prescriptive-data-project1

Prescriptive Data Project 1

Application layout

It is assumed that you have Minikube and Docker running and that you are running on a Mac or other Unix-like system.
App: host-monitor - this is where the application files are located. The Dockerfiles for the applications are here as well.
DB: The db directory pertains to the database for the application. The server directory has the nginx and flask backend files and the vue-frontend directory has the frontend Vue application files.
Scripts: scripts - Helper scripts are located here.

A few manual steps

Install Docker and minikube
Run setup script: ./scripts/setup.sh

add the hostname to your /etc/hosts.

echo "$(minikube ip) pdata.world" | sudo tee -a /etc/hosts

Run the minikube tunnel for ambassador.
```
minikube tunnel
```

Setup Development Environment

Tools for helping you setup the development environment are located in the scripts directory. Use the ./scripts/setup.sh before deploying.

Local Development

The application files are located in the host-monitor directory.

Kubernetes Deployment

The Kubernetes template files are located in the templates directory. Use the script in scripts/manage_deployment.sh for managing the deployment.

options:
--help           Show options for this script
--deploy-db      Deploy the database.
--deploy         Deploy the application.
--deploy-all     Deploy the entire application.
--delete         Delete the nginx deployment.
--delete-all     Delete entire deployment.
--scale          Scale the application - example: --scale 4

Demo

After running the setup script, run the following commands.

# First setup the database.
./scripts/manage_deployment.sh --deploy-db TRUE

# Double check that pg_hba.conf file has correct network.
# We assumed 172.17.0.0 and 10.0.0.0. If it's incorrect, correct it and restart postgres
pkill -HUP postgres

# This will deploy the application
./scripts/manage_deployment.sh --deploy TRUE

Viewing the UI

At this point, open a browser at pdata.world. The hosts should now be visible. The page should automatically update if you scale the application.

Scale

./scripts/manage_deployment.sh --scale 4

Delete the application.

./scripts/manage_deployment.sh --delete TRUE

TODO

Possible improvements
- mount your desired pg_hba file as a config map. This will eliminate the manual step of updating it.
- Setup a hook so that each pod remove their entry from the db before shutting down.
- Add vault to the application to store secrets.
- Implement feature to scale pods by a certain value when the add button is clicked.

kamarja/prescriptive-data-project1