Notes tagged
#infrastructure
17 posts
- 3 min read
My SSH key sat in a plain file — while the same chip guarded my email password
macOS has a native command for hardware SSH keys in the Secure Enclave — sc_auth. Here's what actually works.
- 5 min read
Russian open models on my own Blackwell — and where NVFP4 breaks
An open RU-model ladder on an RTX PRO 6000: the dense 27B takes the top, a 12B lands half a step behind at half the size, and NVFP4 on Blackwell came up for only one of three.
- 2 min read
Fixed NVFP4 on Blackwell — it was missing CUDA 12.9
Two Blackwell bugs turned out to be one CUDA-toolkit gap, not a vLLM bug. Both models run NVFP4 now; memory ran 4-5GB heavier than the morning estimate.
- 2 min read
Do I even need my own GPU?
VRAM is tight, rental's rising. I sat down to pick a GPU — and the real question turned out to be whether I need one at all.
- 3 min read
It's not a camera
Spent today sketching out a product that doesn't exist yet. By evening it was clear: it's not a camera. It's an AI system where the hard part runs on the phone — and I'm giving that part away free.
- 6 min read
Thirteen sites under 152-FZ in a day — and ten minutes down over a single dollar sign
Closed 152-FZ across thirteen csylabs sites in a day — and lost ten minutes of production over how docker compose reads $ in .env values.
- 2 min read
Building a platform so my team can learn how I operate
Courses, onboarding, and ops tooling should not be separate theory. They should be the environment where the team learns to ship real systems.
- 8 min read
I moved csylabs to Selectel overnight — but the story is not speed
The overnight migration from Servers.ru to Selectel took about 50 minutes of active cutover time. The point is not speed, but keeping production properties intact: mail, mesh, backups, DNS, and runbooks.
- 4 min read
Youth sports: the point is not the tournament, it is the infrastructure
Youth sports does not run on one tournament. It runs on boring infrastructure: courts, schedules, insurance, parent communication, and cheap coverage of every game.
- 4 min read
Three Proxmox-on-ZFS installs, three UEFI shells
Tried to install Proxmox with ZFS on new hardware. Dropped to UEFI shell. Not once — three times. Root cause is in how ZFS-Proxmox boots. Found the safety-net recipe; will verify on the next install.
- 3 min read
Thought it was one thing, turned out to be another: 4Kn drives broke the ZFS boot
A correction to the morning post. The root cause wasn't in systemd-boot, wasn't in the fallback path. Provider support went a layer below, swapped physical disks, and the install worked.
- 3 min read
iCloud isn't renewing — three options for the family
My sister's iCloud subscription stopped renewing — the card isn't accepted anymore, and her photos will stop syncing soon. Familiar story for a lot of people in Russia right now. Three working paths, from simplest to fully self-hosted.
- 3 min read
Notes on NFS — or why you might need Proxmox Backup Server
The previous post ended with 'let's go' — first backup running tonight. In the morning I opened the panel. Interface doesn't load. :)
- 4 min read
Spun up my own video node over the weekend
A weekend project: self-hosted streaming node with SRT in, HLS/WebRTC/RTMP out, and identifiers-as-keys instead of passwords.
- 2 min read
A backup on the same machine is not a backup
After rebuilding the infrastructure, I had to set up the backup schema from scratch — connected the home NAS to the private mesh and closed 3-2-1.
- 2 min read
Sound: yes. Video: no.
The first inbound stream hit the media server with a metadata bug — video data was on the wire but the server couldn't see it. Found it in an hour.
- 3 min read
Shipped the blog in one evening
Zero to daniel.csylabs.com in one evening. Stack, what broke along the way, and how it got fixed.