Tomcat のアクセスログ
localhost_access_log.txt [03/Apr/2017:16:01:02 +0900] %d/%b/%Y:%H:%M:%S %z
Apache のアクセスログ
access_log [03/Apr/2017:16:01:02 +0900] %d/%b/%Y:%H:%M:%S %z
Apache のエラーログ
error_log [Mon Apr 03 16:53:21 2017] %a %b %d %H:%M:%S %Y
参考
http://docs.aws.amazon.com/ja_jp/AmazonCloudWatch/latest/logs/AgentReference.html
http://docs.aws.amazon.com/ja_jp/elasticbeanstalk/latest/dg/AWSHowTo.cloudwatchlogs.html
http://dev.classmethod.jp/cloud/cloudwatch-logs-apache/