124 lines
3.4 KiB
Go
124 lines
3.4 KiB
Go
/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package client
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import (
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"os"
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"strings"
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"syscall"
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"testing"
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containerd "github.com/containerd/containerd/v2/client"
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"github.com/containerd/containerd/v2/oci"
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"github.com/containerd/containerd/v2/plugins/snapshots/overlay/overlayutils"
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"github.com/opencontainers/runtime-spec/specs-go"
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)
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func TestIDMappedOverlay(t *testing.T) {
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var (
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upperPath string
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lowerPaths []string
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snapshotter = "overlayfs"
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ctx, cancel = testContext(t)
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id = t.Name()
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)
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defer cancel()
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if ok, err := overlayutils.SupportsIDMappedMounts(); err != nil || !ok {
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t.Skip("overlayfs doesn't support idmapped mounts")
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}
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client, err := newClient(t, address)
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if err != nil {
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t.Fatal(err)
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}
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defer client.Close()
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image, err := client.Pull(ctx, testMultiLayeredImage, containerd.WithPullUnpack)
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if err != nil {
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t.Fatal(err)
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}
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t.Logf("image %s pulled!", testMultiLayeredImage)
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hostID := uint32(33)
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contID := uint32(0)
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length := uint32(65536)
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uidMap := specs.LinuxIDMapping{
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ContainerID: contID,
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HostID: hostID,
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Size: length,
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}
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gidMap := specs.LinuxIDMapping{
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ContainerID: contID,
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HostID: hostID,
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Size: length,
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}
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container, err := client.NewContainer(ctx, id,
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containerd.WithImage(image),
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containerd.WithImageConfigLabels(image),
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containerd.WithSnapshotter(snapshotter),
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containerd.WithNewSnapshot(id, image, containerd.WithRemapperLabels(uidMap.ContainerID, uidMap.HostID, gidMap.ContainerID, gidMap.HostID, length)),
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containerd.WithNewSpec(oci.WithImageConfig(image),
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oci.WithUserNamespace([]specs.LinuxIDMapping{uidMap}, []specs.LinuxIDMapping{gidMap}),
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longCommand))
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if err != nil {
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t.Fatal(err)
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}
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defer container.Delete(ctx, containerd.WithSnapshotCleanup)
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t.Logf("container %s created!", id)
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o := client.SnapshotService(snapshotter)
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mounts, err := o.Mounts(ctx, id)
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if err != nil {
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t.Fatal(err)
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}
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m := mounts[0]
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if m.Type != "overlay" {
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t.Fatalf("invalid mount -- %s; expected %s", m.Type, snapshotter)
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}
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for _, o := range m.Options {
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if strings.HasPrefix(o, "upperdir=") {
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upperPath = strings.TrimPrefix(o, "upperdir=")
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} else if strings.HasPrefix(o, "lowerdir=") {
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lowerPaths = strings.Split(strings.TrimPrefix(o, "lowerdir="), ",")
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}
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}
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t.Log("check lowerdirs")
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for _, l := range lowerPaths {
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if _, err := os.Stat(l); err == nil {
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t.Fatalf("lowerdir=%s should not exist", l)
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}
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}
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t.Logf("check stats of uppedir=%s", upperPath)
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st, err := os.Stat(upperPath)
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if err != nil {
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t.Fatalf("failed to stat %s", upperPath)
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}
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if stat, ok := st.Sys().(*syscall.Stat_t); !ok {
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t.Fatalf("incompatible types after stat call: *syscall.Stat_t expected")
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} else if stat.Uid != uidMap.HostID || stat.Gid != gidMap.HostID {
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t.Fatalf("bad mapping: expected {uid: %d, gid: %d}; real {uid: %d, gid: %d}", uidMap.HostID, gidMap.HostID, int(stat.Uid), int(stat.Gid))
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}
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}
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