chore: clean the start of the server

k8s creates env var based on service name,
then WHOAMI_PORT exists and contains a URL instead of a number.

.github/workflows/go-cross.yml

@@ -0,0 +1,50 @@
+name: Go Matrix
+on: [push, pull_request]
+
+jobs:
+
+  cross:
+    name: Go
+    runs-on: ${{ matrix.os }}
+    env:
+      CGO_ENABLED: 0
+
+    strategy:
+      matrix:
+        go-version: [ 1.17, 1.x ]
+        os: [ubuntu-latest, macos-latest, windows-latest]
+
+    steps:
+      # https://github.com/marketplace/actions/setup-go-environment
+      - name: Set up Go ${{ matrix.go-version }}
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ matrix.go-version }}
+
+      # https://github.com/marketplace/actions/checkout
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      # https://github.com/marketplace/actions/cache
+      - name: Cache Go modules
+        uses: actions/cache@v2
+        with:
+          # In order:
+          # * Module download cache
+          # * Build cache (Linux)
+          # * Build cache (Mac)
+          # * Build cache (Windows)
+          path: |
+            ~/go/pkg/mod
+            ~/.cache/go-build
+            ~/Library/Caches/go-build
+            %LocalAppData%\go-build
+          key: ${{ runner.os }}-${{ matrix.go-version }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-${{ matrix.go-version }}-go-
+
+      - name: Test
+        run: go test -v -cover ./...
+
+      - name: Build
+        run: go build -v -ldflags "-s -w" -trimpath

.github/workflows/main.yml

@@ -0,0 +1,80 @@
+name: Main
+
+on:
+  push:
+    branches:
+      - master
+    tags:
+      - v*
+  pull_request:
+
+jobs:
+
+  main:
+    name: Main Process
+    runs-on: ubuntu-latest
+    env:
+      GO_VERSION: 1.17
+      GOLANGCI_LINT_VERSION: v1.43.0
+      SEIHON_VERSION: v0.8.5
+      CGO_ENABLED: 0
+
+    steps:
+
+      # https://github.com/marketplace/actions/setup-go-environment
+      - name: Set up Go ${{ env.GO_VERSION }}
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ env.GO_VERSION }}
+
+      # https://github.com/marketplace/actions/checkout
+      - name: Check out code
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      # https://github.com/marketplace/actions/cache
+      - name: Cache Go modules
+        uses: actions/cache@v2
+        with:
+          path: ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+
+      - name: Check and get dependencies
+        run: |
+          go mod tidy
+          git diff --exit-code go.mod
+          git diff --exit-code go.sum
+
+      # https://golangci-lint.run/usage/install#other-ci
+      - name: Install golangci-lint ${{ env.GOLANGCI_LINT_VERSION }}
+        run: |
+          curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin ${GOLANGCI_LINT_VERSION}
+          golangci-lint --version
+
+      - name: Make
+        run: make
+
+      - name: Make Image
+        run: make image
+
+      # Install Docker image multi-arch builder
+      - name: Install seihon ${{ env.SEIHON_VERSION }}
+        if: startsWith(github.ref, 'refs/tags/v')
+        run: |
+          curl -sSfL https://raw.githubusercontent.com/ldez/seihon/master/godownloader.sh | sh -s -- -b $(go env GOPATH)/bin ${SEIHON_VERSION}
+          seihon --version
+
+      - name: Docker Login
+        if: startsWith(github.ref, 'refs/tags/v')
+        env:
+          DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
+          DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}
+        run: |
+          echo "${DOCKER_PASSWORD}" | docker login --username "${DOCKER_USERNAME}" --password-stdin
+
+      - name: Deploy Docker Images (seihon)
+        if: startsWith(github.ref, 'refs/tags/v')
+        run: make publish-images

