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Merge pull request #608 from kradalby/config-rework

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This commit is contained in:
Kristoffer Dalby 2022-06-05 20:18:20 +02:00 committed by GitHub
commit b0acbed329
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GPG key ID: 4AEE18F83AFDEB23
9 changed files with 563 additions and 513 deletions
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111
app.go
View file

@ -6,10 +6,8 @@ import (
"errors"
"fmt"
"io"
"io/fs"
"net"
"net/http"
"net/url"
"os"
"os/signal"
"sort"
@ -42,7 +40,6 @@ import (
"google.golang.org/grpc/reflection"
"google.golang.org/grpc/status"
"gorm.io/gorm"
"inet.af/netaddr"
"tailscale.com/tailcfg"
"tailscale.com/types/dnstype"
"tailscale.com/types/key"
@ -72,95 +69,9 @@ const (
EnforcedClientAuth = "enforced"
)
// Config contains the initial Headscale configuration.
type Config struct {
ServerURL string
Addr string
MetricsAddr string
GRPCAddr string
GRPCAllowInsecure bool
EphemeralNodeInactivityTimeout time.Duration
IPPrefixes []netaddr.IPPrefix
PrivateKeyPath string
BaseDomain string
DERP DERPConfig
DBtype string
DBpath string
DBhost string
DBport int
DBname string
DBuser string
DBpass string
TLSLetsEncryptListen string
TLSLetsEncryptHostname string
TLSLetsEncryptCacheDir string
TLSLetsEncryptChallengeType string
TLSCertPath string
TLSKeyPath string
TLSClientAuthMode tls.ClientAuthType
ACMEURL string
ACMEEmail string
DNSConfig *tailcfg.DNSConfig
UnixSocket string
UnixSocketPermission fs.FileMode
OIDC OIDCConfig
LogTail LogTailConfig
CLI CLIConfig
ACL ACLConfig
}
type OIDCConfig struct {
Issuer string
ClientID string
ClientSecret string
Scope []string
ExtraParams map[string]string
AllowedDomains []string
AllowedUsers []string
StripEmaildomain bool
}
type DERPConfig struct {
ServerEnabled bool
ServerRegionID int
ServerRegionCode string
ServerRegionName string
STUNAddr string
URLs []url.URL
Paths []string
AutoUpdate bool
UpdateFrequency time.Duration
}
type LogTailConfig struct {
Enabled bool
}
type CLIConfig struct {
Address string
APIKey string
Timeout time.Duration
Insecure bool
}
type ACLConfig struct {
PolicyPath string
}
// Headscale represents the base app of the service.
type Headscale struct {
cfg Config
cfg *Config
db *gorm.DB
dbString string
dbType string
@ -204,7 +115,7 @@ func LookupTLSClientAuthMode(mode string) (tls.ClientAuthType, bool) {
}
}
func NewHeadscale(cfg Config) (*Headscale, error) {
func NewHeadscale(cfg *Config) (*Headscale, error) {
privKey, err := readOrCreatePrivateKey(cfg.PrivateKeyPath)
if err != nil {
return nil, fmt.Errorf("failed to read or create private key: %w", err)
@ -778,7 +689,7 @@ func (h *Headscale) Serve() error {
func (h *Headscale) getTLSSettings() (*tls.Config, error) {
var err error
if h.cfg.TLSLetsEncryptHostname != "" {
if h.cfg.TLS.LetsEncrypt.Hostname != "" {
if !strings.HasPrefix(h.cfg.ServerURL, "https://") {
log.Warn().
Msg("Listening with TLS but ServerURL does not start with https://")
@ -786,15 +697,15 @@ func (h *Headscale) getTLSSettings() (*tls.Config, error) {
certManager := autocert.Manager{
Prompt: autocert.AcceptTOS,
HostPolicy: autocert.HostWhitelist(h.cfg.TLSLetsEncryptHostname),
Cache: autocert.DirCache(h.cfg.TLSLetsEncryptCacheDir),
HostPolicy: autocert.HostWhitelist(h.cfg.TLS.LetsEncrypt.Hostname),
Cache: autocert.DirCache(h.cfg.TLS.LetsEncrypt.CacheDir),
Client: &acme.Client{
DirectoryURL: h.cfg.ACMEURL,
},
Email: h.cfg.ACMEEmail,
}
switch h.cfg.TLSLetsEncryptChallengeType {
switch h.cfg.TLS.LetsEncrypt.ChallengeType {
case "TLS-ALPN-01":
// Configuration via autocert with TLS-ALPN-01 (https://tools.ietf.org/html/rfc8737)
// The RFC requires that the validation is done on port 443; in other words, headscale
@ -808,7 +719,7 @@ func (h *Headscale) getTLSSettings() (*tls.Config, error) {
go func() {
log.Fatal().
Caller().
Err(http.ListenAndServe(h.cfg.TLSLetsEncryptListen, certManager.HTTPHandler(http.HandlerFunc(h.redirect)))).
Err(http.ListenAndServe(h.cfg.TLS.LetsEncrypt.Listen, certManager.HTTPHandler(http.HandlerFunc(h.redirect)))).
Msg("failed to set up a HTTP server")
}()
@ -817,7 +728,7 @@ func (h *Headscale) getTLSSettings() (*tls.Config, error) {
default:
return nil, errUnsupportedLetsEncryptChallengeType
}
} else if h.cfg.TLSCertPath == "" {
} else if h.cfg.TLS.CertPath == "" {
if !strings.HasPrefix(h.cfg.ServerURL, "http://") {
log.Warn().Msg("Listening without TLS but ServerURL does not start with http://")
}
@ -830,16 +741,16 @@ func (h *Headscale) getTLSSettings() (*tls.Config, error) {
log.Info().Msg(fmt.Sprintf(
"Client authentication (mTLS) is \"%s\". See the docs to learn about configuring this setting.",
h.cfg.TLSClientAuthMode))
h.cfg.TLS.ClientAuthMode))
tlsConfig := &tls.Config{
ClientAuth: h.cfg.TLSClientAuthMode,
ClientAuth: h.cfg.TLS.ClientAuthMode,
NextProtos: []string{"http/1.1"},
Certificates: make([]tls.Certificate, 1),
MinVersion: tls.VersionTLS12,
}
tlsConfig.Certificates[0], err = tls.LoadX509KeyPair(h.cfg.TLSCertPath, h.cfg.TLSKeyPath)
tlsConfig.Certificates[0], err = tls.LoadX509KeyPair(h.cfg.TLS.CertPath, h.cfg.TLS.KeyPath)
return tlsConfig, err
}

