If an OpenStack server (Ironic or Nova) has an error, it shows up in a nested field. That field is hard to read in its normal layout, due to JSON formatting. Using jq to strip the formatting helps a bunch
The nested field is fault.details.
The -r option strips off the quotes.
Continue readingMy team is running a small OpenStack cluster with reposnsibility for providing bare metal nodes via Ironic. Currently, we have a handful of nodes that are not usable. They show up as “Cleaning failed.” I’m learning how to debug this process.
Continue readingTo reinstall a machine that is managed by IPMI, you tell it to PXE boot and then power cycle. Here are my notes.
Continue readingQT_QPA_PLATFORM=xcb kdenlive |
I don’t understand, yet, why this works, but it does. Thanks to this post
It took me a few tries, but I finally got a passable demo/tutorial about Pipewire and QJackCtl.
Here’s the final version. Well, final for now.
Here’s the version before that that got hit by a copyright claim and thus was not visible in Canada. I chose the “auto edit” option to remove the copywritten material. I think that means that you don’t see how you can feed browser audio back into itself. I’ve not watched it since it got cut.
Here is the original Camcorder version. This was really the approach I wanted to take, with the camera picking up the same audio that I was hearing. But the video was unwatchable.
git archive --format=tar.gz -o ~/neptune3-ui-5.15.tar.gz 5.15 --prefix=neptune3-ui-5.15/ |
These are the options I needed. the -o says where to put the file, and the –prefix (with the / at the end) puts it in a subdir.
We do RPM things. Some of those RPM things need the /proc file system. Not forever, but for a short while. So we mount /proc, do something, and unmount. Which works fine.
Until we tried to do it in a container.
Continue readingWe are trying to enable the graphics hardware subsystem on the Raspberry Pi 4. This driver lives in mesa. The current Centos mesa.spec file does not enable the V3D Driver we need. Here are the steps I am going through to build the driver and integrate it into the meta-rpm build.
Continue readingIf you have requested a single host from beaker, the following one liner will tell the hostname for it.
bkr job-results $( bkr job-list -o $USER --unfinished | jq -r ".[]" ) | xpath -q -e string\(/job/recipeSet/recipe/roles/role/system/@value\) |
This requires jq and xpath, as well as the beaker command line packages.
For me on Fedora 33 the packages are:
Yocto takes up a lot of space when it builds. If the /home partition is 30 GB or smaller, I am going to fill it up. The systems I get provisioned from Beaker are routinely splitting their disks between / and /home. These are both logical volumes in the same volume group. This is easy to merge.
In order to merge them I find myself performing the following steps.
umount /home/ mkdir /althome |
I then modify /etc/fstab so that the /home entry is now pointing to /althome. If I have done any work in /home/ayoung (almost always) I have to copy it to the new /home partition
mount /alhome/ cp /althome/ayoung /home/ayoung |
Once the home volume has been cleared, I can reclaim the space. The following lines will vary depending on the name of the machine.
lvremove /dev/rhel_hpe-moonshot-02-c07/home lvresize -L +32.48G /dev/rhel_hpe-moonshot-02-c07/root |
I am explicitly reclaiming the size of the /home volume, which in this case is 32.48 GB.
A little bit of foresight can obviously avoid this problem; properly allocate the disks according to the workload. Requesting a machine with more disk is also an option.
But sometimes we have to fix mistakes.
Note that I use the lvdisplay command to see the names of the volumes.
In order to make use of the new space, I have to resize the file system. Since it is XFS, I use the xfs_grow command. I want the full size, so I don’t need to pass a parameter.
xfs_growfs /dev/mapper/rhel_hpe--moonshot--02--c07-root |