add option to propagate binaries without access to internet

[koroglusaban]

its allow to download binary from own store

[paulfantom]

Please fix issues reported by Travis CI: https://travis-ci.com/cloudalchemy/ansible-node-exporter/jobs/258266272#L280-L288 and add molecule tests. Everything can be found in cloudalchemy/ansible-prometheus#239

[koroglusaban]

Styling errors are fixed

[paulfantom]

Great job on fixing errors. 👍

This still needs molecule tests before it is merged.

[koroglusaban]

is this molecule check
https://travis-ci.com/cloudalchemy/ansible-node-exporter/builds/137379386

[paulfantom]

This is our CI output of molecule tests. You can run those locally by following https://github.com/cloudalchemy/ansible-node-exporter#local-testing.

What we need is to extend those to cover feature included in this PR, same way as it is happening in cloudalchemy/ansible-prometheus#239

[koroglusaban]

moleculetest-ansible-node-exporter.txt

[paulfantom]

Sorry, but I don't know what I have to do with this file.

I was saying about adding molecule tests in code to this PR. Things like this:

• https://github.com/cloudalchemy/ansible-prometheus/blob/dc277d8db3c8d0682f4b2a9fc98df0cba7993938/molecule/alternative/prepare.yml
• https://github.com/cloudalchemy/ansible-prometheus/blob/dc277d8db3c8d0682f4b2a9fc98df0cba7993938/molecule/alternative/playbook.yml

---

Additionally. I just noticed that this PR is adding new variable to defaults/main.yml. This needs to be reflected in README.md file in Role Variables section.

[paulfantom]

Closing as this was already done in #126