Access logging

    • Customizable access log filters that allow different types of requests and responses to be written to different access logs.

    Downstream connection access logging can be enabled using listener access logs. The listener access logs complement HTTP request access logging and can be enabled separately and independently from filter access logs.

    Envoy supports several built-in and extension filters that are registered at runtime.

    Envoy supports pluggable access logging sinks. The currently supported sinks are:

    • Customizable access log formats using predefined fields as well as arbitrary HTTP request and response headers.

    • Envoy can send access log messages to a gRPC access logging service.

    • Asynchronous IO flushing architecture. Access logging will never block the main network processing threads.

    • Customizable access log formats using predefined fields as well as arbitrary HTTP request and response headers.

    • Writes to the standard output of the process. It works in all platforms.

    • Writes to the standard error of the process. It works in all platforms.