2
app_test.go
View file

@ -46,7 +46,7 @@ func (s *Suite) ResetDB(c *check.C) {
}
app = Headscale{
cfg: cfg,
cfg: &cfg,
dbType: "sqlite3",
dbString: tmpDir + "/headscale_test.db",
}

4
cmd/headscale/cli/server.go
View file

@ -16,12 +16,12 @@ var serveCmd = &cobra.Command{
return nil
},
Run: func(cmd *cobra.Command, args []string) {
h, err := getHeadscaleApp()
app, err := getHeadscaleApp()
if err != nil {
log.Fatal().Caller().Err(err).Msg("Error initializing")
}
err = h.Serve()
err = app.Serve()
if err != nil {
log.Fatal().Caller().Err(err).Msg("Error starting server")
}

399
cmd/headscale/cli/utils.go
View file

@ -4,17 +4,11 @@ import (
"context"
"crypto/tls"
"encoding/json"
"errors"
"fmt"
"io/fs"
"net/url"
"os"
"reflect"
"strconv"
"strings"
"time"
"github.com/coreos/go-oidc/v3/oidc"
"github.com/juanfont/headscale"
v1 "github.com/juanfont/headscale/gen/go/headscale/v1"
"github.com/rs/zerolog/log"
@ -23,380 +17,18 @@ import (
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/credentials/insecure"
"gopkg.in/yaml.v2"
"inet.af/netaddr"
"tailscale.com/tailcfg"
"tailscale.com/types/dnstype"
)
const (
PermissionFallback = 0o700
HeadscaleDateTimeFormat = "2006-01-02 15:04:05"
)
func LoadConfig(path string) error {
viper.SetConfigName("config")
if path == "" {
viper.AddConfigPath("/etc/headscale/")
viper.AddConfigPath("$HOME/.headscale")
viper.AddConfigPath(".")
} else {
// For testing
viper.AddConfigPath(path)
}
viper.SetEnvPrefix("headscale")
viper.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
viper.AutomaticEnv()
viper.SetDefault("tls_letsencrypt_cache_dir", "/var/www/.cache")
viper.SetDefault("tls_letsencrypt_challenge_type", "HTTP-01")
viper.SetDefault("tls_client_auth_mode", "relaxed")
viper.SetDefault("log_level", "info")
viper.SetDefault("dns_config", nil)
viper.SetDefault("derp.server.enabled", false)
viper.SetDefault("derp.server.stun.enabled", true)
viper.SetDefault("unix_socket", "/var/run/headscale.sock")
viper.SetDefault("unix_socket_permission", "0o770")
viper.SetDefault("grpc_listen_addr", ":50443")
viper.SetDefault("grpc_allow_insecure", false)
viper.SetDefault("cli.timeout", "5s")
viper.SetDefault("cli.insecure", false)
viper.SetDefault("oidc.scope", []string{oidc.ScopeOpenID, "profile", "email"})
viper.SetDefault("oidc.strip_email_domain", true)
viper.SetDefault("logtail.enabled", false)
if err := viper.ReadInConfig(); err != nil {
return fmt.Errorf("fatal error reading config file: %w", err)
}
// Collect any validation errors and return them all at once
var errorText string
if (viper.GetString("tls_letsencrypt_hostname") != "") &&
((viper.GetString("tls_cert_path") != "") || (viper.GetString("tls_key_path") != "")) {
errorText += "Fatal config error: set either tls_letsencrypt_hostname or tls_cert_path/tls_key_path, not both\n"
}
if (viper.GetString("tls_letsencrypt_hostname") != "") &&
(viper.GetString("tls_letsencrypt_challenge_type") == "TLS-ALPN-01") &&
(!strings.HasSuffix(viper.GetString("listen_addr"), ":443")) {
// this is only a warning because there could be something sitting in front of headscale that redirects the traffic (e.g. an iptables rule)
log.Warn().
Msg("Warning: when using tls_letsencrypt_hostname with TLS-ALPN-01 as challenge type, headscale must be reachable on port 443, i.e. listen_addr should probably end in :443")
}
if (viper.GetString("tls_letsencrypt_challenge_type") != "HTTP-01") &&
(viper.GetString("tls_letsencrypt_challenge_type") != "TLS-ALPN-01") {
errorText += "Fatal config error: the only supported values for tls_letsencrypt_challenge_type are HTTP-01 and TLS-ALPN-01\n"
}
if !strings.HasPrefix(viper.GetString("server_url"), "http://") &&
!strings.HasPrefix(viper.GetString("server_url"), "https://") {
errorText += "Fatal config error: server_url must start with https:// or http://\n"
}
_, authModeValid := headscale.LookupTLSClientAuthMode(
viper.GetString("tls_client_auth_mode"),
)
if !authModeValid {
errorText += fmt.Sprintf(
"Invalid tls_client_auth_mode supplied: %s. Accepted values: %s, %s, %s.",
viper.GetString("tls_client_auth_mode"),
headscale.DisabledClientAuth,
headscale.RelaxedClientAuth,
headscale.EnforcedClientAuth)
}
if errorText != "" {
//nolint
return errors.New(strings.TrimSuffix(errorText, "\n"))
} else {
return nil
}
}
func GetDERPConfig() headscale.DERPConfig {
serverEnabled := viper.GetBool("derp.server.enabled")
serverRegionID := viper.GetInt("derp.server.region_id")
