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config.go
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config.go
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package config
import (
"crypto/tls"
"flag"
"fmt"
"net/http"
"os"
"sort"
"strconv"
"strings"
"time"
"gopkg.in/yaml.v2"
log "github.com/sirupsen/logrus"
"github.com/prometheus/client_golang/prometheus"
"github.com/zalando/skipper"
"github.com/zalando/skipper/dataclients/kubernetes"
"github.com/zalando/skipper/eskip"
"github.com/zalando/skipper/filters/openpolicyagent"
"github.com/zalando/skipper/net"
"github.com/zalando/skipper/proxy"
"github.com/zalando/skipper/swarm"
)
type Config struct {
ConfigFile string
flags *flag.FlagSet
// generic:
Address string `yaml:"address"`
InsecureAddress string `yaml:"insecure-address"`
EnableTCPQueue bool `yaml:"enable-tcp-queue"`
ExpectedBytesPerRequest int `yaml:"expected-bytes-per-request"`
MaxTCPListenerConcurrency int `yaml:"max-tcp-listener-concurrency"`
MaxTCPListenerQueue int `yaml:"max-tcp-listener-queue"`
IgnoreTrailingSlash bool `yaml:"ignore-trailing-slash"`
Insecure bool `yaml:"insecure"`
ProxyPreserveHost bool `yaml:"proxy-preserve-host"`
DevMode bool `yaml:"dev-mode"`
SupportListener string `yaml:"support-listener"`
DebugListener string `yaml:"debug-listener"`
CertPathTLS string `yaml:"tls-cert"`
KeyPathTLS string `yaml:"tls-key"`
StatusChecks *listFlag `yaml:"status-checks"`
PrintVersion bool `yaml:"version"`
MaxLoopbacks int `yaml:"max-loopbacks"`
DefaultHTTPStatus int `yaml:"default-http-status"`
PluginDir string `yaml:"plugindir"`
LoadBalancerHealthCheckInterval time.Duration `yaml:"lb-healthcheck-interval"`
ReverseSourcePredicate bool `yaml:"reverse-source-predicate"`
RemoveHopHeaders bool `yaml:"remove-hop-headers"`
RfcPatchPath bool `yaml:"rfc-patch-path"`
MaxAuditBody int `yaml:"max-audit-body"`
MaxMatcherBufferSize uint64 `yaml:"max-matcher-buffer-size"`
EnableBreakers bool `yaml:"enable-breakers"`
Breakers breakerFlags `yaml:"breaker"`
EnableRatelimiters bool `yaml:"enable-ratelimits"`
Ratelimits ratelimitFlags `yaml:"ratelimits"`
EnableRouteFIFOMetrics bool `yaml:"enable-route-fifo-metrics"`
EnableRouteLIFOMetrics bool `yaml:"enable-route-lifo-metrics"`
MetricsFlavour *listFlag `yaml:"metrics-flavour"`
FilterPlugins *pluginFlag `yaml:"filter-plugin"`
PredicatePlugins *pluginFlag `yaml:"predicate-plugin"`
DataclientPlugins *pluginFlag `yaml:"dataclient-plugin"`
MultiPlugins *pluginFlag `yaml:"multi-plugin"`
CompressEncodings *listFlag `yaml:"compress-encodings"`
// logging, metrics, profiling, tracing:
EnablePrometheusMetrics bool `yaml:"enable-prometheus-metrics"`
OpenTracing string `yaml:"opentracing"`
OpenTracingInitialSpan string `yaml:"opentracing-initial-span"`
OpenTracingExcludedProxyTags string `yaml:"opentracing-excluded-proxy-tags"`
OpenTracingDisableFilterSpans bool `yaml:"opentracing-disable-filter-spans"`
OpentracingLogFilterLifecycleEvents bool `yaml:"opentracing-log-filter-lifecycle-events"`
OpentracingLogStreamEvents bool `yaml:"opentracing-log-stream-events"`
OpentracingBackendNameTag bool `yaml:"opentracing-backend-name-tag"`
MetricsListener string `yaml:"metrics-listener"`
MetricsPrefix string `yaml:"metrics-prefix"`
EnableProfile bool `yaml:"enable-profile"`
BlockProfileRate int `yaml:"block-profile-rate"`
MutexProfileFraction int `yaml:"mutex-profile-fraction"`
MemProfileRate int `yaml:"memory-profile-rate"`
DebugGcMetrics bool `yaml:"debug-gc-metrics"`
RuntimeMetrics bool `yaml:"runtime-metrics"`
ServeRouteMetrics bool `yaml:"serve-route-metrics"`
ServeRouteCounter bool `yaml:"serve-route-counter"`
ServeHostMetrics bool `yaml:"serve-host-metrics"`
ServeHostCounter bool `yaml:"serve-host-counter"`
ServeMethodMetric bool `yaml:"serve-method-metric"`
ServeStatusCodeMetric bool `yaml:"serve-status-code-metric"`
BackendHostMetrics bool `yaml:"backend-host-metrics"`
AllFiltersMetrics bool `yaml:"all-filters-metrics"`
CombinedResponseMetrics bool `yaml:"combined-response-metrics"`
RouteResponseMetrics bool `yaml:"route-response-metrics"`
RouteBackendErrorCounters bool `yaml:"route-backend-error-counters"`
RouteStreamErrorCounters bool `yaml:"route-stream-error-counters"`
RouteBackendMetrics bool `yaml:"route-backend-metrics"`
RouteCreationMetrics bool `yaml:"route-creation-metrics"`
MetricsUseExpDecaySample bool `yaml:"metrics-exp-decay-sample"`
HistogramMetricBucketsString string `yaml:"histogram-metric-buckets"`
HistogramMetricBuckets []float64 `yaml:"-"`
DisableMetricsCompat bool `yaml:"disable-metrics-compat"`
ApplicationLog string `yaml:"application-log"`
ApplicationLogLevel log.Level `yaml:"-"`
ApplicationLogLevelString string `yaml:"application-log-level"`
ApplicationLogPrefix string `yaml:"application-log-prefix"`
ApplicationLogJSONEnabled bool `yaml:"application-log-json-enabled"`
AccessLog string `yaml:"access-log"`
AccessLogDisabled bool `yaml:"access-log-disabled"`
AccessLogJSONEnabled bool `yaml:"access-log-json-enabled"`
AccessLogStripQuery bool `yaml:"access-log-strip-query"`
SuppressRouteUpdateLogs bool `yaml:"suppress-route-update-logs"`
// route sources:
EtcdUrls string `yaml:"etcd-urls"`
EtcdPrefix string `yaml:"etcd-prefix"`
EtcdTimeout time.Duration `yaml:"etcd-timeout"`
EtcdInsecure bool `yaml:"etcd-insecure"`
EtcdOAuthToken string `yaml:"etcd-oauth-token"`
EtcdUsername string `yaml:"etcd-username"`
EtcdPassword string `yaml:"etcd-password"`
RoutesFile string `yaml:"routes-file"`
RoutesURLs *listFlag `yaml:"routes-urls"`
InlineRoutes string `yaml:"inline-routes"`
AppendFilters *defaultFiltersFlags `yaml:"default-filters-append"`
PrependFilters *defaultFiltersFlags `yaml:"default-filters-prepend"`
DisabledFilters *listFlag `yaml:"disabled-filters"`
EditRoute routeChangerConfig `yaml:"edit-route"`
CloneRoute routeChangerConfig `yaml:"clone-route"`
SourcePollTimeout int64 `yaml:"source-poll-timeout"`
WaitFirstRouteLoad bool `yaml:"wait-first-route-load"`
// Forwarded headers
ForwardedHeadersList *listFlag `yaml:"forwarded-headers"`
ForwardedHeaders net.ForwardedHeaders `yaml:"-"`
ForwardedHeadersExcludeCIDRList *listFlag `yaml:"forwarded-headers-exclude-cidrs"`
ForwardedHeadersExcludeCIDRs net.IPNets `yaml:"-"`
// host patch:
NormalizeHost bool `yaml:"normalize-host"`
HostPatch net.HostPatch `yaml:"-"`
ValidateQuery bool `yaml:"validate-query"`
ValidateQueryLog bool `yaml:"validate-query-log"`
RefusePayload multiFlag `yaml:"refuse-payload"`
// Kubernetes:
KubernetesIngress bool `yaml:"kubernetes"`
KubernetesInCluster bool `yaml:"kubernetes-in-cluster"`
KubernetesURL string `yaml:"kubernetes-url"`
KubernetesTokenFile string `yaml:"kubernetes-token-file"`
KubernetesHealthcheck bool `yaml:"kubernetes-healthcheck"`
KubernetesHTTPSRedirect bool `yaml:"kubernetes-https-redirect"`
KubernetesHTTPSRedirectCode int `yaml:"kubernetes-https-redirect-code"`
KubernetesIngressClass string `yaml:"kubernetes-ingress-class"`
KubernetesRouteGroupClass string `yaml:"kubernetes-routegroup-class"`
WhitelistedHealthCheckCIDR string `yaml:"whitelisted-healthcheck-cidr"`
KubernetesPathModeString string `yaml:"kubernetes-path-mode"`
KubernetesPathMode kubernetes.PathMode `yaml:"-"`
KubernetesNamespace string `yaml:"kubernetes-namespace"`
KubernetesEnableEndpointSlices bool `yaml:"enable-kubernetes-endpointslices"`
KubernetesEnableEastWest bool `yaml:"enable-kubernetes-east-west"`
KubernetesEastWestDomain string `yaml:"kubernetes-east-west-domain"`
KubernetesEastWestRangeDomains *listFlag `yaml:"kubernetes-east-west-range-domains"`
KubernetesEastWestRangePredicatesString string `yaml:"kubernetes-east-west-range-predicates"`
KubernetesEastWestRangePredicates []*eskip.Predicate `yaml:"-"`
KubernetesOnlyAllowedExternalNames bool `yaml:"kubernetes-only-allowed-external-names"`
KubernetesAllowedExternalNames regexpListFlag `yaml:"kubernetes-allowed-external-names"`
KubernetesRedisServiceNamespace string `yaml:"kubernetes-redis-service-namespace"`
KubernetesRedisServiceName string `yaml:"kubernetes-redis-service-name"`
KubernetesRedisServicePort int `yaml:"kubernetes-redis-service-port"`
KubernetesBackendTrafficAlgorithmString string `yaml:"kubernetes-backend-traffic-algorithm"`
KubernetesBackendTrafficAlgorithm kubernetes.BackendTrafficAlgorithm `yaml:"-"`
KubernetesDefaultLoadBalancerAlgorithm string `yaml:"kubernetes-default-lb-algorithm"`
// Default filters
