Run Zabbix 7.4 on Docker Compose with HTTPS (No Reverse Proxy, DNS-01 Certbot, Bind Mounts Only)
This post shows a clean way to run Zabbix Server + Zabbix Web (NGINX) + MariaDB using Docker Compose, and […]
Observability & Operations
Engineering field notes
Practical DevOps, Infrastructure, and Platform Engineering Notes
Tested walkthroughs from real lab and production-style setups across Linux, cloud, Kubernetes, networking, security, observability, data platforms, IoT, Android, and self-hosted services.
Identity, Security & PKI
Why Jenkins Keeps Logging You Out (OIDC + Keycloak): Finding and Fixing the Timeout Layer
When Jenkins is authenticated by Keycloak (OIDC) and sits behind NGINX, “session timeout” is not a single knob. You can
Identity, Security & PKI
Enable GitHub SSO for Teleport Community Edition
This guide enables GitHub login for a self-hosted Teleport Community Edition cluster using a GitHub OAuth App and maps GitHub
Identity, Security & PKI
Authenticate WordPress to Keycloak with OpenID Connect (OIDC) using a plugin
This post shows how to authenticate WordPress (https://www.maksonlee.com) against Keycloak (https://keycloak.maksonlee.com) using OpenID Connect (OIDC) with a WordPress plugin (no
Web Platforms & Applications
Configure WordPress SMTP with Zoho Mail Using Post SMTP
WordPress email delivery can be unreliable when it uses PHP mail (password resets, contact form notifications, admin alerts). The fix
Identity, Security & PKI
Upgrade Keycloak (Tarball + systemd + MariaDB) on Ubuntu 24.04
Short outage method: Stop → Backup → Upgrade → Start Example upgrade: 26.4.6 → 26.5.2 This post upgrades a Keycloak
Identity, Security & PKI
Enroll a Self-Hosted PostgreSQL into Teleport CE
This post shows how to enroll a self-hosted PostgreSQL (Ubuntu 24.04, PostgreSQL 16) into an existing Teleport Community Edition cluster
Identity, Security & PKI
Enroll a Kubernetes Cluster into Teleport CE (Helm)
This post follows Teleport’s official Kubernetes Access “Getting Started” flow, using the Web UI guided enrollment (Helm) and validating access
Identity, Security & PKI
Enroll an Ubuntu 24.04 Server as a Teleport SSH Resource (Community Edition, Web UI)
This is a follow-up to my Teleport installation guide: That post builds a single-node Teleport cluster (Auth + Proxy +
Identity, Security & PKI
Install Teleport Community Edition on Ubuntu 24.04 (Internal DNS + Let’s Encrypt DNS-01 via Cloudflare, TLS on :443)
This guide installs a single-node Teleport cluster (Auth + Proxy + SSH service on one host) on Ubuntu 24.04, secured