serverRegionCode := viper.GetString("derp.server.region_code")
serverRegionName := viper.GetString("derp.server.region_name")
stunAddr := viper.GetString("derp.server.stun_listen_addr")
if serverEnabled && stunAddr == "" {
log.Fatal().
Msg("derp.server.stun_listen_addr must be set if derp.server.enabled is true")
}
urlStrs := viper.GetStringSlice("derp.urls")
urls := make([]url.URL, len(urlStrs))
for index, urlStr := range urlStrs {
urlAddr, err := url.Parse(urlStr)
if err != nil {
log.Error().
Str("url", urlStr).
Err(err).
Msg("Failed to parse url, ignoring...")
}
urls[index] = *urlAddr
}
paths := viper.GetStringSlice("derp.paths")
autoUpdate := viper.GetBool("derp.auto_update_enabled")
updateFrequency := viper.GetDuration("derp.update_frequency")
return headscale.DERPConfig{
ServerEnabled: serverEnabled,
ServerRegionID: serverRegionID,
ServerRegionCode: serverRegionCode,
ServerRegionName: serverRegionName,
STUNAddr: stunAddr,
URLs: urls,
Paths: paths,
AutoUpdate: autoUpdate,
UpdateFrequency: updateFrequency,
}
}
func GetLogTailConfig() headscale.LogTailConfig {
enabled := viper.GetBool("logtail.enabled")
return headscale.LogTailConfig{
Enabled: enabled,
}
}
func GetACLConfig() headscale.ACLConfig {
policyPath := viper.GetString("acl_policy_path")
return headscale.ACLConfig{
PolicyPath: policyPath,
}
}
func GetDNSConfig() (*tailcfg.DNSConfig, string) {
if viper.IsSet("dns_config") {
dnsConfig := &tailcfg.DNSConfig{}
if viper.IsSet("dns_config.nameservers") {
nameserversStr := viper.GetStringSlice("dns_config.nameservers")
nameservers := make([]netaddr.IP, len(nameserversStr))
resolvers := make([]dnstype.Resolver, len(nameserversStr))
for index, nameserverStr := range nameserversStr {
nameserver, err := netaddr.ParseIP(nameserverStr)
if err != nil {
log.Error().
Str("func", "getDNSConfig").
Err(err).
Msgf("Could not parse nameserver IP: %s", nameserverStr)
}
nameservers[index] = nameserver
resolvers[index] = dnstype.Resolver{
Addr: nameserver.String(),
}
}
dnsConfig.Nameservers = nameservers
dnsConfig.Resolvers = resolvers
}
if viper.IsSet("dns_config.restricted_nameservers") {
if len(dnsConfig.Nameservers) > 0 {
dnsConfig.Routes = make(map[string][]dnstype.Resolver)
restrictedDNS := viper.GetStringMapStringSlice(
"dns_config.restricted_nameservers",
)
for domain, restrictedNameservers := range restrictedDNS {
restrictedResolvers := make(
[]dnstype.Resolver,
len(restrictedNameservers),
)
for index, nameserverStr := range restrictedNameservers {
nameserver, err := netaddr.ParseIP(nameserverStr)
if err != nil {
log.Error().
Str("func", "getDNSConfig").
Err(err).
Msgf("Could not parse restricted nameserver IP: %s", nameserverStr)
}
restrictedResolvers[index] = dnstype.Resolver{
Addr: nameserver.String(),
}
}
dnsConfig.Routes[domain] = restrictedResolvers
}
} else {
log.Warn().
Msg("Warning: dns_config.restricted_nameservers is set, but no nameservers are configured. Ignoring restricted_nameservers.")
}
}
if viper.IsSet("dns_config.domains") {
dnsConfig.Domains = viper.GetStringSlice("dns_config.domains")
}
if viper.IsSet("dns_config.magic_dns") {
magicDNS := viper.GetBool("dns_config.magic_dns")
if len(dnsConfig.Nameservers) > 0 {
dnsConfig.Proxied = magicDNS
} else if magicDNS {
log.Warn().
Msg("Warning: dns_config.magic_dns is set, but no nameservers are configured. Ignoring magic_dns.")
}
}
var baseDomain string
if viper.IsSet("dns_config.base_domain") {
baseDomain = viper.GetString("dns_config.base_domain")
} else {
baseDomain = "headscale.net" // does not really matter when MagicDNS is not enabled
}
return dnsConfig, baseDomain
}
return nil, ""
}
func GetHeadscaleConfig() headscale.Config {
dnsConfig, baseDomain := GetDNSConfig()
derpConfig := GetDERPConfig()
logConfig := GetLogTailConfig()
configuredPrefixes := viper.GetStringSlice("ip_prefixes")
parsedPrefixes := make([]netaddr.IPPrefix, 0, len(configuredPrefixes)+1)
legacyPrefixField := viper.GetString("ip_prefix")
if len(legacyPrefixField) > 0 {
log.
Warn().
Msgf(
"%s, %s",
"use of 'ip_prefix' for configuration is deprecated",
"please see 'ip_prefixes' in the shipped example.",
)
legacyPrefix, err := netaddr.ParseIPPrefix(legacyPrefixField)
if err != nil {
panic(fmt.Errorf("failed to parse ip_prefix: %w", err))
}
parsedPrefixes = append(parsedPrefixes, legacyPrefix)
}
for i, prefixInConfig := range configuredPrefixes {
