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Better config test (#177) 

* Better config test

Previously, when using the config test option `-test`, we quit fairly
earlier in the process and would not catch a variety of additional
parsing errors (such as lighthouse IP addresses, local_range, the new
check to make sure static hosts are in the certificate's subnet, etc).

* run config test as part of smoke test

* don't need privileges for configtest

Co-authored-by: Nathan Brown <nate@slack-corp.com>
This commit is contained in:
Wade Simmons 2020-04-06 14:35:32 -04:00 committed by GitHub
parent b4f2f7ce4e
commit 7cdbb14a18
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 60 additions and 42 deletions
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4
.github/workflows/smoke/smoke.sh vendored
View File

@ -2,6 +2,10 @@
set -e -x
docker run --name lighthouse1 --rm nebula:smoke -config lighthouse1.yml -test
docker run --name host2 --rm nebula:smoke -config host2.yml -test
docker run --name host3 --rm nebula:smoke -config host3.yml -test
docker run --name lighthouse1 --device /dev/net/tun:/dev/net/tun --cap-add NET_ADMIN --rm nebula:smoke -config lighthouse1.yml &
sleep 1
docker run --name host2 --device /dev/net/tun:/dev/net/tun --cap-add NET_ADMIN --rm nebula:smoke -config host2.yml &

30
main.go
View File

@ -101,14 +101,12 @@ func Main(configPath string, configTest bool, buildVersion string) {
// tun config, listeners, anything modifying the computer should be below
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
if configTest {
os.Exit(0)
}
var tun *Tun
if !configTest {
config.CatchHUP()
// set up our tun dev
tun, err := newTun(
tun, err = newTun(
config.GetString("tun.dev", ""),
tunCidr,
config.GetInt("tun.mtu", DEFAULT_MTU),
@ -119,14 +117,19 @@ func Main(configPath string, configTest bool, buildVersion string) {
if err != nil {
l.WithError(err).Fatal("Failed to get a tun/tap device")
}
}
// set up our UDP listener
udpQueues := config.GetInt("listen.routines", 1)
udpServer, err := NewListener(config.GetString("listen.host", "0.0.0.0"), config.GetInt("listen.port", 0), udpQueues > 1)
var udpServer *udpConn
if !configTest {
udpServer, err = NewListener(config.GetString("listen.host", "0.0.0.0"), config.GetInt("listen.port", 0), udpQueues > 1)
if err != nil {
l.WithError(err).Fatal("Failed to open udp listener")
}
udpServer.reloadConfig(config)
}
// Set up my internal host map
var preferredRanges []*net.IPNet
@ -178,14 +181,14 @@ func Main(configPath string, configTest bool, buildVersion string) {
*/
punchy := NewPunchyFromConfig(config)
if punchy.Punch {
if punchy.Punch && !configTest {
l.Info("UDP hole punching enabled")
go hostMap.Punchy(udpServer)
}
port := config.GetInt("listen.port", 0)
// If port is dynamic, discover it
if port == 0 {
if port == 0 && !configTest {
uPort, err := udpServer.LocalAddr()
if err != nil {
l.WithError(err).Fatal("Failed to get listening port")
@ -306,7 +309,9 @@ func Main(configPath string, configTest bool, buildVersion string) {
l.Fatalf("Unknown cipher: %v", ifConfig.Cipher)
}
ifce, err := NewInterface(ifConfig)
var ifce *Interface
if !configTest {
ifce, err = NewInterface(ifConfig)
if err != nil {
l.WithError(err).Fatal("Failed to initialize interface")
}
@ -315,12 +320,17 @@ func Main(configPath string, configTest bool, buildVersion string) {
go handshakeManager.Run(ifce)
go lightHouse.LhUpdateWorker(ifce)
}
err = startStats(config)
err = startStats(config, configTest)
if err != nil {
l.WithError(err).Fatal("Failed to start stats emitter")
}
if configTest {
os.Exit(0)
}
//TODO: check if we _should_ be emitting stats
go ifce.emitStats(config.GetDuration("stats.interval", time.Second*10))

14
stats.go
View File

@ -14,7 +14,7 @@ import (
"time"
)
func startStats(c *Config) error {
func startStats(c *Config, configTest bool) error {
mType := c.GetString("stats.type", "")
if mType == "" || mType == "none" {
return nil
@ -27,9 +27,9 @@ func startStats(c *Config) error {
switch mType {
case "graphite":
startGraphiteStats(interval, c)
startGraphiteStats(interval, c, configTest)
case "prometheus":
startPrometheusStats(interval, c)
startPrometheusStats(interval, c, configTest)
default:
return fmt.Errorf("stats.type was not understood: %s", mType)
}
@ -43,7 +43,7 @@ func startStats(c *Config) error {
return nil
}
func startGraphiteStats(i time.Duration, c *Config) error {
func startGraphiteStats(i time.Duration, c *Config, configTest bool) error {
proto := c.GetString("stats.protocol", "tcp")
host := c.GetString("stats.host", "")
if host == "" {
@ -57,11 +57,13 @@ func startGraphiteStats(i time.Duration, c *Config) error {
}
l.Infof("Starting graphite. Interval: %s, prefix: %s, addr: %s", i, prefix, addr)
if !configTest {
go graphite.Graphite(metrics.DefaultRegistry, i, prefix, addr)
}
return nil
}
func startPrometheusStats(i time.Duration, c *Config) error {
func startPrometheusStats(i time.Duration, c *Config, configTest bool) error {
namespace := c.GetString("stats.namespace", "")
subsystem := c.GetString("stats.subsystem", "")
@ -79,11 +81,13 @@ func startPrometheusStats(i time.Duration, c *Config) error {
pClient := mp.NewPrometheusProvider(metrics.DefaultRegistry, namespace, subsystem, pr, i)
go pClient.UpdatePrometheusMetrics()
if !configTest {
go func() {
l.Infof("Prometheus stats listening on %s at %s", listen, path)
http.Handle(path, promhttp.HandlerFor(pr, promhttp.HandlerOpts{ErrorLog: l}))
log.Fatal(http.ListenAndServe(listen, nil))
}()
}
return nil
}