traefik/configuration/configuration.go
2018-07-13 18:06:07 +02:00

529 lines
23 KiB
Go

package configuration
import (
"fmt"
"strings"
"time"
"github.com/containous/flaeg"
"github.com/containous/traefik-extra-service-fabric"
"github.com/containous/traefik/acme"
"github.com/containous/traefik/api"
"github.com/containous/traefik/log"
"github.com/containous/traefik/middlewares/tracing"
"github.com/containous/traefik/middlewares/tracing/jaeger"
"github.com/containous/traefik/middlewares/tracing/zipkin"
"github.com/containous/traefik/ping"
acmeprovider "github.com/containous/traefik/provider/acme"
"github.com/containous/traefik/provider/boltdb"
"github.com/containous/traefik/provider/consul"
"github.com/containous/traefik/provider/consulcatalog"
"github.com/containous/traefik/provider/docker"
"github.com/containous/traefik/provider/dynamodb"
"github.com/containous/traefik/provider/ecs"
"github.com/containous/traefik/provider/etcd"
"github.com/containous/traefik/provider/eureka"
"github.com/containous/traefik/provider/file"
"github.com/containous/traefik/provider/kubernetes"
"github.com/containous/traefik/provider/marathon"
"github.com/containous/traefik/provider/mesos"
"github.com/containous/traefik/provider/rancher"
"github.com/containous/traefik/provider/rest"
"github.com/containous/traefik/provider/zk"
"github.com/containous/traefik/tls"
"github.com/containous/traefik/types"
)
const (
// DefaultInternalEntryPointName the name of the default internal entry point
DefaultInternalEntryPointName = "traefik"
// DefaultHealthCheckInterval is the default health check interval.
DefaultHealthCheckInterval = 30 * time.Second
// DefaultDialTimeout when connecting to a backend server.
DefaultDialTimeout = 30 * time.Second
// DefaultIdleTimeout before closing an idle connection.
DefaultIdleTimeout = 180 * time.Second
// DefaultGraceTimeout controls how long Traefik serves pending requests
// prior to shutting down.
DefaultGraceTimeout = 10 * time.Second
// DefaultAcmeCAServer is the default ACME API endpoint
DefaultAcmeCAServer = "https://acme-v02.api.letsencrypt.org/directory"
)
// GlobalConfiguration holds global configuration (with providers, etc.).
// It's populated from the traefik configuration file passed as an argument to the binary.
type GlobalConfiguration struct {
LifeCycle *LifeCycle `description:"Timeouts influencing the server life cycle" export:"true"`
GraceTimeOut flaeg.Duration `short:"g" description:"(Deprecated) Duration to give active requests a chance to finish before Traefik stops" export:"true"` // Deprecated
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"`
AccessLogsFile string `description:"(Deprecated) Access logs file" export:"true"` // Deprecated
AccessLog *types.AccessLog `description:"Access log settings" export:"true"`
TraefikLogsFile string `description:"(Deprecated) Traefik logs file. Stdout is used when omitted or empty" export:"true"` // Deprecated
TraefikLog *types.TraefikLog `description:"Traefik log settings" export:"true"`
Tracing *tracing.Tracing `description:"OpenTracing configuration" export:"true"`
LogLevel string `short:"l" description:"Log level" export:"true"`
EntryPoints EntryPoints `description:"Entrypoints definition using format: --entryPoints='Name:http Address::8000 Redirect.EntryPoint:https' --entryPoints='Name:https Address::4442 TLS:tests/traefik.crt,tests/traefik.key;prod/traefik.crt,prod/traefik.key'" export:"true"`
Cluster *types.Cluster
Constraints types.Constraints `description:"Filter services by constraint, matching with service tags" export:"true"`
ACME *acme.ACME `description:"Enable ACME (Let's Encrypt): automatic SSL" export:"true"`
DefaultEntryPoints DefaultEntryPoints `description:"Entrypoints to be used by frontends that do not specify any entrypoint" export:"true"`
ProvidersThrottleDuration flaeg.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"`
MaxIdleConnsPerHost int `description:"If non-zero, controls the maximum idle (keep-alive) to keep per-host. If zero, DefaultMaxIdleConnsPerHost is used" export:"true"`
IdleTimeout flaeg.Duration `description:"(Deprecated) maximum amount of time an idle (keep-alive) connection will remain idle before closing itself." export:"true"` // Deprecated
InsecureSkipVerify bool `description:"Disable SSL certificate verification" export:"true"`