prefix, err := netaddr.ParseIPPrefix(prefixInConfig)
if err != nil {
panic(fmt.Errorf("failed to parse ip_prefixes[%d]: %w", i, err))
}
parsedPrefixes = append(parsedPrefixes, prefix)
}
prefixes := make([]netaddr.IPPrefix, 0, len(parsedPrefixes))
{
// dedup
normalizedPrefixes := make(map[string]int, len(parsedPrefixes))
for i, p := range parsedPrefixes {
normalized, _ := p.Range().Prefix()
normalizedPrefixes[normalized.String()] = i
}
// convert back to list
for _, i := range normalizedPrefixes {
prefixes = append(prefixes, parsedPrefixes[i])
}
}
if len(prefixes) < 1 {
prefixes = append(prefixes, netaddr.MustParseIPPrefix("100.64.0.0/10"))
log.Warn().
Msgf("'ip_prefixes' not configured, falling back to default: %v", prefixes)
}
tlsClientAuthMode, _ := headscale.LookupTLSClientAuthMode(
viper.GetString("tls_client_auth_mode"),
)
return headscale.Config{
ServerURL: viper.GetString("server_url"),
Addr: viper.GetString("listen_addr"),
MetricsAddr: viper.GetString("metrics_listen_addr"),
GRPCAddr: viper.GetString("grpc_listen_addr"),
GRPCAllowInsecure: viper.GetBool("grpc_allow_insecure"),
IPPrefixes: prefixes,
PrivateKeyPath: headscale.AbsolutePathFromConfigPath(viper.GetString("private_key_path")),
BaseDomain: baseDomain,
DERP: derpConfig,
EphemeralNodeInactivityTimeout: viper.GetDuration(
"ephemeral_node_inactivity_timeout",
),
DBtype: viper.GetString("db_type"),
DBpath: headscale.AbsolutePathFromConfigPath(viper.GetString("db_path")),
DBhost: viper.GetString("db_host"),
DBport: viper.GetInt("db_port"),
DBname: viper.GetString("db_name"),
DBuser: viper.GetString("db_user"),
DBpass: viper.GetString("db_pass"),
TLSLetsEncryptHostname: viper.GetString("tls_letsencrypt_hostname"),
TLSLetsEncryptListen: viper.GetString("tls_letsencrypt_listen"),
TLSLetsEncryptCacheDir: headscale.AbsolutePathFromConfigPath(
viper.GetString("tls_letsencrypt_cache_dir"),
),
TLSLetsEncryptChallengeType: viper.GetString("tls_letsencrypt_challenge_type"),
TLSCertPath: headscale.AbsolutePathFromConfigPath(viper.GetString("tls_cert_path")),
TLSKeyPath: headscale.AbsolutePathFromConfigPath(viper.GetString("tls_key_path")),
TLSClientAuthMode: tlsClientAuthMode,
DNSConfig: dnsConfig,
ACMEEmail: viper.GetString("acme_email"),
ACMEURL: viper.GetString("acme_url"),
UnixSocket: viper.GetString("unix_socket"),
UnixSocketPermission: GetFileMode("unix_socket_permission"),
OIDC: headscale.OIDCConfig{
Issuer: viper.GetString("oidc.issuer"),
ClientID: viper.GetString("oidc.client_id"),
ClientSecret: viper.GetString("oidc.client_secret"),
Scope: viper.GetStringSlice("oidc.scope"),
ExtraParams: viper.GetStringMapString("oidc.extra_params"),
AllowedDomains: viper.GetStringSlice("oidc.allowed_domains"),
AllowedUsers: viper.GetStringSlice("oidc.allowed_users"),
StripEmaildomain: viper.GetBool("oidc.strip_email_domain"),
},
LogTail: logConfig,
CLI: headscale.CLIConfig{
Address: viper.GetString("cli.address"),
APIKey: viper.GetString("cli.api_key"),
Timeout: viper.GetDuration("cli.timeout"),
Insecure: viper.GetBool("cli.insecure"),
},
ACL: GetACLConfig(),
}
}
func getHeadscaleApp() (*headscale.Headscale, error) {
cfg, err := headscale.GetHeadscaleConfig()
if err != nil {
return nil, fmt.Errorf("failed to load configuration while creating headscale instance: %w", err)
}
// Minimum inactivity time out is keepalive timeout (60s) plus a few seconds
// to avoid races
minInactivityTimeout, _ := time.ParseDuration("65s")
@ -412,8 +44,6 @@ func getHeadscaleApp() (*headscale.Headscale, error) {
return nil, err
}
cfg := GetHeadscaleConfig()
app, err := headscale.NewHeadscale(cfg)
if err != nil {
return nil, err
@ -436,7 +66,13 @@ func getHeadscaleApp() (*headscale.Headscale, error) {
}
func getHeadscaleCLIClient() (context.Context, v1.HeadscaleServiceClient, *grpc.ClientConn, context.CancelFunc) {
cfg := GetHeadscaleConfig()
cfg, err := headscale.GetHeadscaleConfig()
if err != nil {
log.Fatal().
Err(err).
Caller().
Msgf("Failed to load configuration")
}
log.Debug().
Dur("timeout", cfg.CLI.Timeout).
@ -570,17 +206,6 @@ func (tokenAuth) RequireTransportSecurity() bool {
return true
}
func GetFileMode(key string) fs.FileMode {
modeStr := viper.GetString(key)
mode, err := strconv.ParseUint(modeStr, headscale.Base8, headscale.BitSize64)
if err != nil {
return PermissionFallback
}
return fs.FileMode(mode)
}
func contains[T string](ts []T, t T) bool {
for _, v := range ts {
if reflect.DeepEqual(v, t) {

