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415716 (2) [Avatar] Offline
Hi john,
I started reading your book, it is very good. I have a generic question, it is very good to design a system based on MicroServices architectural style (if it appropriate for the use case). But, When I deploy these containers in to an orchestrator(Docker swarm , Kubernetes), some of services(spring cloud) I am getting from an orchestrator by default, e.g service discovery, config etc. what are guidelines to build MicroServices application using Spring boot and Cloud, and want to deploy into a orchestrator?
John C Carnell (44) [Avatar] Offline
Actually thats really great question and I think one that more and more people encounter as they use tools like Kubernetes.

Spring Cloud is a really great solution if you are already heavily invested in the Spring ecosystem. However, orchestrators (like Kubernetes) already offer many of these services. I think the question you have to ask is:

1. Whats the learning curve for the orchestrator? If you are already a Spring shop the learning curve for learning another tool has to be taken into account. I love Kubernetes but it did come with a learning curve.

2. How homogenous is your service environment? Are you running all your services in your orchestrator? If so , it might make sense to use the orchestrator's capabilities. However, if you run a heterogenous environment you might want to run your service-discovery, config service, etc... as separate from the orchestrator because you can end up duplicating capabilities because you are running services inside and out the container.

3. How committed are you to the orchestrator platform? I think this is something you have to look at from an organizational perspective. Do you see the orchestration platform as a long-term commitment? Are you going to have the right level of expertise to manage the platform.

I personally think that tools like Docker Swarm and Kubernetes are great tools, but every organization is going to have different needs.

Hope that answered your question.

415716 (2) [Avatar] Offline
thanks John. Great.