try new tagging. Add ip of host to image

.drone.yml

@@ -14,8 +14,7 @@ pipeline:
       - go build
   publish:
     image: plugins/docker
-    custom_dns: [ 8.8.8.8, 8.8.4.4 ]
     repo: deadbeef.codes:5000/mandelmap
     registry: deadbeef.codes:5000
-#    auto_tag: true
-#    auto_tag_suffix: linux-rpi3
+    auto_tag: true
+    auto_tag_suffix: ${DRONE_COMMIT}

render.go

@@ -8,6 +8,7 @@ import (
 	"log"
 	"math"
 	"math/cmplx"
+	"net"
 	"net/http"
 	"runtime"
 	"strconv"
@@ -15,6 +16,9 @@ import (
 	"sync"
 
 	"deadbeef.codes/steven/mandelmapper/palette"
+	"golang.org/x/image/font"
+	"golang.org/x/image/font/basicfont"
+	"golang.org/x/image/math/fixed"
 )
 
 const (
@@ -116,6 +120,9 @@ func renderTile(w http.ResponseWriter, r *http.Request) {
 
 	wg.Wait()
 
+	ip := GetOutboundIP()
+
+	addLabel(img, 20, 30, fmt.Sprintf("%s", string(ip)))
 	//addLabel(img, 20, 30, fmt.Sprintf("%s/%s/%s.png", components[1], components[2], components[3]))
 	w.Header().Set("Content-Type", "image/png")
 	png.Encode(w, img)
@@ -195,7 +202,7 @@ func linearInterpolation(c1, c2, mu uint32) uint32 {
 }
 
 //Adds a text label to an image
-/*
+
 func addLabel(img *image.RGBA, x, y int, label string) {
 	col := color.RGBA{255, 255, 255, 255}
 	point := fixed.Point26_6{fixed.Int26_6(x * 64), fixed.Int26_6(y * 64)}
@@ -208,4 +215,15 @@ func addLabel(img *image.RGBA, x, y int, label string) {
 	}
 	d.DrawString(label)
 }
-*/
+
+func GetOutboundIP() net.IP {
+	conn, err := net.Dial("udp", "8.8.8.8:80")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer conn.Close()
+
+	localAddr := conn.LocalAddr().(*net.UDPAddr)
+
+	return localAddr.IP
+}