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configuration.go
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configuration.go
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package configuration
import (
"crypto/tls"
"fmt"
"io/ioutil"
"os"
"strings"
"time"
"github.com/containous/flaeg"
"github.com/containous/traefik/acme"
"github.com/containous/traefik/log"
"github.com/containous/traefik/provider/boltdb"
"github.com/containous/traefik/provider/consul"
"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/web"
"github.com/containous/traefik/provider/zk"
"github.com/containous/traefik/types"
)
const (
// 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
)
// 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 {
GraceTimeOut flaeg.Duration `short:"g" description:"Duration to give active requests a chance to finish before Traefik stops" export:"true"`
Debug bool `short:"d" description:"Enable debug mode" export:"true"`
CheckNewVersion bool `description:"Periodically check if a new version has been released" export:"true"`
AccessLogsFile string `description:"(Deprecated) Access logs file" export:"true"` // Deprecated
AccessLog *types.AccessLog `description:"Access log settings" export:"true"`
TraefikLogsFile string `description:"Traefik logs file. Stdout is used when omitted or empty" 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 `description:"Enable clustering" export:"true"`
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 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"`
Docker *docker.Provider `description:"Enable Docker backend with default settings" export:"true"`
File *file.Provider `description:"Enable File backend with default settings" export:"true"`
Web *web.Provider `description:"Enable Web 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 *consul.CatalogProvider `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"`
}
// SetEffectiveConfiguration adds missing configuration parameters derived from existing ones.
// It also takes care of maintaining backwards compatibility.
func (gc *GlobalConfiguration) SetEffectiveConfiguration() {
if len(gc.EntryPoints) == 0 {
gc.EntryPoints = map[string]*EntryPoint{"http": {
Address: ":80",
ForwardedHeaders: &ForwardedHeaders{Insecure: true},
}}
gc.DefaultEntryPoints = []string{"http"}
}
// ForwardedHeaders must be remove in the next breaking version
for entryPointName := range gc.EntryPoints {
entryPoint := gc.EntryPoints[entryPointName]
if entryPoint.ForwardedHeaders == nil {
entryPoint.ForwardedHeaders = &ForwardedHeaders{Insecure: true}
}
}
if gc.Rancher != nil {
// 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.Debug {
gc.LogLevel = "DEBUG"
}
if gc.Web != nil && (gc.Web.Path == "" || !strings.HasSuffix(gc.Web.Path, "/")) {
gc.Web.Path += "/"
}
}
// 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 DefaultEntryPoints(*dep)
}
// SetValue sets the EntryPoints map with val
func (dep *DefaultEntryPoints) SetValue(val interface{}) {
*dep = DefaultEntryPoints(val.(DefaultEntryPoints))
}
// Type is type of the struct
func (dep *DefaultEntryPoints) Type() string {
return "defaultentrypoints"
}
// RootCAs hold the CA we want to have in root
type RootCAs []FileOrContent
// FileOrContent hold a file path or content
type FileOrContent string
func (f FileOrContent) String() string {
return string(f)
}
func (f FileOrContent) Read() ([]byte, error) {
var content []byte
if _, err := os.Stat(f.String()); err == nil {
content, err = ioutil.ReadFile(f.String())
if err != nil {
return nil, err
}
} else {
content = []byte(f)
}
return content, nil
}
// 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 (r *RootCAs) String() string {
sliceOfString := make([]string, len([]FileOrContent(*r)))
for key, value := range *r {
sliceOfString[key] = value.String()
}
return strings.Join(sliceOfString, ",")
}
// 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 (r *RootCAs) Set(value string) error {
rootCAs := strings.Split(value, ",")
if len(rootCAs) == 0 {
return fmt.Errorf("bad RootCAs format: %s", value)
}
for _, rootCA := range rootCAs {
*r = append(*r, FileOrContent(rootCA))
}
return nil
}
// Get return the EntryPoints map
func (r *RootCAs) Get() interface{} {
return RootCAs(*r)
}
// SetValue sets the EntryPoints map with val
func (r *RootCAs) SetValue(val interface{}) {
*r = RootCAs(val.(RootCAs))
}
// Type is type of the struct
func (r *RootCAs) Type() string {
return "rootcas"
}
// EntryPoints holds entry points configuration of the reverse proxy (ip, port, TLS...)
