traefik/pkg/config/static/static_config.go
2019-05-27 18:02:06 +02:00

369 lines
15 KiB
Go

package static
import (
"errors"
"strings"
"time"
"github.com/containous/flaeg/parse"
"github.com/containous/traefik/pkg/log"
"github.com/containous/traefik/pkg/ping"
acmeprovider "github.com/containous/traefik/pkg/provider/acme"
"github.com/containous/traefik/pkg/provider/docker"
"github.com/containous/traefik/pkg/provider/file"
"github.com/containous/traefik/pkg/provider/kubernetes/crd"
"github.com/containous/traefik/pkg/provider/kubernetes/ingress"
"github.com/containous/traefik/pkg/provider/marathon"
"github.com/containous/traefik/pkg/provider/rancher"
"github.com/containous/traefik/pkg/provider/rest"
"github.com/containous/traefik/pkg/tls"
"github.com/containous/traefik/pkg/tracing/datadog"
"github.com/containous/traefik/pkg/tracing/haystack"
"github.com/containous/traefik/pkg/tracing/instana"
"github.com/containous/traefik/pkg/tracing/jaeger"
"github.com/containous/traefik/pkg/tracing/zipkin"
"github.com/containous/traefik/pkg/types"
assetfs "github.com/elazarl/go-bindata-assetfs"
"github.com/go-acme/lego/challenge/dns01"
jaegercli "github.com/uber/jaeger-client-go"
)
const (
// DefaultInternalEntryPointName the name of the default internal entry point
DefaultInternalEntryPointName = "traefik"
// DefaultGraceTimeout controls how long Traefik serves pending requests
// prior to shutting down.
DefaultGraceTimeout = 10 * time.Second
// DefaultIdleTimeout before closing an idle connection.
DefaultIdleTimeout = 180 * time.Second
// DefaultAcmeCAServer is the default ACME API endpoint
DefaultAcmeCAServer = "https://acme-v02.api.letsencrypt.org/directory"
)
// Configuration is the static configuration
type Configuration struct {
Global *Global `description:"Global configuration options" export:"true"`
ServersTransport *ServersTransport `description:"Servers default transport" export:"true"`
EntryPoints EntryPoints `description:"Entry points definition using format: --entryPoints='Name:http Address::8000' --entryPoints='Name:https Address::4442'" export:"true"`
Providers *Providers `description:"Providers configuration" export:"true"`
API *API `description:"Enable api/dashboard" export:"true"`
Metrics *types.Metrics `description:"Enable a metrics exporter" export:"true"`
Ping *ping.Handler `description:"Enable ping" export:"true"`
// Rest *rest.Provider `description:"Enable Rest backend with default settings" export:"true"`
Log *types.TraefikLog `description:"Traefik log settings" export:"true"`
AccessLog *types.AccessLog `description:"Access log settings" export:"true"`
Tracing *Tracing `description:"OpenTracing configuration" export:"true"`
HostResolver *types.HostResolverConfig `description:"Enable CNAME Flattening" export:"true"`
ACME *acmeprovider.Configuration `description:"Enable ACME (Let's Encrypt): automatic SSL" export:"true"`
}
// Global holds the global configuration.
type Global struct {
Debug bool `short:"d" description:"Enable debug mode" export:"true"`
CheckNewVersion bool `description:"Periodically check if a new version has been released" export:"true"`
SendAnonymousUsage *bool `description:"send periodically anonymous usage statistics" export:"true"`
}
// ServersTransport options to configure communication between Traefik and the servers
type ServersTransport struct {
InsecureSkipVerify bool `description:"Disable SSL certificate verification" export:"true"`
RootCAs tls.FilesOrContents `description:"Add cert file for self-signed certificate"`
MaxIdleConnsPerHost int `description:"If non-zero, controls the maximum idle (keep-alive) to keep per-host. If zero, DefaultMaxIdleConnsPerHost is used" export:"true"`
ForwardingTimeouts *ForwardingTimeouts `description:"Timeouts for requests forwarded to the backend servers" export:"true"`
}
// API holds the API configuration
type API struct {
EntryPoint string `description:"EntryPoint" export:"true"`
Dashboard bool `description:"Activate dashboard" export:"true"`
Statistics *types.Statistics `description:"Enable more detailed statistics" export:"true"`
Middlewares []string `description:"Middleware list" export:"true"`
DashboardAssets *assetfs.AssetFS `json:"-"`
}
// RespondingTimeouts contains timeout configurations for incoming requests to the Traefik instance.
