halbritt

9 ms·

31.
by halbritt 6y ago
My AC stopped working. In my spare time, I learned a new trade and replaced all my ductwork, the air handler, and the compressor unit with a new modern VRF system and am presently enjoying my air-conditioned home in this bay area heat wave
32.
by halbritt 6y ago
Micropython can do some real-time stuff. It's limited, but a bit easier in my experience than getting a Preempt-RT running on a Raspberry Pi.
33.
by halbritt 6y ago
They really push the pyboard which is cool and all, but imho, the killer application for Micropython has been the ESP8266 port and now the ESP32. The original pyboard can be had for around $20 and used to be closer to $30. The ESP8266 is a
34.
by halbritt 6y ago
> do you have about a million dollars to spend on building and maintaining it all? Then you need Kubernetes. I think you're overstating the investment necessary to overcome the initial complication of Kubernetes and also understatin
35.
by halbritt 6y ago
Precisely. In my experience hosting services in VMs on-prem I was able to achieve roughly 30% efficiency across 3k instances and hundreds of nodes. In my experience hosting microservices on k8s, I was able to achieve 80% efficiency across
36.
by halbritt 6y ago
This facilitates a benefit that I think has been described as "self-contained systems". There's one website on the topic, that imho is too narrowly focused and seeks to distinguish itself from microservices incorrectly, I th
37.
by halbritt 6y ago
For anyone following this, here I am 12 hours later after having dined on a relatively low-carb meal with some sweet potatoes and a couple of small bites of the wife's dessert of crème brûlée. I've yet to have breakfast and did s
38.
by halbritt 6y ago
"Real ketosis" is the presence of markers that demonstrate fat metabolism. This is most commonly done by measuring beta-hydroxybutyrate with the same device that diabetics use to measure blood glucose (using a different kind of t
39.
by halbritt 6y ago
You'd be surprised how little corporate bureaucracy values the act of "keeping the lights on" for an existing and stable revenue stream. Obviously, keeping the money hose going is good for the business, but it only gets reco
40.
by halbritt 6y ago
I'm familiar with at least one use case. The largest company that builds the NICs for smart meters has its own custom wireless network technology, but on top of that runs IPv6 so that it can communicate with millions of devices.
41.
by halbritt 6y ago
> Eventually, of course, the dam is going to break and IPv6 will become ubiquitous. By all accounts, many of us in the networking space predicted that this would absolutely, positively, without a doubt occur by 2010.
42.
by halbritt 6y ago
> Cloudflare's core business is networking. It actually embarrasses me to see that Cloudflare YOLO'd a BGP change in a Juniper terminal without peer reviews and/or without a proper administration dashboard, exposing safe(g
43.
by halbritt 6y ago
I'm familiar with these having used DCOS a fair bit. >K8s is great, but we should be careful not to rewrite history. Why's that? That's kind what tech is all about, no?
44.
by halbritt 6y ago
I also love k8s and agree with the author. K8s gives us declarative infrastructure with eventual reconciliation. That's massive, and there's nothing else around that really does that. I have a hard time taking anyone sesriously t
45.
by halbritt 6y ago
Eh, there are lots of other shipbuilding channels out there that are lackluster by comparison. Louis Sauzedde and Leo Sampson Goolden are the best, by far. I think that's the result of their extensive experience and willingness to sh
46.
by halbritt 6y ago
> I’ve learned a lot from watching his videos and I’m happy to chip in a few bucks per month (as apparently are many other people). Likewise.
47.
by halbritt 6y ago
In Leo's case, he's obviously using the income to advance the project in ways that he couldn't otherwise, and for that, I really appreciate the revenue he's pulling in. For others, Colin Furze, for example, I'm left
48.
by halbritt 6y ago
One of my favorites. That man is a national treasure.
49.
by halbritt 6y ago
Louis Sauzedde isn't exactly an amateur, but his videos are wonderful. Folks should also check out Acorn to Arabella, actual amateurs, or Tally Ho. A couple of other fascinating wooden boat building projects.
50.
by halbritt 6y ago
In my previous gig (2017 timeframe), we moved from AWS instances with terraform plus chef which took a couple hours of focused engineer time to generate a new dev environment. This was after some degree of automation, but there were still
51.
by halbritt 6y ago
Historically speaking, convincing anyone to run data stores on k8s is a giant pain. This isn't helped by all the mythology around "k8s is great for stateless" further promoted by folks like Kelsey Hightower who firmly believ
52.
by halbritt 6y ago
I ran ~200 instances of Postgres in production for a SaaS product. This was on top of GCP persistent disk, which qualifies as quite good network storage, all of it backed up by what is now called Velero. This particular database was not a
53.
by halbritt 6y ago
People view SRE in many difference ways. If you were to go through the Google SRE book, there's nothing explicit in there about building "platform" or doing any infrastructure engineering. It's is a given that SRE build
54.
by halbritt 6y ago
Terraform in and of itself is declarative, but it behaves in an imperative sort of way with the various backends that it supports. These shortcomings all manifest themselves in how state is managed. Terraform state is declaratively describ
55.
by halbritt 6y ago
This blog seems self-contradicting. >The main benefit is independency In the absence of independency, a service development organization will hit a ceiling and fail to scale beyond that. While there may be a whole host of other problems
56.
by halbritt 6y ago
I've worked in places that had millions of dollars worth of infrastructure deployed and just by enabling NUMA awareness gained 50% again capacity. It's something that I frequently look for and more recently seems to be the default
57.
by halbritt 6y ago
Why would you want TF in k8s? That hurts my soul. Isn't exactly declarative, nor really imperative, mostly but not entirely idempotent, and worst of all, it has faux-state that may or may not reflect the actual state of the services.
58.
by halbritt 6y ago
Increases velocity as well. I have a set of developers that can focus on their code and not have to worry about the infrastructure, TLS certs, DNS, storage or whatever. That all gets abstracted away. For SRE, that gives one a common set of
59.
by halbritt 6y ago
This is precisely how Spinnaker behaves with Helm. It renders the template into manifests and then deploys them. Kinda loses the benefit of Helm hooks, but if one is using Spinnaker, there are other ways to do the same thing hooks can do.
60.
by halbritt 6y ago
The hot new technology for metrics is Prometheus and it's ilk which is pull-based.

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