15
cmd/headscale/headscale.go
View file

@ -7,10 +7,10 @@ import (
"time"
"github.com/efekarakus/termcolor"
"github.com/juanfont/headscale"
"github.com/juanfont/headscale/cmd/headscale/cli"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
"github.com/spf13/viper"
"github.com/tcnksm/go-latest"
)
@ -43,19 +43,14 @@ func main() {
NoColor: !colors,
})
if err := cli.LoadConfig(""); err != nil {
cfg, err := headscale.GetHeadscaleConfig()
if err != nil {
log.Fatal().Caller().Err(err)
}
machineOutput := cli.HasMachineOutputFlag()
logLevel := viper.GetString("log_level")
level, err := zerolog.ParseLevel(logLevel)
if err != nil {
zerolog.SetGlobalLevel(zerolog.DebugLevel)
} else {
zerolog.SetGlobalLevel(level)
}
zerolog.SetGlobalLevel(cfg.LogLevel)
// If the user has requested a "machine" readable format,
// then disable login so the output remains valid.
@ -63,7 +58,7 @@ func main() {
zerolog.SetGlobalLevel(zerolog.Disabled)
}
if !viper.GetBool("disable_check_updates") && !machineOutput {
if !cfg.DisableUpdateCheck && !machineOutput {
if (runtime.GOOS == "linux" || runtime.GOOS == "darwin") &&
cli.Version != "dev" {
githubTag := &latest.GithubTag{

14
cmd/headscale/headscale_test.go
View file

@ -8,7 +8,7 @@ import (
"strings"
"testing"
"github.com/juanfont/headscale/cmd/headscale/cli"
"github.com/juanfont/headscale"
"github.com/spf13/viper"
"gopkg.in/check.v1"
)
@ -49,7 +49,7 @@ func (*Suite) TestConfigLoading(c *check.C) {
}
// Load example config, it should load without validation errors
err = cli.LoadConfig(tmpDir)
err = headscale.LoadConfig(tmpDir)
c.Assert(err, check.IsNil)
// Test that config file was interpreted correctly
@ -63,7 +63,7 @@ func (*Suite) TestConfigLoading(c *check.C) {
c.Assert(viper.GetString("tls_letsencrypt_challenge_type"), check.Equals, "HTTP-01")
c.Assert(viper.GetStringSlice("dns_config.nameservers")[0], check.Equals, "1.1.1.1")
c.Assert(
cli.GetFileMode("unix_socket_permission"),
headscale.GetFileMode("unix_socket_permission"),
check.Equals,
fs.FileMode(0o770),
)
@ -92,10 +92,10 @@ func (*Suite) TestDNSConfigLoading(c *check.C) {
}
// Load example config, it should load without validation errors
err = cli.LoadConfig(tmpDir)
err = headscale.LoadConfig(tmpDir)
c.Assert(err, check.IsNil)
dnsConfig, baseDomain := cli.GetDNSConfig()
dnsConfig, baseDomain := headscale.GetDNSConfig()
c.Assert(dnsConfig.Nameservers[0].String(), check.Equals, "1.1.1.1")
c.Assert(dnsConfig.Resolvers[0].Addr, check.Equals, "1.1.1.1")
@ -125,7 +125,7 @@ func (*Suite) TestTLSConfigValidation(c *check.C) {
writeConfig(c, tmpDir, configYaml)
// Check configuration validation errors (1)
err = cli.LoadConfig(tmpDir)
err = headscale.LoadConfig(tmpDir)
c.Assert(err, check.NotNil)
// check.Matches can not handle multiline strings
tmp := strings.ReplaceAll(err.Error(), "\n", "***")
@ -150,6 +150,6 @@ func (*Suite) TestTLSConfigValidation(c *check.C) {
"---\nserver_url: \"http://127.0.0.1:8080\"\ntls_letsencrypt_hostname: \"example.com\"\ntls_letsencrypt_challenge_type: \"TLS-ALPN-01\"",
)
writeConfig(c, tmpDir, configYaml)
err = cli.LoadConfig(tmpDir)
err = headscale.LoadConfig(tmpDir)
c.Assert(err, check.IsNil)
}

