411 lines
18 KiB
Go
411 lines
18 KiB
Go
package configuration
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import (
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"fmt"
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"strings"
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"time"
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"github.com/containous/flaeg/parse"
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"github.com/containous/traefik-extra-service-fabric"
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"github.com/containous/traefik/acme"
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"github.com/containous/traefik/api"
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"github.com/containous/traefik/log"
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"github.com/containous/traefik/middlewares/tracing"
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"github.com/containous/traefik/middlewares/tracing/datadog"
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"github.com/containous/traefik/middlewares/tracing/jaeger"
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"github.com/containous/traefik/middlewares/tracing/zipkin"
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"github.com/containous/traefik/ping"
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acmeprovider "github.com/containous/traefik/provider/acme"
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"github.com/containous/traefik/provider/boltdb"
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"github.com/containous/traefik/provider/consul"
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"github.com/containous/traefik/provider/consulcatalog"
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"github.com/containous/traefik/provider/docker"
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"github.com/containous/traefik/provider/dynamodb"
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"github.com/containous/traefik/provider/ecs"
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"github.com/containous/traefik/provider/etcd"
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"github.com/containous/traefik/provider/eureka"
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"github.com/containous/traefik/provider/file"
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"github.com/containous/traefik/provider/kubernetes"
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"github.com/containous/traefik/provider/marathon"
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"github.com/containous/traefik/provider/mesos"
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"github.com/containous/traefik/provider/rancher"
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"github.com/containous/traefik/provider/rest"
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"github.com/containous/traefik/provider/zk"
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"github.com/containous/traefik/tls"
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"github.com/containous/traefik/types"
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)
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const (
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// DefaultInternalEntryPointName the name of the default internal entry point
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DefaultInternalEntryPointName = "traefik"
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// DefaultHealthCheckInterval is the default health check interval.
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DefaultHealthCheckInterval = 30 * time.Second
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// DefaultHealthCheckTimeout is the default health check request timeout.
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DefaultHealthCheckTimeout = 5 * time.Second
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// DefaultDialTimeout when connecting to a backend server.
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DefaultDialTimeout = 30 * time.Second
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// DefaultIdleTimeout before closing an idle connection.
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DefaultIdleTimeout = 180 * time.Second
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// DefaultGraceTimeout controls how long Traefik serves pending requests
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// prior to shutting down.
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DefaultGraceTimeout = 10 * time.Second
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// DefaultAcmeCAServer is the default ACME API endpoint
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DefaultAcmeCAServer = "https://acme-v02.api.letsencrypt.org/directory"
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)
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// GlobalConfiguration holds global configuration (with providers, etc.).
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// It's populated from the traefik configuration file passed as an argument to the binary.
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type GlobalConfiguration struct {
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LifeCycle *LifeCycle `description:"Timeouts influencing the server life cycle" export:"true"`
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Debug bool `short:"d" description:"Enable debug mode" export:"true"`
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CheckNewVersion bool `description:"Periodically check if a new version has been released" export:"true"`
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SendAnonymousUsage bool `description:"send periodically anonymous usage statistics" export:"true"`
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AccessLog *types.AccessLog `description:"Access log settings" export:"true"`
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TraefikLog *types.TraefikLog `description:"Traefik log settings" export:"true"`
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Tracing *tracing.Tracing `description:"OpenTracing configuration" export:"true"`
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LogLevel string `short:"l" description:"Log level" export:"true"`
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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"`
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Cluster *types.Cluster
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Constraints types.Constraints `description:"Filter services by constraint, matching with service tags" export:"true"`
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ACME *acme.ACME `description:"Enable ACME (Let's Encrypt): automatic SSL" export:"true"`
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DefaultEntryPoints DefaultEntryPoints `description:"Entrypoints to be used by frontends that do not specify any entrypoint" export:"true"`
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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"`
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MaxIdleConnsPerHost int `description:"If non-zero, controls the maximum idle (keep-alive) to keep per-host. If zero, DefaultMaxIdleConnsPerHost is used" export:"true"`
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InsecureSkipVerify bool `description:"Disable SSL certificate verification" export:"true"`
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RootCAs tls.FilesOrContents `description:"Add cert file for self-signed certificate"`
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Retry *Retry `description:"Enable retry sending request if network error" export:"true"`
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HealthCheck *HealthCheckConfig `description:"Health check parameters" export:"true"`
