config

package
v0.10.0-rc1 Latest Latest
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 Go to latest Published: Jun 30, 2020 License: Apache-2.0 Imports: 29 Imported by: 7

Documentation

Overview

Package config is a configuration abstraction that facilitates enabling Pomerium settings forvarious encoding types (JSON/YAML/ENVARS) and methods.

Index

Constants

View Source 
const (
	// ServiceAll represents running all services in "all-in-one" mode
	ServiceAll = "all"
	// ServiceProxy represents running the proxy service component
	ServiceProxy = "proxy"
	// ServiceAuthorize represents running the authorize service component
	ServiceAuthorize = "authorize"
	// ServiceAuthenticate represents running the authenticate service component
	ServiceAuthenticate = "authenticate"
	// ServiceCache represents running the cache service component
	ServiceCache = "cache"
)
View Source 
const (
	// JaegerTracingProviderName is the name of the tracing provider Jaeger.
	JaegerTracingProviderName = "jaeger"
	// ZipkinTracingProviderName is the name of the tracing provider Zipkin.
	ZipkinTracingProviderName = "zipkin"
)
View Source 
const DefaultAlternativeAddr = ":5443"

DefaultAlternativeAddr is the address used is two services are competing over the same listener. Typically this is invisible to the end user (e.g. localhost) gRPC server, or is used for healthchecks (authorize only service)

View Source 
const DisableHeaderKey = "disable"

DisableHeaderKey is the key used to check whether to disable setting header

Variables

View Source 
var AutocertManager = newAutocertManager()

AutocertManager manages Let's Encrypt certificates based on configuration options.

View Source 
var EnvoyAdminURL = &url.URL{Host: "localhost:9901", Scheme: "http"}

EnvoyAdminURL indicates where the envoy control plane is listening

View Source 
var RedirectAndAutocertServer = newRedirectAndAutoCertServer()

RedirectAndAutocertServer is an HTTP server which handles redirecting to HTTPS and autocerts.

Functions

func IsAll 

func IsAll(s string) bool

IsAll checks to see if we should be running all services

func IsAuthenticate 

func IsAuthenticate(s string) bool

IsAuthenticate checks to see if we should be running the authenticate service

func IsAuthorize 

func IsAuthorize(s string) bool

IsAuthorize checks to see if we should be running the authorize service

func IsCache added in v0.6.0 

func IsCache(s string) bool

IsCache checks to see if we should be running the proxy service

func IsProxy 

func IsProxy(s string) bool

IsProxy checks to see if we should be running the proxy service

func IsValidService 

func IsValidService(s string) bool

IsValidService checks to see if a service is a valid service mode

func WatchChanges added in v0.9.0 

func WatchChanges(configFile string, opt *Options, services []OptionsUpdater)

WatchChanges takes a configuration file, an existing options struct, and updates each service in the services slice OptionsUpdater with a new set of options if any change is detected. It also periodically rechecks if any computed properties have changed.

Types

type AutocertOptions added in v0.10.0 

type AutocertOptions struct {
	// Enable enables fully automated certificate management including issuance
	// and renewal from LetsEncrypt. Must be used in conjunction with Folder.
	Enable bool `mapstructure:"autocert" yaml:"autocert,omitempty"`

	// UseStaging tells autocert to use Let's Encrypt's staging CA which
	// has less strict usage limits then the (default) production CA.
	//
	// https://letsencrypt.org/docs/staging-environment/
	UseStaging bool `mapstructure:"autocert_use_staging" yaml:"autocert_use_staging,omitempty"`

	// MustStaple will cause autocert to request a certificate with
	// status_request extension. This will allow the TLS client (the browser)
	// to fail immediately if Pomerium failed to get an OCSP staple.
	// See also https://tools.ietf.org/html/rfc7633
	// Only used when Enable is true.
	MustStaple bool `mapstructure:"autocert_must_staple" yaml:"autocert_must_staple,omitempty"`

	// Folder specifies the location to store, and load autocert managed
	// TLS certificates.
	// defaults to $XDG_DATA_HOME/pomerium
	Folder string `mapstructure:"autocert_dir" yaml:"autocert_dir,omitempty"`
}

AutocertOptions contains the options to control the behavior of autocert.

