Dummy microservice

A tiny golang application simulating a microservice. It

• listens for HTTP POST inbound connections
• connects to other named microservices specified on the command line
• sends messages with size specified on the command line
• maintains a user defined CPU and memory load
• logs sent and received through Zipkin

Build

Using Go natively

go  get -u
make microservice

Usage

Usage of ./micro-sock:
  -name string
        service name
  -zipkin string
        zipkin address (addrs:port) -- default 0.0.0.0:9411
  -msg-size uint
        average size of all messages outgoing -- default:256
  -load float64
        average CPU load per request being processing -- default 10% of CPU
  -msg-time uint
        average time to process an incoming message -- default 10ms
  -mem uint
        minimum memory used by the microservice -- default 128MB

Example

The following example will start a microservice and attempt to connect to a different instance of micro-sock "test-host". In this case, zipkin is on host "zipkin"

./microservice -name=micro -zipkin=zipkin:9411 test-host

To test using docker-compose

docker-compose -f zipkin_docker-compose.yaml -f docker-compose.custom.yml

In another bash or on browser

To exercise all endpoints:

curl -I -XPOST localhost:8080/

or to exercise few endpoints at random

curl -I -XPOST localhost:8080/random