SumGuy's Ramblings
The art of wasting time.
Docker, self-hosting, AI/LLM, Linux, and DevOps — explained by someone who learned the hard way. No fluff, no enterprise jargon, just practical stuff that actually works on real hardware.
Recent Posts
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VLAN Trunking Gotchas Nobody Warns You
VLAN configured but traffic still breaks? Native VLAN mismatches, PVID traps on cheap switches, Proxmox bridge gotchas, and Docker macvlan fixes, with commands.
10 min read -
journald Structured Logging, No ELK
journald already stores structured key/value log fields. Learn to write custom fields, query them, and ship logs to one box before reaching for Loki or ELK.
12 min read -
AppFlowy vs Notion: Self-Host Your Notes
AppFlowy vs Notion in 2026: the self-host server is now proprietary and the free tier is one browser seat. Licensing, Docker Compose setup, and real prices.
12 min read -
Prompt Injection vs Your Coding Agent
Prompt-level defenses against injection are probabilistic and lose to a patient attacker. Here's the capability-level design that holds, with working configs.
14 min read -
SurrealDB vs Postgres: Real or Toy?
SurrealDB promises documents, graphs, search and realtime in one binary. I tested it against Postgres to see where that pitch holds up for self-hosters in 2026.
13 min read -
Batch Inference: One Model, 100 Users
Loading model weights, not math, is your GPU bottleneck. Continuous batching with llama-server serves many concurrent requests for close to the cost of one.
12 min read -
Stop Handing CI Jobs Root on Your Box
Self-hosted GitHub Actions, Forgejo, and GitLab runners can hand a forked pull request root on your box. Here is the isolation ladder that actually stops it.
13 min read -
OPNsense Multi-WAN Failover Guide
Configure OPNsense gateway groups for WAN failover and load balancing, then layer policy-based routing so specific hosts or VLANs use a chosen WAN link.
14 min read -
Cluster API for Homelab k3s
Cluster API turns k3s cluster lifecycle into YAML: create, scale, and upgrade whole clusters as code with a management cluster, no more one off scripts.
11 min read -
RabbitMQ vs NATS: Pick a Message Bus
RabbitMQ vs NATS for a self-hosted app: routing, delivery guarantees, Docker Compose setups, Python code, and which broker to run for background jobs.
14 min read -
Meilisearch vs Typesense for Self-Hosters
Meilisearch and Typesense both promise instant search without Elasticsearch's weight. I ran both in Docker and picked a winner per self-hosted use case.
13 min read -
The Update That Broke Confidence
A 2026-09-22 patch left a self-hosted model's weights untouched but made it more confident on nonsense input. Six systems compared, real numbers only.
· Updated:18 min read