type Options 

type Options struct {
	// Debug outputs human-readable logs to Stdout.
	Debug bool `mapstructure:"pomerium_debug" yaml:"pomerium_debug,omitempty"`

	// LogLevel sets the global override for log level. All Loggers will use at least this value.
	// Possible options are "info","warn","debug" and "error". Defaults to "info".
	LogLevel string `mapstructure:"log_level" yaml:"log_level,omitempty"`

	// ProxyLogLevel sets the log level for the proxy service.
	// Possible options are "info","warn", and "error". Defaults to the value of `LogLevel`.
	ProxyLogLevel string `mapstructure:"proxy_log_level" yaml:"proxy_log_level,omitempty"`

	// SharedKey is the shared secret authorization key used to mutually authenticate
	// requests between services.
	SharedKey string `mapstructure:"shared_secret" yaml:"shared_secret,omitempty"`

	// Services is a list enabled service mode. If none are selected, "all" is used.
	// Available options are : "all", "authenticate", "proxy".
	Services string `mapstructure:"services" yaml:"services,omitempty"`

	// Addr specifies the host and port on which the server should serve
	// HTTPS requests. If empty, ":443" (localhost:443) is used.
	Addr string `mapstructure:"address" yaml:"address,omitempty"`

	// InsecureServer when enabled disables all transport security.
	// In this mode, Pomerium is susceptible to man-in-the-middle attacks.
	// This should be used only for testing.
	InsecureServer bool `mapstructure:"insecure_server" yaml:"insecure_server,omitempty"`

	CertificateFiles []certificateFilePair `mapstructure:"certificates" yaml:"certificates,omitempty"`

	// Cert and Key is the x509 certificate used to create the HTTPS server.
	Cert string `mapstructure:"certificate" yaml:"certificate,omitempty"`
	Key  string `mapstructure:"certificate_key" yaml:"certificate_key,omitempty"`

	// CertFile and KeyFile is the x509 certificate used to hydrate TLSCertificate
	CertFile string `mapstructure:"certificate_file" yaml:"certificate_file,omitempty"`
	KeyFile  string `mapstructure:"certificate_key_file" yaml:"certificate_key_file,omitempty"`

	Certificates []tls.Certificate `mapstructure:"-" yaml:"-"`

	// HttpRedirectAddr, if set, specifies the host and port to run the HTTP
	// to HTTPS redirect server on. If empty, no redirect server is started.
	HTTPRedirectAddr string `mapstructure:"http_redirect_addr" yaml:"http_redirect_addr,omitempty"`

	// Timeout settings : https://github.com/pomerium/pomerium/issues/40
	ReadTimeout  time.Duration `mapstructure:"timeout_read" yaml:"timeout_read,omitempty"`
	WriteTimeout time.Duration `mapstructure:"timeout_write" yaml:"timeout_write,omitempty"`
	IdleTimeout  time.Duration `mapstructure:"timeout_idle" yaml:"timeout_idle,omitempty"`

	// Policies define per-route configuration and access control policies.
	Policies   []Policy `yaml:"policy,omitempty"`
	PolicyEnv  string   `yaml:",omitempty"`
	PolicyFile string   `mapstructure:"policy_file" yaml:"policy_file,omitempty"`

	// AuthenticateURL represents the externally accessible http endpoints
	// used for authentication requests and callbacks
	AuthenticateURLString string   `mapstructure:"authenticate_service_url" yaml:"authenticate_service_url,omitempty"`
	AuthenticateURL       *url.URL `yaml:"-,omitempty"`

	// AuthenticateCallbackPath is the path to the HTTP endpoint that will
	// receive the response from your identity provider. The value must exactly
	// match one of the authorized redirect URIs for the OAuth 2.0 client.
	// Defaults to: `/oauth2/callback`
	AuthenticateCallbackPath string `mapstructure:"authenticate_callback_path" yaml:"authenticate_callback_path,omitempty"`

	// Session/Cookie management
	// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Set-Cookie
	CookieName     string        `mapstructure:"cookie_name" yaml:"cookie_name,omitempty"`
	CookieSecret   string        `mapstructure:"cookie_secret" yaml:"cookie_secret,omitempty"`
	CookieDomain   string        `mapstructure:"cookie_domain" yaml:"cookie_domain,omitempty"`
	CookieSecure   bool          `mapstructure:"cookie_secure" yaml:"cookie_secure,omitempty"`
	CookieHTTPOnly bool          `mapstructure:"cookie_http_only" yaml:"cookie_http_only,omitempty"`
	CookieExpire   time.Duration `mapstructure:"cookie_expire" yaml:"cookie_expire,omitempty"`

