envconfig

Documentation

Overview

Package envconfig contains grpc settings configured by environment variables.

Index

• Constants
• Variables

Constants

const (
	// XDSBootstrapFileNameEnv is the env variable to set bootstrap file name.
	// Do not use this and read from env directly. Its value is read and kept in
	// variable XDSBootstrapFileName.
	//
	// When both bootstrap FileName and FileContent are set, FileName is used.
	XDSBootstrapFileNameEnv = "GRPC_XDS_BOOTSTRAP"
	// XDSBootstrapFileContentEnv is the env variable to set bootstrap file
	// content. Do not use this and read from env directly. Its value is read
	// and kept in variable XDSBootstrapFileContent.
	//
	// When both bootstrap FileName and FileContent are set, FileName is used.
	XDSBootstrapFileContentEnv = "GRPC_XDS_BOOTSTRAP_CONFIG"
)

Variables

var (
	// TXTErrIgnore is set if TXT errors should be ignored ("GRPC_GO_IGNORE_TXT_ERRORS" is not "false").
	TXTErrIgnore = boolFromEnv("GRPC_GO_IGNORE_TXT_ERRORS", true)
	// RingHashCap indicates the maximum ring size which defaults to 4096
	// entries but may be overridden by setting the environment variable
	// "GRPC_RING_HASH_CAP".  This does not override the default bounds
	// checking which NACKs configs specifying ring sizes > 8*1024*1024 (~8M).
	RingHashCap = uint64FromEnv("GRPC_RING_HASH_CAP", 4096, 1, 8*1024*1024)
	// LeastRequestLB is set if we should support the least_request_experimental
	// LB policy, which can be enabled by setting the environment variable
	// "GRPC_EXPERIMENTAL_ENABLE_LEAST_REQUEST" to "true".
	LeastRequestLB = boolFromEnv("GRPC_EXPERIMENTAL_ENABLE_LEAST_REQUEST", false)
	// ALTSMaxConcurrentHandshakes is the maximum number of concurrent ALTS
	// handshakes that can be performed.
	ALTSMaxConcurrentHandshakes = uint64FromEnv("GRPC_ALTS_MAX_CONCURRENT_HANDSHAKES", 100, 1, 100)
	// EnforceALPNEnabled is set if TLS connections to servers with ALPN disabled
	// should be rejected. The HTTP/2 protocol requires ALPN to be enabled, this
	// option is present for backward compatibility. This option may be overridden
	// by setting the environment variable "GRPC_ENFORCE_ALPN_ENABLED" to "true"
	// or "false".
	EnforceALPNEnabled = boolFromEnv("GRPC_ENFORCE_ALPN_ENABLED", true)
	// XDSFallbackSupport is the env variable that controls whether support for
	// xDS fallback is turned on. If this is unset or is false, only the first
	// xDS server in the list of server configs will be used.
	XDSFallbackSupport = boolFromEnv("GRPC_EXPERIMENTAL_XDS_FALLBACK", false)
	// NewPickFirstEnabled is set if the new pickfirst leaf policy is to be used
	// instead of the exiting pickfirst implementation. This can be enabled by
	// setting the environment variable "GRPC_EXPERIMENTAL_ENABLE_NEW_PICK_FIRST"
	// to "true".
	NewPickFirstEnabled = boolFromEnv("GRPC_EXPERIMENTAL_ENABLE_NEW_PICK_FIRST", false)
)

var (
	// ObservabilityConfig is the json configuration for the gcp/observability
	// package specified directly in the envObservabilityConfig env var.
	//
	// This is used in the 1.0 release of gcp/observability, and thus must not be
	// deleted or changed.
	ObservabilityConfig = os.Getenv(envObservabilityConfig)
	// ObservabilityConfigFile is the json configuration for the
	// gcp/observability specified in a file with the location specified in
	// envObservabilityConfigFile env var.
	//
	// This is used in the 1.0 release of gcp/observability, and thus must not be
	// deleted or changed.
	ObservabilityConfigFile = os.Getenv(envObservabilityConfigFile)
)

var (
	// XDSBootstrapFileName holds the name of the file which contains xDS
	// bootstrap configuration. Users can specify the location of the bootstrap
	// file by setting the environment variable "GRPC_XDS_BOOTSTRAP".
	//
	// When both bootstrap FileName and FileContent are set, FileName is used.
	XDSBootstrapFileName = os.Getenv(XDSBootstrapFileNameEnv)
	// XDSBootstrapFileContent holds the content of the xDS bootstrap
	// configuration. Users can specify the bootstrap config by setting the
	// environment variable "GRPC_XDS_BOOTSTRAP_CONFIG".
	//
	// When both bootstrap FileName and FileContent are set, FileName is used.
	XDSBootstrapFileContent = os.Getenv(XDSBootstrapFileContentEnv)

	// C2PResolverTestOnlyTrafficDirectorURI is the TD URI for testing.
	C2PResolverTestOnlyTrafficDirectorURI = os.Getenv("GRPC_TEST_ONLY_GOOGLE_C2P_RESOLVER_TRAFFIC_DIRECTOR_URI")
)