September 2019
Intermediate to advanced
668 pages
15h 59m
English
Content preview from Hands-On Microservices with Spring Boot and Spring Cloud
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The problem with DNS-based service discovery
So, what's the problem?
Why can't we simply start new instances of a microservice and rely on round-robin DNS? In essence, given that the microservice instances have the same DNS name, the DNS server will resolve it to a list of IP addresses for the available instances. Due to this, the client can call the service instances in a round-robin fashion.
Let's try it out and see what happens, shall we? Follow these steps:
- Assuming that you have followed the instructions from Chapter 7, Developing Reactive Microservices, start the system landscape and insert some test data with the following command:
cd $BOOK_HOME/chapter07./test-em-all.bash start
- Scale up the review microservice to two instances: ...