Ensure manually-created volumes have correct ownership

As part of a fix for an earlier bug (containers#5698) we added the ability
for Podman to chown volumes to correctly match the user running
in the container, even in adverse circumstances (where we don't
know the right UID/GID until very late in the process). However,
we only did this for volumes created automatically by a
`podman run` or `podman create`. Volumes made by
`podman volume create` do not get this chown, so their
permissions may not be correct. I've looked, and I don't think
there's a good reason not to do this chwon for all volumes the
first time the container is started.

I would prefer to do this as part of volume copy-up, but I don't
think that's really possible (copy-up happens earlier in the
process and we don't have a spec). There is a small chance, as
things stand, that a copy-up happens for one container and then
a chown for a second, unrelated container, but the odds of this
are astronomically small (we'd need a very close race between two
starting containers).

Fixes containers#9608

Signed-off-by: Matthew Heon <[email protected]>

libpod/options.go

@@ -1618,19 +1618,6 @@ func WithVolumeGID(gid int) VolumeCreateOption {
 	}
 }
 
-// WithVolumeNeedsChown sets the NeedsChown flag for the volume.
-func WithVolumeNeedsChown() VolumeCreateOption {
-	return func(volume *Volume) error {
-		if volume.valid {
-			return define.ErrVolumeFinalized
-		}
-
-		volume.state.NeedsChown = true
-
-		return nil
-	}
-}
-
 // withSetAnon sets a bool notifying libpod that this volume is anonymous and
 // should be removed when containers using it are removed and volumes are
 // specified for removal.

libpod/runtime_ctr.go

@@ -392,7 +392,7 @@ func (r *Runtime) setupContainer(ctx context.Context, ctr *Container) (_ *Contai
 		logrus.Debugf("Creating new volume %s for container", vol.Name)
 
 		// The volume does not exist, so we need to create it.
-		volOptions := []VolumeCreateOption{WithVolumeName(vol.Name), WithVolumeUID(ctr.RootUID()), WithVolumeGID(ctr.RootGID()), WithVolumeNeedsChown()}
+		volOptions := []VolumeCreateOption{WithVolumeName(vol.Name), WithVolumeUID(ctr.RootUID()), WithVolumeGID(ctr.RootGID())}
 		if isAnonymous {
 			volOptions = append(volOptions, withSetAnon())
 		}

libpod/volume_internal.go

@@ -17,6 +17,7 @@ func newVolume(runtime *Runtime) *Volume {
 	volume.config.Labels = make(map[string]string)
 	volume.config.Options = make(map[string]string)
 	volume.state.NeedsCopyUp = true
+	volume.state.NeedsChown = true
 	return volume
 }
 

test/e2e/run_volume_test.go

@@ -643,4 +643,30 @@ VOLUME /test/`
 		found, _ = session.GrepString("888:888")
 		Expect(found).Should(BeTrue())
 	})
+
+	It("volume permissions after run", func() {
+		imgName := "testimg"
+		dockerfile := `FROM fedora-minimal
+RUN useradd -m testuser -u 1005
+USER testuser`
+		podmanTest.BuildImage(dockerfile, imgName, "false")
+
+		testString := "testuser testuser"
+
+		test1 := podmanTest.Podman([]string{"run", "-v", "testvol1:/test", imgName, "bash", "-c", "ls -al /test | grep -v root | grep -v total"})
+		test1.WaitWithDefaultTimeout()
+		Expect(test1.ExitCode()).To(Equal(0))
+		Expect(strings.Contains(test1.OutputToString(), testString)).To(BeTrue())
+
+		volName := "testvol2"
+		vol := podmanTest.Podman([]string{"volume", "create", volName})
+		vol.WaitWithDefaultTimeout()
+		Expect(vol.ExitCode()).To(Equal(0))
+
+		test2 := podmanTest.Podman([]string{"run", "-v", fmt.Sprintf("%s:/test", volName), imgName, "bash", "-c", "ls -al /test | grep -v root | grep -v total"})
+		test2.WaitWithDefaultTimeout()
+		Expect(test2.ExitCode()).To(Equal(0))
+		Expect(strings.Contains(test2.OutputToString(), testString)).To(BeTrue())
+
+	})
 })