504
config.go Normal file
View file

@ -0,0 +1,504 @@
package headscale
import (
"crypto/tls"
"errors"
"fmt"
"io/fs"
"net/url"
"strings"
"time"
"github.com/coreos/go-oidc/v3/oidc"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
"github.com/spf13/viper"
"inet.af/netaddr"
"tailscale.com/tailcfg"
"tailscale.com/types/dnstype"
)
// Config contains the initial Headscale configuration.
type Config struct {
ServerURL string
Addr string
MetricsAddr string
GRPCAddr string
GRPCAllowInsecure bool
EphemeralNodeInactivityTimeout time.Duration
IPPrefixes []netaddr.IPPrefix
PrivateKeyPath string
BaseDomain string
LogLevel zerolog.Level
DisableUpdateCheck bool
DERP DERPConfig
DBtype string
DBpath string
DBhost string
DBport int
DBname string
DBuser string
DBpass string
TLS TLSConfig
ACMEURL string
ACMEEmail string
DNSConfig *tailcfg.DNSConfig
UnixSocket string
UnixSocketPermission fs.FileMode
OIDC OIDCConfig
LogTail LogTailConfig
CLI CLIConfig
ACL ACLConfig
}
type TLSConfig struct {
CertPath string
KeyPath string
ClientAuthMode tls.ClientAuthType
LetsEncrypt LetsEncryptConfig
}
type LetsEncryptConfig struct {
Listen string
Hostname string
CacheDir string
ChallengeType string
}
type OIDCConfig struct {
Issuer string
ClientID string
ClientSecret string
Scope []string
ExtraParams map[string]string
AllowedDomains []string
AllowedUsers []string
StripEmaildomain bool
}
type DERPConfig struct {
ServerEnabled bool
ServerRegionID int
ServerRegionCode string
ServerRegionName string
STUNAddr string
URLs []url.URL
Paths []string
AutoUpdate bool
UpdateFrequency time.Duration
}
type LogTailConfig struct {
Enabled bool
}
type CLIConfig struct {
Address string
APIKey string
Timeout time.Duration
Insecure bool
}
type ACLConfig struct {
PolicyPath string
}
func LoadConfig(path string) error {
viper.SetConfigName("config")
if path == "" {
viper.AddConfigPath("/etc/headscale/")
viper.AddConfigPath("$HOME/.headscale")
viper.AddConfigPath(".")
} else {
// For testing
viper.AddConfigPath(path)
}
viper.SetEnvPrefix("headscale")
viper.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
viper.AutomaticEnv()
viper.SetDefault("tls_letsencrypt_cache_dir", "/var/www/.cache")
viper.SetDefault("tls_letsencrypt_challenge_type", "HTTP-01")
viper.SetDefault("tls_client_auth_mode", "relaxed")
viper.SetDefault("log_level", "info")
viper.SetDefault("dns_config", nil)
viper.SetDefault("derp.server.enabled", false)
viper.SetDefault("derp.server.stun.enabled", true)
viper.SetDefault("unix_socket", "/var/run/headscale.sock")
viper.SetDefault("unix_socket_permission", "0o770")
viper.SetDefault("grpc_listen_addr", ":50443")
viper.SetDefault("grpc_allow_insecure", false)
viper.SetDefault("cli.timeout", "5s")
viper.SetDefault("cli.insecure", false)
viper.SetDefault("oidc.scope", []string{oidc.ScopeOpenID, "profile", "email"})
viper.SetDefault("oidc.strip_email_domain", true)
viper.SetDefault("logtail.enabled", false)
if err := viper.ReadInConfig(); err != nil {
return fmt.Errorf("fatal error reading config file: %w", err)
}
// Collect any validation errors and return them all at once
var errorText string
if (viper.GetString("tls_letsencrypt_hostname") != "") &&
((viper.GetString("tls_cert_path") != "") || (viper.GetString("tls_key_path") != "")) {
errorText += "Fatal config error: set either tls_letsencrypt_hostname or tls_cert_path/tls_key_path, not both\n"
}
if (viper.GetString("tls_letsencrypt_hostname") != "") &&
(viper.GetString("tls_letsencrypt_challenge_type") == "TLS-ALPN-01") &&
(!strings.HasSuffix(viper.GetString("listen_addr"), ":443")) {
// this is only a warning because there could be something sitting in front of headscale that redirects the traffic (e.g. an iptables rule)
log.Warn().
Msg("Warning: when using tls_letsencrypt_hostname with TLS-ALPN-01 as challenge type, headscale must be reachable on port 443, i.e. listen_addr should probably end in :443")
}
if (viper.GetString("tls_letsencrypt_challenge_type") != "HTTP-01") &&
(viper.GetString("tls_letsencrypt_challenge_type") != "TLS-ALPN-01") {
errorText += "Fatal config error: the only supported values for tls_letsencrypt_challenge_type are HTTP-01 and TLS-ALPN-01\n"
}
if !strings.HasPrefix(viper.GetString("server_url"), "http://") &&
!strings.HasPrefix(viper.GetString("server_url"), "https://") {
errorText += "Fatal config error: server_url must start with https:// or http://\n"
}
_, authModeValid := LookupTLSClientAuthMode(
viper.GetString("tls_client_auth_mode"),
)
if !authModeValid {
errorText += fmt.Sprintf(
"Invalid tls_client_auth_mode supplied: %s. Accepted values: %s, %s, %s.",
viper.GetString("tls_client_auth_mode"),
DisabledClientAuth,
RelaxedClientAuth,
EnforcedClientAuth)
}
if errorText != "" {
//nolint
return errors.New(strings.TrimSuffix(errorText, "\n"))
} else {
return nil
}
}
func GetTLSConfig() TLSConfig {
tlsClientAuthMode, _ := LookupTLSClientAuthMode(
viper.GetString("tls_client_auth_mode"),
)
return TLSConfig{
LetsEncrypt: LetsEncryptConfig{
Hostname: viper.GetString("tls_letsencrypt_hostname"),
Listen: viper.GetString("tls_letsencrypt_listen"),
CacheDir: AbsolutePathFromConfigPath(
viper.GetString("tls_letsencrypt_cache_dir"),
),
ChallengeType: viper.GetString("tls_letsencrypt_challenge_type"),
},
CertPath: AbsolutePathFromConfigPath(
viper.GetString("tls_cert_path"),
),
KeyPath: AbsolutePathFromConfigPath(
viper.GetString("tls_key_path"),
),
ClientAuthMode: tlsClientAuthMode,
}
}
func GetDERPConfig() DERPConfig {
serverEnabled := viper.GetBool("derp.server.enabled")
serverRegionID := viper.GetInt("derp.server.region_id")
serverRegionCode := viper.GetString("derp.server.region_code")
serverRegionName := viper.GetString("derp.server.region_name")
stunAddr := viper.GetString("derp.server.stun_listen_addr")
if serverEnabled && stunAddr == "" {
log.Fatal().
Msg("derp.server.stun_listen_addr must be set if derp.server.enabled is true")
}
urlStrs := viper.GetStringSlice("derp.urls")
urls := make([]url.URL, len(urlStrs))
for index, urlStr := range urlStrs {
urlAddr, err := url.Parse(urlStr)
if err != nil {
log.Error().
Str("url", urlStr).
Err(err).
Msg("Failed to parse url, ignoring...")
}
urls[index] = *urlAddr
}
paths := viper.GetStringSlice("derp.paths")
autoUpdate := viper.GetBool("derp.auto_update_enabled")
