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_EDGE_CONTAINER_ENDPOINT=... overrides the EndpointOption (which defaults to "edgecontainer.googleapis.com") used by MakeEdgeContainerConnection().
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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14 UTC."],[[["\u003cp\u003eThe latest version of the edgecontainer environment is \u003ccode\u003e2.37.0-rc\u003c/code\u003e, and multiple prior versions are also available, including all the way down to \u003ccode\u003e2.11.0\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eEnvironment variables can be leveraged to adjust the library's operation, particularly beneficial during troubleshooting.\u003c/p\u003e\n"],["\u003cp\u003eThe endpoint for the edge container, which defaults to "edgecontainer.googleapis.com", can be overridden using the \u003ccode\u003eGOOGLE_CLOUD_CPP_EDGE_CONTAINER_ENDPOINT\u003c/code\u003e environment variable.\u003c/p\u003e\n"],["\u003cp\u003eTracing for gRPC calls can be activated by setting the \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc\u003c/code\u003e environment variable, allowing for the printing of each request and response.\u003c/p\u003e\n"],["\u003cp\u003eLogging can be enabled in the library by setting the \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_CLOG=yes\u003c/code\u003e environment variable, allowing logging output to be displayed.\u003c/p\u003e\n"]]],[],null,[]]
