t1

Using docker-compose

• Web: Nginx
• App: Flask
• DB: MySQL
• NOSQL: Datastax

Get Started

docker-compose up

• VSCode
• Remote Debugging: MS ptvsd

Based on best practices for Python projects with Docker Compose, presented at DockerCon-2020.

• video: Best Practices for Compose-managed Python Applications by Anca Lordache - Docker Enginner.
• repository: Demo resources for DockerCon

Graph Traversal

query

@server.route('/ver')
def gtest():

    graph_name = 'trees_prod'
    ep_graphson3 = GraphExecutionProfile(
        row_factory=graph_graphson3_row_factory,
        graph_options=GraphOptions(
            graph_protocol=GraphProtocol.GRAPHSON_3_0,
            graph_name=graph_name))

    cluster = Cluster(contact_points=['172.18.0.4'], execution_profiles={'core': ep_graphson3})

    session = cluster.connect()

    rec = session.execute_graph("g.V().has('Sensor', 'sensor_name', '104115939').
                project('name').
                by('sensor_name').fold()",
            execution_profile='core')

    result = []
    for c in rec:
        result.append(c)

    return flask.jsonify({"response": result})

response

GET /ver
Server response
{"response":[[{"name":"104115939"}]]}

Using Kind & Tilt

Prerequisites:

• Docker
• Kind
• Tilt

Cluster infrastructure with Cassandra

• Create local registry at localhost:5000
• Create Cassandra operator v1.3
• Launch Cassandra
• Create configMap with secret password
• Apps apply configMap before running
• Check Tiltfile

Get started

# cleaning
scripts/prune.sh

# start the fun
scripts/setup.sh
scripts/setup-configMap.sh
scripts/setup-dashBoard.sh

# develop apps
tilt up

Kubernetes Dashboard

Available at: http://localhost:8001/api/v1/namespaces/kubernetes-dashboard/services/https:kubernetes-dashboard:/proxy/

Authenticate with Token provided by following command:

kubectl -n kubernetes-dashboard describe secret admin-user-token | grep ^token