Logstash could
not be started because there is already another instance
using the configured data
directory. If you wish
to run multiple instances, you must change
the "path.data" setting.
需要指定你的path.data, 进入你的bin目录下,输入
./logstash -f config-mysql –path.data=/var/log
或者
./logstash -f config-mysql –path.data=/root/
