Logstash send data to php

Elastic Stack Logstash
1

Hi,
Im trying to send my data to a php input, but i have a few questions:

Here's my config:

> input {
>         tcp {
>                 port => 8443
>                 codec => json_lines { charset => CP1252 }
>                 }
> }
> filter
> {
> ruby { code => 'event.set("logmessage", Base64.encode64(event.get("Message")))' }
> ruby { code => 'event.set("device", Base64.encode64(event.get("host")))' }
> ruby { code => 'event.set("sev", Base64.encode64(event.get("Severity")))' }
> ruby { code => 'event.set("tagpath", Base64.encode64(event.get("tag_filepath")))' }
> ruby { code => 'event.set("appname", Base64.encode64(event.get("ApplicationName")))' }
> }
> output {
> if [ApplicationName] == "OASIS"
> {
> elasticsearch {
>     hosts => ["10.16.5.2:9200"]
>     user => "elastic"
>     password => "elk@123"
>     index => "apps"
> }
> }
> else
> {
> elasticsearch {
>     hosts => ["10.16.5.2:9200"]
>     user => "elastic"
>     password => "changeme"
>     index => "errors"
> }
> }
> if [Severity] == "Error"
> {
> exec
> {
> command => "php tcp.php %{logmessage} %{$device} %{sev} %{tagpath} %{appname}"
> }
> }
> stdout { codec => rubydebug }
> }

My php send these ina json format to an api url.

  1. I tried to encode the fields with base64 in ruby.
    since my command is

> php /etc/logstash/conf.d/tcp.php %{logmessage} %{$device} %{sev} %{tagpath} %{appname}

if the message is something like this:

> 2020-01-01 23:45:45,034 Failed to reload application URL

then the spaces might be taken wrongly as next element as

    > logmessage: 2020-01-01
    > device: 23:45:45:,034 
    > and so on., which is not my expectation.

Is this a fair expectation and if yes, is my encoding method right?

  1. After i did this, no data has been sent to the url.
    I tested my php on command line with sample inputs, which worked fine.
    What am i missing?

Please provide me your suggestions and help.

2

Can you show an example of an event output using rubydebug?

BTW, you set the field [device] but reference [$device]

3

@badger,
Noted, Thank you!
My logstash output is something like this,
I mapped my output to a file and got this. The messages may always vary, but here it goes.

> {"@version":"1","host":"strproelk03","message":"Retrying 99.61 - - [12/May/2020:23:24:06 -0600] \"GET /robots.txt HTTP/1.1\" 404 443 208","ApplicationName":"Oasis","Severity":"ERROR","@timestamp":"2020-05-16T19:46:25.908Z","tagfile_path":"/etc/logstash/conf.d/nodejs/node.log","EventReceivedTime":"2020-05-16T19:46:25.908Z"}

4

Firstly, "ERROR" != "Error", so that message would not go to the exec output. Secondly, that event has a [message] field, but not a [Message] field.

5

@Badger thank you very much! Corrected ERROR, device and Message to match the same as my inputs. Is the ruby filter done right?

6

It looks reasonable to me. Although I would do it all in one filter...

ruby {
    code => '
        event.set("logmessage", Base64.encode64(event.get("Message")))
        event.set("device", Base64.encode64(event.get("host")))
        event.set("sev", Base64.encode64(event.get("Severity")))
        event.set("tagpath", Base64.encode64(event.get("tag_filepath")))
        event.set("appname", Base64.encode64(event.get("ApplicationName")))
    '
}
8

@Badger,
I think the data in the ruby fields is not getting added. i dont see them in Es.
Should the calling of the column be any different as [message] or anything?

is there a different usage for my data push? I think something is wrong here in this case.

`

command => "php tcp.php %{logmessage} %{$device} %{sev} %{tagpath} %{appname}"

`

I tried sending data directly from my php file,
as

php tcp.php messagesample deveice1 error /elk logstash

and this sent the message successfully.

Please help me resolve this.

9

Update: I see the data in ES, but sill not passed to the php file.
@Badger

10

Enable loglevel debug and check the logstash logs to see what stderr and stdout look like when the command is exec'd.

11

@Badger I think i found the issue,
For some reason, it is not taking up un manipulated fields.

So I did a mutate gsub just as with no reason to remove some slashes, etc.
Once It flowed through it, i was able to get this successful.

weirdly, that's how it worked out for me!

Thank you for helping me out figure this all out! :slight_smile:

Katara!