statx() requires Docker 18.04+

[daniviga]

Qt 5.10+ use statx() syscalls that are not allowed in unprivileged Docker containers running Docker < 18.04.

Refs:

• https://bugzilla.redhat.com/show_bug.cgi?id=1593842
• https://github.com/moby/moby/pull/36417

[daniviga]

On Fedora the issue can be workaround either:

• Installing Docker CE from Docker
• Installing moby-engine from Fedora repositories: sudo dnf install moby-engine

[mbernasocchi]

also note that docker-ce 18.04+ alone is not enough, the host must also have at least libseccomp2_2.3.3 which is not the case for ubuntu 18.04.1 (it has libseccomp2_2.3.1) dpkg -i libseccomp2_2.3.3-3ubuntu1_amd64.deb and restarting docker solves this on ubuntu 18.04.1

[mbernasocchi]

the docker-ce repo does unfortunately not have libseccomp

[daniviga]

Added https://github.com/gem/oq-qgis-server/blob/master/README.md#requisites

[daniviga]

We are now providing also containers based on Ubuntu with an older version of Qt.

We'll see in the future if remove Fedora and use just Ubuntu or whatever.

[daniviga]

also note that docker-ce 18.04+ alone is not enough, the host must also have at least libseccomp2_2.3.3 which is not the case for ubuntu 18.04.1 (it has libseccomp2_2.3.1) dpkg -i libseccomp2_2.3.3-3ubuntu1_amd64.deb and restarting docker solves this on ubuntu 18.04.1

18.04 now ships libseccomp 2.4.1-0ubuntu0.18.04.2 which addresses the issue