API Gateway use-case

[FroMage]

Figure out if we can support that use-case.

Check:

• http://www.sczyh30.com/vertx-blueprint-microservice/api-gateway.html
• http://vertx.io/docs/vertx-circuit-breaker/java/
• https://github.com/vietj/vertx-http-proxy
• https://docs.traefik.io/

[fiorenzino]

Starting from the api gateway use-case, i created a big application with microservices with a custom api-gateway+serviceDiscovery in vertx and docker.
I changed something for file upload and for naming conventions for microservices.

If you want, with your help, i can create a little prototype.

[FroMage]

What ideas do you have? ATM I'm working on getting async injection working so I can get service registry URLs injected from the vertx-service-discovery module.

[fiorenzino]

My idea is simple:

• docker-compose with api-gateway, 2 services and mysql. The 2 services use the service discovery to comunicate via rest or via event bus.

docker-compose.yaml

version: "2"
services:
mysql:
image: mysql:5.7
volumes:
- ./mysql/data:/var/lib/mysql
- ./mysql/cnf:/etc/mysql/conf.d
restart: always
expose:
- "3306"
ports:
- "3307:3306"
environment:
MYSQL_ROOT_PASSWORD: xxxx
MYSQL_DATABASE: xxxx
MYSQL_USER: xxxx
MYSQL_PASSWORD: xxxx
command: [mysqld, --character-set-server=utf8mb4, --collation-server=utf8mb4_unicode_ci, --max-connections=1000, --wait-timeout=300, --interactive-timeout=300]
api-gateway:
image: redpipe/api-gateway
restart: always
mem_limit: 512m
expose:
- "8080"
ports:
- "8080:8080"
environment:
JAVA_OPS: "-Xmx256m"
depends_on:
- mysql
links:
- a-service
- b-service
a-service:
image: redpipe/a-service
restart: always
mem_limit: 512m
environment:
JAVA_OPS: "-Xmx256m"
depends_on:
- mysql
links:
- mysql
expose:
- "8000"
ports:
- "9002:8000"
b-service:
image: redpipe/b-service
restart: always
mem_limit: 512m
environment:
JAVA_OPS: "-Xmx256m"
depends_on:
- mysql
links:
- mysql
expose:
- "8000"
ports:
- "9001:8000"

My redpipe services docker images should have the same java libraries inside, and a single jar with classes of specific service (to slim the docker image creation - no fat jar).
redpipe images should start vertx in cluster mode.
they should share the eventbus and the service discovery.
This night i will try to code a little my idea: i must read more of the Redpipe engine code.
I have questions like: does Redpipe start the vertx verticles in cluster mode? etc etc

my experience with vertx microservices: i used the service discovery between docker machine in cluster (using docker-compose) without kubernetes. for me, it was really simple to deploy without infrastructure like openshift.

[FroMage]

We don't start Vert.x in cluster mode, but that should be enabled by config file. Sounds like a good experiment.

[fiorenzino]

this night..i will try!

[fiorenzino]

the use case complete is here:
[email protected]:fiorenzino/redpipe-clustered.git

why don't create a repository for all examples (and to remove from the source of project)?

[rdruss]

+1 ... seems reasonable to have examples in a separate repo