An example Ansible role that installs haproxy and keepalived to provide high-availability. keepalived monitors for the presence of an haproxy pid and will cause the VIP to point to a different host.
This role also has an example of how to test roles that require multiple hosts. Running molecule test will provision 2 nodes using vagrant (Virtualbox), provision the nodes using Ansible, then run tests by interacting with both nodes.
See defaults/main.yml for an explanation of the variables.
See the included molecule playbook and test for an example of how to use the role.
BSD
Use virtualenv with requirements.txt to install the requirements
in an isolated workspace.
virtualenv .venv
source .venv/bin/activate
pip install -r requirements.txt