Description of problem:
I cannot rebuild src.rpm with disabled SELinux and enabled tmpfs plugin.
It works well with mock-1.3.4-1.fc26. It is not caused by change from chroot -> systemd-nspawn because I tested with --old-chroot
Version-Release number of selected component (if applicable):
sh$ rpm -q mock
Steps to Reproduce:
1. docker run --rm -ti --cap-add=SYS_ADMIN --cap-add=FOWNER docker.io/fedora:rawhide bash
2. dnf install -y -e0 -d0 mock
3. mkdir ~/.config
4. echo "config_opts['plugin_conf']['tmpfs_enable'] = True" > ~/.config/mock.cfg
5. curl -O https://kojipkgs.fedoraproject.org//packages/mock/1.4.1/1.fc26/src/mock-1.4.1-1.fc26.src.rpm
6. /usr/bin/mock --old-chroot --resultdir . --rebuild mock-1.4.1-1.fc26.src.rpm
Finish: dnf install
ERROR: Exception(mock-1.4.1-1.fc26.src.rpm) Config(fedora-rawhide-x86_64) 10 minutes 23 seconds
INFO: Results and/or logs in: .
INFO: Cleaning up build root ('cleanup_on_failure=True')
Start: clean chroot
INFO: unmounting tmpfs.
INFO: unmounting tmpfs.
Finish: clean chroot
ERROR: Could not find useradd in chroot, maybe the install failed?
No errors and rpms produced without any problem
BTW it works well with enabled/permissive SElinux
e.g. docker run --rm -ti --cap-add=SYS_ADMIN --cap-add=FOWNER -v =/sys/fs/selinux/:/sys/fs/selinux/ docker.io/fedora:rawhide bash
Or with disabled SELinux + --no-bootstrap-chroot
In both cases, tmpfs plugin was enabled.
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Works well with mock-1.4.9-1.fc26.noarch and also on f28