.golangci.toml

@@ -1,41 +0,0 @@
-[run]
-  deadline = "2m"
-  skip-files = []
-
-[linters-settings]
-
-  [linters-settings.govet]
-    check-shadowing = true
-
-  [linters-settings.gocyclo]
-    min-complexity = 12.0
-
-  [linters-settings.maligned]
-    suggest-new = true
-
-  [linters-settings.goconst]
-    min-len = 3.0
-    min-occurrences = 3.0
-
-  [linters-settings.misspell]
-    locale = "US"
-
-[linters]
-  enable-all = true
-  disable = [
-    "maligned",
-    "lll",
-    "gosec",
-    "dupl",
-    "prealloc",
-    "gochecknoglobals",
-    "gochecknoinits",
-    "gomnd",
-    "wsl",
-  ]
-
-[issues]
-  exclude-use-default = false
-  max-per-linter = 0
-  max-same-issues = 0
-  exclude = []

.golangci.yml

@@ -0,0 +1,46 @@
+run:
+  deadline: 2m
+  skip-files: []
+linters-settings:
+  govet:
+    check-shadowing: true
+  gocyclo:
+    min-complexity: 12
+  goconst:
+    min-len: 3
+    min-occurrences: 3
+  misspell:
+    locale: US
+
+linters:
+  enable-all: true
+  disable:
+    - golint # deprecated
+    - scopelint # deprecated
+    - interfacer # deprecated
+    - maligned # deprecated
+    - lll
+    - gosec
+    - dupl
+    - prealloc
+    - gochecknoglobals
+    - gochecknoinits
+    - gomnd
+    - wsl
+    - nlreturn
+    - testpackage
+    - paralleltest
+    - tparallel
+    - goerr113
+    - wrapcheck
+    - exhaustive
+    - exhaustivestruct
+    - forbidigo
+    - varnamelen
+    - nilnil
+
+issues:
+  exclude-use-default: false
+  max-per-linter: 0
+  max-same-issues: 0
+  exclude: []

.travis.yml

@@ -1,53 +0,0 @@
-language: go
-
-go:
-  - "1.x"
-
-cache:
-  directories:
-    - $GOPATH/pkg/mod
-
-branches:
-  only:
-    - master
-    - /^v\d+\.\d+(\.\d+)?(-\S*)?$/
-
-notifications:
-  email:
-    on_success: never
-    on_failure: change
-
-env:
-  - GO111MODULE=on
-
-before_install:
-  # Install linters and misspell
-  - curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | bash -s -- -b $GOPATH/bin ${GOLANGCI_LINT_VERSION}
-  - golangci-lint --version
-  # Install Docker image multi-arch builder
-  - curl -sfL https://raw.githubusercontent.com/ldez/seihon/master/godownloader.sh | bash -s -- -b "${GOPATH}/bin" ${SEIHON_VERSION}
-  - seihon --version
-
-install:
-  - go mod tidy
-  - git diff --exit-code go.mod
-  - git diff --exit-code go.sum
-  - go mod download
-
-script:
-  - make
-  - make image
-
-before_deploy:
-  - >
-    if ! [ "$BEFORE_DEPLOY_RUN" ]; then
-      export BEFORE_DEPLOY_RUN=1;
-      echo "${DOCKER_PASSWORD}" | docker login -u "${DOCKER_USERNAME}" --password-stdin
-    fi
-
-deploy:
-  - provider: script
-    skip_cleanup: true
-    script: make publish-images
-    on:
-      tags: true

LICENSE

@@ -187,6 +187,7 @@
       identification within third-party archives.
 
    Copyright [2015-2018] [Containous]
+   Copyright [2020] [Traefik Labs]
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.

Makefile

@@ -2,19 +2,21 @@
 
 TAG_NAME := $(shell git tag -l --contains HEAD)
 
+IMAGE_NAME := traefik/whoami
+
 default: check test build
 
+build:
+	CGO_ENABLED=0 go build -a --trimpath --installsuffix cgo --ldflags="-s" -o whoami
+
 test:
 	go test -v -cover ./...
 
