如何在App Engine Flex Java环境中使用Stackdriver Structured日志记录

Question

Google App Engine flexible environment automatically pipes stdout and stderr to Stackdriver (Google Cloud Logging). But this only supports plain text log message without any metadata (not even logging levels).

I found Logback appender for google cloud logging.

https://cloud.google.com/logging/docs/setup/java

But this does not seem to support structured logging yet. And also, it makes GRPC calls for every log entry under the hood. So, I wonder how scalable it is (especially compare to current app engine structure which has separate Fluentd agent handles logs).

Is there any out of box or simple solution to send structured log from App Engine to Stackdriver?

Answer 1

It's quite possible to do structured logging in StackDriver logging. In fact, each individual log entry uses the LogEntry structure . As you can see it includes severity and metadata.

According to the App Engine documentation , the following logs are provided out of the box:

Request logs record requests sent to all App Engine apps. The request log is provided by default and you cannot opt out of receiving it.

App logs record activity by software within the App Engine app. The log is provided by default and you cannot opt out of receiving it.

Runtime logs are provided from the flexible environment using a preinstalled Logging agent.