DefaultFiltersDir string `yaml:"default-filters-dir"`
// Auth:
EnableOAuth2GrantFlow bool `yaml:"enable-oauth2-grant-flow"`
Oauth2AuthURL string `yaml:"oauth2-auth-url"`
Oauth2TokenURL string `yaml:"oauth2-token-url"`
Oauth2RevokeTokenURL string `yaml:"oauth2-revoke-token-url"`
Oauth2TokeninfoURL string `yaml:"oauth2-tokeninfo-url"`
Oauth2TokeninfoTimeout time.Duration `yaml:"oauth2-tokeninfo-timeout"`
Oauth2TokeninfoCacheSize int `yaml:"oauth2-tokeninfo-cache-size"`
Oauth2TokeninfoCacheTTL time.Duration `yaml:"oauth2-tokeninfo-cache-ttl"`
Oauth2SecretFile string `yaml:"oauth2-secret-file"`
Oauth2ClientID string `yaml:"oauth2-client-id"`
Oauth2ClientSecret string `yaml:"oauth2-client-secret"`
Oauth2ClientIDFile string `yaml:"oauth2-client-id-file"`
Oauth2ClientSecretFile string `yaml:"oauth2-client-secret-file"`
Oauth2AuthURLParameters mapFlags `yaml:"oauth2-auth-url-parameters"`
Oauth2CallbackPath string `yaml:"oauth2-callback-path"`
Oauth2TokenintrospectionTimeout time.Duration `yaml:"oauth2-tokenintrospect-timeout"`
Oauth2AccessTokenHeaderName string `yaml:"oauth2-access-token-header-name"`
Oauth2TokeninfoSubjectKey string `yaml:"oauth2-tokeninfo-subject-key"`
Oauth2GrantTokeninfoKeys *listFlag `yaml:"oauth2-grant-tokeninfo-keys"`
Oauth2TokenCookieName string `yaml:"oauth2-token-cookie-name"`
Oauth2TokenCookieRemoveSubdomains int `yaml:"oauth2-token-cookie-remove-subdomains"`
Oauth2GrantInsecure bool `yaml:"oauth2-grant-insecure"`
WebhookTimeout time.Duration `yaml:"webhook-timeout"`
OidcSecretsFile string `yaml:"oidc-secrets-file"`
OIDCCookieValidity time.Duration `yaml:"oidc-cookie-validity"`
OidcDistributedClaimsTimeout time.Duration `yaml:"oidc-distributed-claims-timeout"`
CredentialPaths *listFlag `yaml:"credentials-paths"`
CredentialsUpdateInterval time.Duration `yaml:"credentials-update-interval"`
// TLS client certs
ClientKeyFile string `yaml:"client-tls-key"`
ClientCertFile string `yaml:"client-tls-cert"`
Certificates []tls.Certificate `yaml:"-"`
// TLS version
TLSMinVersion string `yaml:"tls-min-version"`
// TLS Config
KubernetesEnableTLS bool `yaml:"kubernetes-enable-tls"`
// API Monitoring
ApiUsageMonitoringEnable bool `yaml:"enable-api-usage-monitoring"`
ApiUsageMonitoringRealmKeys string `yaml:"api-usage-monitoring-realm-keys"`
ApiUsageMonitoringClientKeys string `yaml:"api-usage-monitoring-client-keys"`
ApiUsageMonitoringDefaultClientTrackingPattern string `yaml:"api-usage-monitoring-default-client-tracking-pattern"`
ApiUsageMonitoringRealmsTrackingPattern string `yaml:"api-usage-monitoring-realms-tracking-pattern"`
// connections, timeouts:
WaitForHealthcheckInterval time.Duration `yaml:"wait-for-healthcheck-interval"`
IdleConnsPerHost int `yaml:"idle-conns-num"`
CloseIdleConnsPeriod time.Duration `yaml:"close-idle-conns-period"`
BackendFlushInterval time.Duration `yaml:"backend-flush-interval"`
ExperimentalUpgrade bool `yaml:"experimental-upgrade"`
ExperimentalUpgradeAudit bool `yaml:"experimental-upgrade-audit"`
ReadTimeoutServer time.Duration `yaml:"read-timeout-server"`
ReadHeaderTimeoutServer time.Duration `yaml:"read-header-timeout-server"`
WriteTimeoutServer time.Duration `yaml:"write-timeout-server"`
IdleTimeoutServer time.Duration `yaml:"idle-timeout-server"`
MaxHeaderBytes int `yaml:"max-header-bytes"`
EnableConnMetricsServer bool `yaml:"enable-connection-metrics"`
TimeoutBackend time.Duration `yaml:"timeout-backend"`
KeepaliveBackend time.Duration `yaml:"keepalive-backend"`
EnableDualstackBackend bool `yaml:"enable-dualstack-backend"`
TlsHandshakeTimeoutBackend time.Duration `yaml:"tls-timeout-backend"`
ResponseHeaderTimeoutBackend time.Duration `yaml:"response-header-timeout-backend"`
ExpectContinueTimeoutBackend time.Duration `yaml:"expect-continue-timeout-backend"`
MaxIdleConnsBackend int `yaml:"max-idle-connection-backend"`
DisableHTTPKeepalives bool `yaml:"disable-http-keepalives"`
// swarm:
EnableSwarm bool `yaml:"enable-swarm"`
// redis based
SwarmRedisURLs *listFlag `yaml:"swarm-redis-urls"`
SwarmRedisPassword string `yaml:"swarm-redis-password"`
SwarmRedisHashAlgorithm string `yaml:"swarm-redis-hash-algorithm"`
SwarmRedisDialTimeout time.Duration `yaml:"swarm-redis-dial-timeout"`
SwarmRedisReadTimeout time.Duration `yaml:"swarm-redis-read-timeout"`
SwarmRedisWriteTimeout time.Duration `yaml:"swarm-redis-write-timeout"`
SwarmRedisPoolTimeout time.Duration `yaml:"swarm-redis-pool-timeout"`
SwarmRedisMinConns int `yaml:"swarm-redis-min-conns"`
SwarmRedisMaxConns int `yaml:"swarm-redis-max-conns"`
SwarmRedisEndpointsRemoteURL string `yaml:"swarm-redis-remote"`
// swim based
SwarmKubernetesNamespace string `yaml:"swarm-namespace"`
SwarmKubernetesLabelSelectorKey string `yaml:"swarm-label-selector-key"`
SwarmKubernetesLabelSelectorValue string `yaml:"swarm-label-selector-value"`
SwarmPort int `yaml:"swarm-port"`
SwarmMaxMessageBuffer int `yaml:"swarm-max-msg-buffer"`
SwarmLeaveTimeout time.Duration `yaml:"swarm-leave-timeout"`
SwarmStaticSelf string `yaml:"swarm-static-self"`
SwarmStaticOther string `yaml:"swarm-static-other"`
ClusterRatelimitMaxGroupShards int `yaml:"cluster-ratelimit-max-group-shards"`
LuaModules *listFlag `yaml:"lua-modules"`
LuaSources *listFlag `yaml:"lua-sources"`
EnableOpenPolicyAgent bool `yaml:"enable-open-policy-agent"`
OpenPolicyAgentConfigTemplate string `yaml:"open-policy-agent-config-template"`
OpenPolicyAgentEnvoyMetadata string `yaml:"open-policy-agent-envoy-metadata"`
OpenPolicyAgentCleanerInterval time.Duration `yaml:"open-policy-agent-cleaner-interval"`
}
const (
// TLS
defaultMinTLSVersion = "1.2"
// environment keys:
redisPasswordEnv = "SWARM_REDIS_PASSWORD"
)
func NewConfig() *Config {
cfg := new(Config)
cfg.MetricsFlavour = commaListFlag("codahale", "prometheus")
cfg.StatusChecks = commaListFlag()
cfg.FilterPlugins = newPluginFlag()
cfg.PredicatePlugins = newPluginFlag()
cfg.DataclientPlugins = newPluginFlag()
cfg.MultiPlugins = newPluginFlag()
cfg.CredentialPaths = commaListFlag()
cfg.SwarmRedisURLs = commaListFlag()
cfg.AppendFilters = &defaultFiltersFlags{}
cfg.PrependFilters = &defaultFiltersFlags{}
cfg.DisabledFilters = commaListFlag()
cfg.CloneRoute = routeChangerConfig{}
cfg.EditRoute = routeChangerConfig{}
cfg.KubernetesEastWestRangeDomains = commaListFlag()
cfg.RoutesURLs = commaListFlag()
cfg.ForwardedHeadersList = commaListFlag()
cfg.ForwardedHeadersExcludeCIDRList = commaListFlag()
cfg.CompressEncodings = commaListFlag("gzip", "deflate", "br")
cfg.LuaModules = commaListFlag()
cfg.LuaSources = commaListFlag()
cfg.Oauth2GrantTokeninfoKeys = commaListFlag()
flag := flag.NewFlagSet("", flag.ExitOnError)
flag.StringVar(&cfg.ConfigFile, "config-file", "", "if provided the flags will be loaded/overwritten by the values on the file (yaml)")
// generic:
flag.StringVar(&cfg.Address, "address", ":9090", "network address that skipper should listen on")
flag.StringVar(&cfg.InsecureAddress, "insecure-address", "", "insecure network address that skipper should listen on when TLS is enabled")
flag.BoolVar(&cfg.EnableTCPQueue, "enable-tcp-queue", false, "enable the TCP listener queue")
flag.IntVar(&cfg.ExpectedBytesPerRequest, "expected-bytes-per-request", 50*1024, "bytes per request, that is used to calculate concurrency limits to buffer connection spikes")
flag.IntVar(&cfg.MaxTCPListenerConcurrency, "max-tcp-listener-concurrency", 0, "sets hardcoded max for TCP listener concurrency, normally calculated based on available memory cgroups with max TODO")
flag.IntVar(&cfg.MaxTCPListenerQueue, "max-tcp-listener-queue", 0, "sets hardcoded max queue size for TCP listener, normally calculated 10x concurrency with max TODO:50k")
flag.BoolVar(&cfg.IgnoreTrailingSlash, "ignore-trailing-slash", false, "flag indicating to ignore trailing slashes in paths when routing")
flag.BoolVar(&cfg.Insecure, "insecure", false, "flag indicating to ignore the verification of the TLS certificates of the backend services")
flag.BoolVar(&cfg.ProxyPreserveHost, "proxy-preserve-host", false, "flag indicating to preserve the incoming request 'Host' header in the outgoing requests")
flag.BoolVar(&cfg.DevMode, "dev-mode", false, "enables developer time behavior, like ubuffered routing updates")
flag.StringVar(&cfg.SupportListener, "support-listener", ":9911", "network address used for exposing the /metrics endpoint. An empty value disables support endpoint.")
