I plan on playing with the microservices from the tutorial more in the near
future. I could:
1) Load test one microservice without stdout logging
2) Load test with stdout logging
3) See if there is any response degradation recorded by zipkin
Would be nice to see if Prometheus records any additional overhead as well
(Next tutorial).
Once I get the setup I'll ping back.
IIUC the reason we are logging to stdout in docker containers is just so we can
see the logging output when running the container during development. We fire
up the container and do some sanity testing with cURL and look at the log
output with docker logs or docker compose logs.
Once we are happy we can turn off the logging to standard out and do file based
logging or something more advanced with ELK and Zipkin.
Perhaps the docker layer handling the stdout stream is slow or that managing
the buffer it uses is a performance bottle neck.
Cheers,
Ole
On 04/03/2018 04:25 PM, Ralph Goers wrote:
Thanks. That is helpful but it still doesn’t answer the question I was asking,
although it does provide good documentation on what people are recommending for
how to configure applications for the cloud.
Testing at Log4j has shown that writing to stdout is magnitudes slower than
logging to a file, even when stdout is redirected to a file. What I am
wondering, and still haven’t found an answer to, is whether this performance
degradation is present when a Java app is running in a docker container and
logs to stdout.
Ralph
On Apr 3, 2018, at 11:44 AM, Ole Ersoy <ole.er...@gmail.com> wrote:
I accidentally deleted the original thread, but saw that there were some
questions surrounding logging to stdout (I assume while running in a
microservice dockerized environment).
You might find these article helpful:
http://callistaenterprise.se/blogg/teknik/2017/07/29/building-microservices-part-7-distributed-tracing/
http://callistaenterprise.se/blogg/teknik/2017/09/13/building-microservices-part-8-logging-with-ELK/
These cover log event collection for both ELK and Zipkin. Parts 1-6 in the
series are really good as well if you want to know more about microservices and
security in general with the Spring and Netflix OSS stack. Originally came
across it while looking for OAuth material.
Cheers,
Ole
