			keyID := keyBlock.Headers["Key-ID"]
+			if keyID == "" {
+				return "", nil, fmt.Errorf("missing key ID in PEM data in %q", path)
+			}
+			if !strings.HasPrefix(keyID, "ed25519:") {
+				return "", nil, fmt.Errorf("key ID %q doesn't start with \"ed25519:\" in %q", keyID, path)
+			}
+			if enforceKeyIDFormat && !keyIDRegexp.MatchString(keyID) {
+				return "", nil, fmt.Errorf("key ID %q in %q contains illegal characters (use a-z, A-Z, 0-9 and _ only)", keyID, path)
+			}
+			_, privKey, err := ed25519.GenerateKey(bytes.NewReader(keyBlock.Bytes))
+			if err != nil {
+				return "", nil, err
+			}
+			return gomatrixserverlib.KeyID(keyID), privKey, nil
+		}
+	}
+}
+
+// AppServiceURL returns a HTTP URL for where the appservice component is listening.
+func (config *Dendrite) AppServiceURL() string {
+	// Hard code the appservice server to talk HTTP for now.
+	// If we support HTTPS we need to think of a practical way to do certificate validation.
+	// People setting up servers shouldn't need to get a certificate valid for the public
+	// internet for an internal API.
+	return string(config.AppServiceAPI.InternalAPI.Connect)
+}
+
+// RoomServerURL returns an HTTP URL for where the roomserver is listening.
+func (config *Dendrite) RoomServerURL() string {
+	// Hard code the roomserver to talk HTTP for now.
+	// If we support HTTPS we need to think of a practical way to do certificate validation.
+	// People setting up servers shouldn't need to get a certificate valid for the public
+	// internet for an internal API.
+	return string(config.RoomServer.InternalAPI.Connect)
+}
+
+// UserAPIURL returns an HTTP URL for where the userapi is listening.
+func (config *Dendrite) UserAPIURL() string {
+	// Hard code the userapi to talk HTTP for now.
+	// If we support HTTPS we need to think of a practical way to do certificate validation.
+	// People setting up servers shouldn't need to get a certificate valid for the public
+	// internet for an internal API.
+	return string(config.UserAPI.InternalAPI.Connect)
+}
+
+// EDUServerURL returns an HTTP URL for where the EDU server is listening.
+func (config *Dendrite) EDUServerURL() string {
+	// Hard code the EDU server to talk HTTP for now.
+	// If we support HTTPS we need to think of a practical way to do certificate validation.
+	// People setting up servers shouldn't need to get a certificate valid for the public
+	// internet for an internal API.
+	return string(config.EDUServer.InternalAPI.Connect)
+}
+
+// FederationSenderURL returns an HTTP URL for where the federation sender is listening.
+func (config *Dendrite) FederationSenderURL() string {
+	// Hard code the federation sender server to talk HTTP for now.
+	// If we support HTTPS we need to think of a practical way to do certificate validation.
+	// People setting up servers shouldn't need to get a certificate valid for the public
+	// internet for an internal API.
+	return string(config.FederationSender.InternalAPI.Connect)
+}
+
+// SigningKeyServerURL returns an HTTP URL for where the signing key server is listening.
+func (config *Dendrite) SigningKeyServerURL() string {
+	// Hard code the signing key server to talk HTTP for now.
+	// If we support HTTPS we need to think of a practical way to do certificate validation.
+	// People setting up servers shouldn't need to get a certificate valid for the public
+	// internet for an internal API.
+	return string(config.SigningKeyServer.InternalAPI.Connect)
+}
+
+// KeyServerURL returns an HTTP URL for where the key server is listening.
+func (config *Dendrite) KeyServerURL() string {
+	// Hard code the key server to talk HTTP for now.
+	// If we support HTTPS we need to think of a practical way to do certificate validation.
+	// People setting up servers shouldn't need to get a certificate valid for the public
+	// internet for an internal API.
+	return string(config.KeyServer.InternalAPI.Connect)
+}
+
+// SetupTracing configures the opentracing using the supplied configuration.
+func (config *Dendrite) SetupTracing(serviceName string) (closer io.Closer, err error) {
+	if !config.Tracing.Enabled {
+		return ioutil.NopCloser(bytes.NewReader([]byte{})), nil
+	}
+	return config.Tracing.Jaeger.InitGlobalTracer(
+		serviceName,
+		jaegerconfig.Logger(logrusLogger{logrus.StandardLogger()}),
+		jaegerconfig.Metrics(jaegermetrics.NullFactory),
+	)
+}
+
+// logrusLogger is a small wrapper that implements jaeger.Logger using logrus.
+type logrusLogger struct {
+	l *logrus.Logger
+}
+
+func (l logrusLogger) Error(msg string) {
+	l.l.Error(msg)
+}
+
+func (l logrusLogger) Infof(msg string, args ...interface{}) {
+	l.l.Infof(msg, args...)
+}
diff --git a/setup/config/config_appservice.go b/setup/config/config_appservice.go
new file mode 100644
index 00000000..a042691d
--- /dev/null
+++ b/setup/config/config_appservice.go
@@ -0,0 +1,353 @@
+// Copyright 2017 Andrew Morgan <andrew@amorgan.xyz>
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package config
+
+import (
+	"fmt"
+	"io/ioutil"
+	"path/filepath"
+	"regexp"
+	"strings"
+
+	log "github.com/sirupsen/logrus"
+	yaml "gopkg.in/yaml.v2"
+)
+
+type AppServiceAPI struct {
+	Matrix  *Global  `yaml:"-"`
+	Derived *Derived `yaml:"-"` // TODO: Nuke Derived from orbit
+
+	InternalAPI InternalAPIOptions `yaml:"internal_api"`
+
+	Database DatabaseOptions `yaml:"database"`
+
+	ConfigFiles []string `yaml:"config_files"`
+}
+
+func (c *AppServiceAPI) Defaults() {
+	c.InternalAPI.Listen = "http://localhost:7777"
+	c.InternalAPI.Connect = "http://localhost:7777"
+	c.Database.Defaults()
+	c.Database.ConnectionString = "file:appservice.db"
+}
+
+func (c *AppServiceAPI) Verify(configErrs *ConfigErrors, isMonolith bool) {
+	checkURL(configErrs, "app_service_api.internal_api.listen", string(c.InternalAPI.Listen))
+	checkURL(configErrs, "app_service_api.internal_api.bind", string(c.InternalAPI.Connect))
+	checkNotEmpty(configErrs, "app_service_api.database.connection_string", string(c.Database.ConnectionString))
+}
+
+// ApplicationServiceNamespace is the namespace that a specific application
+// service has management over.
+type ApplicationServiceNamespace struct {
+	// Whether or not the namespace is managed solely by this application service
+	Exclusive bool `yaml:"exclusive"`
+	// A regex pattern that represents the namespace
+	Regex string `yaml:"regex"`
+	// The ID of an existing group that all users of this application service will
+	// be added to. This field is only relevant to the `users` namespace.
+	// Note that users who are joined to this group through an application service
+	// are not to be listed when querying for the group's members, however the
+	// group should be listed when querying an application service user's groups.