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RespondingTimeouts *RespondingTimeouts `description:"Timeouts for incoming requests to the Traefik instance" export:"true"`
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ForwardingTimeouts *ForwardingTimeouts `description:"Timeouts for requests forwarded to the backend servers" export:"true"`
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Docker *docker.Provider `description:"Enable Docker backend with default settings" export:"true"`
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File *file.Provider `description:"Enable File backend with default settings" export:"true"`
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Marathon *marathon.Provider `description:"Enable Marathon backend with default settings" export:"true"`
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Consul *consul.Provider `description:"Enable Consul backend with default settings" export:"true"`
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ConsulCatalog *consulcatalog.Provider `description:"Enable Consul catalog backend with default settings" export:"true"`
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Etcd *etcd.Provider `description:"Enable Etcd backend with default settings" export:"true"`
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Zookeeper *zk.Provider `description:"Enable Zookeeper backend with default settings" export:"true"`
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Boltdb *boltdb.Provider `description:"Enable Boltdb backend with default settings" export:"true"`
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Kubernetes *kubernetes.Provider `description:"Enable Kubernetes backend with default settings" export:"true"`
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Mesos *mesos.Provider `description:"Enable Mesos backend with default settings" export:"true"`
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Eureka *eureka.Provider `description:"Enable Eureka backend with default settings" export:"true"`
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ECS *ecs.Provider `description:"Enable ECS backend with default settings" export:"true"`
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Rancher *rancher.Provider `description:"Enable Rancher backend with default settings" export:"true"`
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DynamoDB *dynamodb.Provider `description:"Enable DynamoDB backend with default settings" export:"true"`
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ServiceFabric *servicefabric.Provider `description:"Enable Service Fabric backend with default settings" export:"true"`
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Rest *rest.Provider `description:"Enable Rest backend with default settings" export:"true"`
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API *api.Handler `description:"Enable api/dashboard" export:"true"`
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Metrics *types.Metrics `description:"Enable a metrics exporter" export:"true"`
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Ping *ping.Handler `description:"Enable ping" export:"true"`
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HostResolver *HostResolverConfig `description:"Enable CNAME Flattening" export:"true"`
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}
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// SetEffectiveConfiguration adds missing configuration parameters derived from existing ones.
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// It also takes care of maintaining backwards compatibility.
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func (gc *GlobalConfiguration) SetEffectiveConfiguration(configFile string) {
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if len(gc.EntryPoints) == 0 {
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gc.EntryPoints = map[string]*EntryPoint{"http": {
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Address: ":80",
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ForwardedHeaders: &ForwardedHeaders{},
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}}
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gc.DefaultEntryPoints = []string{"http"}
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}
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if (gc.API != nil && gc.API.EntryPoint == DefaultInternalEntryPointName) ||
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(gc.Ping != nil && gc.Ping.EntryPoint == DefaultInternalEntryPointName) ||
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(gc.Metrics != nil && gc.Metrics.Prometheus != nil && gc.Metrics.Prometheus.EntryPoint == DefaultInternalEntryPointName) ||
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(gc.Rest != nil && gc.Rest.EntryPoint == DefaultInternalEntryPointName) {
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if _, ok := gc.EntryPoints[DefaultInternalEntryPointName]; !ok {
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gc.EntryPoints[DefaultInternalEntryPointName] = &EntryPoint{Address: ":8080"}
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}
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}
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for entryPointName := range gc.EntryPoints {
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entryPoint := gc.EntryPoints[entryPointName]
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// ForwardedHeaders must be remove in the next breaking version
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if entryPoint.ForwardedHeaders == nil {
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entryPoint.ForwardedHeaders = &ForwardedHeaders{}
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}
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if entryPoint.TLS != nil && entryPoint.TLS.DefaultCertificate == nil && len(entryPoint.TLS.Certificates) > 0 {
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log.Infof("No tls.defaultCertificate given for %s: using the first item in tls.certificates as a fallback.", entryPointName)
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entryPoint.TLS.DefaultCertificate = &entryPoint.TLS.Certificates[0]
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}
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}
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// Make sure LifeCycle isn't nil to spare nil checks elsewhere.
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if gc.LifeCycle == nil {
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gc.LifeCycle = &LifeCycle{}
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}
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if gc.Rancher != nil {
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// Ensure backwards compatibility for now
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if len(gc.Rancher.AccessKey) > 0 ||
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len(gc.Rancher.Endpoint) > 0 ||
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len(gc.Rancher.SecretKey) > 0 {
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if gc.Rancher.API == nil {
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gc.Rancher.API = &rancher.APIConfiguration{
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AccessKey: gc.Rancher.AccessKey,
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SecretKey: gc.Rancher.SecretKey,
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Endpoint: gc.Rancher.Endpoint,
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}
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}
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log.Warn("Deprecated configuration found: rancher.[accesskey|secretkey|endpoint]. " +
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"Please use rancher.api.[accesskey|secretkey|endpoint] instead.")
