Guatu

Engineer building AI agents, bare-metal K8s clusters, and IIoT systems. 7-node Proxmox homelab because cloud bills are optional. Consulting at guatulabs.com.

United States Joined on Mar 28, 2026 https://guatulabs.dev

Education

Bachelors of Science in Mechanical Engineering with minor in Aerospace Engineering

Work

Infrastructure, AI and Reliability engineering at Defense Contractor, Consulting Services Guatu Labs

Guatu

May 15

Privacy-Routed LLM Inference: Keeping Sensitive Data Out of the Cloud

#aiagents #localllm #privacy #ollama

6 min read

Guatu

May 14

Tailscale Subnet Routers: Accessing Your LAN Without the VPN Headache

#tailscale #networking #infrastructure #homelab

6 min read

Guatu

May 8

PCIe Device Passthrough: NIC Name Instability and MAC Pinning

#proxmox #pciepassthrough #networking #homelab

4 min read

Guatu

May 7

GPU PCI Address Instability: When Your Card Moves Between Reboots

#proxmox #gpupassthrough #pcie #homelab

2 min read

Guatu

May 6

Cognitive Memory for Agents: Vector Search vs Activation-Based Recall

#aiagents #vectordatabases #llmmemory #cognitivearchitecture

4 min read

Guatu

May 6

Vibration Monitoring Architecture: From Sensor to Dashboard

#iiot #vibrationanalysis #mqtt #influxdb

6 min read

Guatu

May 5

Unprivileged LXC + Docker: The runc Sysctl Permission Trap

#proxmox #lxc #docker #sysctl

3 min read

Guatu

May 4

AdGuard Home: Network-Wide DNS Filtering with Failover

#dns #adguardhome #infrastructure #kubernetes

2 min read

Guatu

Apr 30

Three-Layer Safety for Autonomous Agents: Stopping the Infinite Loop

#aiagents #llmops #mcpservers #ollama

7 min read

Guatu

Apr 25

Stop Merging Broken YAML: Kubernetes Manifest Validation in CI

#kubernetes #gitops #cicd #infrastructure

2 min read

Guatu

Apr 24

GPU D3cold Power States: How to Brick Your Card Without Trying

#gpupassthrough #d3cold #proxmox #nvidia

3 min read

Guatu

Apr 24

cert-manager + Cloudflare DNS-01: Automated TLS for Everything

#certmanager #cloudflare #kubernetes #tls

7 min read

Guatu

Apr 22

SealedSecrets Key Backup: Don't Lose Your Encryption Keys

#kubernetes #sealedsecrets #encryption #keymanagement

2 min read

Guatu

Apr 21

Ollama on Kubernetes: Recreate Strategy and Single-GPU Deadlock

#ollama #kubernetes #gpudeadlock #recreatestrategy

3 min read

Guatu

Apr 21

Wildcard DNS + ndots:5: The TLS Nightmare and How to Fix It

#kubernetes #dns #tls #networking

3 min read

Guatu

Apr 20

MQTT Broker Selection: HiveMQ vs Mosquitto for Industrial Use

#mqttbroker #iiot #security #scalability

4 min read

Guatu

Apr 18

Self-Improving AI Infrastructure: How Your Homelab Wiki Updates Itself

#aiagents #selfimprovingsystems #homelab #automation

4 min read

Guatu

Apr 17

The 6-Layer Memory Architecture I Run for Claude Code

#aiagents #claudecode #memory #rag

5 min read

Guatu

Apr 13

Building Karpathy's LLM Wiki: A Production Homelab Implementation

#aiagents #llmwiki #homelab #kubernetes

5 min read

Guatu

Apr 13

Proxmox API Tokens: Bash History Expansion and the ! Character

#proxmox #bash #apitokens #homelab

1 min read

Guatu

Apr 13

AMD iGPU Stealing Your RAM: UMA Frame Buffer on Headless Servers

#headlessservers #amdigpu #ramleak #umfframebuffer

3 min read

Guatu

Apr 10

Agent Credential Management: Two-Tier Service Accounts for Secure AI Agent Workflows

#aiagents #credentialmanagement #security #serviceaccounts

4 min read

Guatu

Apr 9

Pod Disruption Budgets: Why kubectl drain Gets Stuck on Longhorn

#kubernetes #longhorn #poddisruptionbudgets #nodedrain

2 min read

Guatu

Apr 9

Equipment Health Scoring: How One Number Made My Operators Stop Checking the Dashboard

#iiot #predictivemaintenance #sensordata #equipmenthealth

2 min read

Guatu

Apr 9

Infrastructure as Code, but Automated: OpenTofu and GitHub Actions

#infrastructure #opentofu #githubactions #gitops

5 min read

Guatu

Apr 7

Attention Residuals: How Kimi Is Rethinking Transformer Depth

#ai #transformers #llmarchitecture #attention

3 min read

Guatu

Apr 2

NVIDIA Container Toolkit: Why the Default Runtime Matters

#nvidiaruntime #containerd #kubernetes #aiagents

2 min read

Guatu

Apr 2

Kubernetes Storage on Bare Metal: Longhorn in Practice

#kubernetesstorage #longhorn #baremetal #homelab

5 min read

Guatu

Apr 2

Helm fullnameOverride: Naming Sanity in ArgoCD

#helm #argocd #kubernetes #naming

1 min read

Guatu

Apr 2

GPU Passthrough on Proxmox: A Field Guide to the Gotchas That Bit Me

#proxmox #gpupassthrough #homelab #nvidia

6 min read

Guatu

Mar 31

DOCP/XMP: Why Your Proxmox Node Runs at Half RAM Speed

#proxmox #homelab #xmp #docp

2 min read

Guatu

Mar 31

Multi-Agent AI Systems: Architecture Patterns That Actually Work

#aiagents #multiagent #llm #architecture

7 min read

Guatu

Mar 29

Building MCP Servers with FastMCP: Stop Writing Boilerplate, Start Writing Tools

#mcpservers #aiagents #python #llmtooling

7 min read

Guatu

Mar 28

AMD Ryzen C-State Freezes: How `processor.max_cstate=1` Saved My Proxmox Node

#proxmox #ryzen #homelab #cstate

3 min read

Guatu

Mar 28

GitOps for Homelabs: How ArgoCD App-of-Apps Scales Your Cluster

#gitops #argocd #kubernetes #homelab

7 min read

Guatu

Mar 28

Building a Production Homelab: Multi-Node Proxmox Cluster with Kubernetes

#proxmox #kubernetes #homelab #gitops

8 min read

Writing Debut