type RespondingTimeouts struct {
ReadTimeout parse.Duration `description:"ReadTimeout is the maximum duration for reading the entire request, including the body. If zero, no timeout is set" export:"true"`
WriteTimeout parse.Duration `description:"WriteTimeout is the maximum duration before timing out writes of the response. If zero, no timeout is set" export:"true"`
IdleTimeout parse.Duration `description:"IdleTimeout is the maximum amount duration an idle (keep-alive) connection will remain idle before closing itself. Defaults to 180 seconds. If zero, no timeout is set" export:"true"`
}
// ForwardingTimeouts contains timeout configurations for forwarding requests to the backend servers.
type ForwardingTimeouts struct {
DialTimeout parse.Duration `description:"The amount of time to wait until a connection to a backend server can be established. Defaults to 30 seconds. If zero, no timeout exists" export:"true"`
ResponseHeaderTimeout parse.Duration `description:"The amount of time to wait for a server's response headers after fully writing the request (including its body, if any). If zero, no timeout exists" export:"true"`
}
// LifeCycle contains configurations relevant to the lifecycle (such as the shutdown phase) of Traefik.
type LifeCycle struct {
RequestAcceptGraceTimeout parse.Duration `description:"Duration to keep accepting requests before Traefik initiates the graceful shutdown procedure"`
GraceTimeOut parse.Duration `description:"Duration to give active requests a chance to finish before Traefik stops"`
}
// Tracing holds the tracing configuration.
type Tracing struct {
Backend string `description:"Selects the tracking backend ('jaeger','zipkin','datadog','instana')." export:"true"`
ServiceName string `description:"Set the name for this service" export:"true"`
SpanNameLimit int `description:"Set the maximum character limit for Span names (default 0 = no limit)" export:"true"`
Jaeger *jaeger.Config `description:"Settings for jaeger"`
Zipkin *zipkin.Config `description:"Settings for zipkin"`
DataDog *datadog.Config `description:"Settings for DataDog"`
Instana *instana.Config `description:"Settings for Instana"`
Haystack *haystack.Config `description:"Settings for Haystack"`
}
// Providers contains providers configuration
type Providers struct {
ProvidersThrottleDuration parse.Duration `description:"Backends throttle duration: minimum duration between 2 events from providers before applying a new configuration. It avoids unnecessary reloads if multiples events are sent in a short amount of time." export:"true"`
Docker *docker.Provider `description:"Enable Docker backend with default settings" export:"true"`
File *file.Provider `description:"Enable File backend with default settings" export:"true"`
Marathon *marathon.Provider `description:"Enable Marathon backend with default settings" export:"true"`
Kubernetes *ingress.Provider `description:"Enable Kubernetes backend with default settings" export:"true"`
KubernetesCRD *crd.Provider `description:"Enable Kubernetes backend with default settings" export:"true"`
Rest *rest.Provider `description:"Enable Rest backend with default settings" export:"true"`
Rancher *rancher.Provider `description:"Enable Rancher backend with default settings" export:"true"`
}
// SetEffectiveConfiguration adds missing configuration parameters derived from existing ones.