RootCAs tls.RootCAs `description:"Add cert file for self-signed certificate"`
Retry *Retry `description:"Enable retry sending request if network error" export:"true"`
HealthCheck *HealthCheckConfig `description:"Health check parameters" export:"true"`
RespondingTimeouts *RespondingTimeouts `description:"Timeouts for incoming requests to the Traefik instance" export:"true"`
ForwardingTimeouts *ForwardingTimeouts `description:"Timeouts for requests forwarded to the backend servers" export:"true"`
AllowMinWeightZero bool `description:"Allow weight to take 0 as minimum real value." export:"true"` // Deprecated
Web *WebCompatibility `description:"(Deprecated) Enable Web backend with default settings" export:"true"` // Deprecated
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"`
Consul *consul.Provider `description:"Enable Consul backend with default settings" export:"true"`
ConsulCatalog *consulcatalog.Provider `description:"Enable Consul catalog backend with default settings" export:"true"`
Etcd *etcd.Provider `description:"Enable Etcd backend with default settings" export:"true"`
Zookeeper *zk.Provider `description:"Enable Zookeeper backend with default settings" export:"true"`
Boltdb *boltdb.Provider `description:"Enable Boltdb backend with default settings" export:"true"`
Kubernetes *kubernetes.Provider `description:"Enable Kubernetes backend with default settings" export:"true"`
Mesos *mesos.Provider `description:"Enable Mesos backend with default settings" export:"true"`
Eureka *eureka.Provider `description:"Enable Eureka backend with default settings" export:"true"`
ECS *ecs.Provider `description:"Enable ECS backend with default settings" export:"true"`
Rancher *rancher.Provider `description:"Enable Rancher backend with default settings" export:"true"`
DynamoDB *dynamodb.Provider `description:"Enable DynamoDB backend with default settings" export:"true"`
ServiceFabric *servicefabric.Provider `description:"Enable Service Fabric backend with default settings" export:"true"`
Rest *rest.Provider `description:"Enable Rest backend with default settings" export:"true"`
API *api.Handler `description:"Enable api/dashboard" export:"true"`
Metrics *types.Metrics `description:"Enable a metrics exporter" export:"true"`
Ping *ping.Handler `description:"Enable ping" export:"true"`
HostResolver *HostResolverConfig `description:"Enable CNAME Flattening" export:"true"`
}
// WebCompatibility is a configuration to handle compatibility with deprecated web provider options
type WebCompatibility struct {
Address string `description:"(Deprecated) Web administration port" export:"true"`
CertFile string `description:"(Deprecated) SSL certificate" export:"true"`
KeyFile string `description:"(Deprecated) SSL certificate" export:"true"`
ReadOnly bool `description:"(Deprecated) Enable read only API" export:"true"`
Statistics *types.Statistics `description:"(Deprecated) Enable more detailed statistics" export:"true"`
Metrics *types.Metrics `description:"(Deprecated) Enable a metrics exporter" export:"true"`
Path string `description:"(Deprecated) Root path for dashboard and API" export:"true"`
Auth *types.Auth `export:"true"`
Debug bool `export:"true"`
}
func (gc *GlobalConfiguration) handleWebDeprecation() {
if gc.Web != nil {
log.Warn("web provider configuration is deprecated, you should use these options : api, rest provider, ping and metrics")
if gc.API != nil || gc.Metrics != nil || gc.Ping != nil || gc.Rest != nil {
log.Warn("web option is ignored if you use it with one of these options : api, rest provider, ping or metrics")
return
}
gc.EntryPoints[DefaultInternalEntryPointName] = &EntryPoint{
Address: gc.Web.Address,
Auth: gc.Web.Auth,
}
if gc.Web.CertFile != "" {
gc.EntryPoints[DefaultInternalEntryPointName].TLS = &tls.TLS{
Certificates: []tls.Certificate{
{
CertFile: tls.FileOrContent(gc.Web.CertFile),
KeyFile: tls.FileOrContent(gc.Web.KeyFile),
},
},
}
}
if gc.API == nil {
gc.API = &api.Handler{
EntryPoint: DefaultInternalEntryPointName,
Statistics: gc.Web.Statistics,
Dashboard: true,
}
}
if gc.Ping == nil {
gc.Ping = &ping.Handler{
EntryPoint: DefaultInternalEntryPointName,
}
}
if gc.Metrics == nil {
gc.Metrics = gc.Web.Metrics
}
if !gc.Debug {
gc.Debug = gc.Web.Debug
}
}
}
// SetEffectiveConfiguration adds missing configuration parameters derived from existing ones.