+	// This is to prevent making spamming all users of an application service
+	// trivial.
+	GroupID string `yaml:"group_id"`
+	// Regex object representing our pattern. Saves having to recompile every time
+	RegexpObject *regexp.Regexp
+}
+
+// ApplicationService represents a Matrix application service.
+// https://matrix.org/docs/spec/application_service/unstable.html
+type ApplicationService struct {
+	// User-defined, unique, persistent ID of the application service
+	ID string `yaml:"id"`
+	// Base URL of the application service
+	URL string `yaml:"url"`
+	// Application service token provided in requests to a homeserver
+	ASToken string `yaml:"as_token"`
+	// Homeserver token provided in requests to an application service
+	HSToken string `yaml:"hs_token"`
+	// Localpart of application service user
+	SenderLocalpart string `yaml:"sender_localpart"`
+	// Information about an application service's namespaces. Key is either
+	// "users", "aliases" or "rooms"
+	NamespaceMap map[string][]ApplicationServiceNamespace `yaml:"namespaces"`
+	// Whether rate limiting is applied to each application service user
+	RateLimited bool `yaml:"rate_limited"`
+	// Any custom protocols that this application service provides (e.g. IRC)
+	Protocols []string `yaml:"protocols"`
+}
+
+// IsInterestedInRoomID returns a bool on whether an application service's
+// namespace includes the given room ID
+func (a *ApplicationService) IsInterestedInRoomID(
+	roomID string,
+) bool {
+	if namespaceSlice, ok := a.NamespaceMap["rooms"]; ok {
+		for _, namespace := range namespaceSlice {
+			if namespace.RegexpObject.MatchString(roomID) {
+				return true
+			}
+		}
+	}
+
+	return false
+}
+
+// IsInterestedInUserID returns a bool on whether an application service's
+// namespace includes the given user ID
+func (a *ApplicationService) IsInterestedInUserID(
+	userID string,
+) bool {
+	if namespaceSlice, ok := a.NamespaceMap["users"]; ok {
+		for _, namespace := range namespaceSlice {
+			if namespace.RegexpObject.MatchString(userID) {
+				return true
+			}
+		}
+	}
+
+	return false
+}
+
+// OwnsNamespaceCoveringUserId returns a bool on whether an application service's
+// namespace is exclusive and includes the given user ID
+func (a *ApplicationService) OwnsNamespaceCoveringUserId(
+	userID string,
+) bool {
+	if namespaceSlice, ok := a.NamespaceMap["users"]; ok {
+		for _, namespace := range namespaceSlice {
+			if namespace.Exclusive && namespace.RegexpObject.MatchString(userID) {
+				return true
+			}
+		}
+	}
+
+	return false
+}
+
+// IsInterestedInRoomAlias returns a bool on whether an application service's
+// namespace includes the given room alias
+func (a *ApplicationService) IsInterestedInRoomAlias(
+	roomAlias string,
+) bool {
+	if namespaceSlice, ok := a.NamespaceMap["aliases"]; ok {
+		for _, namespace := range namespaceSlice {
+			if namespace.RegexpObject.MatchString(roomAlias) {
+				return true
+			}
+		}
+	}
+
+	return false
+}
+
+// loadAppServices iterates through all application service config files
+// and loads their data into the config object for later access.
+func loadAppServices(config *AppServiceAPI, derived *Derived) error {
+	for _, configPath := range config.ConfigFiles {
+		// Create a new application service with default options
+		appservice := ApplicationService{
+			RateLimited: true,
+		}
+
+		// Create an absolute path from a potentially relative path
+		absPath, err := filepath.Abs(configPath)
+		if err != nil {
+			return err
+		}
+
+		// Read the application service's config file
+		configData, err := ioutil.ReadFile(absPath)
+		if err != nil {
+			return err
+		}
+
+		// Load the config data into our struct
+		if err = yaml.UnmarshalStrict(configData, &appservice); err != nil {
+			return err
+		}
+
+		// Append the parsed application service to the global config
+		derived.ApplicationServices = append(
+			derived.ApplicationServices, appservice,
+		)
+	}
+
+	// Check for any errors in the loaded application services
+	return checkErrors(config, derived)
+}
+
+// setupRegexps will create regex objects for exclusive and non-exclusive
+// usernames, aliases and rooms of all application services, so that other
+// methods can quickly check if a particular string matches any of them.
+func setupRegexps(_ *AppServiceAPI, derived *Derived) (err error) {
+	// Combine all exclusive namespaces for later string checking
+	var exclusiveUsernameStrings, exclusiveAliasStrings []string
+
+	// If an application service's regex is marked as exclusive, add
+	// its contents to the overall exlusive regex string. Room regex
+	// not necessary as we aren't denying exclusive room ID creation
+	for _, appservice := range derived.ApplicationServices {
+		for key, namespaceSlice := range appservice.NamespaceMap {
+			switch key {
+			case "users":
+				appendExclusiveNamespaceRegexs(&exclusiveUsernameStrings, namespaceSlice)
+			case "aliases":
+				appendExclusiveNamespaceRegexs(&exclusiveAliasStrings, namespaceSlice)
+			}
+		}
+	}
+
+	// Join the regexes together into one big regex.
+	// i.e. "app1.*", "app2.*" -> "(app1.*)|(app2.*)"
+	// Later we can check if a username or alias matches any exclusive regex and
+	// deny access if it isn't from an application service
+	exclusiveUsernames := strings.Join(exclusiveUsernameStrings, "|")
+	exclusiveAliases := strings.Join(exclusiveAliasStrings, "|")
+
+	// If there are no exclusive regexes, compile string so that it will not match
+	// any valid usernames/aliases/roomIDs
+	if exclusiveUsernames == "" {
+		exclusiveUsernames = "^$"
+	}
+	if exclusiveAliases == "" {
+		exclusiveAliases = "^$"
+	}
+
+	// Store compiled Regex
+	if derived.ExclusiveApplicationServicesUsernameRegexp, err = regexp.Compile(exclusiveUsernames); err != nil {
+		return err
+	}
+	if derived.ExclusiveApplicationServicesAliasRegexp, err = regexp.Compile(exclusiveAliases); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// appendExclusiveNamespaceRegexs takes a slice of strings and a slice of
+// namespaces and will append the regexes of only the exclusive namespaces
+// into the string slice
+func appendExclusiveNamespaceRegexs(
+	exclusiveStrings *[]string, namespaces []ApplicationServiceNamespace,
+) {
+	for index, namespace := range namespaces {
+		if namespace.Exclusive {
+			// We append parenthesis to later separate each regex when we compile
+			// i.e. "app1.*", "app2.*" -> "(app1.*)|(app2.*)"
+			*exclusiveStrings = append(*exclusiveStrings, "("+namespace.Regex+")")
+		}
+
+		// Compile this regex into a Regexp object for later use
+		namespaces[index].RegexpObject, _ = regexp.Compile(namespace.Regex)
+	}
+}
+
+// checkErrors checks for any configuration errors amongst the loaded
+// application services according to the application service spec.
