问题
I would like to view the runtime and client logs generated by Fabric Composer but cannot find them. Can you please provide guidance on how to access the logs?.
回答1:
Runtime Logs
If you run docker ps -a you should see 3 running docker containers. One of the docker containers will be the chaincode container (where the Composer runtime is executing your logic).
It has a generated name something like: dev-vp0-4968dea9e3a69670235d9283859801ab5df6f18398f15711d6f5426123955f9f
Look for its container id, and then run docker logs <container id>
You can follow the logs using docker logs -f
If you are on the Mac you can also view the logs using the Kitematic GUI.
Fabric Composer log entries are tagged with [Concerto] (the old codename)
Client Logs
The client-side APIs (written in Node) can also generate logs. Set the DEBUG environment variable to enable debugging. E.g (for Linux and Mac):
export DEBUG=composer:*
INFO and higher log messages will be sent to stdout by default. All logs will also be logged to disk under a ./logs folder.
Please see the docs here: https://fabric-composer.github.io/problems/diagnostics.html
来源：https://stackoverflow.com/questions/42695751/how-do-i-see-the-logs-for-fabric-composer