type EntryPoints map[string]*EntryPoint
// 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 (ep *EntryPoints) String() string {
return fmt.Sprintf("%+v", *ep)
}
// 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 (ep *EntryPoints) Set(value string) error {
result := parseEntryPointsConfiguration(value)
var configTLS *TLS
if len(result["tls"]) > 0 {
certs := Certificates{}
if err := certs.Set(result["tls"]); err != nil {
return err
}
configTLS = &TLS{
Certificates: certs,
}
} else if len(result["tls_acme"]) > 0 {
configTLS = &TLS{
Certificates: Certificates{},
}
}
if len(result["ca"]) > 0 {
files := strings.Split(result["ca"], ",")
configTLS.ClientCAFiles = files
}
var redirect *Redirect
if len(result["redirect_entrypoint"]) > 0 || len(result["redirect_regex"]) > 0 || len(result["redirect_replacement"]) > 0 {
redirect = &Redirect{
EntryPoint: result["redirect_entrypoint"],
Regex: result["redirect_regex"],
Replacement: result["redirect_replacement"],
}
}
whiteListSourceRange := []string{}
if len(result["whitelistsourcerange"]) > 0 {
whiteListSourceRange = strings.Split(result["whitelistsourcerange"], ",")
}
compress := toBool(result, "compress")
var proxyProtocol *ProxyProtocol
ppTrustedIPs := result["proxyprotocol_trustedips"]
if len(result["proxyprotocol_insecure"]) > 0 || len(ppTrustedIPs) > 0 {
proxyProtocol = &ProxyProtocol{
Insecure: toBool(result, "proxyprotocol_insecure"),
}
if len(ppTrustedIPs) > 0 {
proxyProtocol.TrustedIPs = strings.Split(ppTrustedIPs, ",")
}
}
// TODO must be changed to false by default in the next breaking version.
forwardedHeaders := &ForwardedHeaders{Insecure: true}
if _, ok := result["forwardedheaders_insecure"]; ok {
forwardedHeaders.Insecure = toBool(result, "forwardedheaders_insecure")
}
fhTrustedIPs := result["forwardedheaders_trustedips"]
if len(fhTrustedIPs) > 0 {
// TODO must be removed in the next breaking version.
forwardedHeaders.Insecure = toBool(result, "forwardedheaders_insecure")
forwardedHeaders.TrustedIPs = strings.Split(fhTrustedIPs, ",")
}
if proxyProtocol != nil && proxyProtocol.Insecure {
log.Warn("ProxyProtocol.Insecure:true is dangerous. Please use 'ProxyProtocol.TrustedIPs:IPs' and remove 'ProxyProtocol.Insecure:true'")
}
(*ep)[result["name"]] = &EntryPoint{
Address: result["address"],
TLS: configTLS,
Redirect: redirect,
Compress: compress,
WhitelistSourceRange: whiteListSourceRange,
ProxyProtocol: proxyProtocol,
ForwardedHeaders: forwardedHeaders,
}
return nil
}
func parseEntryPointsConfiguration(raw string) map[string]string {
sections := strings.Fields(raw)
config := make(map[string]string)
for _, part := range sections {
field := strings.SplitN(part, ":", 2)
name := strings.ToLower(strings.Replace(field[0], ".", "_", -1))
if len(field) > 1 {
config[name] = field[1]
} else {
if strings.EqualFold(name, "TLS") {
config["tls_acme"] = "TLS"
} else {
config[name] = ""
}
}
}
return config
}
func toBool(conf map[string]string, key string) bool {
if val, ok := conf[key]; ok {
return strings.EqualFold(val, "true") ||
strings.EqualFold(val, "enable") ||
strings.EqualFold(val, "on")
}
return false
}
// Get return the EntryPoints map
func (ep *EntryPoints) Get() interface{} {
return EntryPoints(*ep)
}
// SetValue sets the EntryPoints map with val
func (ep *EntryPoints) SetValue(val interface{}) {
*ep = EntryPoints(val.(EntryPoints))
}
// Type is type of the struct
func (ep *EntryPoints) Type() string {
return "entrypoints"
}
// EntryPoint holds an entry point configuration of the reverse proxy (ip, port, TLS...)