	// Identity provider configuration variables as specified by RFC6749
	// https://openid.net/specs/openid-connect-basic-1_0.html#RFC6749
	ClientID       string   `mapstructure:"idp_client_id" yaml:"idp_client_id,omitempty"`
	ClientSecret   string   `mapstructure:"idp_client_secret" yaml:"idp_client_secret,omitempty"`
	Provider       string   `mapstructure:"idp_provider" yaml:"idp_provider,omitempty"`
	ProviderURL    string   `mapstructure:"idp_provider_url" yaml:"idp_provider_url,omitempty"`
	Scopes         []string `mapstructure:"idp_scopes" yaml:"idp_scopes,omitempty"`
	ServiceAccount string   `mapstructure:"idp_service_account" yaml:"idp_service_account,omitempty"`

	// RequestParams are custom request params added to the signin request as
	// part of an Oauth2 code flow.
	//
	// https://www.iana.org/assignments/oauth-parameters/oauth-parameters.xhtml
	// https://openid.net/specs/openid-connect-basic-1_0.html#RequestParameters
	RequestParams map[string]string `mapstructure:"idp_request_params" yaml:"idp_request_params,omitempty"`

	// Administrators contains a set of emails with users who have super user
	// (sudo) access including the ability to impersonate other users' access
	Administrators []string `mapstructure:"administrators" yaml:"administrators,omitempty"`

	// AuthorizeURL is the routable destination of the authorize service's
	// gRPC endpoint. NOTE: As many load balancers do not support
	// externally routed gRPC so this may be an internal location.
	AuthorizeURLString string   `mapstructure:"authorize_service_url" yaml:"authorize_service_url,omitempty"`
	AuthorizeURL       *url.URL `yaml:",omitempty"`

	// Settings to enable custom behind-the-ingress service communication
	OverrideCertificateName string `mapstructure:"override_certificate_name" yaml:"override_certificate_name,omitempty"`
	CA                      string `mapstructure:"certificate_authority" yaml:"certificate_authority,omitempty"`
	CAFile                  string `mapstructure:"certificate_authority_file" yaml:"certificate_authority_file,omitempty"`

	// SigningKey is the private key used to add a JWT-signature.
	// https://www.pomerium.io/docs/signed-headers.html
	SigningKey string `mapstructure:"signing_key" yaml:"signing_key,omitempty"`

	// Headers to set on all proxied requests. Add a 'disable' key map to turn off.
	HeadersEnv string            `yaml:",omitempty"`
	Headers    map[string]string `yaml:",omitempty"`

	// List of JWT claims to insert as x-pomerium-claim-* headers on proxied requests
	JWTClaimsHeaders []string `mapstructure:"jwt_claims_headers" yaml:"jwt_claims_headers,omitempty"`

	// RefreshCooldown limits the rate a user can refresh her session
	RefreshCooldown time.Duration `mapstructure:"refresh_cooldown" yaml:"refresh_cooldown,omitempty"`

	DefaultUpstreamTimeout time.Duration `mapstructure:"default_upstream_timeout" yaml:"default_upstream_timeout,omitempty"`

	// Address/Port to bind to for prometheus metrics
	MetricsAddr string `mapstructure:"metrics_address" yaml:"metrics_address,omitempty"`

	// Tracing shared settings
	TracingProvider   string  `mapstructure:"tracing_provider" yaml:"tracing_provider,omitempty"`
	TracingSampleRate float64 `mapstructure:"tracing_sample_rate" yaml:"tracing_sample_rate,omitempty"`

	//  Jaeger
	//
	// CollectorEndpoint is the full url to the Jaeger HTTP Thrift collector.
	// For example, http://localhost:14268/api/traces
	TracingJaegerCollectorEndpoint string `mapstructure:"tracing_jaeger_collector_endpoint" yaml:"tracing_jaeger_collector_endpoint,omitempty"`

