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docker-1.13.1-99.gite467576.el7 has a regression:
# docker run --name foo alpine touch /a
# docker cp foo:a /tmp/b
Error response from daemon: Rel: can't make /var/lib/docker/overlay2/ff010e78b2cddbbfe2e9768b43f7094f0b15322219bd061d3d39293e7e650279/merged/a relative to a
We may still want to hold on this one. Just had a report that `docker cp testfile testctr:/tmp` is no longer copying the file to host (good), but is not copying it into the container either. Investigating.
Steps that should work but are not at the moment.
# docker run -t -i --name testctr --rm fedora bash
//Inside the container:
[root@ctrid /]# ln -s /tmp /test
//Outside the container:
# touch testfile; docker cp testfile testctr:/test
//In the container,
# ls /tmp
// Outside the container,
# ls /tmp
End result the file "testfile" is shown in the ls within the container, but NOT with the ls outside the container. Currently it is not showing in either place.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHSA-2019:1910