// It also takes care of maintaining backwards compatibility.
func (gc *GlobalConfiguration) SetEffectiveConfiguration(configFile string) {
if len(gc.EntryPoints) == 0 {
gc.EntryPoints = map[string]*EntryPoint{"http": {
Address: ":80",
ForwardedHeaders: &ForwardedHeaders{Insecure: true},
}}
gc.DefaultEntryPoints = []string{"http"}
}
gc.handleWebDeprecation()
if (gc.API != nil && gc.API.EntryPoint == DefaultInternalEntryPointName) ||
(gc.Ping != nil && gc.Ping.EntryPoint == DefaultInternalEntryPointName) ||
(gc.Metrics != nil && gc.Metrics.Prometheus != nil && gc.Metrics.Prometheus.EntryPoint == DefaultInternalEntryPointName) ||
(gc.Rest != nil && gc.Rest.EntryPoint == DefaultInternalEntryPointName) {
if _, ok := gc.EntryPoints[DefaultInternalEntryPointName]; !ok {
gc.EntryPoints[DefaultInternalEntryPointName] = &EntryPoint{Address: ":8080"}
}
}
for entryPointName := range gc.EntryPoints {
entryPoint := gc.EntryPoints[entryPointName]
// ForwardedHeaders must be remove in the next breaking version
if entryPoint.ForwardedHeaders == nil {
entryPoint.ForwardedHeaders = &ForwardedHeaders{Insecure: true}
}
if len(entryPoint.WhitelistSourceRange) > 0 {
log.Warnf("Deprecated configuration found: %s. Please use %s.", "whiteListSourceRange", "whiteList.sourceRange")
if entryPoint.WhiteList == nil {
entryPoint.WhiteList = &types.WhiteList{
SourceRange: entryPoint.WhitelistSourceRange,
}
entryPoint.WhitelistSourceRange = nil
}
}
}
// Make sure LifeCycle isn't nil to spare nil checks elsewhere.
if gc.LifeCycle == nil {
gc.LifeCycle = &LifeCycle{}
}
// Prefer legacy grace timeout parameter for backwards compatibility reasons.
if gc.GraceTimeOut > 0 {
log.Warn("top-level grace period configuration has been deprecated -- please use lifecycle grace period")
gc.LifeCycle.GraceTimeOut = gc.GraceTimeOut
}
if gc.Docker != nil {
if len(gc.Docker.Filename) != 0 && gc.Docker.TemplateVersion != 2 {
log.Warn("Template version 1 is deprecated, please use version 2, see TemplateVersion.")
gc.Docker.TemplateVersion = 1
} else {
gc.Docker.TemplateVersion = 2
}
}
if gc.Marathon != nil {
if len(gc.Marathon.Filename) != 0 && gc.Marathon.TemplateVersion != 2 {
log.Warn("Template version 1 is deprecated, please use version 2, see TemplateVersion.")
gc.Marathon.TemplateVersion = 1
} else {
gc.Marathon.TemplateVersion = 2
}
}
if gc.Mesos != nil {
if len(gc.Mesos.Filename) != 0 && gc.Mesos.TemplateVersion != 2 {
log.Warn("Template version 1 is deprecated, please use version 2, see TemplateVersion.")
gc.Mesos.TemplateVersion = 1
} else {
gc.Mesos.TemplateVersion = 2
}
}
if gc.Eureka != nil {
if gc.Eureka.Delay != 0 {
log.Warn("Delay has been deprecated -- please use RefreshSeconds")
gc.Eureka.RefreshSeconds = gc.Eureka.Delay
}
}
if gc.ECS != nil {
if len(gc.ECS.Filename) != 0 && gc.ECS.TemplateVersion != 2 {
log.Warn("Template version 1 is deprecated, please use version 2, see TemplateVersion.")
gc.ECS.TemplateVersion = 1
} else {
gc.ECS.TemplateVersion = 2
}
}
if gc.ConsulCatalog != nil {
if len(gc.ConsulCatalog.Filename) != 0 && gc.ConsulCatalog.TemplateVersion != 2 {
log.Warn("Template version 1 is deprecated, please use version 2, see TemplateVersion.")