type EntryPoint struct {
Network string
Address string
TLS *TLS `export:"true"`
Redirect *Redirect `export:"true"`
Auth *types.Auth `export:"true"`
WhitelistSourceRange []string
Compress bool `export:"true"`
ProxyProtocol *ProxyProtocol `export:"true"`
ForwardedHeaders *ForwardedHeaders `export:"true"`
}
// Redirect configures a redirection of an entry point to another, or to an URL
type Redirect struct {
EntryPoint string
Regex string
Replacement string
}
// TLS configures TLS for an entry point
type TLS struct {
MinVersion string `export:"true"`
CipherSuites []string
Certificates Certificates
ClientCAFiles []string
}
// MinVersion Map of allowed TLS minimum versions
var MinVersion = map[string]uint16{
`VersionTLS10`: tls.VersionTLS10,
`VersionTLS11`: tls.VersionTLS11,
`VersionTLS12`: tls.VersionTLS12,
}
// CipherSuites Map of TLS CipherSuites from crypto/tls
// Available CipherSuites defined at https://golang.org/pkg/crypto/tls/#pkg-constants
var CipherSuites = map[string]uint16{
`TLS_RSA_WITH_RC4_128_SHA`: tls.TLS_RSA_WITH_RC4_128_SHA,
`TLS_RSA_WITH_3DES_EDE_CBC_SHA`: tls.TLS_RSA_WITH_3DES_EDE_CBC_SHA,
`TLS_RSA_WITH_AES_128_CBC_SHA`: tls.TLS_RSA_WITH_AES_128_CBC_SHA,
`TLS_RSA_WITH_AES_256_CBC_SHA`: tls.TLS_RSA_WITH_AES_256_CBC_SHA,
`TLS_RSA_WITH_AES_128_CBC_SHA256`: tls.TLS_RSA_WITH_AES_128_CBC_SHA256,
`TLS_RSA_WITH_AES_128_GCM_SHA256`: tls.TLS_RSA_WITH_AES_128_GCM_SHA256,
`TLS_RSA_WITH_AES_256_GCM_SHA384`: tls.TLS_RSA_WITH_AES_256_GCM_SHA384,
`TLS_ECDHE_ECDSA_WITH_RC4_128_SHA`: tls.TLS_ECDHE_ECDSA_WITH_RC4_128_SHA,
`TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA`: tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
`TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA`: tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
`TLS_ECDHE_RSA_WITH_RC4_128_SHA`: tls.TLS_ECDHE_RSA_WITH_RC4_128_SHA,
`TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA`: tls.TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,
`TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA`: tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
`TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA`: tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
`TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256`: tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,
`TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256`: tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,
`TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256`: tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
`TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256`: tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
`TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384`: tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
`TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384`: tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
`TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305`: tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
`TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305`: tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,
}
// Certificates defines traefik certificates type
// Certs and Keys could be either a file path, or the file content itself
type Certificates []Certificate
//CreateTLSConfig creates a TLS config from Certificate structures
func (certs *Certificates) CreateTLSConfig() (*tls.Config, error) {
config := &tls.Config{}
config.Certificates = []tls.Certificate{}
certsSlice := []Certificate(*certs)
for _, v := range certsSlice {
var err error
certContent, err := v.CertFile.Read()
if err != nil {
return nil, err
}
keyContent, err := v.KeyFile.Read()
if err != nil {
return nil, err
}
cert, err := tls.X509KeyPair(certContent, keyContent)
if err != nil {
return nil, err
}
config.Certificates = append(config.Certificates, cert)
}
return config, nil
}
// 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 (certs *Certificates) String() string {
if len(*certs) == 0 {
return ""
}
var result []string
for _, certificate := range *certs {
result = append(result, certificate.CertFile.String()+","+certificate.KeyFile.String())
}
return strings.Join(result, ";")
}
// 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 (certs *Certificates) Set(value string) error {
certificates := strings.Split(value, ";")
for _, certificate := range certificates {
files := strings.Split(certificate, ",")
if len(files) != 2 {
return fmt.Errorf("bad certificates format: %s", value)
}
*certs = append(*certs, Certificate{
CertFile: FileOrContent(files[0]),
KeyFile: FileOrContent(files[1]),
})
}
return nil
}
// Type is type of the struct
func (certs *Certificates) Type() string {
return "certificates"
}
// Certificate holds a SSL cert/key pair
// Certs and Key could be either a file path, or the file content itself
type Certificate struct {
CertFile FileOrContent
KeyFile FileOrContent
}
// 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"`
}
// ProxyProtocol contains Proxy-Protocol configuration
type ProxyProtocol struct {
Insecure bool
TrustedIPs []string
}
// ForwardedHeaders Trust client forwarding headers
type ForwardedHeaders struct {
Insecure bool
TrustedIPs []string
}