	// Zipkin
	//
	// ZipkinEndpoint configures the zipkin collector URI
	// Example: http://zipkin:9411/api/v2/spans
	TracingJaegerAgentEndpoint string `mapstructure:"tracing_jaeger_agent_endpoint" yaml:"tracing_jaeger_agent_endpoint,omitempty"`
	ZipkinEndpoint             string `mapstructure:"tracing_zipkin_endpoint" yaml:"tracing_zipkin_endpoint"`

	// GRPCAddr specifies the host and port on which the server should serve
	// gRPC requests. If running in all-in-one mode, ":5443" (localhost:5443) is used.
	GRPCAddr string `mapstructure:"grpc_address" yaml:"grpc_address,omitempty"`

	// GRPCInsecure disables transport security.
	// If running in all-in-one mode, defaults to true.
	GRPCInsecure bool `mapstructure:"grpc_insecure" yaml:"grpc_insecure,omitempty"`

	GRPCClientTimeout       time.Duration `mapstructure:"grpc_client_timeout" yaml:"grpc_client_timeout,omitempty"`
	GRPCClientDNSRoundRobin bool          `mapstructure:"grpc_client_dns_roundrobin" yaml:"grpc_client_dns_roundrobin,omitempty"`

	//GRPCServerMaxConnectionAge sets MaxConnectionAge in the grpc ServerParameters used to create GRPC Services
	GRPCServerMaxConnectionAge time.Duration `mapstructure:"grpc_server_max_connection_age" yaml:"grpc_server_max_connection_age,omitempty"`
	//GRPCServerMaxConnectionAgeGrace sets MaxConnectionAgeGrace in the grpc ServerParameters used to create GRPC Services
	GRPCServerMaxConnectionAgeGrace time.Duration `mapstructure:"grpc_server_max_connection_age_grace,omitempty" yaml:"grpc_server_max_connection_age_grace,omitempty"` //nolint: lll

	// ForwardAuthEndpoint allows for a given route to be used as a forward-auth
	// endpoint instead of a reverse proxy. Some third-party proxies that do not
	// have rich access control capabilities (nginx, envoy, ambassador, traefik)
	// allow you to delegate and authenticate each request to your website
	// with an external server or service. Pomerium can be configured to accept
	// these requests with this switch
	ForwardAuthURLString string   `mapstructure:"forward_auth_url" yaml:"forward_auth_url,omitempty"`
	ForwardAuthURL       *url.URL `yaml:",omitempty"`

	// CacheURL is the routable destination of the cache service's
	// gRPC endpoint. NOTE: As many load balancers do not support
	// externally routed gRPC so this may be an internal location.
	//
	// TODO(BDD): Deprecate and remove in 0.11.0
	CacheURLString string   `mapstructure:"cache_service_url" yaml:"cache_service_url,omitempty"`
	CacheURL       *url.URL `yaml:",omitempty"`

	// DataBrokerURL is the routable destination of the databroker service's gRPC endpiont.
	DataBrokerURLString string   `mapstructure:"databroker_service_url" yaml:"databroker_service_url,omitempty"`
	DataBrokerURL       *url.URL `yaml:",omitempty"`

	// ClientCA is the base64-encoded certificate authority to validate client mTLS certificates against.
	ClientCA string `mapstructure:"client_ca" yaml:"client_ca,omitempty"`
	// ClientCAFile points to a file that contains the certificate authority to validate client mTLS certificates against.
	ClientCAFile string `mapstructure:"client_ca_file" yaml:"client_ca_file,omitempty"`

	AutocertOptions `mapstructure:",squash" yaml:",inline"`
	// contains filtered or unexported fields
}

Options are the global environmental flags used to set up pomerium's services. Use NewXXXOptions() methods for a safely initialized data structure.

func NewDefaultOptions 

func NewDefaultOptions() *Options

NewDefaultOptions returns a copy the default options. It's the caller's responsibility to do a follow up Validate call.

func NewOptionsFromConfig 

func NewOptionsFromConfig(configFile string) (*Options, error)

NewOptionsFromConfig builds the main binary's configuration options by parsing environmental variables and config file

func (*Options) Checksum 

func (o *Options) Checksum() uint64

Checksum returns the checksum of the current options struct

func (*Options) GetAuthenticateURL added in v0.9.0 

func (o *Options) GetAuthenticateURL() *url.URL

GetAuthenticateURL returns the AuthenticateURL in the options or localhost.