flag.StringVar(&cfg.DebugListener, "debug-listener", "", "when this address is set, skipper starts an additional listener returning the original and transformed requests")
flag.StringVar(&cfg.CertPathTLS, "tls-cert", "", "the path on the local filesystem to the certificate file(s) (including any intermediates), multiple may be given comma separated")
flag.StringVar(&cfg.KeyPathTLS, "tls-key", "", "the path on the local filesystem to the certificate's private key file(s), multiple keys may be given comma separated - the order must match the certs")
flag.Var(cfg.StatusChecks, "status-checks", "experimental URLs to check before reporting healthy on startup")
flag.BoolVar(&cfg.PrintVersion, "version", false, "print Skipper version")
flag.IntVar(&cfg.MaxLoopbacks, "max-loopbacks", proxy.DefaultMaxLoopbacks, "maximum number of loopbacks for an incoming request, set to -1 to disable loopbacks")
flag.IntVar(&cfg.DefaultHTTPStatus, "default-http-status", http.StatusNotFound, "default HTTP status used when no route is found for a request")
flag.StringVar(&cfg.PluginDir, "plugindir", "", "set the directory to load plugins from, default is ./")
flag.DurationVar(&cfg.LoadBalancerHealthCheckInterval, "lb-healthcheck-interval", 0, "use to set the health checker interval to check healthiness of former dead or unhealthy routes")
flag.BoolVar(&cfg.ReverseSourcePredicate, "reverse-source-predicate", false, "reverse the order of finding the client IP from X-Forwarded-For header")
flag.BoolVar(&cfg.RemoveHopHeaders, "remove-hop-headers", false, "enables removal of Hop-Headers according to RFC-2616")
flag.BoolVar(&cfg.RfcPatchPath, "rfc-patch-path", false, "patches the incoming request path to preserve uncoded reserved characters according to RFC 2616 and RFC 3986")
flag.IntVar(&cfg.MaxAuditBody, "max-audit-body", 1024, "sets the max body to read to log in the audit log body")
flag.Uint64Var(&cfg.MaxMatcherBufferSize, "max-matcher-buffer-size", 2097152, "sets the maximum read size of the body read by the block filter, default is 2MiB")
flag.BoolVar(&cfg.EnableBreakers, "enable-breakers", false, enableBreakersUsage)
flag.Var(&cfg.Breakers, "breaker", breakerUsage)
flag.BoolVar(&cfg.EnableRatelimiters, "enable-ratelimits", false, enableRatelimitsUsage)
flag.Var(&cfg.Ratelimits, "ratelimits", ratelimitsUsage)
flag.BoolVar(&cfg.EnableRouteFIFOMetrics, "enable-route-fifo-metrics", false, "enable metrics for the individual route FIFO queues")
flag.BoolVar(&cfg.EnableRouteLIFOMetrics, "enable-route-lifo-metrics", false, "enable metrics for the individual route LIFO queues")
flag.Var(cfg.MetricsFlavour, "metrics-flavour", "Metrics flavour is used to change the exposed metrics format. Supported metric formats: 'codahale' and 'prometheus', you can select both of them")
flag.Var(cfg.FilterPlugins, "filter-plugin", "set a custom filter plugins to load, a comma separated list of name and arguments")
flag.Var(cfg.PredicatePlugins, "predicate-plugin", "set a custom predicate plugins to load, a comma separated list of name and arguments")
flag.Var(cfg.DataclientPlugins, "dataclient-plugin", "set a custom dataclient plugins to load, a comma separated list of name and arguments")
flag.Var(cfg.MultiPlugins, "multi-plugin", "set a custom multitype plugins to load, a comma separated list of name and arguments")
flag.Var(cfg.CompressEncodings, "compress-encodings", "set encodings supported for compression, the order defines priority when Accept-Header has equal quality values, see RFC 7231 section 5.3.1")
// logging, metrics, tracing:
flag.BoolVar(&cfg.EnablePrometheusMetrics, "enable-prometheus-metrics", false, "*Deprecated*: use metrics-flavour. Switch to Prometheus metrics format to expose metrics")
flag.StringVar(&cfg.OpenTracing, "opentracing", "noop", "list of arguments for opentracing (space separated), first argument is the tracer implementation")
flag.StringVar(&cfg.OpenTracingInitialSpan, "opentracing-initial-span", "ingress", "set the name of the initial, pre-routing, tracing span")
flag.StringVar(&cfg.OpenTracingExcludedProxyTags, "opentracing-excluded-proxy-tags", "", "set tags that should be excluded from spans created for proxy operation. must be a comma-separated list of strings.")
flag.BoolVar(&cfg.OpenTracingDisableFilterSpans, "opentracing-disable-filter-spans", false, "disable creation of spans representing request and response filters")
flag.BoolVar(&cfg.OpentracingLogFilterLifecycleEvents, "opentracing-log-filter-lifecycle-events", true, "enables the logs for request & response filters' lifecycle events that are marking start & end times.")
flag.BoolVar(&cfg.OpentracingLogStreamEvents, "opentracing-log-stream-events", true, "enables the logs for events marking the times response headers & payload are streamed to the client")
flag.BoolVar(&cfg.OpentracingBackendNameTag, "opentracing-backend-name-tag", false, "enables an additional tracing tag that contains a backend name for a route when it's available (e.g. for RouteGroups) (default false)")
flag.StringVar(&cfg.MetricsListener, "metrics-listener", ":9911", "network address used for exposing the /metrics endpoint. An empty value disables metrics iff support listener is also empty.")
