Open Stack

I'm trying to update the contents of an image, but it looks like it is
not working at all.

First I upload a test image:

---snip---
# dd if=/dev/urandom of=testing.img bs=1M count=10
# glance image-create --disk-format raw --container-format bare --name
TESTING --file testing.img
---snap---

Now I want to overwrite the contents of this image:

---snip---
# dd if=/dev/urandom of=testing.img bs=1M count=20
# glance image-update --file testing.img TESTING
---snap---

After this call the size of the image is still the same like before
(10485760 bytes).

I do not have issues in the logfiles of glance-api and glance-registry.

What am I doing wrong?

Is it not possible to update the contents of an image?

Christian.

-- 
Christian Berendt
Cloud Solution Architect
Mail: berendt at b1-systems.de

B1 Systems GmbH
Osterfeldstraße 7 / 85088 Vohburg / http://www.b1-systems.de
GF: Ralph Dehner / Unternehmenssitz: Vohburg / AG: Ingolstadt,HRB 3537