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Add Traefik Hub Integration (Experimental Feature)

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Jean-Baptiste Doumenjou 2022-03-24 19:44:08 +01:00 • committed by GitHub
parent 8d58f33a28
commit fbdb6e6e78
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20 changed files with 992 additions and 11 deletions
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61
pkg/config/static/static_config.go
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@ -1,6 +1,7 @@
package static
import (
"errors"
"fmt"
stdlog "log"
"strings"
@ -17,6 +18,7 @@ import (
"github.com/traefik/traefik/v2/pkg/provider/ecs"
"github.com/traefik/traefik/v2/pkg/provider/file"
"github.com/traefik/traefik/v2/pkg/provider/http"
"github.com/traefik/traefik/v2/pkg/provider/hub"
"github.com/traefik/traefik/v2/pkg/provider/kubernetes/crd"
"github.com/traefik/traefik/v2/pkg/provider/kubernetes/gateway"
"github.com/traefik/traefik/v2/pkg/provider/kubernetes/ingress"
@ -79,6 +81,8 @@ type Configuration struct {
// Deprecated.
Pilot *Pilot `description:"Traefik Pilot configuration." json:"pilot,omitempty" toml:"pilot,omitempty" yaml:"pilot,omitempty" export:"true"`
Hub *hub.Provider `description:"Traefik Hub configuration." json:"hub,omitempty" toml:"hub,omitempty" yaml:"hub,omitempty" label:"allowEmpty" file:"allowEmpty" export:"true"`
Experimental *Experimental `description:"experimental features." json:"experimental,omitempty" toml:"experimental,omitempty" yaml:"experimental,omitempty" export:"true"`
}
@ -197,10 +201,14 @@ type Providers struct {
// It also takes care of maintaining backwards compatibility.
func (c *Configuration) SetEffectiveConfiguration() {
// Creates the default entry point if needed
if len(c.EntryPoints) == 0 {
if len(c.EntryPoints) == 0 || (c.Hub != nil && len(c.EntryPoints) == 1 && c.EntryPoints[c.Hub.EntryPoint] != nil) {
ep := &EntryPoint{Address: ":80"}
ep.SetDefaults()
c.EntryPoints = EntryPoints{"http": ep}
// TODO: double check this tomorrow
if c.EntryPoints == nil {
c.EntryPoints = make(EntryPoints)
}
c.EntryPoints["http"] = ep
}
// Creates the internal traefik entry point if needed
@ -215,6 +223,15 @@ func (c *Configuration) SetEffectiveConfiguration() {
}
}
if c.Hub != nil {
if err := c.initHubProvider(); err != nil {
c.Hub = nil
log.WithoutContext().Errorf("Unable to activate the Hub provider: %v", err)
} else {
log.WithoutContext().Debugf("Experimental Hub provider has been activated.")
}
}
if c.Providers.Docker != nil {
if c.Providers.Docker.SwarmModeRefreshSeconds <= 0 {
c.Providers.Docker.SwarmModeRefreshSeconds = ptypes.Duration(15 * time.Second)
@ -280,6 +297,46 @@ func (c *Configuration) initACMEProvider() {
legolog.Logger = stdlog.New(log.WithoutContext().WriterLevel(logrus.DebugLevel), "legolog: ", 0)
}
func (c *Configuration) initHubProvider() error {
// Hub provider is an experimental feature. Require the experimental flag to be enabled before continuing.
if c.Experimental == nil || !c.Experimental.Hub {
return errors.New("experimental flag for Hub not set")
}
if c.Hub.TLS == nil {
return errors.New("no TLS configuration defined for Hub")
}
if c.Hub.TLS.Insecure && (c.Hub.TLS.CA != "" || c.Hub.TLS.Cert != "" || c.Hub.TLS.Key != "") {
return errors.New("mTLS configuration for Hub and insecure TLS for Hub are mutually exclusive")
}
if !c.Hub.TLS.Insecure && (c.Hub.TLS.CA == "" || c.Hub.TLS.Cert == "" || c.Hub.TLS.Key == "") {
return errors.New("incomplete mTLS configuration for Hub")
}
if c.Hub.TLS.Insecure {
log.WithoutContext().Warn("Hub is in `insecure` mode. Do not run in production with this setup.")
}
// Creates the internal Hub entry point if needed.
if c.Hub.EntryPoint == hub.DefaultEntryPointName {
if _, ok := c.EntryPoints[hub.DefaultEntryPointName]; !ok {
var ep EntryPoint
ep.SetDefaults()
ep.Address = ":9900"
c.EntryPoints[hub.DefaultEntryPointName] = &ep
log.WithoutContext().Infof("The entryPoint %q is created on port 9900 to allow Traefik to communicate with the Hub Agent for Traefik.", hub.DefaultEntryPointName)
}
}
c.EntryPoints[c.Hub.EntryPoint].HTTP.TLS = &TLSConfig{
Options: "traefik-hub",
}
return nil
}
// ValidateConfiguration validate that configuration is coherent.
func (c *Configuration) ValidateConfiguration() error {
var acmeEmail string