Run Docker container in Docker

Drone Support
1

Is it possible to run a docker container in docker, in cloud.drone.io? I want to set up multi-arch Docker image building through QEMU, so I need:

docker run --privileged docker/binfmt:820fdd95a9972a5308930a2bdfb8573dd4447ad3

Sadly, it returns:

docker: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?.

Here’s how it works in Travis CI:
https://docs.travis-ci.com/user/docker/

Thanks

2

Drone cloud does not support running Docker-in-Docker for security reasons. If you need to access to the Docker daemon you will need to install and host your own Drone instance.

3

Is there another way to build multi-arch Docker images then?

4

use the official docker plugin. http://plugins.drone.io/drone-plugins/drone-docker/

this is what we use to build multi-arch images for Drone and all Drone plugins.

5

How do you set it up to build multi-arch? I couldn’t find any settings about that.
Thank you

6

create multiple pipelines in your yaml (one for each architecture)
https://docs.drone.io/configure/pipeline/multiple/

you can specify the target architecture using the platform stanza:
https://docs.drone.io/pipeline/docker/syntax/platform/

---
kind: pipeline
name: arm64

platform:
  arch: arm64

steps: ...

---
kind: pipeline
name: arm64

platform:
  arch: amd64

steps: ...

...
7

Does this mean that there is no way to use Drone Cloud with more exotic architectures using emulation (QEMU)?