elasticsearch fix

elasticsearch_fix.md

First install java, elastic have problem if it's not installed

apt install openjdk-8-jre-headless

now install

apt install elasticsearch

stop elastic

service elasticsearch stop

edit /usr/lib/systemd/system/elasticsearch.service and add

LimitMEMLOCK=infinity

edit /etc/elasticsearch/jvm.options and change

-Xms1g
-Xmx1g

with your values, for example

-Xms4g
-Xmx4g

then reload systemd with

systemctl daemon-reload

start elastic

systemctl start elasticsearch