Micro is a platform for cloud native application development.
Micro addresses the key requirements for building services in the cloud. It leverages the microservices architecture pattern and provides a set of services which act as the building blocks of a platform. Micro deals with the complexity of distributed systems and provides simpler programmable abstractions to build on.
Micro provides a logical server composed of building block services, a Go framework for development, command line interface, API gateway and gRPC Proxy for external and remote access. Each service provides access to underlying infrastructure primitives through a standard interface with a development model tying everything together.
Micro is the all encompassing end to end platform experience from source to running and beyond built with a developer first focus.
From Source
go get github.com/micro/micro/v3
Using Docker
# install
docker pull micro/micro
# run it
docker run -p 8080-8081:8080-8081/tcp micro/micro server
Helm Chart
helm repo add micro https://micro.github.io/helm
helm install micro micro/micro
Release binaries
# MacOS
curl -fsSL https://raw.githubusercontent.com/micro/micro/master/scripts/install.sh | /bin/bash
# Linux
wget -q https://raw.githubusercontent.com/micro/micro/master/scripts/install.sh -O - | /bin/bash
# Windows
powershell -Command "iwr -useb https://raw.githubusercontent.com/micro/micro/master/scripts/install.ps1 | iex"
Run the server locally
micro server
Login to the server
# user: admin pass: micro
micro login
Create a service
# generate a service (follow instructions in output)
micro new helloworld
# run the service
micro run helloworld
# list services
micro services
# call a service
micro helloworld --name=Alice
# curl via the api
curl -d '{"name": "Alice"}' http://localhost:8080/helloworld
Micro includes a Go framework for writing services wrapping gRPC for the core IDL and transport.
Define services in proto:
syntax = "proto3";
package helloworld;
service Helloworld {
rpc Call(Request) returns (Response) {}
}
message Request {
string name = 1;
}
message Response {
string msg = 1;
}
Write them using Go:
package main
import (
"context"
"github.com/micro/micro/v3/service"
"github.com/micro/micro/v3/service/logger"
pb "github.com/micro/services/helloworld/proto"
)
type Helloworld struct{}
// Call is a single request handler called via client.Call or the generated client code
func (h *Helloworld) Call(ctx context.Context, req *pb.Request, rsp *pb.Response) error {
logger.Info("Received Helloworld.Call request")
rsp.Msg = "Hello " + req.Name
return nil
}
func main() {
// Create service
srv := service.New(
service.Name("helloworld"),
)
// Register Handler
srv.Handle(new(Helloworld))
// Run the service
if err := srv.Run(); err != nil {
logger.Fatal(err)
}
}
Call with the client:
import (
"context"
"github.com/micro/micro/v3/service/client"
pb "github.com/micro/services/helloworld/proto"
)
// create a new helloworld service client
helloworld := pb.NewHelloworldService("helloworld", client.DefaultClient)
// call the endpoint Helloworld.Call
rsp, err := helloworld.Call(context.Background(), &pb.Request{Name: "Alice"})
Micro is built as a microservices architecture and abstracts away the complexity of the underlying infrastructure. We compose this as a single logical server to the user but decompose that into the various building block primitives that can be plugged into any underlying system.
Server
The server is composed of the following services.
- API - HTTP Gateway which dynamically maps http/json requests to RPC using path based resolution
- Auth - Authentication and authorization out of the box using jwt tokens and rule based access control.
- Broker - Ephemeral pubsub messaging for asynchronous communication and distributing notifications
- Config - Dynamic configuration and secrets management for service level config without the need to restart
- Events - Event streaming with ordered messaging, replay from offsets and persistent storage
- Network - Inter-service networking, isolation and routing plane for all internal request traffic
- Proxy - gRPC identity aware proxy used for remote access and any external grpc request traffic
- Runtime - Service lifecyle and process management with support for source to running auto build
- Registry - Centralised service discovery and API endpoint explorer with feature rich metadata
- Store - Key-Value storage with TTL expiry and persistent crud to keep microservices stateless
Framework
Micro additionaly now contains the incredibly popular Go Micro framework built in for service development. The Go framework makes it drop dead simple to write your services without having to piece together lines and lines of boilerplate. Auto configured and initialised by default, just import and get started quickly.
Command Line
Micro brings not only a rich architectural model but a command line experience tailored for that need. The command line interface includes dynamic command mapping for all services running on the platform. Turns any service instantly into a CLI command along with flag parsing for inputs. Includes support for multiple environments and namespaces, automatic refreshing of auth credentials, creating and running services, status info and log streaming, plus much, much more.
Environments
Finally Micro bakes in the concept of Environments
and multi-tenancy through Namespaces
. Run your server locally for
development and in the cloud for staging and production, seamlessly switch between them using the CLI commands micro env set [environment]
and micro user set [namespace]
.
See the docs for detailed information on the architecture, installation and use of the platform.
See LICENSE which makes use of Polyform Shield.
If you're interested in a hosted version of Micro see m3o.com.