Elasticsearch Ansible Role, why does it install openjdk-7-jre-headless on Debian, when docs specify Oracle Java 8 JDK?

Elastic Stack Elasticsearch
1

Continuing the discussion from Ansible Role for Elasticsearch now available!:

I have many clusters running ES v1.x which were deployed by my own Ansible playbooks, which originated in the old Traackr version (https://github.com/Traackr/ansible-elasticsearch)

I have a new v2.2 cluster (testing for migration) and used the new 'official' role from https://github.com/elastic/ansible-elasticsearch

Everything is on Ubuntu 14.04 (trusty) at the moment.

During testing I was surprised to discover that the elasticsearch role java.yml task installed openjdk-7-jre-headless since the docs say to use Oracle JDK 8:

...as of this writing, it is recommended that you use the Oracle JDK version 1.8.0_73

https://www.elastic.co/guide/en/elasticsearch/reference/current/_installation.html

(That's in vars/Debian.yml, the alternate vars/Redhat.yml specifies java-1.8.0-openjdk.x86_64)

I'm wondering what the motivation is in the Ansible for installing versions contrary to in-house recommendations. :confused:

Generally wondering, is this simply a question of what can be found in the Debian/Ubuntu repos?

But specifically wondering, should I modify that section to install Oracle 8 (I'm thinking yes).

I am concerned that there are Java args or environment settings hard-coded elsewhere in the Ansible role which presume OpenJDK... :confused:

Will dig, but wondering!

best regards,
aaron

2

It's a recommendation, not a requirement.
Plus there is no openjdk 8 in base 14.04.

3

Certainly...

...but I still ask, why not ship an installer that uses the recommended (Oracle) version?

4

Because not everyone is willing to agree to the Oracle license, so we don't force it on people.
This behaviour aligns with our other automation packages too.

5

Thanks, got it.