oauth2clientauthextension

README

Authenticator - OAuth2 Client Credentials

This extension provides OAuth2 Client Credentials flow authenticator for HTTP and gRPC based exporters. The extension fetches and refreshes the token after expiry automatically. For further details about OAuth2 Client Credentials flow (2-legged workflow) refer https://datatracker.ietf.org/doc/html/rfc6749#section-4.4.

The authenticator type has to be set to oauth2client.

Configuration

extensions:
  oauth2client:
    client_id: someclientid
    client_secret: someclientsecret
    token_url: https://example.com/oauth2/default/v1/token
    scopes: ["api.metrics"]
    # tls settings for the token client
    tls:
      insecure: true
      ca_file: /var/lib/mycert.pem
      cert_file: certfile
      key_file: keyfile
    # timeout for the token client
    timeout: 2s
    
receivers:
  hostmetrics:
    scrapers:
      memory:
  otlp:
    protocols:
      grpc:

exporters:
  otlphttp/withauth:
    endpoint: http://localhost:9000
    auth:
      authenticator: oauth2client
      
  otlp/withauth:
    endpoint: 0.0.0.0:5000
    ca_file: /tmp/certs/ca.pem
    auth:
      authenticator: oauth2client

service:
  extensions: [oauth2client]
  pipelines:
    metrics:
      receivers: [hostmetrics]
      processors: []
      exporters: [otlphttp/withauth, otlp/withauth]

Following are the configuration fields

• token_url - The resource server's token endpoint URLs.
• client_id - The client identifier issued to the client.
• client_secret - The secret string associated with above identifier.
• scopes - Optional optional requested permissions associated for the client.
• timeout - Optional specifies the timeout on the underlying client to authorization server for fetching the tokens (initial and while refreshing). This is optional and not setting this configuration implies there is no timeout on the client.

For more information on client side TLS settings, see configtls README.

Documentation

Overview

Package oauth2clientcredentialsauthextension implements `configauth.ClientAuthenticator` This extension provides OAuth2 Client Credentials flow authenticator for HTTP and gRPC based exporters. The extension fetches and refreshes the token after expiry For further details about OAuth2 Client Credentials flow refer https://datatracker.ietf.org/doc/html/rfc6749#section-4.4

Index

• func NewFactory() component.ExtensionFactory
• type ClientCredentialsAuthenticator
  • func (o *ClientCredentialsAuthenticator) PerRPCCredentials() (credentials.PerRPCCredentials, error)
  • func (o *ClientCredentialsAuthenticator) RoundTripper(base http.RoundTripper) (http.RoundTripper, error)
  • func (o *ClientCredentialsAuthenticator) Shutdown(_ context.Context) error
  • func (o *ClientCredentialsAuthenticator) Start(_ context.Context, _ component.Host) error
• type Config
  • func (cfg *Config) Validate() error

Functions

func NewFactory

func NewFactory() component.ExtensionFactory

NewFactory creates a factory for the OIDC Authenticator extension.

Types

type ClientCredentialsAuthenticator

type ClientCredentialsAuthenticator struct {
	// contains filtered or unexported fields
}

ClientCredentialsAuthenticator provides implementation for providing client authentication using OAuth2 client credentials workflow for both gRPC and HTTP clients.

func (*ClientCredentialsAuthenticator) PerRPCCredentials

func (o *ClientCredentialsAuthenticator) PerRPCCredentials() (credentials.PerRPCCredentials, error)

PerRPCCredentials returns gRPC PerRPCCredentials that supports "client-credential" OAuth flow. The underneath oauth2.clientcredentials.Config instance will manage tokens performing auto refresh as necessary.

func (*ClientCredentialsAuthenticator) RoundTripper

func (o *ClientCredentialsAuthenticator) RoundTripper(base http.RoundTripper) (http.RoundTripper, error)

RoundTripper returns oauth2.Transport, an http.RoundTripper that performs "client-credential" OAuth flow and also auto refreshes OAuth tokens as needed.

func (*ClientCredentialsAuthenticator) Shutdown

func (o *ClientCredentialsAuthenticator) Shutdown(_ context.Context) error

Shutdown for ClientCredentialsAuthenticator extension does nothing

func (*ClientCredentialsAuthenticator) Start

func (o *ClientCredentialsAuthenticator) Start(_ context.Context, _ component.Host) error

Start for ClientCredentialsAuthenticator extension does nothing

type Config

type Config struct {
	config.ExtensionSettings `mapstructure:",squash"`

	// ClientID is the application's ID.
	// See https://datatracker.ietf.org/doc/html/rfc6749#section-2.2
	ClientID string `mapstructure:"client_id"`

	// ClientSecret is the application's secret.
	// See https://datatracker.ietf.org/doc/html/rfc6749#section-2.3.1
	ClientSecret string `mapstructure:"client_secret"`

	// TokenURL is the resource server's token endpoint
	// URL. This is a constant specific to each server.
	// See https://datatracker.ietf.org/doc/html/rfc6749#section-3.2
	TokenURL string `mapstructure:"token_url"`

	// Scope specifies optional requested permissions.
	// See https://datatracker.ietf.org/doc/html/rfc6749#section-3.3
	Scopes []string `mapstructure:"scopes,omitempty"`

	// TLSSetting struct exposes TLS client configuration for the underneath client to authorization server.
	TLSSetting configtls.TLSClientSetting `mapstructure:"tls,omitempty"`

	// Timeout parameter configures `http.Client.Timeout` for the underneath client to authorization
	// server while fetching and refreshing tokens.
	Timeout time.Duration `mapstructure:"timeout,omitempty"`
}

Config stores the configuration for OAuth2 Client Credentials (2-legged OAuth2 flow) setup.

func (*Config) Validate

func (cfg *Config) Validate() error

Validate checks if the extension configuration is valid