IT

Minimal Nginx template for HTTPS with HTTP → HTTPS and www → non-www redirects. No need for separate 80 and 443 vhosts if you only use 443 for traffic.

Redis is a powerful tool to store key-value data in various formats. Here’s a simple way to create failover replication. Sometimes people call this a Redis cluster, but in reality it’s just a few servers (preferably 3 for Sentinel quorum) with one master and multiple slaves in different configurations (slave of slave, slave by priority, local slave, etc.).

Sometimes you need a user-friendly interface for scripts. Using raw ARG0, ARG1… is messy. Here’s a clean example of parsing arguments like -h or -a=one in Bash.

Sometimes after running pip install --upgrade pip , pip fails with the error ImportError: cannot import name main . Here’s the simplest way to fix it.

How to protect iptables when using docker-compose . By default, Docker dynamically modifies iptables rules, which prevents normal firewall management. Many guides suggest saving Docker rules and restoring them later — I don't think this is a good approach. If Docker cannot handle firewall tasks properly, let's free it from this responsibility. See also docker-compose demonization with systemd .

Easy way to (auto)start your infrastructure with docker-compose . Very useful for development, review servers, pre-prod, or test environments. Also includes tips on protecting iptables when using docker-compose .

Sometimes you need to connect two AWS networks without using AWS managed VPN services. Most tutorials show a simple tunnel between two instances, but they ignore high availability. That usually leads to asymmetric routing or a single point of failure.