Question 1

How do I install and set up Central Dogma from scratch?

Accepted Answer

Central Dogma is built with Gradle—run './gradlew build' to compile and generate JARs and tarballs, then deploy with ZooKeeper. Refer to the official site for detailed deployment guides, as the README focuses on building rather than installation steps.

Question 2

Central Dogma vs etcd: which is better for microservices configuration?

Accepted Answer

Central Dogma excels with Git-based versioning and high availability via ZooKeeper, ideal for auditing and rollbacks, while etcd is simpler for key-value storage with strong consistency. Choose Central Dogma if you need full version history, or etcd for lightweight, embeddable use cases.

Question 3

Does Central Dogma support real-time configuration updates without polling?

Accepted Answer

It uses HTTP/2 for efficient communication, which supports streaming, but the README doesn't specify watch mechanisms; you may need to implement polling or check the API for push-based updates, common in similar systems.

Question 4

What are the hardware requirements for running Central Dogma in production?

Accepted Answer

Requirements depend on load and ZooKeeper setup, but typically need multiple nodes for high availability, with sufficient RAM and CPU for Git operations and HTTP/2 traffic. LINE's production use suggests scalability, but plan for resource-intensive deployments.

Question 5

How to integrate Central Dogma with Kubernetes for configuration management?

Accepted Answer

You can deploy Central Dogma as a service within Kubernetes and use sidecar containers or init containers to fetch configurations via its HTTP/2 API. However, there's no built-in Kubernetes operator, so custom scripting or tools may be required.

Question 6

Can I use Central Dogma without ZooKeeper for simpler setups?

Accepted Answer

No, ZooKeeper is essential for high availability and coordination in Central Dogma; skipping it would compromise reliability. For lighter needs, consider alternatives like Git-based config files or etcd without such dependencies.

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