func (*Options) GetAuthorizeURL added in v0.9.0 

func (o *Options) GetAuthorizeURL() *url.URL

GetAuthorizeURL returns the AuthorizeURL in the options or localhost:5443.

func (*Options) GetDataBrokerURL added in v0.10.0 

func (o *Options) GetDataBrokerURL() *url.URL

GetDataBrokerURL returns the DataBrokerURL in the options or localhost:5443.

func (*Options) GetForwardAuthURL added in v0.9.0 

func (o *Options) GetForwardAuthURL() *url.URL

GetForwardAuthURL returns the ForwardAuthURL in the options or localhost.

func (*Options) GetOauthOptions added in v0.10.0 

func (o *Options) GetOauthOptions() oauth.Options

GetOauthOptions gets the oauth.Options for the given config options.

func (*Options) OnConfigChange 

func (o *Options) OnConfigChange(run func(in fsnotify.Event))

OnConfigChange starts a go routine and watches for any changes. If any are detected, via an fsnotify event the provided function is run.

func (*Options) Validate 

func (o *Options) Validate() error

Validate ensures the Options fields are valid, and hydrated.

type OptionsUpdater 

type OptionsUpdater interface {
	UpdateOptions(Options) error
}

OptionsUpdater updates local state based on an Options struct

type Policy 

type Policy struct {
	From string `mapstructure:"from" yaml:"from"`
	To   string `mapstructure:"to" yaml:"to"`
	// Identity related policy
	AllowedUsers   []string `mapstructure:"allowed_users" yaml:"allowed_users,omitempty" json:"allowed_users,omitempty"`
	AllowedGroups  []string `mapstructure:"allowed_groups" yaml:"allowed_groups,omitempty" json:"allowed_groups,omitempty"`
	AllowedDomains []string `mapstructure:"allowed_domains" yaml:"allowed_domains,omitempty" json:"allowed_domains,omitempty"`

	Source      *StringURL `yaml:",omitempty" json:"source,omitempty" hash:"ignore"`
	Destination *url.URL   `yaml:",omitempty" json:"destination,omitempty" hash:"ignore"`

	// Additional route matching options
	Prefix string `mapstructure:"prefix" yaml:"prefix,omitempty" json:"prefix,omitempty"`
	Path   string `mapstructure:"path" yaml:"path,omitempty" json:"path,omitempty"`
	Regex  string `mapstructure:"regex" yaml:"regex,omitempty" json:"regex,omitempty"`

	// Allow unauthenticated HTTP OPTIONS requests as per the CORS spec
	// https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#Preflighted_requests
	CORSAllowPreflight bool `mapstructure:"cors_allow_preflight" yaml:"cors_allow_preflight,omitempty"`

	// Allow any public request to access this route. **Bypasses authentication**
	AllowPublicUnauthenticatedAccess bool `mapstructure:"allow_public_unauthenticated_access" yaml:"allow_public_unauthenticated_access,omitempty"`

	// UpstreamTimeout is the route specific timeout. Must be less than the global
	// timeout. If unset,  route will fallback to the proxy's DefaultUpstreamTimeout.
	UpstreamTimeout time.Duration `mapstructure:"timeout" yaml:"timeout,omitempty"`

	// Enable proxying of websocket connections by removing the default timeout handler.
	// Caution: Enabling this feature could result in abuse via DOS attacks.
	AllowWebsockets bool `mapstructure:"allow_websockets"  yaml:"allow_websockets,omitempty"`

	// TLSSkipVerify controls whether a client verifies the server's certificate
	// chain and host name.
	// If TLSSkipVerify is true, TLS accepts any certificate presented by the
	// server and any host name in that certificate.
	// In this mode, TLS is susceptible to man-in-the-middle attacks.
	// This should be used only for testing.
	TLSSkipVerify bool `mapstructure:"tls_skip_verify" yaml:"tls_skip_verify,omitempty"`

	// TLSServerName overrides the hostname in the `to` field. This is useful
	// if your backend is an HTTPS server with a valid certificate, but you
	// want to communicate to the backend with an internal hostname (e.g.
	// Docker container name).
	TLSServerName string `mapstructure:"tls_server_name" yaml:"tls_server_name,omitempty"`

