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Add containers.conf read-only flag support

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If you are running temporary containers within podman play kube
we should really be running these in read-only mode. For automotive
they plan on running all of their containers in read-only temporal
mode. Adding this option guarantees that the container image is not
being modified during the running of the container.

The containers can only write to tmpfs mounted directories.

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
This commit is contained in:
Daniel J Walsh
2022-12-10 06:35:58 -05:00
parent 2a46b5e117
commit 338b283935
14 changed files with 117 additions and 40 deletions
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13
test/system/030-run.bats
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@@ -951,4 +951,17 @@ $IMAGE--c_ok" \
run_podman stop -t 0 $cid
}
@test "podman run read-only from containers.conf" {
containersconf=$PODMAN_TMPDIR/containers.conf
cat >$containersconf <<EOF
[containers]
read_only=true
EOF
CONTAINERS_CONF="$containersconf" run_podman 1 run --rm $IMAGE touch /testro
CONTAINERS_CONF="$containersconf" run_podman run --rm --read-only=false $IMAGE touch /testrw
CONTAINERS_CONF="$containersconf" run_podman run --rm $IMAGE touch /tmp/testrw
CONTAINERS_CONF="$containersconf" run_podman 1 run --rm --read-only-tmpfs=false $IMAGE touch /tmp/testro
}
# vim: filetype=sh