+func checkErrors(config *AppServiceAPI, derived *Derived) (err error) {
+	var idMap = make(map[string]bool)
+	var tokenMap = make(map[string]bool)
+
+	// Compile regexp object for checking groupIDs
+	groupIDRegexp := regexp.MustCompile(`\+.*:.*`)
+
+	// Check each application service for any config errors
+	for _, appservice := range derived.ApplicationServices {
+		// Namespace-related checks
+		for key, namespaceSlice := range appservice.NamespaceMap {
+			for _, namespace := range namespaceSlice {
+				if err := validateNamespace(&appservice, key, &namespace, groupIDRegexp); err != nil {
+					return err
+				}
+			}
+		}
+
+		// Check if the url has trailing /'s. If so, remove them
+		appservice.URL = strings.TrimRight(appservice.URL, "/")
+
+		// Check if we've already seen this ID. No two application services
+		// can have the same ID or token.
+		if idMap[appservice.ID] {
+			return ConfigErrors([]string{fmt.Sprintf(
+				"Application service ID %s must be unique", appservice.ID,
+			)})
+		}
+		// Check if we've already seen this token
+		if tokenMap[appservice.ASToken] {
+			return ConfigErrors([]string{fmt.Sprintf(
+				"Application service Token %s must be unique", appservice.ASToken,
+			)})
+		}
+
+		// Add the id/token to their respective maps if we haven't already
+		// seen them.
+		idMap[appservice.ID] = true
+		tokenMap[appservice.ASToken] = true
+
+		// TODO: Remove once rate_limited is implemented
+		if appservice.RateLimited {
+			log.Warn("WARNING: Application service option rate_limited is currently unimplemented")
+		}
+		// TODO: Remove once protocols is implemented
+		if len(appservice.Protocols) > 0 {
+			log.Warn("WARNING: Application service option protocols is currently unimplemented")
+		}
+	}
+
+	return setupRegexps(config, derived)
+}
+
+// validateNamespace returns nil or an error based on whether a given
+// application service namespace is valid. A namespace is valid if it has the
+// required fields, and its regex is correct.
+func validateNamespace(
+	appservice *ApplicationService,
+	key string,
+	namespace *ApplicationServiceNamespace,
+	groupIDRegexp *regexp.Regexp,
+) error {
+	// Check that namespace(s) are valid regex
+	if !IsValidRegex(namespace.Regex) {
+		return ConfigErrors([]string{fmt.Sprintf(
+			"Invalid regex string for Application Service %s", appservice.ID,
+		)})
+	}
+
+	// Check if GroupID for the users namespace is in the correct format
+	if key == "users" && namespace.GroupID != "" {
+		// TODO: Remove once group_id is implemented
+		log.Warn("WARNING: Application service option group_id is currently unimplemented")
+
+		correctFormat := groupIDRegexp.MatchString(namespace.GroupID)
+		if !correctFormat {
+			return ConfigErrors([]string{fmt.Sprintf(
+				"Invalid user group_id field for application service %s.",
+				appservice.ID,
+			)})
+		}
+	}
+
+	return nil
+}
+
+// IsValidRegex returns true or false based on whether the
+// given string is valid regex or not
+func IsValidRegex(regexString string) bool {
+	_, err := regexp.Compile(regexString)
+
+	return err == nil
+}
diff --git a/setup/config/config_clientapi.go b/setup/config/config_clientapi.go
new file mode 100644
index 00000000..52115491
--- /dev/null
+++ b/setup/config/config_clientapi.go
@@ -0,0 +1,123 @@
+package config
+
+import (
+	"fmt"
+	"time"
+)
+
+type ClientAPI struct {
+	Matrix  *Global  `yaml:"-"`
+	Derived *Derived `yaml:"-"` // TODO: Nuke Derived from orbit
+
+	InternalAPI InternalAPIOptions `yaml:"internal_api"`
+	ExternalAPI ExternalAPIOptions `yaml:"external_api"`
+
+	// If set disables new users from registering (except via shared
+	// secrets)
+	RegistrationDisabled bool `yaml:"registration_disabled"`
+	// If set, allows registration by anyone who also has the shared
+	// secret, even if registration is otherwise disabled.
+	RegistrationSharedSecret string `yaml:"registration_shared_secret"`
+
+	// Boolean stating whether catpcha registration is enabled
+	// and required
+	RecaptchaEnabled bool `yaml:"enable_registration_captcha"`
+	// This Home Server's ReCAPTCHA public key.
+	RecaptchaPublicKey string `yaml:"recaptcha_public_key"`
+	// This Home Server's ReCAPTCHA private key.
+	RecaptchaPrivateKey string `yaml:"recaptcha_private_key"`
+	// Secret used to bypass the captcha registration entirely
+	RecaptchaBypassSecret string `yaml:"recaptcha_bypass_secret"`
+	// HTTP API endpoint used to verify whether the captcha response
+	// was successful
+	RecaptchaSiteVerifyAPI string `yaml:"recaptcha_siteverify_api"`
+
+	// TURN options
+	TURN TURN `yaml:"turn"`
+
+	// Rate-limiting options
+	RateLimiting RateLimiting `yaml:"rate_limiting"`
+}
+
+func (c *ClientAPI) Defaults() {
+	c.InternalAPI.Listen = "http://localhost:7771"
+	c.InternalAPI.Connect = "http://localhost:7771"
+	c.ExternalAPI.Listen = "http://[::]:8071"
+	c.RegistrationSharedSecret = ""
+	c.RecaptchaPublicKey = ""
+	c.RecaptchaPrivateKey = ""
+	c.RecaptchaEnabled = false
+	c.RecaptchaBypassSecret = ""
+	c.RecaptchaSiteVerifyAPI = ""
+	c.RegistrationDisabled = false
+	c.RateLimiting.Defaults()
+}
+
+func (c *ClientAPI) Verify(configErrs *ConfigErrors, isMonolith bool) {
+	checkURL(configErrs, "client_api.internal_api.listen", string(c.InternalAPI.Listen))
+	checkURL(configErrs, "client_api.internal_api.connect", string(c.InternalAPI.Connect))
+	if !isMonolith {
+		checkURL(configErrs, "client_api.external_api.listen", string(c.ExternalAPI.Listen))
+	}
+	if c.RecaptchaEnabled {
+		checkNotEmpty(configErrs, "client_api.recaptcha_public_key", string(c.RecaptchaPublicKey))
+		checkNotEmpty(configErrs, "client_api.recaptcha_private_key", string(c.RecaptchaPrivateKey))
+		checkNotEmpty(configErrs, "client_api.recaptcha_siteverify_api", string(c.RecaptchaSiteVerifyAPI))
+	}
+	c.TURN.Verify(configErrs)
+	c.RateLimiting.Verify(configErrs)
+}
+
+type TURN struct {
+	// TODO Guest Support
+	// Whether or not guests can request TURN credentials
+	// AllowGuests bool `yaml:"turn_allow_guests"`
+	// How long the authorization should last
+	UserLifetime string `yaml:"turn_user_lifetime"`
+	// The list of TURN URIs to pass to clients
+	URIs []string `yaml:"turn_uris"`
+
+	// Authorization via Shared Secret
+	// The shared secret from coturn
+	SharedSecret string `yaml:"turn_shared_secret"`
+
+	// Authorization via Static Username & Password
+	// Hardcoded Username and Password
+	Username string `yaml:"turn_username"`
+	Password string `yaml:"turn_password"`
+}
+
+func (c *TURN) Verify(configErrs *ConfigErrors) {
+	value := c.UserLifetime
+	if value != "" {
+		if _, err := time.ParseDuration(value); err != nil {
+			configErrs.Add(fmt.Sprintf("invalid duration for config key %q: %s", "client_api.turn.turn_user_lifetime", value))
+		}
+	}
+}
+
+type RateLimiting struct {
+	// Is rate limiting enabled or disabled?
