进入docker中的logstash 容器内：

jelex@bogon ~ % docker exec -it 7ee8960c99a31e607f346b2802419b8b819cc860863bc283cb7483bc03ba1420 /bin/sh
$ pwd
/usr/share/logstash
$ ls
bin	CONTRIBUTORS  Gemfile	    jdk  logstash-core		   modules   tools   x-pack
config	data	      Gemfile.lock  lib  logstash-core-plugin-api  pipeline  vendor
$ cd bin
$ ls
benchmark.bat	     ingest-convert.bat  logstash-keystore	logstash-plugin.bat  pqrepair.bat
benchmark.sh	     ingest-convert.sh	 logstash-keystore.bat	pqcheck		     ruby
cpdump		     logstash		 logstash.lib.sh	pqcheck.bat	     setup.bat
dependencies-report  logstash.bat	 logstash-plugin	pqrepair	     system-install

安装插件：

$ logstash-plugin install logstash-codec-json_lines

logstash优化：官方的建议是提高每次批处理的数量，调节传输间歇时间。当batch.size增大，es处理的事件数就会变少，写入也就越快了
vim /etc/logstash/pipeline.yml

pipeline线程数，官方建议是等于CPU内核数

pipeline.workers: 24

实际output时的线程数

pipeline.output.workers: 24

每次发送的事件数

pipeline.batch.size: 10000

发送延时（ms）

pipeline.batch.delay: 10