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}
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if gc.Rancher.Metadata != nil && len(gc.Rancher.Metadata.Prefix) == 0 {
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gc.Rancher.Metadata.Prefix = "latest"
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}
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}
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if gc.API != nil {
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gc.API.Debug = gc.Debug
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}
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if gc.File != nil {
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gc.File.TraefikFile = configFile
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}
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gc.initACMEProvider()
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gc.initTracing()
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}
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func (gc *GlobalConfiguration) initTracing() {
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if gc.Tracing != nil {
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switch gc.Tracing.Backend {
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case jaeger.Name:
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if gc.Tracing.Jaeger == nil {
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gc.Tracing.Jaeger = &jaeger.Config{
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SamplingServerURL: "http://localhost:5778/sampling",
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SamplingType: "const",
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SamplingParam: 1.0,
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LocalAgentHostPort: "127.0.0.1:6831",
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Propagation: "jaeger",
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Gen128Bit: false,
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}
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}
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if gc.Tracing.Zipkin != nil {
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log.Warn("Zipkin configuration will be ignored")
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gc.Tracing.Zipkin = nil
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}
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if gc.Tracing.DataDog != nil {
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log.Warn("DataDog configuration will be ignored")
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gc.Tracing.DataDog = nil
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}
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case zipkin.Name:
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if gc.Tracing.Zipkin == nil {
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gc.Tracing.Zipkin = &zipkin.Config{
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HTTPEndpoint: "http://localhost:9411/api/v1/spans",
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SameSpan: false,
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ID128Bit: true,
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Debug: false,
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}
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}
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if gc.Tracing.Jaeger != nil {
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log.Warn("Jaeger configuration will be ignored")
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gc.Tracing.Jaeger = nil
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}
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if gc.Tracing.DataDog != nil {
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log.Warn("DataDog configuration will be ignored")
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gc.Tracing.DataDog = nil
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}
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case datadog.Name:
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if gc.Tracing.DataDog == nil {
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gc.Tracing.DataDog = &datadog.Config{
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LocalAgentHostPort: "localhost:8126",
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GlobalTag: "",
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Debug: false,
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}
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}
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if gc.Tracing.Zipkin != nil {
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log.Warn("Zipkin configuration will be ignored")
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gc.Tracing.Zipkin = nil
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}
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if gc.Tracing.Jaeger != nil {
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log.Warn("Jaeger configuration will be ignored")
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gc.Tracing.Jaeger = nil
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}
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default:
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log.Warnf("Unknown tracer %q", gc.Tracing.Backend)
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return
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}
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}
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}
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func (gc *GlobalConfiguration) initACMEProvider() {
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if gc.ACME != nil {
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gc.ACME.CAServer = getSafeACMECAServer(gc.ACME.CAServer)
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if gc.ACME.DNSChallenge != nil && gc.ACME.HTTPChallenge != nil {
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log.Warn("Unable to use DNS challenge and HTTP challenge at the same time. Fallback to DNS challenge.")
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gc.ACME.HTTPChallenge = nil
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}
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if gc.ACME.DNSChallenge != nil && gc.ACME.TLSChallenge != nil {
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log.Warn("Unable to use DNS challenge and TLS challenge at the same time. Fallback to DNS challenge.")
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gc.ACME.TLSChallenge = nil
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}
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if gc.ACME.HTTPChallenge != nil && gc.ACME.TLSChallenge != nil {
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log.Warn("Unable to use HTTP challenge and TLS challenge at the same time. Fallback to TLS challenge.")