flag.StringVar(&cfg.MetricsPrefix, "metrics-prefix", "skipper.", "allows setting a custom path prefix for metrics export")
flag.BoolVar(&cfg.EnableProfile, "enable-profile", false, "enable profile information on the metrics endpoint with path /pprof")
flag.IntVar(&cfg.BlockProfileRate, "block-profile-rate", 0, "block profile sample rate, see runtime.SetBlockProfileRate")
flag.IntVar(&cfg.MutexProfileFraction, "mutex-profile-fraction", 0, "mutex profile fraction rate, see runtime.SetMutexProfileFraction")
flag.IntVar(&cfg.MemProfileRate, "memory-profile-rate", 0, "memory profile rate, see runtime.SetMemProfileRate, keeps default 512 kB")
flag.BoolVar(&cfg.DebugGcMetrics, "debug-gc-metrics", false, "enables reporting of the Go garbage collector statistics exported in debug.GCStats")
flag.BoolVar(&cfg.RuntimeMetrics, "runtime-metrics", true, "enables reporting of the Go runtime statistics exported in runtime and specifically runtime.MemStats")
flag.BoolVar(&cfg.ServeRouteMetrics, "serve-route-metrics", false, "enables reporting total serve time metrics for each route")
flag.BoolVar(&cfg.ServeRouteCounter, "serve-route-counter", false, "enables reporting counting metrics for each route. Has the route, HTTP method and status code as labels. Currently just implemented for the Prometheus metrics flavour")
flag.BoolVar(&cfg.ServeHostMetrics, "serve-host-metrics", false, "enables reporting total serve time metrics for each host")
flag.BoolVar(&cfg.ServeHostCounter, "serve-host-counter", false, "enables reporting counting metrics for each host. Has the route, HTTP method and status code as labels. Currently just implemented for the Prometheus metrics flavour")
flag.BoolVar(&cfg.ServeMethodMetric, "serve-method-metric", true, "enables the HTTP method as a domain of the total serve time metric. It affects both route and host split metrics")
flag.BoolVar(&cfg.ServeStatusCodeMetric, "serve-status-code-metric", true, "enables the HTTP response status code as a domain of the total serve time metric. It affects both route and host split metrics")
flag.BoolVar(&cfg.BackendHostMetrics, "backend-host-metrics", false, "enables reporting total serve time metrics for each backend")
flag.BoolVar(&cfg.AllFiltersMetrics, "all-filters-metrics", false, "enables reporting combined filter metrics for each route")
flag.BoolVar(&cfg.CombinedResponseMetrics, "combined-response-metrics", false, "enables reporting combined response time metrics")
flag.BoolVar(&cfg.RouteResponseMetrics, "route-response-metrics", false, "enables reporting response time metrics for each route")
flag.BoolVar(&cfg.RouteBackendErrorCounters, "route-backend-error-counters", false, "enables counting backend errors for each route")
flag.BoolVar(&cfg.RouteStreamErrorCounters, "route-stream-error-counters", false, "enables counting streaming errors for each route")
flag.BoolVar(&cfg.RouteBackendMetrics, "route-backend-metrics", false, "enables reporting backend response time metrics for each route")
flag.BoolVar(&cfg.RouteCreationMetrics, "route-creation-metrics", false, "enables reporting for route creation times")
flag.BoolVar(&cfg.MetricsUseExpDecaySample, "metrics-exp-decay-sample", false, "use exponentially decaying sample in metrics")
flag.StringVar(&cfg.HistogramMetricBucketsString, "histogram-metric-buckets", "", "use custom buckets for prometheus histograms, must be a comma-separated list of numbers")
flag.BoolVar(&cfg.DisableMetricsCompat, "disable-metrics-compat", false, "disables the default true value for all-filters-metrics, route-response-metrics, route-backend-errorCounters and route-stream-error-counters")
flag.StringVar(&cfg.ApplicationLog, "application-log", "", "output file for the application log. When not set, /dev/stderr is used")
flag.StringVar(&cfg.ApplicationLogLevelString, "application-log-level", "INFO", "log level for application logs, possible values: PANIC, FATAL, ERROR, WARN, INFO, DEBUG")
flag.StringVar(&cfg.ApplicationLogPrefix, "application-log-prefix", "[APP]", "prefix for each log entry")
flag.BoolVar(&cfg.ApplicationLogJSONEnabled, "application-log-json-enabled", false, "when this flag is set, log in JSON format is used")
flag.StringVar(&cfg.AccessLog, "access-log", "", "output file for the access log, When not set, /dev/stderr is used")
flag.BoolVar(&cfg.AccessLogDisabled, "access-log-disabled", false, "when this flag is set, no access log is printed")
flag.BoolVar(&cfg.AccessLogJSONEnabled, "access-log-json-enabled", false, "when this flag is set, log in JSON format is used")
flag.BoolVar(&cfg.AccessLogStripQuery, "access-log-strip-query", false, "when this flag is set, the access log strips the query strings from the access log")
flag.BoolVar(&cfg.SuppressRouteUpdateLogs, "suppress-route-update-logs", false, "print only summaries on route updates/deletes")
// route sources:
flag.StringVar(&cfg.EtcdUrls, "etcd-urls", "", "urls of nodes in an etcd cluster, storing route definitions")
flag.StringVar(&cfg.EtcdPrefix, "etcd-prefix", "/skipper", "path prefix for skipper related data in etcd")
flag.DurationVar(&cfg.EtcdTimeout, "etcd-timeout", time.Second, "http client timeout duration for etcd")
flag.BoolVar(&cfg.EtcdInsecure, "etcd-insecure", false, "ignore the verification of TLS certificates for etcd")
flag.StringVar(&cfg.EtcdOAuthToken, "etcd-oauth-token", "", "optional token for OAuth authentication with etcd")
flag.StringVar(&cfg.EtcdUsername, "etcd-username", "", "optional username for basic authentication with etcd")
flag.StringVar(&cfg.EtcdPassword, "etcd-password", "", "optional password for basic authentication with etcd")
flag.StringVar(&cfg.RoutesFile, "routes-file", "", "file containing route definitions")
flag.Var(cfg.RoutesURLs, "routes-urls", "comma separated URLs to route definitions in eskip format")
flag.StringVar(&cfg.InlineRoutes, "inline-routes", "", "inline routes in eskip format")
flag.Int64Var(&cfg.SourcePollTimeout, "source-poll-timeout", int64(3000), "polling timeout of the routing data sources, in milliseconds")
flag.Var(cfg.AppendFilters, "default-filters-append", "set of default filters to apply to append to all filters of all routes")
flag.Var(cfg.PrependFilters, "default-filters-prepend", "set of default filters to apply to prepend to all filters of all routes")
flag.Var(cfg.DisabledFilters, "disabled-filters", "comma separated list of filters unavailable for use")
flag.Var(&cfg.EditRoute, "edit-route", "match and edit filters and predicates of all routes")
flag.Var(&cfg.CloneRoute, "clone-route", "clone all matching routes and replace filters and predicates of all matched routes")
flag.BoolVar(&cfg.WaitFirstRouteLoad, "wait-first-route-load", false, "prevent starting the listener before the first batch of routes were loaded")
// Forwarded headers
flag.Var(cfg.ForwardedHeadersList, "forwarded-headers", "comma separated list of headers to add to the incoming request before routing\n"+
"X-Forwarded-For sets or appends with comma the remote IP of the request to the X-Forwarded-For header value\n"+
"X-Forwarded-Host sets X-Forwarded-Host value to the request host\n"+
"X-Forwarded-Method sets X-Forwarded-Method value to the request method\n"+
"X-Forwarded-Uri sets X-Forwarded-Uri value to the requestURI\n"+
"X-Forwarded-Port=<port> sets X-Forwarded-Port value\n"+
"X-Forwarded-Proto=<http|https> sets X-Forwarded-Proto value")
flag.Var(cfg.ForwardedHeadersExcludeCIDRList, "forwarded-headers-exclude-cidrs", "disables addition of forwarded headers for the remote host IPs from the comma separated list of CIDRs")
flag.BoolVar(&cfg.NormalizeHost, "normalize-host", false, "converts request host to lowercase and removes port and trailing dot if any")
flag.BoolVar(&cfg.ValidateQuery, "validate-query", true, "Validates the HTTP Query of a request and if invalid responds with status code 400")
flag.BoolVar(&cfg.ValidateQueryLog, "validate-query-log", true, "Enable looging for validate query logs")
flag.Var(&cfg.RefusePayload, "refuse-payload", "refuse requests that match configured value. Can be set multiple times")
// Kubernetes:
flag.BoolVar(&cfg.KubernetesIngress, "kubernetes", false, "enables skipper to generate routes for ingress resources in kubernetes cluster. Enables -normalize-host")
flag.BoolVar(&cfg.KubernetesInCluster, "kubernetes-in-cluster", false, "specify if skipper is running inside kubernetes cluster. It will automatically discover API server URL and service account token")
flag.StringVar(&cfg.KubernetesURL, "kubernetes-url", "", "kubernetes API server URL, ignored if kubernetes-in-cluster is set to true")
flag.StringVar(&cfg.KubernetesTokenFile, "kubernetes-token-file", "", "kubernetes token file path, ignored if kubernetes-in-cluster is set to true")
flag.BoolVar(&cfg.KubernetesHealthcheck, "kubernetes-healthcheck", true, "automatic healthcheck route for internal IPs with path /kube-system/healthz; valid only with kubernetes")
flag.BoolVar(&cfg.KubernetesHTTPSRedirect, "kubernetes-https-redirect", true, "automatic HTTP->HTTPS redirect route; valid only with kubernetes")
