Issue while installing docker inside s390x container under qemu

[multiarch]

Issue while installing docker inside s390x container under qemu

[junaruga]

What is the host OS? Ubuntu?

I am not sure about the issue.
https://stackoverflow.com/questions/44678725/cannot-connect-to-the-docker-daemon-at-unix-var-run-docker-sock-is-the-docker

The docker run --rm --privileged multiarch/qemu-user-static --reset -p yes installs the following files with flags: F.

If you can find it.

/proc/sys/fs/binfmt_misc/qemu-$arch

First you can try Travis arch: s390x, can you do the operation without QEMU in the environment?

Next you can try the following apt package. May it also overrides teh binfmt_misc files.

$ apt-get install -y binfmt-support

If still does not work, it might be QEMU issue.
You can ask it on QEMU issue tracker showing your binfmt_misc file

/proc/sys/fs/binfmt_misc/qemu-s390x

[rajaskakodkar]

What is the host OS? Ubuntu?

Yes, Ubuntu 18.04

/proc/sys/fs/binfmt_misc/qemu-$arch

Contents of this file are

enabled
interpreter /usr/bin/qemu-s390x-static
flags: F
offset 0
magic 7f454c4602020100000000000000000000020016
mask ffffffffffffff00fffffffffffffffffffeffff

First you can try Travis arch: s390x, can you do the operation without QEMU in the environment?

I cannot do without QEMU in the environment

I have reported this bug on qemu issue tracker https://bugs.launchpad.net/qemu/+bug/1880518

[junaruga]

Contents of this file are

Sure, this is expected one.

I cannot do without QEMU in the environment

I meant if you use Travis CI's s390x native host feature, you can build and run your s390x Dockerfile container without QEMU, you can know the error by apt-get install -y --no-install-recommends docker-ce=18.06.* comes from QEMU or s390x architecture specific.
You can see https://docs.travis-ci.com/user/multi-cpu-architectures/ for detail.

I have reported this bug on qemu issue tracker https://bugs.launchpad.net/qemu/+bug/1880518

Nice! Thank you for that.

[rajaskakodkar]

I meant if you use Travis CI's s390x native host feature, you can build and run your s390x Dockerfile container without QEMU, you can know the error by apt-get install -y --no-install-recommends docker-ce=18.06.* comes from QEMU or s390x architecture specific.

The error appears on s390x native container, but it does not stop docker from starting. docker in docker works flawlessly on s390x native host. Following trick worked to get docker service up on s390x container under QEMU.

printf '{"iptables": false,"ip-masq": false,"bridge": "none" }' > /etc/docker/daemon.json

but docker pull fails with this error

failed to register layer: Error processing tar file(exit status 1):

I have mentioned this in the bug reported on qemu issue tracker.

[vitt-bagal]

This is can be closed as corresponding qemu issue is closed