pack: pack doesn't honor `DOCKER_HOST` using `ssh`

Summary

pack doesn’t honor DOCKER_HOST that uses ssh.

Reproduction

Have docker running on a remote host that is accessible via ssh.
Optionally enable passwordless ssh access by setting an authorized_keys file on the remote host.
Run the following:

> set -x DOCKER_HOST 'ssh://ubuntu@192.168.1.130'  # chang the IP to the remote host you setup
> docker images  # confirm you see images from the remote host
REPOSITORY   TAG       IMAGE ID       CREATED       SIZE
ubuntu       focal     1318b700e415   3 weeks ago   72.8MB
> pack build maven   # fails, trying to connect over HTTP to the remote host, but the remote host uses SSH access
ERROR: failed to build: failed to fetch builder image 'index.docker.io/paketobuildpacks/builder:base': error during connect: Post "http://ubuntu%40192.168.1.130/v1.38/images/create?fromImage=paketobuildpacks%2Fbuilder&tag=base": dial tcp: lookup ubuntu@192.168.1.130: no such host

SSH is a convenient and secure way to access a remote docker host. It would be nice if this worked.

Environment

> pack --version
0.20.0+git-66a4f32.build-2668

> docker version
Client:
 Cloud integration: 1.0.17
 Version:           20.10.7
 API version:       1.41
 Go version:        go1.16.4
 Git commit:        f0df350
 Built:             Wed Jun  2 11:56:22 2021
 OS/Arch:           darwin/amd64
 Context:           default
 Experimental:      true

Server: Docker Engine - Community
 Engine:
  Version:          20.10.8
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.16.6
  Git commit:       75249d8
  Built:            Fri Jul 30 19:52:33 2021
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.4.9
  GitCommit:        e25210fe30a0a703442421b0f60afac609f950a3
 runc:
  Version:          1.0.1
  GitCommit:        v1.0.1-0-g4144b63
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

About this issue

Original URL
State: closed
Created 3 years ago
Comments: 20 (18 by maintainers)

Most upvoted comments

Just wanted to add that this prevents using Podman with pack on the Mac as Podman runs in a VM. With all of the noise around finding alternatives to Docker Desktop for the Mac, it would be REALLY nice to have this work.

joshuawhite929 on Sep 2, 2021

Sorry, disregard my failures. Too early, not enough caffeine in my body.

I had used ssh://ubuntu@localhost:222 as my URL in the example but was running ssh://ubuntu@127.0.0.1 to add the host key. Once I trusted the key for localhost it worked fine.

dmikusa on Sep 16, 2021