Go's time doesn't work under the docker image from scratch

Question

Go code:

package main

import (
    "fmt"
    "time"
)

func main() {
    var local,_ = time.LoadLocation("Asia/Shanghai")
    fmt.Println(time.Now())
    fmt.Println(time.Now().In(local))
}

Dockerfile:

FROM scratch
COPY ./main /main
CMD [ "/main" ]

build.sh:

rm -rf main
CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o main  . 
docker build -t hello-go .
docker run hello-go

All the file are in one folder named hello-go. When I run my Go code in my osx. It works.

➜  hello-go go run main.go
2017-12-13 21:50:53.482933 +0800 CST m=+0.000350077
2017-12-13 21:50:53.483007 +0800 CST

When i build the docker image and start it. one error like this:

➜  hello-go ./build.sh
Sending build context to Docker daemon  1.937MB
Step 1/3 : FROM scratch
 --->
Step 2/3 : COPY ./main /main
 ---> 80da783f6c5d
Step 3/3 : CMD /main
 ---> Running in 85cb022b3ce2
 ---> 485ddd3a08dd
Removing intermediate container 85cb022b3ce2
Successfully built 485ddd3a08dd
Successfully tagged hello-go:latest
2017-12-13 13:52:59.861173734 +0000 UTC m=+0.000252335
panic: time: missing Location in call to Time.In

goroutine 1 [running]:
time.Time.In(0xbe846a0ef355744e, 0x4d607, 0x539b80, 0x0, 0x0, 0x0, 0xc420037f70)
        /usr/local/go/src/time/time.go:1073 +0xc0
main.main()
        /Users/liujichun/Desktop/workspace/docker/hello-go/main.go:11 +0xee
➜  hello-go

I know the scratch image is empty. What should i do to make it.

Answer 1

Starting from Go 1.15, time/tzdata is available, just import the package in your main package.

Reference: https://golang.org/pkg/time/tzdata/

Answer 2

Docker FROM alphine

RUN apk --no-cache add tzdata

see answer in: https://stackoverflow.com/a/62159987/4143613