service

Documentation

Overview

Package service represents the agent's core remoteconfig service

The `Service` type provides a communication layer for downstream clients to request configuration, as well as the ability to track clients for requesting complete update payloads from the remote config backend.

Index

• func WithAPIKey(apiKey string) func(s *options)
• func WithAgentPollLoopDisabled() func(s *options)
• func WithClientCacheBypassLimit(limit int, cfgPath string) func(s *options)
• func WithClientTTL(interval time.Duration, cfgPath string) func(s *options)
• func WithConfigRootOverride(site string, override string) func(s *options)
• func WithDatabaseFileName(fileName string) func(s *options)
• func WithDatabasePath(path string) func(s *options)
• func WithDirectorRootOverride(site string, override string) func(s *options)
• func WithMaxBackoffInterval(interval time.Duration, cfgPath string) func(s *options)
• func WithRcKey(rcKey string) func(s *options)
• func WithRefreshInterval(interval time.Duration, cfgPath string) func(s *options)
• func WithTraceAgentEnv(env string) func(s *options)
• type AgentMetadata
• type ConfigFileMetaCustom
• type CoreAgentService
  • func NewService(cfg model.Reader, rcType, baseRawURL, hostname string, ...) (*CoreAgentService, error)
  • func (s *CoreAgentService) ClientGetConfigs(_ context.Context, request *pbgo.ClientGetConfigsRequest) (*pbgo.ClientGetConfigsResponse, error)
  • func (s *CoreAgentService) ConfigGetState() (*pbgo.GetStateConfigResponse, error)
  • func (s *CoreAgentService) Start()
  • func (s *CoreAgentService) Stop() error
• type HTTPClient
  • func NewHTTPClient(runPath, site, apiKey, agentVersion string) (*HTTPClient, error)
  • func (c *HTTPClient) Close() error
  • func (c *HTTPClient) GetCDNConfigUpdate(ctx context.Context, products []string, ...) (*state.Update, error)
• type Option
• type RcTelemetryReporter
• type Service

Functions

func WithAPIKey

func WithAPIKey(apiKey string) func(s *options)

WithAPIKey sets the service API key

func WithAgentPollLoopDisabled

func WithAgentPollLoopDisabled() func(s *options)

WithAgentPollLoopDisabled disables the config poll loop

func WithClientCacheBypassLimit

func WithClientCacheBypassLimit(limit int, cfgPath string) func(s *options)

WithClientCacheBypassLimit validates and sets the service client cache bypass limit

func WithClientTTL

func WithClientTTL(interval time.Duration, cfgPath string) func(s *options)

WithClientTTL validates and sets the service client TTL

func WithConfigRootOverride

func WithConfigRootOverride(site string, override string) func(s *options)

WithConfigRootOverride sets the service config root override

func WithDatabaseFileName

func WithDatabaseFileName(fileName string) func(s *options)

WithDatabaseFileName sets the service database file name

func WithDatabasePath

func WithDatabasePath(path string) func(s *options)

WithDatabasePath sets the service database path

func WithDirectorRootOverride

func WithDirectorRootOverride(site string, override string) func(s *options)

WithDirectorRootOverride sets the service director root override

func WithMaxBackoffInterval

func WithMaxBackoffInterval(interval time.Duration, cfgPath string) func(s *options)

WithMaxBackoffInterval validates sets the service maximum retry backoff time

func WithRcKey

func WithRcKey(rcKey string) func(s *options)

WithRcKey sets the service remote configuration key

func WithRefreshInterval

func WithRefreshInterval(interval time.Duration, cfgPath string) func(s *options)

WithRefreshInterval validates and sets the service refresh interval

func WithTraceAgentEnv

func WithTraceAgentEnv(env string) func(s *options)

WithTraceAgentEnv sets the service trace-agent environment variable

Types

type AgentMetadata

type AgentMetadata struct {
	Version      string    `json:"version"`
	APIKeyHash   string    `json:"api-key-hash"`
	CreationTime time.Time `json:"creation-time"`
}

AgentMetadata is data stored in bolt DB to determine whether or not the agent has changed and the RC cache should be cleared

type ConfigFileMetaCustom

type ConfigFileMetaCustom struct {
	Predicates *pbgo.TracerPredicates `json:"tracer-predicates,omitempty"`
	Expires    int64                  `json:"expires"`
}

ConfigFileMetaCustom is the custom metadata of a config

type CoreAgentService

type CoreAgentService struct {
	Service
	// contains filtered or unexported fields
}

CoreAgentService fetches Remote Configurations from the RC backend

func NewService

func NewService(cfg model.Reader, rcType, baseRawURL, hostname string, tagsGetter func() []string, telemetryReporter RcTelemetryReporter, agentVersion string, opts ...Option) (*CoreAgentService, error)

NewService instantiates a new remote configuration management service

func (*CoreAgentService) ClientGetConfigs

func (s *CoreAgentService) ClientGetConfigs(_ context.Context, request *pbgo.ClientGetConfigsRequest) (*pbgo.ClientGetConfigsResponse, error)

ClientGetConfigs is the polling API called by tracers and agents to get the latest configurations

func (*CoreAgentService) ConfigGetState

func (s *CoreAgentService) ConfigGetState() (*pbgo.GetStateConfigResponse, error)

ConfigGetState returns the state of the configuration and the director repos in the local store

func (*CoreAgentService) Start

func (s *CoreAgentService) Start()

Start the remote configuration management service

func (*CoreAgentService) Stop

func (s *CoreAgentService) Stop() error

Stop stops the refresh loop and closes the on-disk DB cache

type HTTPClient

type HTTPClient struct {
	Service
	// contains filtered or unexported fields
}

HTTPClient fetches Remote Configurations from an HTTP(s)-based backend

func NewHTTPClient

func NewHTTPClient(runPath, site, apiKey, agentVersion string) (*HTTPClient, error)

NewHTTPClient creates a new HTTPClient that can be used to fetch Remote Configurations from an HTTP(s)-based backend It uses a local db to cache the fetched configurations. Only one HTTPClient should be created per agent. An HTTPClient must be closed via HTTPClient.Close() before creating a new one.

func (*HTTPClient) Close

func (c *HTTPClient) Close() error

Close closes the HTTPClient and cleans up any resources. Close must be called before any other HTTPClients are instantiated via NewHTTPClient

func (*HTTPClient) GetCDNConfigUpdate

func (c *HTTPClient) GetCDNConfigUpdate(
	ctx context.Context,
	products []string,
	currentTargetsVersion, currentRootVersion uint64,
	cachedTargetFiles []*pbgo.TargetFileMeta,
) (*state.Update, error)

GetCDNConfigUpdate returns any updated configs. If multiple requests have been made in a short amount of time, a cached response is returned. If RC has been disabled, an error is returned. If there is no update (the targets version is up-to-date) nil is returned for both the update and error.

type Option

type Option func(s *options)

Option is a service option

type RcTelemetryReporter

type RcTelemetryReporter interface {
	// IncRateLimit is invoked when a cache bypass request is prevented due to rate limiting
	IncRateLimit()
	// IncTimeout is invoked when a cache bypass request is cancelled due to timeout or a previous cache bypass request is still pending
	IncTimeout()
}

RcTelemetryReporter should be implemented by the agent to publish metrics on exceptional cache bypass request events

type Service

type Service struct {
	sync.Mutex
	// contains filtered or unexported fields
}

Service defines the remote config management service responsible for fetching, storing and dispatching the configurations