gc.ConsulCatalog.TemplateVersion = 1
} else {
gc.ConsulCatalog.TemplateVersion = 2
}
}
if gc.Rancher != nil {
if len(gc.Rancher.Filename) != 0 && gc.Rancher.TemplateVersion != 2 {
log.Warn("Template version 1 is deprecated, please use version 2, see TemplateVersion.")
gc.Rancher.TemplateVersion = 1
} else {
gc.Rancher.TemplateVersion = 2
}
// Ensure backwards compatibility for now
if len(gc.Rancher.AccessKey) > 0 ||
len(gc.Rancher.Endpoint) > 0 ||
len(gc.Rancher.SecretKey) > 0 {
if gc.Rancher.API == nil {
gc.Rancher.API = &rancher.APIConfiguration{
AccessKey: gc.Rancher.AccessKey,
SecretKey: gc.Rancher.SecretKey,
Endpoint: gc.Rancher.Endpoint,
}
}
log.Warn("Deprecated configuration found: rancher.[accesskey|secretkey|endpoint]. " +
"Please use rancher.api.[accesskey|secretkey|endpoint] instead.")
}
if gc.Rancher.Metadata != nil && len(gc.Rancher.Metadata.Prefix) == 0 {
gc.Rancher.Metadata.Prefix = "latest"
}
}
if gc.API != nil {
gc.API.Debug = gc.Debug
}
if gc.Web != nil && (gc.Web.Path == "" || !strings.HasSuffix(gc.Web.Path, "/")) {
gc.Web.Path += "/"
}
if gc.File != nil {
gc.File.TraefikFile = configFile
}
gc.initACMEProvider()
gc.initTracing()
}
func (gc *GlobalConfiguration) initTracing() {
if gc.Tracing != nil {
switch gc.Tracing.Backend {
case jaeger.Name:
if gc.Tracing.Jaeger == nil {
gc.Tracing.Jaeger = &jaeger.Config{
SamplingServerURL: "http://localhost:5778/sampling",
SamplingType: "const",
SamplingParam: 1.0,
LocalAgentHostPort: "127.0.0.1:6831",
}
}
if gc.Tracing.Zipkin != nil {
log.Warn("Zipkin configuration will be ignored")
gc.Tracing.Zipkin = nil
}
case zipkin.Name:
if gc.Tracing.Zipkin == nil {
gc.Tracing.Zipkin = &zipkin.Config{
HTTPEndpoint: "http://localhost:9411/api/v1/spans",
SameSpan: false,
ID128Bit: true,
Debug: false,
}
}
if gc.Tracing.Jaeger != nil {
log.Warn("Jaeger configuration will be ignored")
gc.Tracing.Jaeger = nil
}
default:
log.Warnf("Unknown tracer %q", gc.Tracing.Backend)
return
}
}
}
func (gc *GlobalConfiguration) initACMEProvider() {
if gc.ACME != nil {
gc.ACME.CAServer = getSafeACMECAServer(gc.ACME.CAServer)
if gc.ACME.DNSChallenge != nil && gc.ACME.HTTPChallenge != nil {
log.Warn("Unable to use DNS challenge and HTTP challenge at the same time. Fallback to DNS challenge.")
gc.ACME.HTTPChallenge = nil
}
if gc.ACME.DNSChallenge != nil && gc.ACME.TLSChallenge != nil {
log.Warn("Unable to use DNS challenge and TLS challenge at the same time. Fallback to DNS challenge.")
gc.ACME.TLSChallenge = nil
}
if gc.ACME.HTTPChallenge != nil && gc.ACME.TLSChallenge != nil {
log.Warn("Unable to use HTTP challenge and TLS challenge at the same time. Fallback to TLS challenge.")
