When we run dozens or hundreds of containers in production, hopefully on a clustered container platform, it soon becomes difficult and tedious to read, search, and process logs—just like it was before when containers with services ran on dozens or hundreds of physical or virtual servers. The problem is that traditional solutions don't work out of the box to handle Docker logs. Luckily, AWS has a nice and easy log-aggregating service, named AWS CloudWatch. Docker has a logging driver just for it. We'll send our Tomcat logs to it right away!