updateFrequency := viper.GetDuration("derp.update_frequency")
return DERPConfig{
ServerEnabled: serverEnabled,
ServerRegionID: serverRegionID,
ServerRegionCode: serverRegionCode,
ServerRegionName: serverRegionName,
STUNAddr: stunAddr,
URLs: urls,
Paths: paths,
AutoUpdate: autoUpdate,
UpdateFrequency: updateFrequency,
}
}
func GetLogTailConfig() LogTailConfig {
enabled := viper.GetBool("logtail.enabled")
return LogTailConfig{
Enabled: enabled,
}
}
func GetACLConfig() ACLConfig {
policyPath := viper.GetString("acl_policy_path")
return ACLConfig{
PolicyPath: policyPath,
}
}
func GetDNSConfig() (*tailcfg.DNSConfig, string) {
if viper.IsSet("dns_config") {
dnsConfig := &tailcfg.DNSConfig{}
if viper.IsSet("dns_config.nameservers") {
nameserversStr := viper.GetStringSlice("dns_config.nameservers")
nameservers := make([]netaddr.IP, len(nameserversStr))
resolvers := make([]dnstype.Resolver, len(nameserversStr))
for index, nameserverStr := range nameserversStr {
nameserver, err := netaddr.ParseIP(nameserverStr)
if err != nil {
log.Error().
Str("func", "getDNSConfig").
Err(err).
Msgf("Could not parse nameserver IP: %s", nameserverStr)
}
nameservers[index] = nameserver
resolvers[index] = dnstype.Resolver{
Addr: nameserver.String(),
}
}
dnsConfig.Nameservers = nameservers
dnsConfig.Resolvers = resolvers
}
if viper.IsSet("dns_config.restricted_nameservers") {
if len(dnsConfig.Nameservers) > 0 {
dnsConfig.Routes = make(map[string][]dnstype.Resolver)
restrictedDNS := viper.GetStringMapStringSlice(
"dns_config.restricted_nameservers",
)
for domain, restrictedNameservers := range restrictedDNS {
restrictedResolvers := make(
[]dnstype.Resolver,
len(restrictedNameservers),
)
for index, nameserverStr := range restrictedNameservers {
nameserver, err := netaddr.ParseIP(nameserverStr)
if err != nil {
log.Error().
Str("func", "getDNSConfig").
Err(err).
Msgf("Could not parse restricted nameserver IP: %s", nameserverStr)
}
restrictedResolvers[index] = dnstype.Resolver{
Addr: nameserver.String(),
}
}
dnsConfig.Routes[domain] = restrictedResolvers
}
} else {
log.Warn().
Msg("Warning: dns_config.restricted_nameservers is set, but no nameservers are configured. Ignoring restricted_nameservers.")
}
}
if viper.IsSet("dns_config.domains") {
dnsConfig.Domains = viper.GetStringSlice("dns_config.domains")
}
if viper.IsSet("dns_config.magic_dns") {
magicDNS := viper.GetBool("dns_config.magic_dns")
if len(dnsConfig.Nameservers) > 0 {
dnsConfig.Proxied = magicDNS
} else if magicDNS {
log.Warn().
Msg("Warning: dns_config.magic_dns is set, but no nameservers are configured. Ignoring magic_dns.")
}
}
var baseDomain string
if viper.IsSet("dns_config.base_domain") {
baseDomain = viper.GetString("dns_config.base_domain")
} else {
baseDomain = "headscale.net" // does not really matter when MagicDNS is not enabled
}
return dnsConfig, baseDomain
}
return nil, ""
}
func GetHeadscaleConfig() (*Config, error) {
err := LoadConfig("")
if err != nil {
return nil, err
}
dnsConfig, baseDomain := GetDNSConfig()
derpConfig := GetDERPConfig()
logConfig := GetLogTailConfig()
configuredPrefixes := viper.GetStringSlice("ip_prefixes")
parsedPrefixes := make([]netaddr.IPPrefix, 0, len(configuredPrefixes)+1)
logLevelStr := viper.GetString("log_level")
logLevel, err := zerolog.ParseLevel(logLevelStr)
if err != nil {
logLevel = zerolog.DebugLevel
}
legacyPrefixField := viper.GetString("ip_prefix")
if len(legacyPrefixField) > 0 {
log.
Warn().
Msgf(
"%s, %s",
"use of 'ip_prefix' for configuration is deprecated",
"please see 'ip_prefixes' in the shipped example.",
)
legacyPrefix, err := netaddr.ParseIPPrefix(legacyPrefixField)
if err != nil {
panic(fmt.Errorf("failed to parse ip_prefix: %w", err))
}
parsedPrefixes = append(parsedPrefixes, legacyPrefix)
}
for i, prefixInConfig := range configuredPrefixes {
prefix, err := netaddr.ParseIPPrefix(prefixInConfig)
if err != nil {
panic(fmt.Errorf("failed to parse ip_prefixes[%d]: %w", i, err))
}
parsedPrefixes = append(parsedPrefixes, prefix)
}
prefixes := make([]netaddr.IPPrefix, 0, len(parsedPrefixes))
{
// dedup
normalizedPrefixes := make(map[string]int, len(parsedPrefixes))
for i, p := range parsedPrefixes {
normalized, _ := p.Range().Prefix()
normalizedPrefixes[normalized.String()] = i
}
// convert back to list
for _, i := range normalizedPrefixes {
prefixes = append(prefixes, parsedPrefixes[i])
}
}
if len(prefixes) < 1 {
prefixes = append(prefixes, netaddr.MustParseIPPrefix("100.64.0.0/10"))
log.Warn().
Msgf("'ip_prefixes' not configured, falling back to default: %v", prefixes)
}
return &Config{
ServerURL: viper.GetString("server_url"),
Addr: viper.GetString("listen_addr"),
MetricsAddr: viper.GetString("metrics_listen_addr"),
GRPCAddr: viper.GetString("grpc_listen_addr"),
GRPCAllowInsecure: viper.GetBool("grpc_allow_insecure"),
DisableUpdateCheck: viper.GetBool("disable_check_updates"),
LogLevel: logLevel,
IPPrefixes: prefixes,
PrivateKeyPath: AbsolutePathFromConfigPath(
viper.GetString("private_key_path"),
),
BaseDomain: baseDomain,
DERP: derpConfig,
EphemeralNodeInactivityTimeout: viper.GetDuration(
"ephemeral_node_inactivity_timeout",
),
DBtype: viper.GetString("db_type"),
DBpath: AbsolutePathFromConfigPath(viper.GetString("db_path")),
DBhost: viper.GetString("db_host"),
DBport: viper.GetInt("db_port"),
DBname: viper.GetString("db_name"),
DBuser: viper.GetString("db_user"),
DBpass: viper.GetString("db_pass"),
TLS: GetTLSConfig(),
DNSConfig: dnsConfig,
ACMEEmail: viper.GetString("acme_email"),
ACMEURL: viper.GetString("acme_url"),
UnixSocket: viper.GetString("unix_socket"),
UnixSocketPermission: GetFileMode("unix_socket_permission"),
OIDC: OIDCConfig{
Issuer: viper.GetString("oidc.issuer"),
ClientID: viper.GetString("oidc.client_id"),
ClientSecret: viper.GetString("oidc.client_secret"),
Scope: viper.GetStringSlice("oidc.scope"),
ExtraParams: viper.GetStringMapString("oidc.extra_params"),
AllowedDomains: viper.GetStringSlice("oidc.allowed_domains"),
AllowedUsers: viper.GetStringSlice("oidc.allowed_users"),
StripEmaildomain: viper.GetBool("oidc.strip_email_domain"),
},
LogTail: logConfig,
CLI: CLIConfig{
Address: viper.GetString("cli.address"),
APIKey: viper.GetString("cli.api_key"),
Timeout: viper.GetDuration("cli.timeout"),
Insecure: viper.GetBool("cli.insecure"),
},
ACL: GetACLConfig(),
}, nil
}

