如果有多个微服务，我应该如何集成测试它们？

Question

I am learning microservice architecture, but now there is some confusion.

situation

• there are 4 projects written in golang
  1. orderService
  2. userService
  3. tools
  4. web ( forward HTTP request )
• orderService , userService, web communicate via grpc
• all api requests through web forwarding to orderService or userService
• orderService and userService have their own independent database
• they are all in docker containers

confusion

when I want to test a request, I have to do the following steps:

cd orderService
govender update +vendor
go build

cd userService
govender update +vendor
go build

cd web
govender update +vendor
go build

docker-compose build
docker-compose up

when I changed some code, I have to do this steps again.
I think this is unscientific and abnormal. I want to know whether all of these steps are necessary to integration test four microservices in docker.

Answer 1

If you change Go code you have to recompile; that's not abnormal. Go code compiles quickly so that's usually not a big deal.

I'm not sure why you are running govendor repeatedly. If you are working on a dependency it is often easier to unvendor it temporarily.

To speed things up, don't use Docker during development; at least not for the Go code. Since Go doesn't have any dependencies beside itself there's no advantage to doing this. You can still run backing services (e.g. a database) in Docker, but you don't have to rebuild and restart that all the time.