Cloud Native Architectural Models using Archi. Contains models for CAAS, Cloud Native Applications, 12/15 Factor Applications with CI/CD/CS, monitoring and log management. Infrastructure components include Red Hat OpenShift, Red Hat Storage, Red Hat Ansible Tower, Red Hat Cloudforms, Red Hat Satellite, Red Hat JBoss Middleware.
You can further expand this by adding a Traffic Manager in the mix (Dynamic DNS). This will help by having the *.apps.example.com domain "fail over" to the warm standby for you.
There are a lot of offerings but these are the popular ones.