WIP: Add install prometheus playbook

[erikzenker]

Tried to install prometheus form galaxy but failed when unpacking:

TASK [cloudalchemy.prometheus : download prometheus binary to local folder] *************************************************
ok: [127.0.0.1 -> localhost]

TASK [cloudalchemy.prometheus : unpack prometheus binaries] *****************************************************************
fatal: [127.0.0.1 -> localhost]: FAILED! => {"changed": false, "msg": "Could not find or access '/tmp/prometheus-2.22.0.linux-amd64.tar.gz' on the Ansible Controller.\nIf you are using a module and expect the file to exist on the remote, see the remote_src option"}

Seems to me that it does not download properly.

[juwi]

Please look into which interfaces services are then accessible from.