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specgen: honor userns=auto from containers.conf

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when using the default userns value, make sure its value is parsed so
that userns=auto is parsed and the options for the storage are filled.

Closes: https://github.com/containers/podman/issues/12615

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
This commit is contained in:
Giuseppe Scrivano 2021-12-16 12:02:36 +01:00
parent 46a094a7a2
commit 89ee302a9f
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GPG key ID: 67E38F7A8BA21772
2 changed files with 33 additions and 0 deletions
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7
pkg/specgen/generate/container_create.go
View file

@ -9,6 +9,7 @@ import (
cdi "github.com/container-orchestrated-devices/container-device-interface/pkg"
"github.com/containers/common/libimage"
"github.com/containers/podman/v3/libpod"
"github.com/containers/podman/v3/pkg/namespaces"
"github.com/containers/podman/v3/pkg/specgen"
"github.com/containers/podman/v3/pkg/util"
spec "github.com/opencontainers/runtime-spec/specs-go"
@ -96,6 +97,12 @@ func MakeContainer(ctx context.Context, rt *libpod.Runtime, s *specgen.SpecGener
return nil, nil, nil, err
}
s.UserNS = defaultNS
mappings, err := util.ParseIDMapping(namespaces.UsernsMode(s.UserNS.NSMode), nil, nil, "", "")
if err != nil {
return nil, nil, nil, err
}
s.IDMappings = mappings
}
if s.NetNS.IsDefault() {
defaultNS, err := GetDefaultNamespaceMode("net", rtc, pod)

26
test/system/170-run-userns.bats
View file

@ -52,3 +52,29 @@ function _require_crun() {
run_podman 125 run --rm --group-add keep-groups --group-add 457 $IMAGE id
is "$output" ".*the '--group-add keep-groups' option is not allowed with any other --group-add options" "Check group leaked into container"
}
@test "podman userns=auto in config file" {
skip_if_remote "userns=auto is set on the server"
if is_rootless; then
egrep -q "^$(id -un):" /etc/subuid || skip "no IDs allocated for current user"
else
egrep -q "^containers:" /etc/subuid || skip "no IDs allocated for user 'containers'"
fi
cat > $PODMAN_TMPDIR/userns_auto.conf <<EOF
[containers]
userns="auto"
EOF
# First make sure a user namespace is created
CONTAINERS_CONF=$PODMAN_TMPDIR/userns_auto.conf run_podman run -d $IMAGE sleep infinity
cid=$output
run_podman inspect --format '{{.HostConfig.UsernsMode}}' $cid
is "$output" "private" "Check that a user namespace was created for the container"
run_podman rm -t 0 -f $cid
# Then check that the main user is not mapped into the user namespace
CONTAINERS_CONF=$PODMAN_TMPDIR/userns_auto.conf run_podman 0 run --rm $IMAGE awk '{if($2 == "0"){exit 1}}' /proc/self/uid_map /proc/self/gid_map
}