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_GAME_SERVER_CLUSTERS_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "gameservices.googleapis.com") used by MakeGameServerClustersServiceConnection().
GOOGLE_CLOUD_CPP_GAME_SERVER_CONFIGS_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "gameservices.googleapis.com") used by MakeGameServerConfigsServiceConnection().
GOOGLE_CLOUD_CPP_GAME_SERVER_DEPLOYMENTS_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "gameservices.googleapis.com") used by MakeGameServerDeploymentsServiceConnection().
GOOGLE_CLOUD_CPP_REALMS_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "gameservices.googleapis.com") used by MakeRealmsServiceConnection().
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::TracingComponentsOptionGOOGLE_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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-07-30 UTC."],[[["The library's behavior can be configured using environment variables or corresponding functions in the code, with environment variables being particularly useful for troubleshooting."],["Endpoint overrides for various game services can be set using environment variables like `GOOGLE_CLOUD_CPP_GAME_SERVER_CLUSTERS_SERVICE_ENDPOINT`, `GOOGLE_CLOUD_CPP_GAME_SERVER_CONFIGS_SERVICE_ENDPOINT`, `GOOGLE_CLOUD_CPP_GAME_SERVER_DEPLOYMENTS_SERVICE_ENDPOINT`, and `GOOGLE_CLOUD_CPP_REALMS_SERVICE_ENDPOINT`."],["Tracing for gRPC calls can be enabled via `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc`, which outputs gRPC requests and responses; it's often used in conjunction with `GOOGLE_CLOUD_CPP_ENABLE_CLOG`."],["The `GOOGLE_CLOUD_CPP_TRACING_OPTIONS` environment variable allows for modification of gRPC tracing behavior, including multi-line output and string/bytes truncation."],["Setting `GOOGLE_CLOUD_CPP_ENABLE_CLOG=yes` activates logging within the library, enabling the output of log data to a backend."]]],[]]
