Source codde 請參考 https://github.com/chio-nzgft/Docker-golang-web
先寫個 Dockerfile ....上網找個 OS 比較完整也比較小的 ...找到 opensuse ....
FROM opensuse:latest
COPY web /web
ENTRYPOINT /web
EXPOSE 9090
再寫個 web.go ...例如 9090 port
[root@test web]# more web.go
package main
import (
"fmt"
"net/http"
"github.com/ajstarks/svgo"
"math/rand"
"time"
"log"
)
const arcfmt = "stroke:%s;stroke-opacity:%.2f;stroke-width:%dpx;fill:none"
var colors = []string{"red", "green", "blue", "white", "gray"}
func randarc(canvas *svg.SVG, aw, ah, sw int, f1, f2 bool) {
begin := rand.Intn(aw)
arclength := rand.Intn(aw)
end := begin + arclength
baseline := ah / 2
al := arclength / 2
cl := len(colors)
canvas.Arc(begin, baseline, al, al, 0, f1, f2, end, baseline,
fmt.Sprintf(arcfmt, colors[rand.Intn(cl)], rand.Float64(), rand.Intn(sw)))
}
func main() {
http.Handle("/", http.HandlerFunc(circle))
err := http.ListenAndServe(":9090", nil)
if err != nil {
log.Fatal("ListenAndServe:", err)
}
}
func circle(w http.ResponseWriter, req *http.Request) {
w.Header().Set("Content-Type", "image/svg+xml")
rand.Seed(time.Now().UnixNano())
width := 800
height := 800
aw := width / 2
maxstroke := height / 10
literactions := 50
canvas := svg.New(w)
canvas.Start(width, height)
canvas.Rect(0, 0, width, height)
for i := 0; i < literactions; i++ {
randarc(canvas, aw, height, maxstroke, false, true)
randarc(canvas, aw, height, maxstroke, false, false)
}
canvas.End()
}
建立 web 執行檔
[root@test web]# go get github.com/ajstarks/svgo
[root@test web]# go build web.go
建立 docker image web
[root@test web]# docker build -t web .
Sending build context to Docker daemon 33.03 MB
Step 1 : FROM opensuse:latest
Trying to pull repository docker.io/library/opensuse ...
latest: Pulling from docker.io/library/opensuse
09c979f45514: Pull complete
Digest: sha256:894a8214e62bfd0d0eacda1734180add36c521d352d7e60a91d5ae07cbb15c09
Status: Downloaded newer image for docker.io/opensuse:latest
---> 09b54e62aa03
Step 2 : COPY web /web
---> 3df4f2604b12
Removing intermediate container 57be8986c291
Step 3 : ENTRYPOINT /web
---> Running in 9c826beac1d0
---> 362d33afc382
Removing intermediate container 9c826beac1d0
Step 4 : EXPOSE 9090
---> Running in 992e64ef5e90
---> 23accfd5cd07
Removing intermediate container 992e64ef5e90
Successfully built 23accfd5cd07
執行 docker image 到 container
[root@test web]# docker run -d -p 192.168.0.70:9093:9090 web
fa80bc1326fc48643dfcea13200acc27631b39444354f605f0cd17b8d0784f51
[root@test web]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
fa80bc1326fc web "/bin/sh -c /web" 7 seconds ago Up 4 seconds 192.168.0.70:9093->9090/tcp hungry_mestorf
查看 images 大小: 大約 141M
[root@test web]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
web latest 23accfd5cd07 5 minutes ago 140.5 MB
docker.io/opensuse latest 09b54e62aa03 3 weeks ago 132.4 MB
開 web
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