12
machine_test.go
View file

@ -821,7 +821,7 @@ func TestHeadscale_GenerateGivenName(t *testing.T) {
{
name: "simple machine name generation",
h: &Headscale{
cfg: Config{
cfg: &Config{
OIDC: OIDCConfig{
StripEmaildomain: true,
},
@ -836,7 +836,7 @@ func TestHeadscale_GenerateGivenName(t *testing.T) {
{
name: "machine name with 53 chars",
h: &Headscale{
cfg: Config{
cfg: &Config{
OIDC: OIDCConfig{
StripEmaildomain: true,
},
@ -851,7 +851,7 @@ func TestHeadscale_GenerateGivenName(t *testing.T) {
{
name: "machine name with 60 chars",
h: &Headscale{
cfg: Config{
cfg: &Config{
OIDC: OIDCConfig{
StripEmaildomain: true,
},
@ -866,7 +866,7 @@ func TestHeadscale_GenerateGivenName(t *testing.T) {
{
name: "machine name with 63 chars",
h: &Headscale{
cfg: Config{
cfg: &Config{
OIDC: OIDCConfig{
StripEmaildomain: true,
},
@ -881,7 +881,7 @@ func TestHeadscale_GenerateGivenName(t *testing.T) {
{
name: "machine name with 64 chars",
h: &Headscale{
cfg: Config{
cfg: &Config{
OIDC: OIDCConfig{
StripEmaildomain: true,
},
@ -896,7 +896,7 @@ func TestHeadscale_GenerateGivenName(t *testing.T) {
{
name: "machine name with 73 chars",
h: &Headscale{
cfg: Config{
cfg: &Config{
OIDC: OIDCConfig{
StripEmaildomain: true,
},

15
utils.go
View file

@ -11,10 +11,12 @@ import (
"encoding/base64"
"encoding/json"
"fmt"
"io/fs"
"net"
"os"
"path/filepath"
"reflect"
"strconv"
"strings"
"github.com/rs/zerolog/log"
@ -55,6 +57,8 @@ const (
// privateKey prefix.
privateHexPrefix = "privkey:"
PermissionFallback = 0o700
)
func MachinePublicKeyStripPrefix(machineKey key.MachinePublic) string {
@ -350,3 +354,14 @@ func AbsolutePathFromConfigPath(path string) string {
return path
}
func GetFileMode(key string) fs.FileMode {
modeStr := viper.GetString(key)
mode, err := strconv.ParseUint(modeStr, Base8, BitSize64)
if err != nil {
return PermissionFallback
}
return fs.FileMode(mode)
}