docker, improvements, etc

Dockerfile

@@ -1,16 +1,5 @@
-FROM alpine:3.2
-
-ENV GOPATH=/gopath \
-  SRC=/gopath/src/github.com/caarlos0/cepinator
-
-WORKDIR $SRC
-ADD . $SRC
+FROM alpine
+RUN apk add --update ca-certificates && rm -rf /var/cache/apk/* /tmp/*
 EXPOSE 3000
-
-RUN apk add -U git go && \
-  go get -v -d ./... && \
-  go install -v ./... && \
-  apk del git go && \
-  rm -rf /gopath/src /gopath/pkg /var/cache/apk/*
-
-CMD /gopath/bin/cepinator
+COPY cepinator /
+ENTRYPOINT ./cepinator

LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2015 Carlos Alexandro Becker
+Copyright (c) 2015-2017 Carlos Alexandro Becker
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -2,4 +2,21 @@
 
 Brazilian zip codes (CEP) microservice.
 
-Simple microservice written in Go to manage brazilian zip code addresses.
+It gets CEP's from [viacep] and cache them in a redis store.
+It's simple and really fast.
+
+You can run it within Docker:
+
+```console
+docker -d run -p 3000:3000 caarlos0/cepinator
+```
+
+Or download a binary from [releases](https://github.com/caarlos0/cepinator/releases)
+and execute it.
+
+## Configuration
+
+Configuration is done via environment variables:
+
+- `PORT`: port to bind to, defaults to 3000;
+- `REDIS_URL`: redis URL to use, defaults to `:6379`.

cache/cache.go

@@ -1,13 +1,19 @@
 package cache
 
 import (
+	"io/ioutil"
+	"log"
 	"time"
 
 	rediscache "github.com/go-redis/cache"
 	"github.com/go-redis/redis"
 	msgpack "gopkg.in/vmihailenco/msgpack.v2"
 )
 
+func init() {
+	log.SetOutput(ioutil.Discard)
+}
+
 // Cache interface
 type Cache interface {
 	Close() error
@@ -37,7 +43,6 @@ func New(url string) Cache {
 			return msgpack.Unmarshal(b, v)
 		},
 	}
-
 	return &Redis{
 		ring:  ring,
 		codec: codec,

docker-build

@@ -0,0 +1,13 @@
+#!/bin/bash
+docker run \
+  -v "$PWD":/go/src/github.com/caarlos0/cepinator \
+  -w /go/src/github.com/caarlos0/cepinator \
+  -e GOOS=linux \
+  -e GOARCH=amd64 \
+  -e CGO_ENABLED=0 \
+  golang:1.8 \
+  bash -c 'go build -tags netgo --ldflags "-extldflags "-static"" -o cepinator .'
+
+docker build -t caarlos0/cepinator .
+docker push caarlos0/cepinator
+docker rmi caarlos0/cepinator

main.go

@@ -31,6 +31,7 @@ func main() {
 	if err := env.Parse(&config); err != nil {
 		log.WithError(err).Fatal("failed to load config")
 	}
+	var log = log.WithField("port", config.Port).WithField("redis", config.RedisURL)
 
 	var cache = cache.New(config.RedisURL)
 	defer cache.Close()
@@ -45,7 +46,7 @@ func main() {
 		WriteTimeout: 15 * time.Second,
 		ReadTimeout:  15 * time.Second,
 	}
-	log.WithField("port", config.Port).Info("starting up...")
+	log.Info("starting up...")
 	if err := srv.ListenAndServe(); err != nil {
 		log.WithError(err).Error("failed to start up server")
 	}