flag.IntVar(&cfg.KubernetesHTTPSRedirectCode, "kubernetes-https-redirect-code", 308, "overrides the default redirect code (308) when used together with -kubernetes-https-redirect")
flag.StringVar(&cfg.KubernetesIngressClass, "kubernetes-ingress-class", "", "ingress class regular expression used to filter ingress resources for kubernetes")
flag.StringVar(&cfg.KubernetesRouteGroupClass, "kubernetes-routegroup-class", "", "route group class regular expression used to filter route group resources for kubernetes")
flag.StringVar(&cfg.WhitelistedHealthCheckCIDR, "whitelisted-healthcheck-cidr", "", "sets the iprange/CIDRS to be whitelisted during healthcheck")
flag.StringVar(&cfg.KubernetesPathModeString, "kubernetes-path-mode", "kubernetes-ingress", "controls the default interpretation of Kubernetes ingress paths: <kubernetes-ingress|path-regexp|path-prefix>")
flag.StringVar(&cfg.KubernetesNamespace, "kubernetes-namespace", "", "watch only this namespace for ingresses")
flag.BoolVar(&cfg.KubernetesEnableEndpointSlices, "enable-kubernetes-endpointslices", false, "Enables that skipper fetches Kubernetes endpointslices instead of endpoints to scale more than 1000 pods within a service")
flag.BoolVar(&cfg.KubernetesEnableEastWest, "enable-kubernetes-east-west", false, "*Deprecated*: use kubernetes-east-west-range feature. Enables east-west communication, which automatically adds routes for Ingress objects with hostname <name>.<namespace>.skipper.cluster.local")
flag.StringVar(&cfg.KubernetesEastWestDomain, "kubernetes-east-west-domain", "", "*Deprecated*: use kubernetes-east-west-range feature. Sets the east-west domain, defaults to .skipper.cluster.local")
flag.Var(cfg.KubernetesEastWestRangeDomains, "kubernetes-east-west-range-domains", "set the the cluster internal domains for east west traffic. Identified routes to such domains will include the -kubernetes-east-west-range-predicates")
flag.StringVar(&cfg.KubernetesEastWestRangePredicatesString, "kubernetes-east-west-range-predicates", "", "set the predicates that will be appended to routes identified as to -kubernetes-east-west-range-domains")
flag.BoolVar(&cfg.KubernetesOnlyAllowedExternalNames, "kubernetes-only-allowed-external-names", false, "only accept external name services, route group network backends and route group explicit LB endpoints from an allow list defined by zero or more -kubernetes-allowed-external-name flags")
flag.Var(&cfg.KubernetesAllowedExternalNames, "kubernetes-allowed-external-name", "set zero or more regular expressions from which at least one should be matched by the external name services, route group network addresses and explicit endpoints domain names")
flag.StringVar(&cfg.KubernetesRedisServiceNamespace, "kubernetes-redis-service-namespace", "", "Sets namespace for redis to be used to lookup endpoints")
flag.StringVar(&cfg.KubernetesRedisServiceName, "kubernetes-redis-service-name", "", "Sets name for redis to be used to lookup endpoints")
flag.IntVar(&cfg.KubernetesRedisServicePort, "kubernetes-redis-service-port", 6379, "Sets the port for redis to be used to lookup endpoints")
flag.StringVar(&cfg.KubernetesBackendTrafficAlgorithmString, "kubernetes-backend-traffic-algorithm", kubernetes.TrafficPredicateAlgorithm.String(), "sets the algorithm to be used for traffic splitting between backends: traffic-predicate or traffic-segment-predicate")
flag.StringVar(&cfg.KubernetesDefaultLoadBalancerAlgorithm, "kubernetes-default-lb-algorithm", kubernetes.DefaultLoadBalancerAlgorithm, "sets the default algorithm to be used for load balancing between backend endpoints, available options: roundRobin, consistentHash, random, powerOfRandomNChoices")
// Auth:
flag.BoolVar(&cfg.EnableOAuth2GrantFlow, "enable-oauth2-grant-flow", false, "enables OAuth2 Grant Flow filter")
flag.StringVar(&cfg.Oauth2AuthURL, "oauth2-auth-url", "", "sets the OAuth2 Auth URL to redirect the requests to when login is required")
flag.StringVar(&cfg.Oauth2TokenURL, "oauth2-token-url", "", "the url where the access code should be exchanged for the access token")
flag.StringVar(&cfg.Oauth2RevokeTokenURL, "oauth2-revoke-token-url", "", "the url where the access and refresh tokens can be revoked when logging out")
flag.StringVar(&cfg.Oauth2TokeninfoURL, "oauth2-tokeninfo-url", "", "sets the default tokeninfo URL to query information about an incoming OAuth2 token in oauth2Tokeninfo filters")
flag.StringVar(&cfg.Oauth2SecretFile, "oauth2-secret-file", "", "sets the filename with the encryption key for the authentication cookie and grant flow state stored in secrets registry")
flag.StringVar(&cfg.Oauth2ClientID, "oauth2-client-id", "", "sets the OAuth2 client id of the current service, used to exchange the access code")
flag.StringVar(&cfg.Oauth2ClientSecret, "oauth2-client-secret", "", "sets the OAuth2 client secret associated with the oauth2-client-id, used to exchange the access code")
flag.StringVar(&cfg.Oauth2ClientIDFile, "oauth2-client-id-file", "", "sets the path of the file containing the OAuth2 client id of the current service, used to exchange the access code. "+
"File name may contain {host} placeholder which will be replaced by the request host")
flag.StringVar(&cfg.Oauth2ClientSecretFile, "oauth2-client-secret-file", "", "sets the path of the file containing the OAuth2 client secret associated with the oauth2-client-id, used to exchange the access code. "+
"File name may contain {host} placeholder which will be replaced by the request host")
flag.StringVar(&cfg.Oauth2CallbackPath, "oauth2-callback-path", "", "sets the path where the OAuth2 callback requests with the authorization code should be redirected to")
flag.DurationVar(&cfg.Oauth2TokeninfoTimeout, "oauth2-tokeninfo-timeout", 2*time.Second, "sets the default tokeninfo request timeout duration to 2000ms")
flag.IntVar(&cfg.Oauth2TokeninfoCacheSize, "oauth2-tokeninfo-cache-size", 0, "non-zero value enables tokeninfo cache and sets the maximum number of cached tokens")
flag.DurationVar(&cfg.Oauth2TokeninfoCacheTTL, "oauth2-tokeninfo-cache-ttl", 0, "non-zero value limits the lifetime of a cached tokeninfo which otherwise equals to the tokeninfo 'expires_in' field value")
flag.DurationVar(&cfg.Oauth2TokenintrospectionTimeout, "oauth2-tokenintrospect-timeout", 2*time.Second, "sets the default tokenintrospection request timeout duration to 2000ms")
flag.Var(&cfg.Oauth2AuthURLParameters, "oauth2-auth-url-parameters", "sets additional parameters to send when calling the OAuth2 authorize or token endpoints as key-value pairs")
flag.StringVar(&cfg.Oauth2AccessTokenHeaderName, "oauth2-access-token-header-name", "", "sets the access token to a header on the request with this name")
flag.StringVar(&cfg.Oauth2TokeninfoSubjectKey, "oauth2-tokeninfo-subject-key", "uid", "sets the tokeninfo subject key")
flag.Var(cfg.Oauth2GrantTokeninfoKeys, "oauth2-grant-tokeninfo-keys", "non-empty comma separated list configures keys to preserve in OAuth2 Grant Flow tokeninfo")
flag.StringVar(&cfg.Oauth2TokenCookieName, "oauth2-token-cookie-name", "oauth2-grant", "sets the name of the cookie where the encrypted token is stored")
flag.IntVar(&cfg.Oauth2TokenCookieRemoveSubdomains, "oauth2-token-cookie-remove-subdomains", 1, "sets the number of subdomains to remove from the callback request hostname to obtain token cookie domain")
flag.BoolVar(&cfg.Oauth2GrantInsecure, "oauth2-grant-insecure", false, "omits Secure attribute of the token cookie and uses http scheme for callback url")
flag.DurationVar(&cfg.WebhookTimeout, "webhook-timeout", 2*time.Second, "sets the webhook request timeout duration")
flag.StringVar(&cfg.OidcSecretsFile, "oidc-secrets-file", "", "file storing the encryption key of the OID Connect token. Enables OIDC filters")
flag.DurationVar(&cfg.OIDCCookieValidity, "oidc-cookie-validity", time.Hour, "sets the cookie expiry time to +1h for OIDC filters, in case no 'exp' claim is found in the JWT token")
flag.DurationVar(&cfg.OidcDistributedClaimsTimeout, "oidc-distributed-claims-timeout", 2*time.Second, "sets the default OIDC distributed claims request timeout duration to 2000ms")
flag.Var(cfg.CredentialPaths, "credentials-paths", "directories or files to watch for credentials to use by bearerinjector filter")
flag.DurationVar(&cfg.CredentialsUpdateInterval, "credentials-update-interval", 10*time.Minute, "sets the interval to update secrets")
flag.BoolVar(&cfg.EnableOpenPolicyAgent, "enable-open-policy-agent", false, "enables Open Policy Agent filters")
flag.StringVar(&cfg.OpenPolicyAgentConfigTemplate, "open-policy-agent-config-template", "", "file containing a template for an Open Policy Agent configuration file that is interpolated for each OPA filter instance")
flag.StringVar(&cfg.OpenPolicyAgentEnvoyMetadata, "open-policy-agent-envoy-metadata", "", "JSON file containing meta-data passed as input for compatibility with Envoy policies in the format")
flag.DurationVar(&cfg.OpenPolicyAgentCleanerInterval, "open-policy-agent-cleaner-interval", openpolicyagent.DefaultCleanIdlePeriod, "JSON file containing meta-data passed as input for compatibility with Envoy policies in the format")
