How to process event which has *.1.* pattern

Elastic Stack Logstash
1

Experts:

I would like to drop all the events and process only those events which match .1. criteria in the message.

I have written as below but not working. Could you please help how to write using regex.

if [message] !~ /*.1.*/{
drop {}
}

I observed nothing is written to the elasticsearch index.

Any thoughts ?

2

* doesn't mean what you think it means, and periods must be escaped. Regular expression solution:

if [message] !~ /\.1\./ {

A probably quicker option:

if ".1." not in [message] {
3

Thank you for the info Magnus. It worked and resolved my issue and also saved time.

Thank you so much.