	// TLSCustomCA defines the  root certificate to use with a given
	// route when verifying server certificates.
	TLSCustomCA     string `mapstructure:"tls_custom_ca" yaml:"tls_custom_ca,omitempty"`
	TLSCustomCAFile string `mapstructure:"tls_custom_ca_file" yaml:"tls_custom_ca_file,omitempty"`

	// Contains the x.509 client certificate to present to the downstream
	// host.
	TLSClientCert     string           `mapstructure:"tls_client_cert" yaml:"tls_client_cert,omitempty"`
	TLSClientKey      string           `mapstructure:"tls_client_key" yaml:"tls_client_key,omitempty"`
	TLSClientCertFile string           `mapstructure:"tls_client_cert_file" yaml:"tls_client_cert_file,omitempty"`
	TLSClientKeyFile  string           `mapstructure:"tls_client_key_file" yaml:"tls_client_key_file,omitempty"`
	ClientCertificate *tls.Certificate `yaml:",omitempty" hash:"ignore"`

	// SetRequestHeaders adds a collection of headers to the downstream request
	// in the form of key value pairs. Note bene, this will overwrite the
	// value of any existing value of a given header key.
	SetRequestHeaders map[string]string `mapstructure:"set_request_headers" yaml:"set_request_headers,omitempty"`

	// RemoveRequestHeaders removes a collection of headers from a downstream request.
	// Note that this has lower priority than `SetRequestHeaders`, if you specify `X-Custom-Header` in both
	// `SetRequestHeaders` and `RemoveRequestHeaders`, then the header won't be removed.
	RemoveRequestHeaders []string `mapstructure:"remove_request_headers" yaml:"remove_request_headers,omitempty"`

	// PreserveHostHeader disables host header rewriting.
	//
	// This option only takes affect if the destination is a DNS name. If the destination is an IP address,
	// use SetRequestHeaders to explicitly set the "Host" header.
	//
	// https://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_set_header
	PreserveHostHeader bool `mapstructure:"preserve_host_header" yaml:"preserve_host_header,omitempty"`

	// PassIdentityHeaders controls whether to add a user's identity headers to the downstream request.
	// These includes:
	//
	//  - X-Pomerium-Jwt-Assertion
	//  - X-Pomerium-Claim-*
	//
	PassIdentityHeaders bool `mapstructure:"pass_identity_headers" yaml:"pass_identity_headers,omitempty"`
}

Policy contains route specific configuration and access settings.

func (*Policy) Checksum added in v0.9.0 

func (p *Policy) Checksum() uint64

Checksum returns the xxhash hash for the policy.

func (*Policy) RouteID added in v0.9.1 

func (p *Policy) RouteID() uint64

RouteID returns a unique identifier for a route

func (*Policy) String 

func (p *Policy) String() string

func (*Policy) Validate 

func (p *Policy) Validate() error

Validate checks the validity of a policy.

type StringURL added in v0.8.0 

type StringURL struct {
	*url.URL
}

StringURL stores a URL as a string in json.

func (*StringURL) MarshalJSON added in v0.8.0 

func (u *StringURL) MarshalJSON() ([]byte, error)

MarshalJSON returns the URLs host as json.

type TracingOptions added in v0.9.0 

type TracingOptions struct {
	// Shared
	Provider string
	Service  string
	Debug    bool

	// CollectorEndpoint is the full url to the Jaeger HTTP Thrift collector.
	// For example, http://localhost:14268/api/traces
	JaegerCollectorEndpoint *url.URL
	// AgentEndpoint instructs exporter to send spans to jaeger-agent at this address.
	// For example, localhost:6831.
	JaegerAgentEndpoint string

	// ZipkinEndpoint configures the zipkin collector URI
	// Example: http://zipkin:9411/api/v2/spans
	ZipkinEndpoint *url.URL

	// SampleRate is percentage of requests which are sampled
	SampleRate float64
}

TracingOptions contains the configurations settings for a http server.

func NewTracingOptions added in v0.9.0 

func NewTracingOptions(o *Options) (*TracingOptions, error)

NewTracingOptions builds a new TracingOptions from core Options

func (*TracingOptions) Enabled added in v0.9.0 

func (t *TracingOptions) Enabled() bool

Enabled indicates whether tracing is enabled on a given TracingOptions

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