+	Enabled bool `yaml:"enabled"`
+
+	// How many "slots" a user can occupy sending requests to a rate-limited
+	// endpoint before we apply rate-limiting
+	Threshold int64 `yaml:"threshold"`
+
+	// The cooloff period in milliseconds after a request before the "slot"
+	// is freed again
+	CooloffMS int64 `yaml:"cooloff_ms"`
+}
+
+func (r *RateLimiting) Verify(configErrs *ConfigErrors) {
+	if r.Enabled {
+		checkPositive(configErrs, "client_api.rate_limiting.threshold", r.Threshold)
+		checkPositive(configErrs, "client_api.rate_limiting.cooloff_ms", r.CooloffMS)
+	}
+}
+
+func (r *RateLimiting) Defaults() {
+	r.Enabled = true
+	r.Threshold = 5
+	r.CooloffMS = 500
+}
diff --git a/setup/config/config_eduserver.go b/setup/config/config_eduserver.go
new file mode 100644
index 00000000..a2ff3697
--- /dev/null
+++ b/setup/config/config_eduserver.go
@@ -0,0 +1,17 @@
+package config
+
+type EDUServer struct {
+	Matrix *Global `yaml:"-"`
+
+	InternalAPI InternalAPIOptions `yaml:"internal_api"`
+}
+
+func (c *EDUServer) Defaults() {
+	c.InternalAPI.Listen = "http://localhost:7778"
+	c.InternalAPI.Connect = "http://localhost:7778"
+}
+
+func (c *EDUServer) Verify(configErrs *ConfigErrors, isMonolith bool) {
+	checkURL(configErrs, "edu_server.internal_api.listen", string(c.InternalAPI.Listen))
+	checkURL(configErrs, "edu_server.internal_api.connect", string(c.InternalAPI.Connect))
+}
diff --git a/setup/config/config_federationapi.go b/setup/config/config_federationapi.go
new file mode 100644
index 00000000..64803d95
--- /dev/null
+++ b/setup/config/config_federationapi.go
@@ -0,0 +1,31 @@
+package config
+
+type FederationAPI struct {
+	Matrix *Global `yaml:"-"`
+
+	InternalAPI InternalAPIOptions `yaml:"internal_api"`
+	ExternalAPI ExternalAPIOptions `yaml:"external_api"`
+
+	// List of paths to X509 certificates used by the external federation listeners.
+	// These are used to calculate the TLS fingerprints to publish for this server.
+	// Other matrix servers talking to this server will expect the x509 certificate
+	// to match one of these certificates.
+	// The certificates should be in PEM format.
+	FederationCertificatePaths []Path `yaml:"federation_certificates"`
+}
+
+func (c *FederationAPI) Defaults() {
+	c.InternalAPI.Listen = "http://localhost:7772"
+	c.InternalAPI.Connect = "http://localhost:7772"
+	c.ExternalAPI.Listen = "http://[::]:8072"
+}
+
+func (c *FederationAPI) Verify(configErrs *ConfigErrors, isMonolith bool) {
+	checkURL(configErrs, "federation_api.internal_api.listen", string(c.InternalAPI.Listen))
+	checkURL(configErrs, "federation_api.internal_api.connect", string(c.InternalAPI.Connect))
+	if !isMonolith {
+		checkURL(configErrs, "federation_api.external_api.listen", string(c.ExternalAPI.Listen))
+	}
+	// TODO: not applicable always, e.g. in demos
+	//checkNotZero(configErrs, "federation_api.federation_certificates", int64(len(c.FederationCertificatePaths)))
+}
diff --git a/setup/config/config_federationsender.go b/setup/config/config_federationsender.go
new file mode 100644
index 00000000..84f5b6f4
--- /dev/null
+++ b/setup/config/config_federationsender.go
@@ -0,0 +1,63 @@
+package config
+
+type FederationSender struct {
+	Matrix *Global `yaml:"-"`
+
+	InternalAPI InternalAPIOptions `yaml:"internal_api"`
+
+	// The FederationSender database stores information used by the FederationSender
+	// It is only accessed by the FederationSender.
+	Database DatabaseOptions `yaml:"database"`
+
+	// Federation failure threshold. How many consecutive failures that we should
+	// tolerate when sending federation requests to a specific server. The backoff
+	// is 2**x seconds, so 1 = 2 seconds, 2 = 4 seconds, 3 = 8 seconds, etc.
+	// The default value is 16 if not specified, which is circa 18 hours.
+	FederationMaxRetries uint32 `yaml:"send_max_retries"`
+
+	// FederationDisableTLSValidation disables the validation of X.509 TLS certs
+	// on remote federation endpoints. This is not recommended in production!
+	DisableTLSValidation bool `yaml:"disable_tls_validation"`
+
+	Proxy Proxy `yaml:"proxy_outbound"`
+}
+
+func (c *FederationSender) Defaults() {
+	c.InternalAPI.Listen = "http://localhost:7775"
+	c.InternalAPI.Connect = "http://localhost:7775"
+	c.Database.Defaults()
+	c.Database.ConnectionString = "file:federationsender.db"
+
+	c.FederationMaxRetries = 16
+	c.DisableTLSValidation = false
+
+	c.Proxy.Defaults()
+}
+
+func (c *FederationSender) Verify(configErrs *ConfigErrors, isMonolith bool) {
+	checkURL(configErrs, "federation_sender.internal_api.listen", string(c.InternalAPI.Listen))
+	checkURL(configErrs, "federation_sender.internal_api.connect", string(c.InternalAPI.Connect))
+	checkNotEmpty(configErrs, "federation_sender.database.connection_string", string(c.Database.ConnectionString))
+}
+
+// The config for setting a proxy to use for server->server requests
+type Proxy struct {
+	// Is the proxy enabled?
+	Enabled bool `yaml:"enabled"`
+	// The protocol for the proxy (http / https / socks5)
+	Protocol string `yaml:"protocol"`
+	// The host where the proxy is listening
+	Host string `yaml:"host"`
+	// The port on which the proxy is listening
+	Port uint16 `yaml:"port"`
+}
+
+func (c *Proxy) Defaults() {
+	c.Enabled = false
+	c.Protocol = "http"
+	c.Host = "localhost"
+	c.Port = 8080
+}
+
+func (c *Proxy) Verify(configErrs *ConfigErrors) {
+}
diff --git a/setup/config/config_global.go b/setup/config/config_global.go
new file mode 100644
index 00000000..95652217
--- /dev/null
+++ b/setup/config/config_global.go
@@ -0,0 +1,142 @@
+package config
+
+import (
+	"math/rand"
+	"time"
+
+	"github.com/matrix-org/gomatrixserverlib"
+	"golang.org/x/crypto/ed25519"
+)
+
+type Global struct {
+	// The name of the server. This is usually the domain name, e.g 'matrix.org', 'localhost'.