// It also takes care of maintaining backwards compatibility.
func (c *Configuration) SetEffectiveConfiguration(configFile string) {
if len(c.EntryPoints) == 0 {
c.EntryPoints = EntryPoints{
"http": &EntryPoint{
Address: ":80",
},
}
}
if (c.API != nil && c.API.EntryPoint == DefaultInternalEntryPointName) ||
(c.Ping != nil && c.Ping.EntryPoint == DefaultInternalEntryPointName) ||
(c.Metrics != nil && c.Metrics.Prometheus != nil && c.Metrics.Prometheus.EntryPoint == DefaultInternalEntryPointName) ||
(c.Providers.Rest != nil && c.Providers.Rest.EntryPoint == DefaultInternalEntryPointName) {
if _, ok := c.EntryPoints[DefaultInternalEntryPointName]; !ok {
c.EntryPoints[DefaultInternalEntryPointName] = &EntryPoint{Address: ":8080"}
}
}
for _, entryPoint := range c.EntryPoints {
if entryPoint.Transport == nil {
entryPoint.Transport = &EntryPointsTransport{}
}
// Make sure LifeCycle isn't nil to spare nil checks elsewhere.
if entryPoint.Transport.LifeCycle == nil {
entryPoint.Transport.LifeCycle = &LifeCycle{
GraceTimeOut: parse.Duration(DefaultGraceTimeout),
}
entryPoint.Transport.RespondingTimeouts = &RespondingTimeouts{
IdleTimeout: parse.Duration(DefaultIdleTimeout),
}
}
if entryPoint.ForwardedHeaders == nil {
entryPoint.ForwardedHeaders = &ForwardedHeaders{}
}
}
if c.Providers.Docker != nil {
if c.Providers.Docker.SwarmModeRefreshSeconds <= 0 {
c.Providers.Docker.SwarmModeRefreshSeconds = 15
}
}
if c.Providers.File != nil {
c.Providers.File.TraefikFile = configFile
}
if c.Providers.Rancher != nil {
if c.Providers.Rancher.RefreshSeconds <= 0 {
c.Providers.Rancher.RefreshSeconds = 15
}
}
c.initACMEProvider()
c.initTracing()
}
func (c *Configuration) initTracing() {
if c.Tracing != nil {
switch c.Tracing.Backend {
case jaeger.Name:
if c.Tracing.Jaeger == nil {
c.Tracing.Jaeger = &jaeger.Config{
SamplingServerURL: "http://localhost:5778/sampling",
SamplingType: "const",
SamplingParam: 1.0,
LocalAgentHostPort: "127.0.0.1:6831",
Propagation: "jaeger",
Gen128Bit: false,
TraceContextHeaderName: jaegercli.TraceContextHeaderName,
}
}
if c.Tracing.Zipkin != nil {
log.Warn("Zipkin configuration will be ignored")
c.Tracing.Zipkin = nil
}
if c.Tracing.DataDog != nil {
log.Warn("DataDog configuration will be ignored")
c.Tracing.DataDog = nil
}
if c.Tracing.Instana != nil {
log.Warn("Instana configuration will be ignored")
c.Tracing.Instana = nil
}
case zipkin.Name:
if c.Tracing.Zipkin == nil {
c.Tracing.Zipkin = &zipkin.Config{
HTTPEndpoint: "http://localhost:9411/api/v1/spans",
SameSpan: false,
ID128Bit: true,
Debug: false,
SampleRate: 1.0,
}
}
if c.Tracing.Jaeger != nil {
log.Warn("Jaeger configuration will be ignored")
c.Tracing.Jaeger = nil
}
if c.Tracing.DataDog != nil {
log.Warn("DataDog configuration will be ignored")
c.Tracing.DataDog = nil
}
if c.Tracing.Instana != nil {
log.Warn("Instana configuration will be ignored")
c.Tracing.Instana = nil
}
case datadog.Name:
if c.Tracing.DataDog == nil {
c.Tracing.DataDog = &datadog.Config{
LocalAgentHostPort: "localhost:8126",
GlobalTag: "",
Debug: false,
}
}
if c.Tracing.Zipkin != nil {
log.Warn("Zipkin configuration will be ignored")
c.Tracing.Zipkin = nil
}
if c.Tracing.Jaeger != nil {
log.Warn("Jaeger configuration will be ignored")
c.Tracing.Jaeger = nil
}
if c.Tracing.Instana != nil {
log.Warn("Instana configuration will be ignored")
c.Tracing.Instana = nil
}
case instana.Name:
if c.Tracing.Instana == nil {
c.Tracing.Instana = &instana.Config{
LocalAgentHost: "localhost",
LocalAgentPort: 42699,
LogLevel: "info",
}
}
if c.Tracing.Zipkin != nil {
log.Warn("Zipkin configuration will be ignored")
c.Tracing.Zipkin = nil
}
if c.Tracing.Jaeger != nil {
log.Warn("Jaeger configuration will be ignored")
c.Tracing.Jaeger = nil
}
if c.Tracing.DataDog != nil {
log.Warn("DataDog configuration will be ignored")
c.Tracing.DataDog = nil
}
default:
log.Warnf("Unknown tracer %q", c.Tracing.Backend)
return
}
}
}
// FIXME handle on new configuration ACME struct
func (c *Configuration) initACMEProvider() {
if c.ACME != nil {
c.ACME.CAServer = getSafeACMECAServer(c.ACME.CAServer)
if c.ACME.DNSChallenge != nil && c.ACME.HTTPChallenge != nil {
log.Warn("Unable to use DNS challenge and HTTP challenge at the same time. Fallback to DNS challenge.")