// TLS client certs
flag.StringVar(&cfg.ClientKeyFile, "client-tls-key", "", "TLS Key file for backend connections, multiple keys may be given comma separated - the order must match the certs")
flag.StringVar(&cfg.ClientCertFile, "client-tls-cert", "", "TLS certificate files for backend connections, multiple keys may be given comma separated - the order must match the keys")
// TLS version
flag.StringVar(&cfg.TLSMinVersion, "tls-min-version", defaultMinTLSVersion, "minimal TLS Version to be used in server, proxy and client connections")
// API Monitoring:
flag.BoolVar(&cfg.ApiUsageMonitoringEnable, "enable-api-usage-monitoring", false, "enables the apiUsageMonitoring filter")
flag.StringVar(&cfg.ApiUsageMonitoringRealmKeys, "api-usage-monitoring-realm-keys", "", "name of the property in the JWT payload that contains the authority realm")
flag.StringVar(&cfg.ApiUsageMonitoringClientKeys, "api-usage-monitoring-client-keys", "sub", "comma separated list of names of the properties in the JWT body that contains the client ID")
flag.StringVar(&cfg.ApiUsageMonitoringDefaultClientTrackingPattern, "api-usage-monitoring-default-client-tracking-pattern", "", "*Deprecated*: set `client_tracking_pattern` directly on filter")
flag.StringVar(&cfg.ApiUsageMonitoringRealmsTrackingPattern, "api-usage-monitoring-realms-tracking-pattern", "services", "regular expression used for matching monitored realms (defaults is 'services')")
// Default filters:
flag.StringVar(&cfg.DefaultFiltersDir, "default-filters-dir", "", "path to directory which contains default filter configurations per service and namespace (disabled if not set)")
// Connections, timeouts:
flag.DurationVar(&cfg.WaitForHealthcheckInterval, "wait-for-healthcheck-interval", (10+5)*3*time.Second, "period waiting to become unhealthy in the loadbalancer pool in front of this instance, before shutdown triggered by SIGINT or SIGTERM") // kube-ingress-aws-controller default
flag.IntVar(&cfg.IdleConnsPerHost, "idle-conns-num", proxy.DefaultIdleConnsPerHost, "maximum idle connections per backend host")
flag.DurationVar(&cfg.CloseIdleConnsPeriod, "close-idle-conns-period", proxy.DefaultCloseIdleConnsPeriod, "sets the time interval of closing all idle connections. Not closing when 0")
flag.DurationVar(&cfg.BackendFlushInterval, "backend-flush-interval", 20*time.Millisecond, "flush interval for upgraded proxy connections")
flag.BoolVar(&cfg.ExperimentalUpgrade, "experimental-upgrade", false, "enable experimental feature to handle upgrade protocol requests")
flag.BoolVar(&cfg.ExperimentalUpgradeAudit, "experimental-upgrade-audit", false, "enable audit logging of the request line and the messages during the experimental web socket upgrades")
flag.DurationVar(&cfg.ReadTimeoutServer, "read-timeout-server", 5*time.Minute, "set ReadTimeout for http server connections")
flag.DurationVar(&cfg.ReadHeaderTimeoutServer, "read-header-timeout-server", 60*time.Second, "set ReadHeaderTimeout for http server connections")
flag.DurationVar(&cfg.WriteTimeoutServer, "write-timeout-server", 60*time.Second, "set WriteTimeout for http server connections")
flag.DurationVar(&cfg.IdleTimeoutServer, "idle-timeout-server", 60*time.Second, "set IdleTimeout for http server connections")
flag.IntVar(&cfg.MaxHeaderBytes, "max-header-bytes", http.DefaultMaxHeaderBytes, "set MaxHeaderBytes for http server connections")
flag.BoolVar(&cfg.EnableConnMetricsServer, "enable-connection-metrics", false, "enables connection metrics for http server connections")
flag.DurationVar(&cfg.TimeoutBackend, "timeout-backend", 60*time.Second, "sets the TCP client connection timeout for backend connections")
flag.DurationVar(&cfg.KeepaliveBackend, "keepalive-backend", 30*time.Second, "sets the keepalive for backend connections")
flag.BoolVar(&cfg.EnableDualstackBackend, "enable-dualstack-backend", true, "enables DualStack for backend connections")
flag.DurationVar(&cfg.TlsHandshakeTimeoutBackend, "tls-timeout-backend", 60*time.Second, "sets the TLS handshake timeout for backend connections")
flag.DurationVar(&cfg.ResponseHeaderTimeoutBackend, "response-header-timeout-backend", 60*time.Second, "sets the HTTP response header timeout for backend connections")
flag.DurationVar(&cfg.ExpectContinueTimeoutBackend, "expect-continue-timeout-backend", 30*time.Second, "sets the HTTP expect continue timeout for backend connections")
flag.IntVar(&cfg.MaxIdleConnsBackend, "max-idle-connection-backend", 0, "sets the maximum idle connections for all backend connections")
flag.BoolVar(&cfg.DisableHTTPKeepalives, "disable-http-keepalives", false, "forces backend to always create a new connection")
flag.BoolVar(&cfg.KubernetesEnableTLS, "kubernetes-enable-tls", false, "enable using kubnernetes resources to terminate tls")
// Swarm:
flag.BoolVar(&cfg.EnableSwarm, "enable-swarm", false, "enable swarm communication between nodes in a skipper fleet")
flag.Var(cfg.SwarmRedisURLs, "swarm-redis-urls", "Redis URLs as comma separated list, used for building a swarm, for example in redis based cluster ratelimits.\nUse "+redisPasswordEnv+" environment variable or 'swarm-redis-password' key in config file to set redis password")
flag.StringVar(&cfg.SwarmRedisHashAlgorithm, "swarm-redis-hash-algorithm", "", "sets hash algorithm to be used in redis ring client to find the shard <jump|mpchash|rendezvous|rendezvousVnodes>, defaults to github.com/redis/go-redis default")
flag.DurationVar(&cfg.SwarmRedisDialTimeout, "swarm-redis-dial-timeout", net.DefaultDialTimeout, "set redis client dial timeout")
flag.DurationVar(&cfg.SwarmRedisReadTimeout, "swarm-redis-read-timeout", net.DefaultReadTimeout, "set redis socket read timeout")
flag.DurationVar(&cfg.SwarmRedisWriteTimeout, "swarm-redis-write-timeout", net.DefaultWriteTimeout, "set redis socket write timeout")
flag.DurationVar(&cfg.SwarmRedisPoolTimeout, "swarm-redis-pool-timeout", net.DefaultPoolTimeout, "set redis get connection from pool timeout")
flag.IntVar(&cfg.SwarmRedisMinConns, "swarm-redis-min-conns", net.DefaultMinConns, "set min number of connections to redis")
flag.IntVar(&cfg.SwarmRedisMaxConns, "swarm-redis-max-conns", net.DefaultMaxConns, "set max number of connections to redis")
flag.StringVar(&cfg.SwarmRedisEndpointsRemoteURL, "swarm-redis-remote", "", "Remote URL to pull redis endpoints from.")
flag.StringVar(&cfg.SwarmKubernetesNamespace, "swarm-namespace", swarm.DefaultNamespace, "Kubernetes namespace to find swarm peer instances")
flag.StringVar(&cfg.SwarmKubernetesLabelSelectorKey, "swarm-label-selector-key", swarm.DefaultLabelSelectorKey, "Kubernetes labelselector key to find swarm peer instances")
flag.StringVar(&cfg.SwarmKubernetesLabelSelectorValue, "swarm-label-selector-value", swarm.DefaultLabelSelectorValue, "Kubernetes labelselector value to find swarm peer instances")
flag.IntVar(&cfg.SwarmPort, "swarm-port", swarm.DefaultPort, "swarm port to use to communicate with our peers")
flag.IntVar(&cfg.SwarmMaxMessageBuffer, "swarm-max-msg-buffer", swarm.DefaultMaxMessageBuffer, "swarm max message buffer size to use for member list messages")
flag.DurationVar(&cfg.SwarmLeaveTimeout, "swarm-leave-timeout", swarm.DefaultLeaveTimeout, "swarm leave timeout to use for leaving the memberlist on timeout")
flag.StringVar(&cfg.SwarmStaticSelf, "swarm-static-self", "", "set static swarm self node, for example 127.0.0.1:9001")
flag.StringVar(&cfg.SwarmStaticOther, "swarm-static-other", "", "set static swarm all nodes, for example 127.0.0.1:9002,127.0.0.1:9003")
flag.IntVar(&cfg.ClusterRatelimitMaxGroupShards, "cluster-ratelimit-max-group-shards", 1, "sets the maximum number of group shards for the clusterRatelimit filter")
flag.Var(cfg.LuaModules, "lua-modules", "comma separated list of lua filter modules. Use <module>.<symbol> to selectively enable module symbols, for example: package,base._G,base.print,json")
flag.Var(cfg.LuaSources, "lua-sources", `comma separated list of lua input types for the lua() filter. Valid sources "", "file", "inline", "file,inline" and "none". Use "file" to only allow lua file references in lua filter. Default "" is the same as "file","inline". Use "none" to disable lua filters.`)
cfg.flags = flag
return cfg
}
func validate(c *Config) error {
_, err := log.ParseLevel(c.ApplicationLogLevelString)
if err != nil {
return err
}
_, err = kubernetes.ParsePathMode(c.KubernetesPathModeString)
if err != nil {
return err
}
_, err = eskip.ParsePredicates(c.KubernetesEastWestRangePredicatesString)
if err != nil {
return fmt.Errorf("invalid east-west-range-predicates: %w", err)
}
_, err = kubernetes.ParseBackendTrafficAlgorithm(c.KubernetesBackendTrafficAlgorithmString)
if err != nil {
return err
}
_, err = c.parseHistogramBuckets()
if err != nil {
return err
}
return c.parseForwardedHeaders()
}
func (c *Config) Parse() error {
return c.ParseArgs(os.Args[0], os.Args[1:])
}
func (c *Config) ParseArgs(progname string, args []string) error {
c.flags.Init(progname, flag.ExitOnError)
err := c.flags.Parse(args)
if err != nil {
return err
}
// check if arguments were correctly parsed.
