When in transient store mode, use rundir for bundlepath

This means we store things like config.json and the secret files
also on tmpfs, lowering wear on disk and leaving less stuff on disk
on an unclean shutdown.

Signed-off-by: Alexander Larsson <alexl@redhat.com>

libpod/container_internal.go

@@ -128,6 +128,9 @@ func (c *Container) rwSize() (int64, error) {
 // bundlePath returns the path to the container's root filesystem - where the OCI spec will be
 // placed, amongst other things
 func (c *Container) bundlePath() string {
+	if c.runtime.storageConfig.TransientStore {
+		return c.state.RunDir
+	}
 	return c.config.StaticDir
 }
 

libpod/container_internal_test.go

@@ -118,6 +118,7 @@ func TestPostDeleteHooks(t *testing.T) {
 	statePath := filepath.Join(dir, "state")
 	copyPath := filepath.Join(dir, "copy")
 	c := Container{
+		runtime: &Runtime{},
 		config: &ContainerConfig{
 			ID: "123abc",
 			Spec: &rspec.Spec{