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gc.ACME.HTTPChallenge = nil
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}
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if len(gc.ACME.DNSProvider) > 0 {
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log.Warn("ACME.DNSProvider is deprecated, use ACME.DNSChallenge instead")
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gc.ACME.DNSChallenge = &acmeprovider.DNSChallenge{Provider: gc.ACME.DNSProvider, DelayBeforeCheck: gc.ACME.DelayDontCheckDNS}
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}
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if gc.ACME.OnDemand {
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log.Warn("ACME.OnDemand is deprecated")
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}
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}
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}
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// InitACMEProvider create an acme provider from the ACME part of globalConfiguration
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func (gc *GlobalConfiguration) InitACMEProvider() *acmeprovider.Provider {
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if gc.ACME != nil {
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// TODO: Remove when Provider ACME will replace totally ACME
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// If provider file, use Provider ACME instead of ACME
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if gc.Cluster == nil {
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provider := &acmeprovider.Provider{}
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provider.Configuration = &acmeprovider.Configuration{
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KeyType: gc.ACME.KeyType,
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OnHostRule: gc.ACME.OnHostRule,
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OnDemand: gc.ACME.OnDemand,
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Email: gc.ACME.Email,
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Storage: gc.ACME.Storage,
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HTTPChallenge: gc.ACME.HTTPChallenge,
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DNSChallenge: gc.ACME.DNSChallenge,
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TLSChallenge: gc.ACME.TLSChallenge,
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Domains: gc.ACME.Domains,
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ACMELogging: gc.ACME.ACMELogging,
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CAServer: gc.ACME.CAServer,
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EntryPoint: gc.ACME.EntryPoint,
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}
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store := acmeprovider.NewLocalStore(provider.Storage)
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provider.Store = store
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acme.ConvertToNewFormat(provider.Storage)
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gc.ACME = nil
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return provider
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}
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}
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return nil
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}
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func getSafeACMECAServer(caServerSrc string) string {
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if len(caServerSrc) == 0 {
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return DefaultAcmeCAServer
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}
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if strings.HasPrefix(caServerSrc, "https://acme-v01.api.letsencrypt.org") {
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caServer := strings.Replace(caServerSrc, "v01", "v02", 1)
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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)
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return caServer
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}
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if strings.HasPrefix(caServerSrc, "https://acme-staging.api.letsencrypt.org") {
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caServer := strings.Replace(caServerSrc, "https://acme-staging.api.letsencrypt.org", "https://acme-staging-v02.api.letsencrypt.org", 1)
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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)
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return caServer
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}
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return caServerSrc
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}
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// ValidateConfiguration validate that configuration is coherent
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func (gc *GlobalConfiguration) ValidateConfiguration() {
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if gc.ACME != nil {
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if _, ok := gc.EntryPoints[gc.ACME.EntryPoint]; !ok {
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log.Fatalf("Unknown entrypoint %q for ACME configuration", gc.ACME.EntryPoint)
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} else {
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if gc.EntryPoints[gc.ACME.EntryPoint].TLS == nil {
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log.Fatalf("Entrypoint %q has no TLS configuration for ACME configuration", gc.ACME.EntryPoint)
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}
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}
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}
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}
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// DefaultEntryPoints holds default entry points
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type DefaultEntryPoints []string
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// String is the method to format the flag's value, part of the flag.Value interface.
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// The String method's output will be used in diagnostics.
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func (dep *DefaultEntryPoints) String() string {
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return strings.Join(*dep, ",")
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}
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// Set is the method to set the flag value, part of the flag.Value interface.
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// Set's argument is a string to be parsed to set the flag.
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// It's a comma-separated list, so we split it.
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func (dep *DefaultEntryPoints) Set(value string) error {
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entrypoints := strings.Split(value, ",")
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if len(entrypoints) == 0 {
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return fmt.Errorf("bad DefaultEntryPoints format: %s", value)
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}
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for _, entrypoint := range entrypoints {
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*dep = append(*dep, entrypoint)
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}
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return nil
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}
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// Get return the EntryPoints map
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func (dep *DefaultEntryPoints) Get() interface{} {
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return *dep
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}
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// SetValue sets the EntryPoints map with val
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func (dep *DefaultEntryPoints) SetValue(val interface{}) {
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*dep = val.(DefaultEntryPoints)
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}
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// Type is type of the struct
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func (dep *DefaultEntryPoints) Type() string {
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return "defaultentrypoints"
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}
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// Retry contains request retry config
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type Retry struct {
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Attempts int `description:"Number of attempts" export:"true"`
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}
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// HealthCheckConfig contains health check configuration parameters.
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type HealthCheckConfig struct {
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Interval parse.Duration `description:"Default periodicity of enabled health checks" export:"true"`
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Timeout parse.Duration `description:"Default request timeout of enabled health checks" export:"true"`
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}
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// RespondingTimeouts contains timeout configurations for incoming requests to the Traefik instance.
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type RespondingTimeouts struct {
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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"`
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WriteTimeout parse.Duration `description:"WriteTimeout is the maximum duration before timing out writes of the response. If zero, no timeout is set" export:"true"`
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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"`
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}
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// ForwardingTimeouts contains timeout configurations for forwarding requests to the backend servers.
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type ForwardingTimeouts struct {
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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"`
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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"`
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}
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// LifeCycle contains configurations relevant to the lifecycle (such as the
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// shutdown phase) of Traefik.
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type LifeCycle struct {
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RequestAcceptGraceTimeout parse.Duration `description:"Duration to keep accepting requests before Traefik initiates the graceful shutdown procedure"`
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GraceTimeOut parse.Duration `description:"Duration to give active requests a chance to finish before Traefik stops"`
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}
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// HostResolverConfig contain configuration for CNAME Flattening
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type HostResolverConfig struct {
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CnameFlattening bool `description:"A flag to enable/disable CNAME flattening" export:"true"`
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ResolvConfig string `description:"resolv.conf used for DNS resolving" export:"true"`
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ResolvDepth int `description:"The maximal depth of DNS recursive resolving" export:"true"`
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}
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