Rather than mandating specific tools or programming languages, teams are now empowered to build and maintain their services, with the company encouraging experimentation and advocating for effective tools and practices. In the past, Cloudflare operated as a monolithic PHP application, but as the company grew and diversified, this approach proved to be limiting and risky. The services that send messages to Kafka are called producers, while those that read messages are called consumers. To ensure resilience, partitions are replicated according to a predetermined replication factor, with three being the usual minimum. In the diagram, there are partitions for topic A on both brokers, with each partition having a designated leader to determine its "source of truth". Topics are then divided into partitions, an approach that allows Kafka to scale horizontally.
Messages are categorized into topics, such as user events, for example, user creation, or user information updates. In the diagram below, broker 2 serves as the leader.
KafkaĪpache Kafka is built around the concept of clusters, which consist of multiple brokers, with each cluster having a designated leader broker responsible for coordination. In this article, we will focus on the Cloudflare control plane and explore how inter-service communication and enablement tools are scaled to support operations.
All Kafka producers and consumers are usually deployed into Kubernetes, but the specific deployment location depends on the workload and desired outcomes. The control plane, on the other hand, is a collection of data centers where the company runs Kubernetes, Kafka, and databases on bare metal. Looking at the Cloudflare network from an engineering perspective, there are two primary components: the Global Edge network and the Cloudflare control plane.Ī significant portion of the network is built using Cloudflare's products, with Workers deployed and used on the edge network. Cloudflare offers a range of products, including CDN, Zero Trust, and Cloudflare Workers, to achieve these goals, identifying and blocking malicious activity and allowing customers to focus on their work.
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