micro--go-micro/internal/website/docs/plugins.md

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Plugins

Plugins are scoped under each interface directory within this repository. To use a plugin, import it directly from the corresponding interface subpackage and pass it to your service via options.

Common interfaces and locations:

• Registry: go-micro.dev/v6/registry/* (e.g. consul, etcd, nats, mdns)
• Broker: go-micro.dev/v6/broker/* (e.g. nats, rabbitmq, http, memory)
• Transport: go-micro.dev/v6/transport/* (e.g. nats, default http)
• Server: go-micro.dev/v6/server/* (e.g. grpc for native gRPC compatibility)
• Client: go-micro.dev/v6/client/* (e.g. grpc for native gRPC compatibility)
• Store: go-micro.dev/v6/store/* (e.g. postgres, mysql, nats-js-kv, memory)
• Auth, Cache, etc. follow the same pattern under their respective directories.

Registry Examples

Consul:

import (
    "go-micro.dev/v6"
    "go-micro.dev/v6/registry/consul"
)

func main() {
    reg := consul.NewConsulRegistry()
    svc := micro.NewService("plugin-example",
        micro.Registry(reg),
    )
    svc.Init()
    svc.Run()
}

Etcd:

import (
    "go-micro.dev/v6"
    "go-micro.dev/v6/registry/etcd"
)

func main() {
    reg := etcd.NewRegistry()
    svc := micro.NewService("plugin-example", micro.Registry(reg))
    svc.Init()
    svc.Run()
}

Broker Examples

NATS:

import (
    "go-micro.dev/v6"
    bnats "go-micro.dev/v6/broker/nats"
)

func main() {
    b := bnats.NewNatsBroker()
    svc := micro.NewService("plugin-example", micro.Broker(b))
    svc.Init()
    svc.Run()
}

RabbitMQ:

import (
    "go-micro.dev/v6"
    "go-micro.dev/v6/broker/rabbitmq"
)

func main() {
    b := rabbitmq.NewBroker()
    svc := micro.NewService("plugin-example", micro.Broker(b))
    svc.Init()
    svc.Run()
}

Transport Example (NATS)

import (
    "go-micro.dev/v6"
    tnats "go-micro.dev/v6/transport/nats"
)

func main() {
    t := tnats.NewTransport()
    svc := micro.NewService("plugin-example", micro.Transport(t))
    svc.Init()
    svc.Run()
}

gRPC Server/Client (Native gRPC Compatibility)

For native gRPC compatibility (required for grpcurl, polyglot gRPC clients, etc.), use the gRPC server and client plugins. Note: This is different from the gRPC transport.

import (
    "go-micro.dev/v6"
    grpcServer "go-micro.dev/v6/server/grpc"
    grpcClient "go-micro.dev/v6/client/grpc"
)

func main() {
    svc := micro.NewService("plugin-example",
        micro.Server(grpcServer.NewServer()),
        micro.Client(grpcClient.NewClient()),
    )
    svc.Init()
    svc.Run()
}

See Native gRPC Compatibility for a complete guide.

Store Examples

Postgres:

import (
    "go-micro.dev/v6"
    postgres "go-micro.dev/v6/store/postgres"
)

func main() {
    st := postgres.NewStore()
    svc := micro.NewService("plugin-example", micro.Store(st))
    svc.Init()
    svc.Run()
}

NATS JetStream KV:

import (
    "go-micro.dev/v6"
    natsjskv "go-micro.dev/v6/store/nats-js-kv"
)

func main() {
    st := natsjskv.NewStore()
    svc := micro.NewService("plugin-example", micro.Store(st))
    svc.Init()
    svc.Run()
}

Notes

• Defaults: If you don’t set an implementation, Go Micro uses sensible in-memory or local defaults (e.g., mDNS for registry, HTTP transport, memory broker/store).
• Options: Each plugin exposes constructor options to configure addresses, credentials, TLS, etc.
• Imports: Only import the plugin you need; this keeps binaries small and dependencies explicit.