Add webserver dockerfile
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.gitignore
vendored
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1
.gitignore
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webserver/webserver
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@ -7,3 +7,8 @@ The containers are stored on my gitea instance, so you can pull them like this:
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```bash
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docker pull gitea.elara.ws/elara6331/golang:latest
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```
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### Images
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- `golang`: An alpine-based image with Go installed
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- `webserver`: A very simple webserver
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4
webserver/Dockerfile
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webserver/Dockerfile
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FROM busybox:latest
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COPY webserver /usr/bin/webserver
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RUN mkdir /html
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ENTRYPOINT webserver
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webserver/build.sh
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webserver/build.sh
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#!/bin/bash
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if [[ $# == 0 ]]; then
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echo "Usage: $0 <arch>"
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exit 1
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fi
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GOOS=linux GOARCH=$1 go build -o webserver ./cmd/main.go
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docker login gitea.elara.ws
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docker build . -t "gitea.elara.ws/elara6331/webserver:$1"
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docker push "gitea.elara.ws/elara6331/webserver:$1"
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webserver/cmd/main.go
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webserver/cmd/main.go
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package main
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import (
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"io"
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"log"
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"net/http"
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"os"
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"strings"
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"time"
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)
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func main() {
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addr := os.Getenv("WEBSERVER_ADDR")
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if addr == "" {
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addr = ":8000"
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}
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log.Println("Starting HTTP server at", addr)
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h := http.FileServer(http.Dir("/html"))
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h = methodMiddleware(h)
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h = logMiddleware(h)
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http.ListenAndServe(addr, h)
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}
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func methodMiddleware(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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if r.Method != http.MethodGet {
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w.WriteHeader(http.StatusMethodNotAllowed)
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io.WriteString(w, "Method not allowed: "+r.Method)
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} else {
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next.ServeHTTP(w, r)
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}
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})
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}
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func logMiddleware(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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start := time.Now()
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next.ServeHTTP(w, r)
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log.Printf("[http] Request from %s; latency=%s, method=%s, path=%q\n", getRealIP(r), time.Since(start), r.Method, r.URL.Path)
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})
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}
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func getRealIP(r *http.Request) string {
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xff := r.Header.Get("X-Forwarded-For")
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if xff != "" {
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before, _, ok := strings.Cut(xff, ", ")
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if ok {
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return before
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} else {
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return xff
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}
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}
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xrip := r.Header.Get("X-Real-IP")
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if xrip != "" {
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return xrip
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}
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return r.RemoteAddr
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}
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11
webserver/manifest.sh
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webserver/manifest.sh
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#!/bin/bash
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tag="$1"
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tag="${tag:=latest}"
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docker login gitea.elara.ws
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docker manifest create "gitea.elara.ws/elara6331/webserver:$tag" \
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--amend gitea.elara.ws/elara6331/webserver:amd64 \
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--amend gitea.elara.ws/elara6331/webserver:arm64 \
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--amend gitea.elara.ws/elara6331/webserver:riscv64
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docker manifest push "gitea.elara.ws/elara6331/webserver:$tag"
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