+	ServerName gomatrixserverlib.ServerName `yaml:"server_name"`
+
+	// Path to the private key which will be used to sign requests and events.
+	PrivateKeyPath Path `yaml:"private_key"`
+
+	// The private key which will be used to sign requests and events.
+	PrivateKey ed25519.PrivateKey `yaml:"-"`
+
+	// An arbitrary string used to uniquely identify the PrivateKey. Must start with the
+	// prefix "ed25519:".
+	KeyID gomatrixserverlib.KeyID `yaml:"-"`
+
+	// Information about old private keys that used to be used to sign requests and
+	// events on this domain. They will not be used but will be advertised to other
+	// servers that ask for them to help verify old events.
+	OldVerifyKeys []OldVerifyKeys `yaml:"old_private_keys"`
+
+	// How long a remote server can cache our server key for before requesting it again.
+	// Increasing this number will reduce the number of requests made by remote servers
+	// for our key, but increases the period a compromised key will be considered valid
+	// by remote servers.
+	// Defaults to 24 hours.
+	KeyValidityPeriod time.Duration `yaml:"key_validity_period"`
+
+	// Disables federation. Dendrite will not be able to make any outbound HTTP requests
+	// to other servers and the federation API will not be exposed.
+	DisableFederation bool `yaml:"disable_federation"`
+
+	// List of domains that the server will trust as identity servers to
+	// verify third-party identifiers.
+	// Defaults to an empty array.
+	TrustedIDServers []string `yaml:"trusted_third_party_id_servers"`
+
+	// Kafka/Naffka configuration
+	Kafka Kafka `yaml:"kafka"`
+
+	// Metrics configuration
+	Metrics Metrics `yaml:"metrics"`
+}
+
+func (c *Global) Defaults() {
+	c.ServerName = "localhost"
+	c.PrivateKeyPath = "matrix_key.pem"
+	_, c.PrivateKey, _ = ed25519.GenerateKey(rand.New(rand.NewSource(0)))
+	c.KeyID = "ed25519:auto"
+	c.KeyValidityPeriod = time.Hour * 24 * 7
+
+	c.Kafka.Defaults()
+	c.Metrics.Defaults()
+}
+
+func (c *Global) Verify(configErrs *ConfigErrors, isMonolith bool) {
+	checkNotEmpty(configErrs, "global.server_name", string(c.ServerName))
+	checkNotEmpty(configErrs, "global.private_key", string(c.PrivateKeyPath))
+
+	c.Kafka.Verify(configErrs, isMonolith)
+	c.Metrics.Verify(configErrs, isMonolith)
+}
+
+type OldVerifyKeys struct {
+	// Path to the private key.
+	PrivateKeyPath Path `yaml:"private_key"`
+
+	// The private key itself.
+	PrivateKey ed25519.PrivateKey `yaml:"-"`
+
+	// The key ID of the private key.
+	KeyID gomatrixserverlib.KeyID `yaml:"-"`
+
+	// When the private key was designed as "expired", as a UNIX timestamp
+	// in millisecond precision.
+	ExpiredAt gomatrixserverlib.Timestamp `yaml:"expired_at"`
+}
+
+// The configuration to use for Prometheus metrics
+type Metrics struct {
+	// Whether or not the metrics are enabled
+	Enabled bool `yaml:"enabled"`
+	// Use BasicAuth for Authorization
+	BasicAuth struct {
+		// Authorization via Static Username & Password
+		// Hardcoded Username and Password
+		Username string `yaml:"username"`
+		Password string `yaml:"password"`
+	} `yaml:"basic_auth"`
+}
+
+func (c *Metrics) Defaults() {
+	c.Enabled = false
+	c.BasicAuth.Username = "metrics"
+	c.BasicAuth.Password = "metrics"
+}
+
+func (c *Metrics) Verify(configErrs *ConfigErrors, isMonolith bool) {
+}
+
+type DatabaseOptions struct {
+	// The connection string, file:filename.db or postgres://server....
+	ConnectionString DataSource `yaml:"connection_string"`
+	// Maximum open connections to the DB (0 = use default, negative means unlimited)
+	MaxOpenConnections int `yaml:"max_open_conns"`
+	// Maximum idle connections to the DB (0 = use default, negative means unlimited)
+	MaxIdleConnections int `yaml:"max_idle_conns"`
+	// maximum amount of time (in seconds) a connection may be reused (<= 0 means unlimited)
+	ConnMaxLifetimeSeconds int `yaml:"conn_max_lifetime"`
+}
+
+func (c *DatabaseOptions) Defaults() {
+	c.MaxOpenConnections = 100
+	c.MaxIdleConnections = 2
+	c.ConnMaxLifetimeSeconds = -1
+}
+
+func (c *DatabaseOptions) Verify(configErrs *ConfigErrors, isMonolith bool) {
+}
+
+// MaxIdleConns returns maximum idle connections to the DB
+func (c DatabaseOptions) MaxIdleConns() int {
+	return c.MaxIdleConnections
+}
+
+// MaxOpenConns returns maximum open connections to the DB
+func (c DatabaseOptions) MaxOpenConns() int {
+	return c.MaxOpenConnections
+}
+
+// ConnMaxLifetime returns maximum amount of time a connection may be reused
+func (c DatabaseOptions) ConnMaxLifetime() time.Duration {
+	return time.Duration(c.ConnMaxLifetimeSeconds) * time.Second
+}
diff --git a/setup/config/config_kafka.go b/setup/config/config_kafka.go
new file mode 100644
index 00000000..aa91e558
--- /dev/null
+++ b/setup/config/config_kafka.go
@@ -0,0 +1,61 @@
+package config
+
+import "fmt"
+
+// Defined Kafka topics.
+const (
+	TopicOutputTypingEvent       = "OutputTypingEvent"
+	TopicOutputSendToDeviceEvent = "OutputSendToDeviceEvent"
+	TopicOutputKeyChangeEvent    = "OutputKeyChangeEvent"
+	TopicOutputRoomEvent         = "OutputRoomEvent"
+	TopicOutputClientData        = "OutputClientData"
+	TopicOutputReceiptEvent      = "OutputReceiptEvent"
+)
+
+type Kafka struct {
+	// A list of kafka addresses to connect to.
+	Addresses []string `yaml:"addresses"`
+	// The prefix to use for Kafka topic names for this homeserver - really only
+	// useful if running more than one Dendrite on the same Kafka deployment.
+	TopicPrefix string `yaml:"topic_prefix"`
+	// Whether to use naffka instead of kafka.
+	// Naffka can only be used when running dendrite as a single monolithic server.
+	// Kafka can be used both with a monolithic server and when running the
+	// components as separate servers.
+	UseNaffka bool `yaml:"use_naffka"`
+	// The Naffka database is used internally by the naffka library, if used.