gc.ACME.HTTPChallenge = nil
}
// TODO: to remove in the future
if len(gc.ACME.StorageFile) > 0 && len(gc.ACME.Storage) == 0 {
log.Warn("ACME.StorageFile is deprecated, use ACME.Storage instead")
gc.ACME.Storage = gc.ACME.StorageFile
}
if len(gc.ACME.DNSProvider) > 0 {
log.Warn("ACME.DNSProvider is deprecated, use ACME.DNSChallenge instead")
gc.ACME.DNSChallenge = &acmeprovider.DNSChallenge{Provider: gc.ACME.DNSProvider, DelayBeforeCheck: gc.ACME.DelayDontCheckDNS}
}
if gc.ACME.OnDemand {
log.Warn("ACME.OnDemand is deprecated")
}
}
}
// InitACMEProvider create an acme provider from the ACME part of globalConfiguration
func (gc *GlobalConfiguration) InitACMEProvider() *acmeprovider.Provider {
if gc.ACME != nil {
// TODO: Remove when Provider ACME will replace totally ACME
// If provider file, use Provider ACME instead of ACME
if gc.Cluster == nil {
provider := &acmeprovider.Provider{}
provider.Configuration = &acmeprovider.Configuration{
KeyType: gc.ACME.KeyType,
OnHostRule: gc.ACME.OnHostRule,
OnDemand: gc.ACME.OnDemand,
Email: gc.ACME.Email,
Storage: gc.ACME.Storage,
HTTPChallenge: gc.ACME.HTTPChallenge,
DNSChallenge: gc.ACME.DNSChallenge,
TLSChallenge: gc.ACME.TLSChallenge,
Domains: gc.ACME.Domains,
ACMELogging: gc.ACME.ACMELogging,
CAServer: gc.ACME.CAServer,
EntryPoint: gc.ACME.EntryPoint,
}
store := acmeprovider.NewLocalStore(provider.Storage)
provider.Store = store
acme.ConvertToNewFormat(provider.Storage)
gc.ACME = nil
return provider
}
}
return nil
}
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
}
// ValidateConfiguration validate that configuration is coherent
func (gc *GlobalConfiguration) ValidateConfiguration() {
if gc.ACME != nil {
if _, ok := gc.EntryPoints[gc.ACME.EntryPoint]; !ok {
log.Fatalf("Unknown entrypoint %q for ACME configuration", gc.ACME.EntryPoint)
} else {
if gc.EntryPoints[gc.ACME.EntryPoint].TLS == nil {
log.Fatalf("Entrypoint %q has no TLS configuration for ACME configuration", gc.ACME.EntryPoint)
}
}
}
}
// DefaultEntryPoints holds default entry points
type DefaultEntryPoints []string
// String is the method to format the flag's value, part of the flag.Value interface.
// The String method's output will be used in diagnostics.
func (dep *DefaultEntryPoints) String() string {
return strings.Join(*dep, ",")
}
// Set is the method to set the flag value, part of the flag.Value interface.
// Set's argument is a string to be parsed to set the flag.
// It's a comma-separated list, so we split it.
func (dep *DefaultEntryPoints) Set(value string) error {
entrypoints := strings.Split(value, ",")
if len(entrypoints) == 0 {
return fmt.Errorf("bad DefaultEntryPoints format: %s", value)
}
for _, entrypoint := range entrypoints {
*dep = append(*dep, entrypoint)
}
return nil
}
// Get return the EntryPoints map
func (dep *DefaultEntryPoints) Get() interface{} {
return *dep
}
// SetValue sets the EntryPoints map with val
func (dep *DefaultEntryPoints) SetValue(val interface{}) {
*dep = val.(DefaultEntryPoints)
}
// Type is type of the struct
func (dep *DefaultEntryPoints) Type() string {
return "defaultentrypoints"
}
// Retry contains request retry config
type Retry struct {
Attempts int `description:"Number of attempts" export:"true"`
}
// HealthCheckConfig contains health check configuration parameters.
type HealthCheckConfig struct {
Interval flaeg.Duration `description:"Default periodicity of enabled health checks" export:"true"`
}
// RespondingTimeouts contains timeout configurations for incoming requests to the Traefik instance.
type RespondingTimeouts struct {
ReadTimeout flaeg.Duration `description:"ReadTimeout is the maximum duration for reading the entire request, including the body. If zero, no timeout is set" export:"true"`
WriteTimeout flaeg.Duration `description:"WriteTimeout is the maximum duration before timing out writes of the response. If zero, no timeout is set" export:"true"`
IdleTimeout flaeg.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 flaeg.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 flaeg.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 flaeg.Duration `description:"Duration to keep accepting requests before Traefik initiates the graceful shutdown procedure"`
GraceTimeOut flaeg.Duration `description:"Duration to give active requests a chance to finish before Traefik stops"`
}
// HostResolverConfig contain configuration for CNAME Flattening
type HostResolverConfig struct {
CnameFlattening bool `description:"A flag to enable/disable CNAME flattening" export:"true"`
ResolvConfig string `description:"resolv.conf used for DNS resolving" export:"true"`
ResolvDepth int `description:"The maximal depth of DNS recursive resolving" export:"true"`
}