dlv connecthalting

I click left on function main, until a red point. Then click the green button, which like 'play'. Program in container run, but can not stop on function main.

Did I use VSCode in wrong way? I need your help. Thank you.

This is my delve image:

#Dockerfile
FROM supinf/go:1.8-builder

RUN apk --no-cache add tini \
&& apk --no-cache add --virtual build-dependencies git \

# Compile delve
&& go get github.com/derekparker/delve/cmd/dlv \
&& cd $GOPATH/src/github.com/derekparker/delve \
&& go install github.com/derekparker/delve/cmd/dlv \

# Clean up
&& apk del --purge -r build-dependencies \
&& rm -rf /go/src/*

ENTRYPOINT ["/sbin/tini", "--"]
CMD ["dlv", "-h"]

docker build -t mydelve .

This is my golang code:

package main

import (
    "fmt"
    "sync"
    "time"
)

func dostuff(wg *sync.WaitGroup, i int) {
    fmt.Printf("goroutine id %d
", i)
    time.Sleep(60 * time.Second)
    fmt.Printf("end goroutine id %d
", i)
    wg.Done()
}

func main() {
    var wg sync.WaitGroup
    workers := 10

    wg.Add(workers)
    for i := 0; i < workers; i++ {
            go dostuff(&wg, i)
    }
    wg.Wait()
}

This is cmd to run container:

docker run --rm -p 2345:2345 
           -v $GOPATH/src:/go/src 
           -w /go/src/test/dlv 
           --security-opt seccomp=unconfined 
           mydelve 
               dlv debug --headless --listen=:2345 --log`

connect to container

dlv connect 127.0.0.1:2345 --wd . --log

It works.

VSCode

launch.json

{
    "version": "0.2.0",
    "configurations": [
       {
            "name": "Remote",
            "type": "go",
            "request": "launch",
            "mode": "remote",
            "program": "${fileDirname}",
            "port": 2345,
            "host": "127.0.0.1",
            "env": {},
            "args": []
        }
    ]
}

Logs in container

$ docker run --rm -p 2345:2345 -v $GOPATH/src:/go/src -w /go/src/test/dlv --security-opt seccomp=unconfined mydelve dlv debug --headless --listen=:2345 --log
2017/05/22 09:07:56 server.go:73: Using API v1
2017/05/22 09:07:56 debugger.go:97: launching process with args: [/go/src/test/dlv/debug]
API server listening at: [::]:2345
2017/05/22 09:08:00 debugger.go:505: continuing
goroutine id 3
goroutine id 9
goroutine id 4
goroutine id 5
goroutine id 6
goroutine id 7
goroutine id 8
goroutine id 1
goroutine id 0
goroutine id 2
end goroutine id 6
end goroutine id 3
end goroutine id 9
end goroutine id 4
end goroutine id 5
end goroutine id 8
end goroutine id 7
end goroutine id 1
end goroutine id 0
end goroutine id 2
2017/05/22 09:08:10 debugger.go:496: halting