if len(c.flags.Args()) != 0 {
return fmt.Errorf("invalid arguments: %s", c.flags.Args())
}
configKeys := make(map[string]interface{})
if c.ConfigFile != "" {
yamlFile, err := os.ReadFile(c.ConfigFile)
if err != nil {
return fmt.Errorf("invalid config file: %w", err)
}
err = yaml.Unmarshal(yamlFile, c)
if err != nil {
return fmt.Errorf("unmarshalling config file error: %w", err)
}
_ = yaml.Unmarshal(yamlFile, configKeys)
err = c.flags.Parse(args)
if err != nil {
return err
}
}
c.checkDeprecated(configKeys,
"enable-prometheus-metrics",
"api-usage-monitoring-default-client-tracking-pattern",
"enable-kubernetes-east-west",
"kubernetes-east-west-domain",
)
if err := validate(c); err != nil {
return err
}
c.ApplicationLogLevel, _ = log.ParseLevel(c.ApplicationLogLevelString)
c.KubernetesPathMode, _ = kubernetes.ParsePathMode(c.KubernetesPathModeString)
c.KubernetesEastWestRangePredicates, _ = eskip.ParsePredicates(c.KubernetesEastWestRangePredicatesString)
c.KubernetesBackendTrafficAlgorithm, _ = kubernetes.ParseBackendTrafficAlgorithm(c.KubernetesBackendTrafficAlgorithmString)
c.HistogramMetricBuckets, _ = c.parseHistogramBuckets()
if c.ClientKeyFile != "" && c.ClientCertFile != "" {
certsFiles := strings.Split(c.ClientCertFile, ",")
keyFiles := strings.Split(c.ClientKeyFile, ",")
var certificates []tls.Certificate
for i := range keyFiles {
certificate, err := tls.LoadX509KeyPair(certsFiles[i], keyFiles[i])
if err != nil {
return fmt.Errorf("invalid key/cert pair: %w", err)
}
certificates = append(certificates, certificate)
}
c.Certificates = certificates
}
if c.NormalizeHost || c.KubernetesIngress {
c.HostPatch = net.HostPatch{
ToLower: true,
RemovePort: true,
RemoteTrailingDot: true,
}
}
c.parseEnv()
return nil
}
func (c *Config) ToOptions() skipper.Options {
var eus []string
if len(c.EtcdUrls) > 0 {
eus = strings.Split(c.EtcdUrls, ",")
}
var whitelistCIDRS []string
if len(c.WhitelistedHealthCheckCIDR) > 0 {
whitelistCIDRS = strings.Split(c.WhitelistedHealthCheckCIDR, ",")
}
options := skipper.Options{
// generic:
Address: c.Address,
InsecureAddress: c.InsecureAddress,
StatusChecks: c.StatusChecks.values,
EnableTCPQueue: c.EnableTCPQueue,
ExpectedBytesPerRequest: c.ExpectedBytesPerRequest,
MaxTCPListenerConcurrency: c.MaxTCPListenerConcurrency,
MaxTCPListenerQueue: c.MaxTCPListenerQueue,
IgnoreTrailingSlash: c.IgnoreTrailingSlash,
DevMode: c.DevMode,
SupportListener: c.SupportListener,
DebugListener: c.DebugListener,
CertPathTLS: c.CertPathTLS,
KeyPathTLS: c.KeyPathTLS,
MaxLoopbacks: c.MaxLoopbacks,
DefaultHTTPStatus: c.DefaultHTTPStatus,
LoadBalancerHealthCheckInterval: c.LoadBalancerHealthCheckInterval,
ReverseSourcePredicate: c.ReverseSourcePredicate,
MaxAuditBody: c.MaxAuditBody,
MaxMatcherBufferSize: c.MaxMatcherBufferSize,
EnableBreakers: c.EnableBreakers,
BreakerSettings: c.Breakers,
EnableRatelimiters: c.EnableRatelimiters,
RatelimitSettings: c.Ratelimits,
EnableRouteFIFOMetrics: c.EnableRouteFIFOMetrics,
EnableRouteLIFOMetrics: c.EnableRouteLIFOMetrics,
MetricsFlavours: c.MetricsFlavour.values,
FilterPlugins: c.FilterPlugins.values,
PredicatePlugins: c.PredicatePlugins.values,
DataClientPlugins: c.DataclientPlugins.values,
Plugins: c.MultiPlugins.values,
PluginDirs: []string{skipper.DefaultPluginDir},
CompressEncodings: c.CompressEncodings.values,
// logging, metrics, profiling, tracing:
EnablePrometheusMetrics: c.EnablePrometheusMetrics,
OpenTracing: strings.Split(c.OpenTracing, " "),
OpenTracingInitialSpan: c.OpenTracingInitialSpan,
OpenTracingExcludedProxyTags: strings.Split(c.OpenTracingExcludedProxyTags, ","),
OpenTracingDisableFilterSpans: c.OpenTracingDisableFilterSpans,
OpenTracingLogStreamEvents: c.OpentracingLogStreamEvents,
OpenTracingLogFilterLifecycleEvents: c.OpentracingLogFilterLifecycleEvents,
MetricsListener: c.MetricsListener,
MetricsPrefix: c.MetricsPrefix,
EnableProfile: c.EnableProfile,
BlockProfileRate: c.BlockProfileRate,
MutexProfileFraction: c.MutexProfileFraction,
EnableDebugGcMetrics: c.DebugGcMetrics,
EnableRuntimeMetrics: c.RuntimeMetrics,
EnableServeRouteMetrics: c.ServeRouteMetrics,
EnableServeRouteCounter: c.ServeRouteCounter,
EnableServeHostMetrics: c.ServeHostMetrics,
EnableServeHostCounter: c.ServeHostCounter,
EnableServeMethodMetric: c.ServeMethodMetric,
EnableServeStatusCodeMetric: c.ServeStatusCodeMetric,
EnableBackendHostMetrics: c.BackendHostMetrics,
EnableAllFiltersMetrics: c.AllFiltersMetrics,
EnableCombinedResponseMetrics: c.CombinedResponseMetrics,
EnableRouteResponseMetrics: c.RouteResponseMetrics,
EnableRouteBackendErrorsCounters: c.RouteBackendErrorCounters,
EnableRouteStreamingErrorsCounters: c.RouteStreamErrorCounters,
EnableRouteBackendMetrics: c.RouteBackendMetrics,
EnableRouteCreationMetrics: c.RouteCreationMetrics,
MetricsUseExpDecaySample: c.MetricsUseExpDecaySample,
HistogramMetricBuckets: c.HistogramMetricBuckets,
DisableMetricsCompatibilityDefaults: c.DisableMetricsCompat,
ApplicationLogOutput: c.ApplicationLog,
ApplicationLogPrefix: c.ApplicationLogPrefix,
ApplicationLogJSONEnabled: c.ApplicationLogJSONEnabled,
AccessLogOutput: c.AccessLog,
AccessLogDisabled: c.AccessLogDisabled,
AccessLogJSONEnabled: c.AccessLogJSONEnabled,
AccessLogStripQuery: c.AccessLogStripQuery,
SuppressRouteUpdateLogs: c.SuppressRouteUpdateLogs,
// route sources:
EtcdUrls: eus,
EtcdPrefix: c.EtcdPrefix,
EtcdWaitTimeout: c.EtcdTimeout,
EtcdInsecure: c.EtcdInsecure,
EtcdOAuthToken: c.EtcdOAuthToken,
EtcdUsername: c.EtcdUsername,
EtcdPassword: c.EtcdPassword,
WatchRoutesFile: c.RoutesFile,
RoutesURLs: c.RoutesURLs.values,
InlineRoutes: c.InlineRoutes,
DefaultFilters: &eskip.DefaultFilters{
Prepend: c.PrependFilters.filters,
Append: c.AppendFilters.filters,
},
DisabledFilters: c.DisabledFilters.values,
SourcePollTimeout: time.Duration(c.SourcePollTimeout) * time.Millisecond,
WaitFirstRouteLoad: c.WaitFirstRouteLoad,
// Kubernetes:
Kubernetes: c.KubernetesIngress,
KubernetesInCluster: c.KubernetesInCluster,
KubernetesURL: c.KubernetesURL,
KubernetesTokenFile: c.KubernetesTokenFile,
KubernetesHealthcheck: c.KubernetesHealthcheck,
KubernetesHTTPSRedirect: c.KubernetesHTTPSRedirect,
KubernetesHTTPSRedirectCode: c.KubernetesHTTPSRedirectCode,
KubernetesIngressClass: c.KubernetesIngressClass,
KubernetesRouteGroupClass: c.KubernetesRouteGroupClass,
WhitelistedHealthCheckCIDR: whitelistCIDRS,
KubernetesPathMode: c.KubernetesPathMode,
KubernetesNamespace: c.KubernetesNamespace,
KubernetesEnableEndpointslices: c.KubernetesEnableEndpointSlices,
KubernetesEnableEastWest: c.KubernetesEnableEastWest,
KubernetesEastWestDomain: c.KubernetesEastWestDomain,
KubernetesEastWestRangeDomains: c.KubernetesEastWestRangeDomains.values,
