For those who are struggeling with the install of plugins and having them install on spinning up a container I have wrote this
mount the file from your volumn outside the container
to Container Path: /usr/share/logstash/config/plugins.sh
add a post argument
sh /usr/share/logstash/config/plugins.sh
file contents
#!binbash
echo running post install scripts for plugins..;
logstash-plugin install logstash-filter-sentimentalizer
logstash-plugin install logstash-input-mysql
echo finished post install scripts for plugins..;
sleep 1
exec logstash
the exec logstash is what kicks logstash into starting after the plugin installs.