+	Database DatabaseOptions `yaml:"naffka_database"`
+	// The max size a Kafka message passed between consumer/producer can have
+	// Equals roughly max.message.bytes / fetch.message.max.bytes in Kafka
+	MaxMessageBytes *int `yaml:"max_message_bytes"`
+}
+
+func (k *Kafka) TopicFor(name string) string {
+	return fmt.Sprintf("%s%s", k.TopicPrefix, name)
+}
+
+func (c *Kafka) Defaults() {
+	c.UseNaffka = true
+	c.Database.Defaults()
+	c.Addresses = []string{"localhost:2181"}
+	c.Database.ConnectionString = DataSource("file:naffka.db")
+	c.TopicPrefix = "Dendrite"
+
+	maxBytes := 1024 * 1024 * 8 // about 8MB
+	c.MaxMessageBytes = &maxBytes
+}
+
+func (c *Kafka) Verify(configErrs *ConfigErrors, isMonolith bool) {
+	if c.UseNaffka {
+		if !isMonolith {
+			configErrs.Add("naffka can only be used in a monolithic server")
+		}
+		checkNotEmpty(configErrs, "global.kafka.database.connection_string", string(c.Database.ConnectionString))
+	} else {
+		// If we aren't using naffka then we need to have at least one kafka
+		// server to talk to.
+		checkNotZero(configErrs, "global.kafka.addresses", int64(len(c.Addresses)))
+	}
+	checkNotEmpty(configErrs, "global.kafka.topic_prefix", string(c.TopicPrefix))
+	checkPositive(configErrs, "global.kafka.max_message_bytes", int64(*c.MaxMessageBytes))
+}
diff --git a/setup/config/config_keyserver.go b/setup/config/config_keyserver.go
new file mode 100644
index 00000000..89162300
--- /dev/null
+++ b/setup/config/config_keyserver.go
@@ -0,0 +1,22 @@
+package config
+
+type KeyServer struct {
+	Matrix *Global `yaml:"-"`
+
+	InternalAPI InternalAPIOptions `yaml:"internal_api"`
+
+	Database DatabaseOptions `yaml:"database"`
+}
+
+func (c *KeyServer) Defaults() {
+	c.InternalAPI.Listen = "http://localhost:7779"
+	c.InternalAPI.Connect = "http://localhost:7779"
+	c.Database.Defaults()
+	c.Database.ConnectionString = "file:keyserver.db"
+}
+
+func (c *KeyServer) Verify(configErrs *ConfigErrors, isMonolith bool) {
+	checkURL(configErrs, "key_server.internal_api.listen", string(c.InternalAPI.Listen))
+	checkURL(configErrs, "key_server.internal_api.bind", string(c.InternalAPI.Connect))
+	checkNotEmpty(configErrs, "key_server.database.connection_string", string(c.Database.ConnectionString))
+}
diff --git a/setup/config/config_mediaapi.go b/setup/config/config_mediaapi.go
new file mode 100644
index 00000000..a9425b7b
--- /dev/null
+++ b/setup/config/config_mediaapi.go
@@ -0,0 +1,67 @@
+package config
+
+import (
+	"fmt"
+)
+
+type MediaAPI struct {
+	Matrix *Global `yaml:"-"`
+
+	InternalAPI InternalAPIOptions `yaml:"internal_api"`
+	ExternalAPI ExternalAPIOptions `yaml:"external_api"`
+
+	// The MediaAPI database stores information about files uploaded and downloaded
+	// by local users. It is only accessed by the MediaAPI.
+	Database DatabaseOptions `yaml:"database"`
+
+	// The base path to where the media files will be stored. May be relative or absolute.
+	BasePath Path `yaml:"base_path"`
+
+	// The absolute base path to where media files will be stored.
+	AbsBasePath Path `yaml:"-"`
+
+	// The maximum file size in bytes that is allowed to be stored on this server.
+	// Note: if max_file_size_bytes is set to 0, the size is unlimited.
+	// Note: if max_file_size_bytes is not set, it will default to 10485760 (10MB)
+	MaxFileSizeBytes *FileSizeBytes `yaml:"max_file_size_bytes,omitempty"`
+
+	// Whether to dynamically generate thumbnails on-the-fly if the requested resolution is not already generated
+	DynamicThumbnails bool `yaml:"dynamic_thumbnails"`
+
+	// The maximum number of simultaneous thumbnail generators. default: 10
+	MaxThumbnailGenerators int `yaml:"max_thumbnail_generators"`
+
+	// A list of thumbnail sizes to be pre-generated for downloaded remote / uploaded content
+	ThumbnailSizes []ThumbnailSize `yaml:"thumbnail_sizes"`
+}
+
+func (c *MediaAPI) Defaults() {
+	c.InternalAPI.Listen = "http://localhost:7774"
+	c.InternalAPI.Connect = "http://localhost:7774"
+	c.ExternalAPI.Listen = "http://[::]:8074"
+	c.Database.Defaults()
+	c.Database.ConnectionString = "file:mediaapi.db"
+
+	defaultMaxFileSizeBytes := FileSizeBytes(10485760)
+	c.MaxFileSizeBytes = &defaultMaxFileSizeBytes
+	c.MaxThumbnailGenerators = 10
+	c.BasePath = "./media_store"
+}
+
+func (c *MediaAPI) Verify(configErrs *ConfigErrors, isMonolith bool) {
+	checkURL(configErrs, "media_api.internal_api.listen", string(c.InternalAPI.Listen))
+	checkURL(configErrs, "media_api.internal_api.connect", string(c.InternalAPI.Connect))
+	if !isMonolith {
+		checkURL(configErrs, "media_api.external_api.listen", string(c.ExternalAPI.Listen))
+	}
+	checkNotEmpty(configErrs, "media_api.database.connection_string", string(c.Database.ConnectionString))
+
+	checkNotEmpty(configErrs, "media_api.base_path", string(c.BasePath))
+	checkPositive(configErrs, "media_api.max_file_size_bytes", int64(*c.MaxFileSizeBytes))
+	checkPositive(configErrs, "media_api.max_thumbnail_generators", int64(c.MaxThumbnailGenerators))
+
+	for i, size := range c.ThumbnailSizes {
+		checkPositive(configErrs, fmt.Sprintf("media_api.thumbnail_sizes[%d].width", i), int64(size.Width))
+		checkPositive(configErrs, fmt.Sprintf("media_api.thumbnail_sizes[%d].height", i), int64(size.Height))
+	}
+}
diff --git a/setup/config/config_mscs.go b/setup/config/config_mscs.go
new file mode 100644
index 00000000..776d0b64
--- /dev/null
+++ b/setup/config/config_mscs.go
@@ -0,0 +1,19 @@
+package config
+
+type MSCs struct {
+	Matrix *Global `yaml:"-"`
+
+	// The MSCs to enable, currently only `msc2836` is supported.
