Resetting a Windows guest’s Administrator password with guestfish

Submitted by alvaro.soto on Thu, 10/14/2021 - 23:07

DISCLAIMER: this is not my post is only a copy, in case the original get deleted or whatever, posting on my personal blog get easier for me to find it. You can find the original one in this link at the end of the post. I recently found myself with a Windows guest for which I didn’t have the Administrator password or any way of getting it. Nevertheless, I needed to make configuration changes to it. As I had no need to recover the old password, I was looking for a way to simply replace the Administrator password with one of my choices.

TripleO Container steps

Submitted by alvaro.soto on Sat, 06/27/2020 - 01:43

Container steps

Similar to baremetal, containers are brought up in a stepwise manner. The
current architecture supports bringing up baremetal services alongside of
containers. Therefore, baremetal steps may be required depending on the service
and they are always executed before the corresponding container step.

The list below represents the correlation between the baremetal and the
containers steps. These steps are executed sequentially:


View the list of images on the undercloud’s docker-distribution registry

Submitted by alvaro.soto on Sat, 06/27/2020 - 01:36

To view the list of images on the undercloud’s docker-distribution registry using the following command:

(undercloud) $ curl | jq .repositories[]

To view a list of tags for a specific image, use the skopeo command:

(undercloud) $ curl -s | jq .tags


fake_pxe as pm_type in RHOSP13 (TripleO + OpenStack Queens)

Submitted by alvaro.soto on Thu, 05/23/2019 - 02:00

So, in RHOSP13 fake_pxe is being deprecated to change in RHOSP14 for manual-management, the problem is that is just in between the migration, so there is not a clean way to use fake_pxe in RHOSP13. Other change is in the installation of undercloud, the option enabled_drivers is now DEPRECATED an changed by enabled_hardware_types. What now, in order to being able to use fake_pxe as a pm_type first install the undercloud without the options enabled_drivers, only use enabled_hardware_types and add at the end manual-management, like this:


How to disable Cloud-Init in a EL Cloud Image

Submitted by alvaro.soto on Wed, 12/12/2018 - 13:20

So this one is pretty simple. However, I found a lot of misinformation along the way, so I figured that I would jot the proper (and most simple) process here.

Symptoms: a RHEL (or variant) VM that takes a very long time to boot. On the VM console, you can see the following output while the VM boot process is stalled and waiting for a timeout. Note that the message below has nothing to do with cloud init, but its the output that I have most often seen on the console while waiting for a VM to boot.

[106.325574} random: crng init done

Ceph recovery backfilling affecting production instances

Submitted by alvaro.soto on Wed, 06/14/2017 - 21:06

In any kind of distributed system you will have to choose between consistency, availability and partitioning, the CAP theorem states that in the presence of a network partition, one has to choose between consistency and availability, by default (default configurations) CEPH provides consistency and partitioning, just take in count that CEPH has many config options: ~860 in hammer, ~1100 in jewel, check this out, is jewel github co