KubernetesEastWestRangePredicates: c.KubernetesEastWestRangePredicates,
KubernetesOnlyAllowedExternalNames: c.KubernetesOnlyAllowedExternalNames,
KubernetesAllowedExternalNames: c.KubernetesAllowedExternalNames,
KubernetesRedisServiceNamespace: c.KubernetesRedisServiceNamespace,
KubernetesRedisServiceName: c.KubernetesRedisServiceName,
KubernetesRedisServicePort: c.KubernetesRedisServicePort,
KubernetesBackendTrafficAlgorithm: c.KubernetesBackendTrafficAlgorithm,
KubernetesDefaultLoadBalancerAlgorithm: c.KubernetesDefaultLoadBalancerAlgorithm,
// API Monitoring:
ApiUsageMonitoringEnable: c.ApiUsageMonitoringEnable,
ApiUsageMonitoringRealmKeys: c.ApiUsageMonitoringRealmKeys,
ApiUsageMonitoringClientKeys: c.ApiUsageMonitoringClientKeys,
ApiUsageMonitoringRealmsTrackingPattern: c.ApiUsageMonitoringRealmsTrackingPattern,
// Default filters:
DefaultFiltersDir: c.DefaultFiltersDir,
// Auth:
EnableOAuth2GrantFlow: c.EnableOAuth2GrantFlow,
OAuth2AuthURL: c.Oauth2AuthURL,
OAuth2TokenURL: c.Oauth2TokenURL,
OAuth2RevokeTokenURL: c.Oauth2RevokeTokenURL,
OAuthTokeninfoURL: c.Oauth2TokeninfoURL,
OAuthTokeninfoTimeout: c.Oauth2TokeninfoTimeout,
OAuthTokeninfoCacheSize: c.Oauth2TokeninfoCacheSize,
OAuthTokeninfoCacheTTL: c.Oauth2TokeninfoCacheTTL,
OAuth2SecretFile: c.Oauth2SecretFile,
OAuth2ClientID: c.Oauth2ClientID,
OAuth2ClientSecret: c.Oauth2ClientSecret,
OAuth2ClientIDFile: c.Oauth2ClientIDFile,
OAuth2ClientSecretFile: c.Oauth2ClientSecretFile,
OAuth2CallbackPath: c.Oauth2CallbackPath,
OAuthTokenintrospectionTimeout: c.Oauth2TokenintrospectionTimeout,
OAuth2AuthURLParameters: c.Oauth2AuthURLParameters.values,
OAuth2AccessTokenHeaderName: c.Oauth2AccessTokenHeaderName,
OAuth2TokeninfoSubjectKey: c.Oauth2TokeninfoSubjectKey,
OAuth2GrantTokeninfoKeys: c.Oauth2GrantTokeninfoKeys.values,
OAuth2TokenCookieName: c.Oauth2TokenCookieName,
OAuth2TokenCookieRemoveSubdomains: c.Oauth2TokenCookieRemoveSubdomains,
OAuth2GrantInsecure: c.Oauth2GrantInsecure,
WebhookTimeout: c.WebhookTimeout,
OIDCSecretsFile: c.OidcSecretsFile,
OIDCCookieValidity: c.OIDCCookieValidity,
OIDCDistributedClaimsTimeout: c.OidcDistributedClaimsTimeout,
CredentialsPaths: c.CredentialPaths.values,
CredentialsUpdateInterval: c.CredentialsUpdateInterval,
// connections, timeouts:
WaitForHealthcheckInterval: c.WaitForHealthcheckInterval,
IdleConnectionsPerHost: c.IdleConnsPerHost,
CloseIdleConnsPeriod: c.CloseIdleConnsPeriod,
BackendFlushInterval: c.BackendFlushInterval,
ExperimentalUpgrade: c.ExperimentalUpgrade,
ExperimentalUpgradeAudit: c.ExperimentalUpgradeAudit,
ReadTimeoutServer: c.ReadTimeoutServer,
ReadHeaderTimeoutServer: c.ReadHeaderTimeoutServer,
WriteTimeoutServer: c.WriteTimeoutServer,
IdleTimeoutServer: c.IdleTimeoutServer,
MaxHeaderBytes: c.MaxHeaderBytes,
EnableConnMetricsServer: c.EnableConnMetricsServer,
TimeoutBackend: c.TimeoutBackend,
KeepAliveBackend: c.KeepaliveBackend,
DualStackBackend: c.EnableDualstackBackend,
TLSHandshakeTimeoutBackend: c.TlsHandshakeTimeoutBackend,
ResponseHeaderTimeoutBackend: c.ResponseHeaderTimeoutBackend,
ExpectContinueTimeoutBackend: c.ExpectContinueTimeoutBackend,
MaxIdleConnsBackend: c.MaxIdleConnsBackend,
DisableHTTPKeepalives: c.DisableHTTPKeepalives,
KubernetesEnableTLS: c.KubernetesEnableTLS,
// swarm:
EnableSwarm: c.EnableSwarm,
// redis based
SwarmRedisURLs: c.SwarmRedisURLs.values,
SwarmRedisPassword: c.SwarmRedisPassword,
SwarmRedisHashAlgorithm: c.SwarmRedisHashAlgorithm,
SwarmRedisDialTimeout: c.SwarmRedisDialTimeout,
SwarmRedisReadTimeout: c.SwarmRedisReadTimeout,
SwarmRedisWriteTimeout: c.SwarmRedisWriteTimeout,
SwarmRedisPoolTimeout: c.SwarmRedisPoolTimeout,
SwarmRedisMinIdleConns: c.SwarmRedisMinConns,
SwarmRedisMaxIdleConns: c.SwarmRedisMaxConns,
SwarmRedisEndpointsRemoteURL: c.SwarmRedisEndpointsRemoteURL,
// swim based
SwarmKubernetesNamespace: c.SwarmKubernetesNamespace,
SwarmKubernetesLabelSelectorKey: c.SwarmKubernetesLabelSelectorKey,
SwarmKubernetesLabelSelectorValue: c.SwarmKubernetesLabelSelectorValue,
SwarmPort: c.SwarmPort,
SwarmMaxMessageBuffer: c.SwarmMaxMessageBuffer,
SwarmLeaveTimeout: c.SwarmLeaveTimeout,
// swim on localhost for testing
SwarmStaticSelf: c.SwarmStaticSelf,
SwarmStaticOther: c.SwarmStaticOther,
ClusterRatelimitMaxGroupShards: c.ClusterRatelimitMaxGroupShards,
LuaModules: c.LuaModules.values,
LuaSources: c.LuaSources.values,
EnableOpenPolicyAgent: c.EnableOpenPolicyAgent,
OpenPolicyAgentConfigTemplate: c.OpenPolicyAgentConfigTemplate,
OpenPolicyAgentEnvoyMetadata: c.OpenPolicyAgentEnvoyMetadata,
OpenPolicyAgentCleanerInterval: c.OpenPolicyAgentCleanerInterval,
}
for _, rcci := range c.CloneRoute {
eskipClone := eskip.NewClone(rcci.Reg, rcci.Repl)
options.CloneRoute = append(options.CloneRoute, eskipClone)
}
for _, rcci := range c.EditRoute {
eskipEdit := eskip.NewEditor(rcci.Reg, rcci.Repl)
options.EditRoute = append(options.EditRoute, eskipEdit)
}
if c.PluginDir != "" {
options.PluginDirs = append(options.PluginDirs, c.PluginDir)
}
if c.Insecure {
options.ProxyFlags |= proxy.Insecure
}
if c.ProxyPreserveHost {
options.ProxyFlags |= proxy.PreserveHost
}
if c.RemoveHopHeaders {
options.ProxyFlags |= proxy.HopHeadersRemoval
}
if c.RfcPatchPath {
options.ProxyFlags |= proxy.PatchPath
}
if c.Certificates != nil && len(c.Certificates) > 0 {
options.ClientTLS = &tls.Config{
Certificates: c.Certificates,
MinVersion: c.getMinTLSVersion(),
}
}
var wrappers []func(handler http.Handler) http.Handler
options.CustomHttpHandlerWrap = func(handler http.Handler) http.Handler {
for _, wrapper := range wrappers {
handler = wrapper(handler)
}
return handler
}
if c.ForwardedHeaders != (net.ForwardedHeaders{}) {
wrappers = append(wrappers, func(handler http.Handler) http.Handler {
return &net.ForwardedHeadersHandler{
Headers: c.ForwardedHeaders,
Exclude: c.ForwardedHeadersExcludeCIDRs,
Handler: handler,
}
})
}
if c.HostPatch != (net.HostPatch{}) {
wrappers = append(wrappers, func(handler http.Handler) http.Handler {
return &net.HostPatchHandler{
Patch: c.HostPatch,
Handler: handler,
}
})
}
if len(c.RefusePayload) > 0 {
wrappers = append(wrappers, func(handler http.Handler) http.Handler {
return &net.RequestMatchHandler{
Match: c.RefusePayload,
Handler: handler,
}
})
}
if c.ValidateQuery {
wrappers = append(wrappers, func(handler http.Handler) http.Handler {
return &net.ValidateQueryHandler{
Handler: handler,
}
})
}
if c.ValidateQueryLog {
wrappers = append(wrappers, func(handler http.Handler) http.Handler {
return &net.ValidateQueryLogHandler{
Handler: handler,
}
})
}
return options
}
func (c *Config) getMinTLSVersion() uint16 {
tlsVersionTable := map[string]uint16{
"1.3": tls.VersionTLS13,
"13": tls.VersionTLS13,
"1.2": tls.VersionTLS12,
"12": tls.VersionTLS12,
"1.1": tls.VersionTLS11,