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I was wondering how information on deployed applications are kept in real, production environments (yeah, I am a novice) . For example, in a microservices based set up, if 5 microservices-based applications were deployed in production environments. Let's say each of those had 4 - 6 instances each, are there special software for keeping record of these applications? I know the records can be easily written into a database but I can imagine some better solutions out there.

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According to the Cloud Native Landscape, you are looking for a Coordination & Service Discovery:

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https://etcd.io/

A distributed, reliable key-value store for the most critical data of a distributed system

https://github.com/Netflix/eureka

Eureka is a REST (Representational State Transfer) based service that is primarily used in the AWS cloud for locating services for the purpose of load balancing and failover of middle-tier servers.

https://github.com/alibaba/nacos

Nacos (official site: http://nacos.io) is an easy-to-use platform designed for dynamic service discovery and configuration and service management. It helps you to build cloud native applications and microservices platform easily.

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  • thank you very much for the answer. However, my experience with registry and service discovery e.g. Netflix Eureka, falls short of my requirements. There are two major reasons, first, the systems you listed retain information ephemerally i.e. all information is lost following a shutdown. Secondly, asides the application metadata e.g. endpoints, it is important to have knowledge about deployment dates, test dates i.e. the information about the application's lifecycle. Therefore, I was hoping for a solution that aggregates all these disjointed pieces of information.
    – SyCode
    Commented Aug 22, 2019 at 7:42
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    Maybe Helm could fill the role of providing the deployment dates and other lifecycle things?
    – Randy L
    Commented Aug 22, 2019 at 14:43
  • @theOther can you briefly explain? I am not conversant with helm, a quick look at the documentation (helm.sh/docs/using_helm/#quickstart) gives me no clues.
    – SyCode
    Commented Aug 22, 2019 at 16:55

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