c.ACME.HTTPChallenge = nil
}
if c.ACME.DNSChallenge != nil && c.ACME.TLSChallenge != nil {
log.Warn("Unable to use DNS challenge and TLS challenge at the same time. Fallback to DNS challenge.")
c.ACME.TLSChallenge = nil
}
if c.ACME.HTTPChallenge != nil && c.ACME.TLSChallenge != nil {
log.Warn("Unable to use HTTP challenge and TLS challenge at the same time. Fallback to TLS challenge.")
c.ACME.HTTPChallenge = nil
}
}
}
// InitACMEProvider create an acme provider from the ACME part of globalConfiguration
func (c *Configuration) InitACMEProvider() (*acmeprovider.Provider, error) {
if c.ACME != nil {
if len(c.ACME.Storage) == 0 {
return nil, errors.New("unable to initialize ACME provider with no storage location for the certificates")
}
return &acmeprovider.Provider{
Configuration: c.ACME,
}, nil
}
return nil, nil
}
// ValidateConfiguration validate that configuration is coherent
func (c *Configuration) ValidateConfiguration() {
if c.ACME != nil {
for _, domain := range c.ACME.Domains {
if domain.Main != dns01.UnFqdn(domain.Main) {
log.Warnf("FQDN detected, please remove the trailing dot: %s", domain.Main)
}
for _, san := range domain.SANs {
if san != dns01.UnFqdn(san) {
log.Warnf("FQDN detected, please remove the trailing dot: %s", san)
}
}
}
}
// FIXME Validate store config?
// if c.ACME != nil {
// if _, ok := c.EntryPoints[c.ACME.EntryPoint]; !ok {
// log.Fatalf("Unknown entrypoint %q for ACME configuration", c.ACME.EntryPoint)
// }
// else if c.EntryPoints[c.ACME.EntryPoint].TLS == nil {
// log.Fatalf("Entrypoint %q has no TLS configuration for ACME configuration", c.ACME.EntryPoint)
// }
// }
}
func getSafeACMECAServer(caServerSrc string) string {
if len(caServerSrc) == 0 {
return DefaultAcmeCAServer
}
if strings.HasPrefix(caServerSrc, "https://acme-v01.api.letsencrypt.org") {
caServer := strings.Replace(caServerSrc, "v01", "v02", 1)
log.Warnf("The CA server %[1]q refers to a v01 endpoint of the ACME API, please change to %[2]q. Fallback to %[2]q.", caServerSrc, caServer)
return caServer
}
if strings.HasPrefix(caServerSrc, "https://acme-staging.api.letsencrypt.org") {
caServer := strings.Replace(caServerSrc, "https://acme-staging.api.letsencrypt.org", "https://acme-staging-v02.api.letsencrypt.org", 1)
log.Warnf("The CA server %[1]q refers to a v01 endpoint of the ACME API, please change to %[2]q. Fallback to %[2]q.", caServerSrc, caServer)
return caServer
}
return caServerSrc
}