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Change Data Capture (CDC) is a design pattern that captures changes made at a source and replicates them to a destination.

In this example, we'll move data from some databases to a Kafka topic, the data will be transformed and saved into another destination database.

Architecture

Components

We will use a lot of components and tools to conduct this workshop. The main components are:

  • Kafka: A distributed streaming platform used to build real-time data pipelines and streaming apps.
  • Kafka Connect: An integration framework for connecting Kafka with external systems such as databases, key-value stores, and search indexes.
  • Camel: An open-source integration framework that provides a standardized way to connect to different protocols and technologies.
  • Quarkus: A Kubernetes-native Java framework tailored for GraalVM and HotSpot, offering fast boot times and low memory usage.
  • ReactJS: A JavaScript library for building user interfaces, particularly known for its efficient rendering and the concept of component-based architecture."

Start up

Operator installation:

oc apply -f gitops/bootstrap/openshift-gitops.yaml

Retrieve ArgoCD route:

oc get route -A | grep openshift-gitops-server | awk '{print $3}'

Get the ArgoCD admin password:

oc -n openshift-gitops get secret openshift-gitops-cluster -o json | jq -r '.data["admin.password"]' | base64 -d

ArgoCD needs some privileges to create specific resources. In this demo, we'll apply cluster-role to ArgoCD to avoid the fine-grain RBAC.

oc apply -f gitops/bootstrap/cluster-role.yaml

Now, we apply the bootstrap application:

oc apply -f gitops/bootstrap/bootstrap.yaml