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Web services & databases

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THE KNOWLEDGE LIBRARY

Web services & databases

8 tutorials

Illustrative teaching lab with a seated operator, rack servers and a HAProxy HTTPS DEMO board.

Web Infrastructure2025/10/15

HAProxy with Let’s Encrypt and validated certificate renewal

Balance two HTTP backends behind HAProxy TLS, preserve HTTP-01, sanitize proxy headers and deploy renewed certificates with validation and rollback.

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Illustrative WIUNIX Academy studio with a seated operator and PostgreSQL, Patroni and etcd concept diagram.

Databases2025/10/13

PostgreSQL with Patroni: replication, quorum and safe switchover

Build a fresh PostgreSQL18/Patroni lab with TLS, three-member etcd quorum, WAL checks and a planned switchover, with explicit fencing and recovery limits.

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Illustrative WIUNIX Academy Caddy lab with Yuna seated at the keyboard, a configuration monitor and a private server.

Web Infrastructure2025/10/12

Set up Caddy with automatic HTTPS, step by step

Choose your Linux version, install Caddy, connect a private backend and verify automatic HTTPS—with copyable commands, expected results and fixes for common errors.

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Rose studies a Redis replication and three-Sentinel demonstration at a WIUNIX Academy workstation; fictional illustration.

Databases2025/10/11

Set up Redis Sentinel high availability on Ubuntu and Debian

Build one active Redis primary, two passive replicas and three independent Sentinel voters. Verify replication, discovery, controlled failover and safe recovery.

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Kate works at a MariaDB primary-replica GTID/TLS demonstration display in an illustrative WIUNIX Academy office.

Databases2025/10/06

Install MariaDB primary-replica replication with GTID and TLS

Build a fresh primary and read-only replica, seed a consistent InnoDB dataset, secure the channel with verified TLS and prove that new transactions arrive.

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Kate works at a WordPress and Nginx cache demonstration display in an illustrative WIUNIX Academy workspace.

Web Infrastructure2025/10/06

Install WordPress on Nginx with a privacy-safe FastCGI cache

Install WordPress, PHP-FPM and MariaDB over HTTPS, then cache only reviewed public pages and prove that sessions and password-protected content stay separate.

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Illustrative WIUNIX Academy networking desk with Kate, HAProxy LB-01 and LB-02, a conceptual virtual IP failover display; no operating system depicted.

Web Infrastructure2025/10/06

HAProxy + Keepalived: build an active/standby VRRP load balancer

Build two HAProxy nodes with a shared virtual IP, route traffic to healthy HTTP backends and verify real failover with Keepalived VRRP—on your selected Linux version.

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Rose seated at a protocol lab workstation with Nginx QUIC concepts and network devices; generated illustrative scene.

Web Infrastructure2025/10/06

Build Nginx with HTTP/3 and verify QUIC

Build Nginx, configure QUIC and prove real HTTP/3.

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