+	MSCs []string `yaml:"mscs"`
+
+	Database DatabaseOptions `yaml:"database"`
+}
+
+func (c *MSCs) Defaults() {
+	c.Database.Defaults()
+	c.Database.ConnectionString = "file:mscs.db"
+}
+
+func (c *MSCs) Verify(configErrs *ConfigErrors, isMonolith bool) {
+	checkNotEmpty(configErrs, "mscs.database.connection_string", string(c.Database.ConnectionString))
+}
diff --git a/setup/config/config_roomserver.go b/setup/config/config_roomserver.go
new file mode 100644
index 00000000..2a1fc38b
--- /dev/null
+++ b/setup/config/config_roomserver.go
@@ -0,0 +1,22 @@
+package config
+
+type RoomServer struct {
+	Matrix *Global `yaml:"-"`
+
+	InternalAPI InternalAPIOptions `yaml:"internal_api"`
+
+	Database DatabaseOptions `yaml:"database"`
+}
+
+func (c *RoomServer) Defaults() {
+	c.InternalAPI.Listen = "http://localhost:7770"
+	c.InternalAPI.Connect = "http://localhost:7770"
+	c.Database.Defaults()
+	c.Database.ConnectionString = "file:roomserver.db"
+}
+
+func (c *RoomServer) Verify(configErrs *ConfigErrors, isMonolith bool) {
+	checkURL(configErrs, "room_server.internal_api.listen", string(c.InternalAPI.Listen))
+	checkURL(configErrs, "room_server.internal_ap.bind", string(c.InternalAPI.Connect))
+	checkNotEmpty(configErrs, "room_server.database.connection_string", string(c.Database.ConnectionString))
+}
diff --git a/setup/config/config_signingkeyserver.go b/setup/config/config_signingkeyserver.go
new file mode 100644
index 00000000..51aca38b
--- /dev/null
+++ b/setup/config/config_signingkeyserver.go
@@ -0,0 +1,52 @@
+package config
+
+import "github.com/matrix-org/gomatrixserverlib"
+
+type SigningKeyServer struct {
+	Matrix *Global `yaml:"-"`
+
+	InternalAPI InternalAPIOptions `yaml:"internal_api"`
+
+	// The SigningKeyServer database caches the public keys of remote servers.
+	// It may be accessed by the FederationAPI, the ClientAPI, and the MediaAPI.
+	Database DatabaseOptions `yaml:"database"`
+
+	// Perspective keyservers, to use as a backup when direct key fetch
+	// requests don't succeed
+	KeyPerspectives KeyPerspectives `yaml:"key_perspectives"`
+
+	// Should we prefer direct key fetches over perspective ones?
+	PreferDirectFetch bool `yaml:"prefer_direct_fetch"`
+}
+
+func (c *SigningKeyServer) Defaults() {
+	c.InternalAPI.Listen = "http://localhost:7780"
+	c.InternalAPI.Connect = "http://localhost:7780"
+	c.Database.Defaults()
+	c.Database.ConnectionString = "file:signingkeyserver.db"
+}
+
+func (c *SigningKeyServer) Verify(configErrs *ConfigErrors, isMonolith bool) {
+	checkURL(configErrs, "signing_key_server.internal_api.listen", string(c.InternalAPI.Listen))
+	checkURL(configErrs, "signing_key_server.internal_api.bind", string(c.InternalAPI.Connect))
+	checkNotEmpty(configErrs, "signing_key_server.database.connection_string", string(c.Database.ConnectionString))
+}
+
+// KeyPerspectives are used to configure perspective key servers for
+// retrieving server keys.
+type KeyPerspectives []KeyPerspective
+
+type KeyPerspective struct {
+	// The server name of the perspective key server
+	ServerName gomatrixserverlib.ServerName `yaml:"server_name"`
+	// Server keys for the perspective user, used to verify the
+	// keys have been signed by the perspective server
+	Keys []KeyPerspectiveTrustKey `yaml:"keys"`
+}
+
+type KeyPerspectiveTrustKey struct {
+	// The key ID, e.g. ed25519:auto
+	KeyID gomatrixserverlib.KeyID `yaml:"key_id"`
+	// The public key in base64 unpadded format
+	PublicKey string `yaml:"public_key"`
+}
diff --git a/setup/config/config_syncapi.go b/setup/config/config_syncapi.go
new file mode 100644
index 00000000..fc08f738
--- /dev/null
+++ b/setup/config/config_syncapi.go
@@ -0,0 +1,29 @@
+package config
+
+type SyncAPI struct {
+	Matrix *Global `yaml:"-"`
+
+	InternalAPI InternalAPIOptions `yaml:"internal_api"`
+	ExternalAPI ExternalAPIOptions `yaml:"external_api"`
+
+	Database DatabaseOptions `yaml:"database"`
+
+	RealIPHeader string `yaml:"real_ip_header"`
+}
+
+func (c *SyncAPI) Defaults() {
+	c.InternalAPI.Listen = "http://localhost:7773"
+	c.InternalAPI.Connect = "http://localhost:7773"
+	c.ExternalAPI.Listen = "http://localhost:8073"
+	c.Database.Defaults()
+	c.Database.ConnectionString = "file:syncapi.db"
+}
+
+func (c *SyncAPI) Verify(configErrs *ConfigErrors, isMonolith bool) {
+	checkURL(configErrs, "sync_api.internal_api.listen", string(c.InternalAPI.Listen))
+	checkURL(configErrs, "sync_api.internal_api.bind", string(c.InternalAPI.Connect))
+	if !isMonolith {
+		checkURL(configErrs, "sync_api.external_api.listen", string(c.ExternalAPI.Listen))
+	}
+	checkNotEmpty(configErrs, "sync_api.database", string(c.Database.ConnectionString))
+}
diff --git a/setup/config/config_test.go b/setup/config/config_test.go
new file mode 100644
index 00000000..4107b684
--- /dev/null
+++ b/setup/config/config_test.go
@@ -0,0 +1,285 @@
+// Copyright 2017 Vector Creations Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package config
+
+import (
+	"fmt"
+	"testing"
+)
+
+func TestLoadConfigRelative(t *testing.T) {
+	_, err := loadConfig("/my/config/dir", []byte(testConfig),
+		mockReadFile{
+			"/my/config/dir/matrix_key.pem": testKey,
+			"/my/config/dir/tls_cert.pem":   testCert,
+		}.readFile,
+		false,
+	)
+	if err != nil {
+		t.Error("failed to load config:", err)
+	}
+}
+
+const testConfig = `
+version: 1
+global:
+  server_name: localhost
+  private_key: matrix_key.pem
+  key_id: ed25519:auto
+  key_validity_period: 168h0m0s
+  trusted_third_party_id_servers:
+  - matrix.org
+  - vector.im
+  kafka:
+    addresses:
+    - localhost:2181
+    topic_prefix: Dendrite
+    use_naffka: true
+    naffka_database:
+      connection_string: file:naffka.db
+      max_open_conns: 100
+      max_idle_conns: 2
+      conn_max_lifetime: -1
+  metrics:
+    enabled: false
+    basic_auth:
+      username: metrics
+      password: metrics
+app_service_api:
+  internal_api:
+    listen: http://localhost:7777
+    connect: http://localhost:7777
+  database:
+    connection_string: file:appservice.db
+    max_open_conns: 100
+    max_idle_conns: 2
+    conn_max_lifetime: -1
+  config_files: []
+client_api:
+  internal_api:
