A number of environment variables can be used to configure the behavior of the library. There are also functions to configure this behavior in code. The environment variables are convenient when troubleshooting problems.
Endpoint Overrides
GOOGLE_CLOUD_CPP_CLOUD_REDIS_CLUSTER_ENDPOINT=... overrides the EndpointOption (which defaults to "redis.googleapis.com") used by MakeCloudRedisClusterConnection().
GOOGLE_CLOUD_CPP_CLOUD_REDIS_ENDPOINT=... overrides the EndpointOption (which defaults to "redis.googleapis.com") used by MakeCloudRedisConnection().
GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc: turns on tracing for most gRPC calls. The library injects an additional Stub decorator that prints each gRPC request and response. Unless you have configured your own logging backend, you should also set GOOGLE_CLOUD_CPP_ENABLE_CLOG to produce any output on the program's console.
See Also
google::cloud::LoggingComponentsOptionGOOGLE_CLOUD_CPP_TRACING_OPTIONS=...: modifies the behavior of gRPC tracing, including whether messages will be output on multiple lines, or whether string/bytes fields will be truncated.
See Also
google::cloud::GrpcTracingOptionsOptionGOOGLE_CLOUD_CPP_ENABLE_CLOG=yes: turns on logging in the library, basically the library always "logs" but the logging infrastructure has no backend to actually print anything until the application sets a backend or they set this environment variable.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14 UTC."],[[["\u003cp\u003eThis page lists various versions of the Redis environment documentation, ranging from version 2.11.0 to the latest release candidate 2.37.0-rc.\u003c/p\u003e\n"],["\u003cp\u003eEnvironment variables can be utilized to customize the library's behavior, offering a convenient way to troubleshoot issues or modify settings.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eGOOGLE_CLOUD_CPP_CLOUD_REDIS_ENDPOINT\u003c/code\u003e and \u003ccode\u003eGOOGLE_CLOUD_CPP_CLOUD_REDIS_CLUSTER_ENDPOINT\u003c/code\u003e can be used to override the default endpoint for \u003ccode\u003eMakeCloudRedisConnection()\u003c/code\u003e and \u003ccode\u003eMakeCloudRedisClusterConnection()\u003c/code\u003e, respectively.\u003c/p\u003e\n"],["\u003cp\u003eTracing for gRPC calls can be enabled using \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc\u003c/code\u003e, with \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_CLOG\u003c/code\u003e needing to be set for console output, and \u003ccode\u003eGOOGLE_CLOUD_CPP_TRACING_OPTIONS\u003c/code\u003e for modifying the tracing output behavior.\u003c/p\u003e\n"],["\u003cp\u003eSetting \u003ccode\u003eGOOGLE_CLOUD_PROJECT\u003c/code\u003e will configure the project for examples and tests, but does not affect the behaviour of the library itself.\u003c/p\u003e\n"]]],[],null,[]]
