Kolla creates an admin.rc file using the environment variables. I want to then use this in a terraform plan, but I’d rather not generate terrafoprm specific code for the Keystone login data. So, a simple python script converts from env vars to yaml.
If you lock down everything, you either need to hand out keys, or plan on doing everything yourself, and getting overwhelmed.
Probably the single most power ful tool in Linux land to keep people from having to be “root” is the group concept. For example, if I want people to run Docker containers, they need to be able to talk to the Docker socket. The root user can do this by virtue of its global access. However, the more limited access approach is to add a user to the docker group.
Continue readingRecently, the playback on Musescore became distorted. It was sped up, the notes were dissonant (no that is not my writing!) and they seemed to crackle and pop.
When both systems I have exhibited the same problem, I knew it was an upgrade issue, and not my hardware.
This phenomenon seems to have occurred a few times over the years, and I tried many of the recommended fixes. What finally worked was changing the output from PulseAudio to Jack.
Continue readingI have a fresh install of Fedora 35 on a lab machine. I want to run a virtual machine on it. I have ssh access to the root account and a public key copied over.
Continue readingI recently came across a posted solutions to the 6s problem. I’m going to argue that several these solutions are invalid. Or, more precisely, I am going to argue that they are only conidered valid due to a convention in notation.
Continue readingI have to pull the log out of a docker process to figure out why it is crashing. The Docker container name is ironic_ipxe.
cat $( docker inspect ironic_ipxe | jq -r '.[] | .LogPath' ) |
I’ve set up a second cluster, and the Ironic nodes are not PXE booting. Specifically, if I watch the nodes boot via an IPMI serial-on-lan console, I see that they send out a DHCP request and never get a response back.
This is a problem I am familiar with from my days at Penguin. Time to dig in and understand the networking setup on the controller to see why it is not getting the packet. Or, possibly, why it is getting it and the response is getting dropped.
I have another cluster that is working properly, and I am going to look at the setup there to try and contrast it with the broken set up, and figure out my problem.
Continue readingI’m working with API data from a netbox instance. I want to select a device-typ URL based on the manufacturer. However, the value “manufacturer” in the result is a dictionary. I want to select where that manufacturer has the name “Ampere” or some other manufacturer.
Continue readingAARCH64 has a lot of general purpose registers. How many? Lets see.
Continue readingWhile multiplication is defined in the context of repeated addition, implementing it that way algorithmically is not nearly as efficient as some other approaches. One algorithm for multiplication that is an order of magnitude faster is to halve one number while doubling the other. I gave myself the challenge of implementing this algorithm in AARCH64 Assembly, and it was not too hard.
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