[package] Add logstash

[zbal]

Can not really require to install docker for that purpose, need to get:

• logstash,
• elasticsearch,
• java
• nginx for kibana

Yet - this is quite edge case, should we consider that as a collection rather than a service? This is closer to an app than a service really...

@JuhaS @hunvreus - thoughts ?

I may simply don't bother for the moment...

[hunvreus]

What's that one for? Not sure I understand. Is this the logstash package?

[zbal]

Yes, it would be for the logstash package.

I was simply reviewing the software / services we use on a regular basis. As mentioned, logstash, despite running as a service is closer to an app that a real service per se so it's not yet on the priority list.

However it still raise the question of services dependencies.

Elasticsearch is a similar service / app; despite running as a service, having a service type configuration, it is still built on top of another technology (java) and such technology need to be installed as a dependency. In the case of elasticsearch, it is a bit different as java is required on the same box and we can have that 1to1 mapping and force the setup of java before the setup of ES; logstash however is a bit different as its setup can be spread on multiple boxes - it embeds ES, but could run with ES somewhere else, it embeds kibana that can either be served from the high port of logstash, or proxied by nginx, etc...

[hunvreus]

The question you should ask yourself is; is this a technology? If not, it's likely to be an app. Logstash is an aggregate of several technologies, put together into a usable application.

[zbal]

It's why I tend to consider it more as an app than a service currently and am not moving forward much on this.

We'll include such app as a supported / templated app later on.

[zbal]

dropping.