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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
https://grpc.io/
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79 lines
3.3 KiB
79 lines
3.3 KiB
gRPC environment variables |
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gRPC C core based implementations (those contained in this repository) expose |
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some configuration as environment variables that can be set. |
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* GRPC_ABORT_ON_LEAKS |
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A debugging aid to cause a call to abort() when gRPC objects are leaked past |
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grpc_shutdown(). Set to 1 to cause the abort, if unset or 0 it does not |
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abort the process. |
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* GOOGLE_APPLICATION_CREDENTIALS |
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The path to find the credentials to use when Google credentials are created |
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* GRPC_SSL_CIPHER_SUITES |
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A colon separated list of cipher suites to use with OpenSSL |
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Defaults to: |
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ECDHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES256-GCM-SHA384 |
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* GRPC_DEFAULT_SSL_ROOTS_FILE_PATH |
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PEM file to load SSL roots from |
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* GRPC_POLL_STRATEGY [posix-style environments only] |
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Declares which polling engines to try when starting gRPC. |
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This is a comma-separated list of engines, which are tried in priority order |
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first -> last. |
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Available polling engines include: |
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- epoll (linux-only) - a polling engine based around the epoll family of |
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system calls |
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- poll - a portable polling engine based around poll(), intended to be a |
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fallback engine when nothing better exists |
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- legacy - the (deprecated) original polling engine for gRPC |
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* GRPC_TRACE |
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A comma separated list of tracers that provide additional insight into how |
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gRPC C core is processing requests via debug logs. Available tracers include: |
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- api - traces api calls to the C core |
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- bdp_estimator - traces behavior of bdp estimation logic |
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- call_error - traces the possible errors contributing to final call status |
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- channel - traces operations on the C core channel stack |
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- combiner - traces combiner lock state |
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- compression - traces compression operations |
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- connectivity_state - traces connectivity state changes to channels |
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- channel_stack_builder - traces information about channel stacks being built |
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- http - traces state in the http2 transport engine |
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- http1 - traces HTTP/1.x operations performed by gRPC |
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- flowctl - traces http2 flow control |
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- op_failure - traces error information when failure is pushed onto a |
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completion queue |
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- pending_tags - [debug builds only] traces still-in-progress tags on |
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completion queues |
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- round_robin - traces the round_robin load balancing policy |
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- glb - traces the grpclb load balancer |
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- queue_pluck |
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- queue_timeout |
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- server_channel - lightweight trace of significant server channel events |
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- secure_endpoint - traces bytes flowing through encrypted channels |
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- transport_security - traces metadata about secure channel establishment |
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- tcp - traces bytes in and out of a channel |
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'all' can additionally be used to turn all traces on. |
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Individual traces can be disabled by prefixing them with '-'. |
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Example: |
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export GRPC_TRACE=all,-pending_tags |
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* GRPC_VERBOSITY |
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Default gRPC logging verbosity - one of: |
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- DEBUG - log all gRPC messages |
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- INFO - log INFO and ERROR message |
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- ERROR - log only errors |
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* GRPC_DNS_RESOLVER |
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Declares which DNS resolver to use. The default is ares if gRPC is built with |
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c-ares support. Otherwise, the value of this environment variable is ignored. |
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Available DNS resolver include: |
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- native (default)- a DNS resolver based around getaddrinfo(), creates a new thread to |
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perform name resolution |
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- ares - a DNS resolver based around the c-ares library
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