experiment with Docker

Author: dmke

.goreleaser.yml

@@ -8,6 +8,8 @@ before:
 builds:
 - goos:   [linux, freebsd, windows, darwin]
   goarch: [amd64, arm64]
+  env:
+  - CGO_ENABLED=0
   ignore:
   - goos:   freebsd
     goarch: arm64
@@ -22,6 +24,15 @@ archive:
     windows:  win
     amd64:    64-bit
 
+dockers:
+  - binary:   http-over-ssh
+    goos:     linux
+    goarch:   amd64
+    image_templates:
+    - "digineo/http-over-ssh:latest"
+    - "digineo/http-over-ssh:{{ .Version }}"
+    skip_push: true
+
 release:
   prerelease: auto
 

Dockerfile

@@ -0,0 +1,17 @@
+FROM alpine:latest
+
+RUN apk --no-cache add tzdata ca-certificates \
+ && mkdir /data
+
+COPY http-over-ssh /
+
+ENV ZONEINFO    /zoneinfo.zip
+ENV HOS_USER    root
+ENV HOS_TIMEOUT 10s
+ENV HOS_KEY_DIR /data
+ENV HOS_LISTEN  :8080
+EXPOSE 8080
+
+WORKDIR /data
+ENTRYPOINT ["/http-over-ssh"]
+

main.go

@@ -22,16 +22,26 @@ var home = func() string {
 	return os.Getenv("HOME")
 }()
 
+var sshKeyDir = or(os.Getenv("HOS_KEY_DIR"), filepath.Join(home, ".ssh"))
+
 var sshKeys = []string{
-	filepath.Join(home, ".ssh/id_rsa"),
-	filepath.Join(home, ".ssh/id_ed25519"),
+	filepath.Join(sshKeyDir, "id_rsa"),
+	filepath.Join(sshKeyDir, "id_ed25519"),
 }
 
 // command line flags
 var (
-	listen     = "[::1]:8080"
-	sshUser    = "root"
-	sshTimeout = 10 * time.Second
+	listen     = or(os.Getenv("HOS_LISTEN"), "[::1]:8080")
+	sshUser    = or(os.Getenv("HOS_USER"), "root")
+	sshTimeout = func() time.Duration {
+		dur := os.Getenv("HOS_TIMEOUT")
+		if dur != "" {
+			if d, err := time.ParseDuration(dur); err != nil {
+				return d
+			}
+		}
+		return 10 * time.Second
+	}()
 )
 
 // build flags
@@ -75,3 +85,10 @@ func main() {
 
 	log.Fatal(http.Serve(listener, proxy))
 }
+
+func or(s, alt string) string {
+	if s != "" {
+		return s
+	}
+	return alt
+}