-build:
-	CGO_ENABLED=0 go build -a --installsuffix cgo --ldflags="-s" -o whoami
-
-image:
-	docker build -t containous/whoami .
-
 check:
 	golangci-lint run
 
+image:
+	docker build -t $(IMAGE_NAME) .
+
 publish-images:
-	seihon publish -v "$(TAG_NAME)" -v "latest" --image-name containous/whoami --dry-run=false
+	seihon publish -v "$(TAG_NAME)" -v "latest" --image-name $(IMAGE_NAME) --dry-run=false

README.md

@@ -1,7 +1,7 @@
 # whoami
 
-[![Docker Pulls](https://img.shields.io/docker/pulls/containous/whoami.svg)](https://hub.docker.com/r/containous/whoami/)
-[![Build Status](https://travis-ci.com/containous/whoami.svg?branch=master)](https://travis-ci.com/containous/whoami)
+[![Docker Pulls](https://img.shields.io/docker/pulls/traefik/whoami.svg)](https://hub.docker.com/r/traefik/whoami/)
+[![Build Status](https://github.com/traefik/whoami/workflows/Main/badge.svg?branch=master)](https://github.com/traefik/whoami/actions)
 
 Tiny Go webserver that prints os information and HTTP request to output
 
@@ -22,13 +22,13 @@ Tiny Go webserver that prints os information and HTTP request to output
 
 - `cert`: give me a certificate.
 - `key`: give me a key.
-- `port`: give me a port number. (default: 80)
+- `port`: give me a port number. (it can be also defined with `WHOAMI_PORT_NUMBER` environment variable) (default: 80)
 - `name`: give me a name. (it can be also defined with `WHOAMI_NAME` environment variable)
 
 ## Examples
 
 ```console
-$ docker run -d -P --name iamfoo containous/whoami
+$ docker run -d -P --name iamfoo traefik/whoami
 
 $ docker inspect --format '{{ .NetworkSettings.Ports }}'  iamfoo
 map[80/tcp:[{0.0.0.0 32769}]]
@@ -66,5 +66,5 @@ $ curl -v http://localhost:80/health
 ```
 
 ```console
-docker run -d -P -v ./certs:/certs --name iamfoo containous/whoami --cert /certs/cert.cer --key /certs/key.key
+docker run -d -P -v ./certs:/certs --name iamfoo traefik/whoami --cert /certs/cert.cer --key /certs/key.key
 ```

app.go

@@ -2,10 +2,13 @@ package main
 
 import (
 	"bytes"
+	"crypto/tls"
+	"crypto/x509"
 	"encoding/json"
 	"flag"
 	"fmt"
 	"io"
+	"io/ioutil"
 	"log"
 	"net"
 	"net/http"
@@ -19,7 +22,7 @@ import (
 	"github.com/gorilla/websocket"
 )
 
-// Units
+// Units.
 const (
 	_        = iota
 	KB int64 = 1 << (10 * iota)
@@ -28,15 +31,19 @@ const (
 	TB
 )
 
-var cert string
-var key string
-var port string
-var name string
+var (
+	cert string
+	key  string
+	ca   string
+	port string
+	name string
+)
 
 func init() {
 	flag.StringVar(&cert, "cert", "", "give me a certificate")
 	flag.StringVar(&key, "key", "", "give me a key")
-	flag.StringVar(&port, "port", "80", "give me a port number")
+	flag.StringVar(&ca, "cacert", "", "give me a CA chain, enforces mutual TLS")
+	flag.StringVar(&port, "port", getEnv("WHOAMI_PORT_NUMBER", "80"), "give me a port number")
 	flag.StringVar(&name, "name", os.Getenv("WHOAMI_NAME"), "give me a name")
 }
 
@@ -48,19 +55,51 @@ var upgrader = websocket.Upgrader{
 func main() {
 	flag.Parse()
 
-	http.HandleFunc("/data", dataHandler)
-	http.HandleFunc("/echo", echoHandler)
-	http.HandleFunc("/bench", benchHandler)
-	http.HandleFunc("/", whoamiHandler)
-	http.HandleFunc("/api", apiHandler)
-	http.HandleFunc("/health", healthHandler)
+	mux := http.NewServeMux()
+	mux.HandleFunc("/data", dataHandler)
+	mux.HandleFunc("/echo", echoHandler)
+	mux.HandleFunc("/bench", benchHandler)
+	mux.HandleFunc("/", whoamiHandler)
+	mux.HandleFunc("/api", apiHandler)
+	mux.HandleFunc("/health", healthHandler)
 