+    listen: http://localhost:7771
+    connect: http://localhost:7771
+  external_api:
+    listen: http://[::]:8071
+  registration_disabled: false
+  registration_shared_secret: ""
+  enable_registration_captcha: false
+  recaptcha_public_key: ""
+  recaptcha_private_key: ""
+  recaptcha_bypass_secret: ""
+  recaptcha_siteverify_api: ""
+  turn:
+    turn_user_lifetime: ""
+    turn_uris: []
+    turn_shared_secret: ""
+    turn_username: ""
+    turn_password: ""
+current_state_server:
+  internal_api:
+    listen: http://localhost:7782
+    connect: http://localhost:7782
+  database:
+    connection_string: file:currentstate.db
+    max_open_conns: 100
+    max_idle_conns: 2
+    conn_max_lifetime: -1
+edu_server:
+  internal_api:
+    listen: http://localhost:7778
+    connect: http://localhost:7778
+federation_api:
+  internal_api:
+    listen: http://localhost:7772
+    connect: http://localhost:7772
+  external_api:
+    listen: http://[::]:8072
+  federation_certificates: []
+federation_sender:
+  internal_api:
+    listen: http://localhost:7775
+    connect: http://localhost:7775
+  database:
+    connection_string: file:federationsender.db
+    max_open_conns: 100
+    max_idle_conns: 2
+    conn_max_lifetime: -1
+  send_max_retries: 16
+  disable_tls_validation: false
+  proxy_outbound:
+    enabled: false
+    protocol: http
+    host: localhost
+    port: 8080
+key_server:
+  internal_api:
+    listen: http://localhost:7779
+    connect: http://localhost:7779
+  database:
+    connection_string: file:keyserver.db
+    max_open_conns: 100
+    max_idle_conns: 2
+    conn_max_lifetime: -1
+media_api:
+  internal_api:
+    listen: http://localhost:7774
+    connect: http://localhost:7774
+  external_api:
+    listen: http://[::]:8074
+  database:
+    connection_string: file:mediaapi.db
+    max_open_conns: 100
+    max_idle_conns: 2
+    conn_max_lifetime: -1
+  base_path: ./media_store
+  max_file_size_bytes: 10485760
+  dynamic_thumbnails: false
+  max_thumbnail_generators: 10
+  thumbnail_sizes:
+  - width: 32
+    height: 32
+    method: crop
+  - width: 96
+    height: 96
+    method: crop
+  - width: 640
+    height: 480
+    method: scale
+room_server:
+  internal_api:
+    listen: http://localhost:7770
+    connect: http://localhost:7770
+  database:
+    connection_string: file:roomserver.db
+    max_open_conns: 100
+    max_idle_conns: 2
+    conn_max_lifetime: -1
+server_key_api:
+  internal_api:
+    listen: http://localhost:7780
+    connect: http://localhost:7780
+  database:
+    connection_string: file:serverkeyapi.db
+    max_open_conns: 100
+    max_idle_conns: 2
+    conn_max_lifetime: -1
+  key_perspectives:
+  - server_name: matrix.org
+    keys:
+    - key_id: ed25519:auto
+      public_key: Noi6WqcDj0QmPxCNQqgezwTlBKrfqehY1u2FyWP9uYw
+    - key_id: ed25519:a_RXGa
+      public_key: l8Hft5qXKn1vfHrg3p4+W8gELQVo8N13JkluMfmn2sQ
+sync_api:
+  internal_api:
+    listen: http://localhost:7773
+    connect: http://localhost:7773
+  database:
+    connection_string: file:syncapi.db
+    max_open_conns: 100
+    max_idle_conns: 2
+    conn_max_lifetime: -1
+user_api:
+  internal_api:
+    listen: http://localhost:7781
+    connect: http://localhost:7781
+  account_database:
+    connection_string: file:userapi_accounts.db
+    max_open_conns: 100
+    max_idle_conns: 2
+    conn_max_lifetime: -1
+  device_database:
+    connection_string: file:userapi_devices.db
+    max_open_conns: 100
+    max_idle_conns: 2
+    conn_max_lifetime: -1
+tracing:
+  enabled: false
+  jaeger:
+    serviceName: ""
+    disabled: false
+    rpc_metrics: false
+    tags: []
+    sampler: null
+    reporter: null
+    headers: null
+    baggage_restrictions: null
+    throttler: null
+logging:
+- type: file
+  level: info
+  params:
+    path: /var/log/dendrite
+`
+
+type mockReadFile map[string]string
+
+func (m mockReadFile) readFile(path string) ([]byte, error) {
+	data, ok := m[path]
+	if !ok {
+		return nil, fmt.Errorf("no such file %q", path)
+	}
+	return []byte(data), nil
+}
+
+func TestReadKey(t *testing.T) {
+	keyID, _, err := readKeyPEM("path/to/key", []byte(testKey), true)
+	if err != nil {
+		t.Error("failed to load private key:", err)
+	}
+	wantKeyID := testKeyID
+	if wantKeyID != string(keyID) {
+		t.Errorf("wanted key ID to be %q, got %q", wantKeyID, keyID)
+	}
+}
+
+const testKeyID = "ed25519:c8NsuQ"
+
+const testKey = `
+-----BEGIN MATRIX PRIVATE KEY-----
+Key-ID: ` + testKeyID + `
+7KRZiZ2sTyRR8uqqUjRwczuwRXXkUMYIUHq4Mc3t4bE=
+-----END MATRIX PRIVATE KEY-----
+`
+
+const testCert = `
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
+`
diff --git a/setup/config/config_userapi.go b/setup/config/config_userapi.go
new file mode 100644
index 00000000..2cbd8a45
--- /dev/null
+++ b/setup/config/config_userapi.go
@@ -0,0 +1,30 @@
+package config
+
+type UserAPI struct {
+	Matrix *Global `yaml:"-"`
+
+	InternalAPI InternalAPIOptions `yaml:"internal_api"`
+
+	// The Account database stores the login details and account information
+	// for local users. It is accessed by the UserAPI.
+	AccountDatabase DatabaseOptions `yaml:"account_database"`
+	// The Device database stores session information for the devices of logged
+	// in local users. It is accessed by the UserAPI.
+	DeviceDatabase DatabaseOptions `yaml:"device_database"`
+}
+
+func (c *UserAPI) Defaults() {
+	c.InternalAPI.Listen = "http://localhost:7781"
+	c.InternalAPI.Connect = "http://localhost:7781"
+	c.AccountDatabase.Defaults()
+	c.DeviceDatabase.Defaults()
+	c.AccountDatabase.ConnectionString = "file:userapi_accounts.db"
+	c.DeviceDatabase.ConnectionString = "file:userapi_devices.db"
+}
+
+func (c *UserAPI) Verify(configErrs *ConfigErrors, isMonolith bool) {
+	checkURL(configErrs, "user_api.internal_api.listen", string(c.InternalAPI.Listen))
+	checkURL(configErrs, "user_api.internal_api.connect", string(c.InternalAPI.Connect))
+	checkNotEmpty(configErrs, "user_api.account_database.connection_string", string(c.AccountDatabase.ConnectionString))
+	checkNotEmpty(configErrs, "user_api.device_database.connection_string", string(c.DeviceDatabase.ConnectionString))
+}