4:23 a.m.
almost certainly a dumb question, but i'm unclear on how
.dockerignore interacts with podman in the sense of not passing
certain objects as part of the "build context."
with docker, entries in .dockerignore are explicitly not added to
the context passed to the daemon, so any attempt to, say, COPY or ADD
ignored entries in the Dockerfile are doomed to failure. i tested this
first with docker (on ubuntu) by copying /etc/{passwd,group} to a
build directory, with a Dockerfile that did:
COPY passwd group /
and that worked fine. when i added in .dockerignore the single line
passwd
predictably, the COPY failed not being able to find passwd. so far, so
good.
when i tried the same on fedora 31 with podman 1.6.2, the COPY
worked fine. my early assumption was that podman would ignore
.dockerignore since there is no daemon to which to send the bundled
context, but i've also read elsewhere that podman does *something*
with .dockerignore, although i'm not sure what. and "man podman-build"
makes no mention of .dockerignore.
thoughts?
rday