-	fmt.Println("Starting up on port " + port)
+	if cert == "" || key == "" {
+		log.Printf("Starting up on port %s", port)
 
-	if len(cert) > 0 && len(key) > 0 {
-		log.Fatal(http.ListenAndServeTLS(":"+port, cert, key, nil))
+		log.Fatal(http.ListenAndServe(":"+port, mux))
 	}
-	log.Fatal(http.ListenAndServe(":"+port, nil))
+
+	server := &http.Server{
+		Addr:    ":" + port,
+		Handler: mux,
+	}
+
+	if len(ca) > 0 {
+		server.TLSConfig = setupMutualTLS(ca)
+	}
+
+	log.Printf("Starting up with TLS on port %s", port)
+
+	log.Fatal(server.ListenAndServeTLS(cert, key))
+}
+
+func setupMutualTLS(ca string) *tls.Config {
+	clientCACert, err := ioutil.ReadFile(ca)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	clientCertPool := x509.NewCertPool()
+	clientCertPool.AppendCertsFromPEM(clientCACert)
+
+	tlsConfig := &tls.Config{
+		ClientAuth:               tls.RequireAndVerifyClientCert,
+		ClientCAs:                clientCertPool,
+		PreferServerCipherSuites: true,
+		MinVersion:               tls.VersionTLS12,
+	}
+
+	return tlsConfig
 }
 
 func benchHandler(w http.ResponseWriter, _ *http.Request) {
@@ -130,7 +169,7 @@ func dataHandler(w http.ResponseWriter, r *http.Request) {
 	content := fillContent(size)
 
 	if attachment {
-		w.Header().Add("Content-Disposition", "Attachment")
+		w.Header().Set("Content-Disposition", "Attachment")
 		http.ServeContent(w, r, "data.txt", time.Now(), content)
 		return
 	}
@@ -191,6 +230,7 @@ func apiHandler(w http.ResponseWriter, req *http.Request) {
 		URL      string      `json:"url,omitempty"`
 		Host     string      `json:"host,omitempty"`
 		Method   string      `json:"method,omitempty"`
+		Name     string      `json:"name,omitempty"`
 	}{
 		Hostname: hostname,
 		IP:       []string{},
@@ -198,6 +238,7 @@ func apiHandler(w http.ResponseWriter, req *http.Request) {
 		URL:      req.URL.RequestURI(),
 		Host:     req.Host,
 		Method:   req.Method,
+		Name:     name,
 	}
 
 	ifaces, _ := net.Interfaces()
@@ -229,8 +270,10 @@ type healthState struct {
 	StatusCode int
 }
 
-var currentHealthState = healthState{http.StatusOK}
-var mutexHealthState = &sync.RWMutex{}
+var (
+	currentHealthState = healthState{http.StatusOK}
+	mutexHealthState   = &sync.RWMutex{}
+)
 
 func healthHandler(w http.ResponseWriter, req *http.Request) {
 	if req.Method == http.MethodPost {
@@ -268,3 +311,11 @@ func fillContent(length int64) io.ReadSeeker {
 
 	return bytes.NewReader(b)
 }
+
+func getEnv(key, fallback string) string {
+	value := os.Getenv(key)
+	if len(value) == 0 {
+		return fallback
+	}
+	return value
+}

go.mod

@@ -1,5 +1,5 @@
-module github.com/containous/whoami
+module github.com/traefik/whoami
 
-go 1.13
+go 1.17
 
-require github.com/gorilla/websocket v1.4.1
+require github.com/gorilla/websocket v1.4.2

go.sum

@@ -1,2 +1,2 @@
-github.com/gorilla/websocket v1.4.1 h1:q7AeDBpnBk8AogcD4DSag/Ukw/KV+YhzLj2bP5HvKCM=
-github.com/gorilla/websocket v1.4.1/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
+github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0Ufc=
+github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=

tmpl.Dockerfile

@@ -12,6 +12,7 @@ COPY go.sum .
 RUN GO111MODULE=on GOPROXY=https://proxy.golang.org go mod download
 
 COPY . .
+
 RUN GOARCH={{ .GoARCH }} GOARM={{ .GoARM }} make build
 
 FROM scratch