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Ollama Models for DevOps & Development

Comprehensive rating of Ollama models for DevOps tasks, backend development, and frontend development.

Top Tier Models (★★★★★)

Model	Size	DevOps	Backend	Frontend	Best For
deepseek-r1	1.5B-671B	★★★★★	★★★★★	★★★☆☆	Complex reasoning, debugging, infrastructure logic
qwen3-coder	30B-480B	★★★★★	★★★★★	★★★★☆	Agentic coding tasks, long-context code work

Local Offline AI Models for Coding — Sorted by Coding Strength

⭐ = relative strength for coding tasks (higher is better)
All models can run 100% offline after download using tools like Ollama, GPT4All, LM Studio, Jan, or LocalAI

Model / Platform	Coding Strength	DevOps / CLI	Python Backend	Frontend (JS/React)	Typical RAM	Notes
Qwen 2.5 Coder (32B)	⭐⭐⭐⭐	⭐⭐⭐⭐	⭐⭐⭐⭐	⭐⭐⭐	32 GB+	One of the strongest local coding models
CodeLlama (34B)	⭐⭐⭐⭐	⭐⭐⭐	⭐⭐⭐⭐	⭐⭐⭐	32 GB+	High-quality code generation, slower/heavier
Llama 3.1 (70B)	⭐⭐⭐⭐	⭐⭐⭐	⭐⭐⭐	⭐⭐	48 GB+	Massive context, very heavy hardware requirements

OpenReplay Post-Upgrade Fix: Health API 404

Problem

After running openreplay -u, the /v2/api/* endpoints return 404 because the ingress gets reset to default values that point to the wrong backend service.

Root Cause

The api-openreplay ingress routes to api-openreplay:8080 (Go server)
But the actual API (health, signup, etc.) lives on chalice-openreplay:8000 at /api/*
The rewrite target also needs to be /api/$1 instead of /$1

Exec into a Pod by Label

kubectl exec doesn't support label selectors directly. Use a subshell to grab the pod name first:

kubectl exec -it $(kubectl get pod -l app.kubernetes.io/name=api -o jsonpath='{.items[0].metadata.name}') -- bash

Edge Cases

Multiple pods? This grabs the first one. List all with:

Resizing a Linux Disk After VM Expansion

1. Rescan the disk to detect new size

echo 1 > /sys/class/block/sda/device/rescan

Verify with lsblk — disk should now show the new size.

Network Learning Roadmap: Zero to Hero

A question-based study guide for beginners.

Phase 1: Fundamentals

What is a network and why do we need it?
What is the OSI model and what happens at each layer?

ZeroTier: Technical Deep Dive, Implementation, and Comparisons

1. ZeroTier's Aim and Goals

ZeroTier is a software-defined networking (SDN) platform that creates virtual Ethernet networks (VLANs) spanning any physical infrastructure—LAN, WAN, cloud, or mobile networks. The core philosophy is:

"Decentralize until it hurts, then centralize until it works."

Primary Goals

Global virtual LAN: Make geographically distributed devices appear on the same Layer 2 network

MikroTik OpenVPN Authentication Modes

Overview

There are three authentication modes for OpenVPN on MikroTik:

Mode	Server Setting	Client Needs	Security Level
User/pass only	`require-client-certificate=no`	CA + username/password	Basic
Cert only	`require-client-certificate=yes`	CA + client cert/key	Good

Get in the rails console

sudo gitlab-rails console -e production

then:

user = User.find_by_username('root')
user.password = 'new_password_here'
user.password_confirmation = 'new_password_here'

	#!/usr/bin/env python3
	"""
	Fetch IP delegations from all 5 RIRs and extract CIDRs for a specific country.
	Handles non-power-of-2 allocations by expanding into multiple CIDRs.

	Usage:
	python get_country_cidrs.py IR # IPv4 to stdout
	python get_country_cidrs.py IR -o IR.txt # IPv4 to file
	python get_country_cidrs.py US -6 -o US_v6.txt # IPv6 only
	python get_country_cidrs.py DE -4 -6 # Both IPv4 and IPv6