Using logstash for email alert - email

Question

I installed logstash 5.5.2 in our windows server and I would like to send an email alert when I identify some sentences.
My output section is the following:
output {
tcp {
host => "host.com"
port => 1234
codec => "json_lines"
}
if "The message was Server with id " in [log_message] {
email {
to => "<myName#company.com>"
from => "<otherName#company.com>"
subject => "Issue appearance"
body => "The input is: %{incident}"
domain => "smtp.intra.company.com"
port => 25
#via => "smtp"
}
}
}
During my debug I got the following messages:
[2017-09-11T13:19:39,181][ERROR][logstash.plugins.registry] Problems loading a plugin with {:type=>"output", :name=>"email", :path=>"logstash/outputs/email", :error_message=>"NameError", :error_class=>NameError
[2017-09-11T13:19:39,186][DEBUG][logstash.plugins.registry] Problems loading the plugin with {:type=>"output", :name=>"email"}
[2017-09-11T13:19:39,195][ERROR][logstash.agent ] Cannot create pipeline {:reason=>"Couldn't find any output plugin named 'email'. Are you sure this is correct? Trying to load the email output plugin resulted in this error: Problems loading the requested plugin named email of type output.
Which I guess says that I don't have the email plugin installed.
Can someone suggest a way to fix this?
Using another solution is not an option, just in case that someone suggests it.
Thanks and regards,
Fotis

Answer 1

I tried to follow the instructions in the official documentation
But the option of creating an offline plugin pack didn't work.
So what I did, was to create a running logstash instance on my client, run the command to install the output-email plugin logstash-plugin install logstash-output-email and afterwards I copied this instance on my server(which had no internet access).