Add docker image

[osiloke]

• Adds customizable docker image for running tunneld

[mmatczuk]

Thanks, I'll review it next week as I'm on a conference.

[ubergesundheit]

Hi @osiloke,

I've built your image successfully with some changes:

In the builder:

RUN apk add --no-cache git ca-certificates \
	&& go get -v github.com/mmatczuk/go-http-tunnel/cmd/tunneld

In the final image:

RUN apk add --no-cache openssl ca-certificates

ENV COUNTY="US" \
  STATE="New Jersey" \
  LOCATION="Piscataway" \
  ORGANISATION="Ecample" \
  ROOT_CN="Root" \
  ISSUER_CN="Example Ltd" \
  PUBLIC_CN="example.com" \
  ROOT_NAME="root" \
  ISSUER_NAME="example" \
  PUBLIC_NAME="public" \
  RSA_KEY_NUMBITS="2048" \
  DAYS="365"

Also, are you sure the env key COUNTY shouln't be COUNTRY?

[ubergesundheit]

Sorry for hijacking..
The .sh files should be executable (chmod +x )

[rheinardkorf]

@osiloke I really like this but ran into some issues with creating and reading the certs... I mapped /etc/ssl/certs to a different volume than in the README.md.

Error sample:

[i] Start OpenSSL, cert file save path: /etc/ssl/certs
[i] Generate root.crt
Generating RSA private key, 2048 bit long modulus
....+++
.....................................+++
e is 65537 (0x10001)
Cannot modifiy certificate subject
cp: can't stat 'root.crt': No such file or directory

Also, like @ubergesundheit mentioned, I had to chmod +x the .sh files in the Dockerfile because I got a permission error on entrypoint.sh.

I tried to follow the README.md, but I feel it misses critical build steps that would make this addition even more friendly.

[ubergesundheit]

It would make even more sense to use a docker volume to store the certificates or even use certificates obtained from lets encrypt.

Create docker image:
docker volume create tunnel-certs
And then
docker run -v tunnel-certs:/etc/ssl/certs -p 4443:4443 tunneld/tunneld

[thdxr]

Is there a plan to get this published in Docker Hub?

[mmatczuk]

There is a plan to do that yet right now the focus is on streamlining the tunnel usage. Based on that there will be an official docker image.

[MichelDiz]

Some news for this official image?

[gpatri]

This is my draft of a very optimized image (4meg). You can remove 'tunnel' for server need (2meg)

FROM golang:alpine as builder
EXPOSE 80 443 5223

RUN apk add --update bash git upx && rm -rf /var/cache/apk/*
RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go get -u -ldflags="-s -w" -u github.com/mmatczuk/go-http-tunnel/cmd/...
RUN upx -5 /go/bin/tunnel
RUN upx -5 /go/bin/tunneld

FROM scratch
COPY --from=builder /etc/passwd /etc/passwd
EXPOSE 5223

COPY --from=builder /go/bin/tunneld /go/bin/tunneld

optional

COPY --from=builder /go/bin/tunnel /go/bin/tunnel

Run it:
docker run -d -v pwd:/tunnel go-tunnel /go/bin/tunneld -tlsCrt /tunnel/server.crt -tlsKey /tunnel/server.key