A set of Ansible playbooks for:

  o installing a base Greenstone3 system where the tomcat server
    is accessed directly over http

  o hardening the installation to run over https through an Apache2
    web server using a certificate issued by Let's Encrypt.


If the necessary repo for Ansible is already present, then
installation is as straightforward as:

    sudo apt-get install ansible
Or
    sudo yum install ansible

To add the repo on Debian systems:

    sudo apt update
    sudo apt install software-properties-common
    sudo add-apt-repository --yes --update ppa:ansible/ansible
    sudo apt install ansible

To add on Redhat:

    sudo subscription-manager repos --enable ansible-2.9-for-rhel-8-x86_64-rpms
    sudo yum install ansible
Or
    sudo subscription-manager repos --enable rhel-7-server-ansible-2.9-rpms
    sudo yum install ansible

depending on whether RHEL7 or RHEL8.

NEXT, review and edit as needed the variables in:

    vars/default-core.xml

Then run the Ansible playbooks in the following order:

    ./01-RUN-ANSIBLE-BASE-INSTALL.sh
    
    ./02-RUN-ANSIBLE-REVPROXY.sh

====

Misc extra notes:

This Ansible playbook installs an Apache2 web server and Let's
Encrypt's certbot command-line tool (if not already present), and then
proceeds to configure Apache2 so it acts as a reverse-proxy web server
for a Greenston3 Tomcat installation.


In developing these playbooks, the following resources were consulted:

  https://github.com/do-community/ansible-playbooks/tree/master
  https://github.com/mvarian/certbot-apache/tree/master