docs: initial VM documentation

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+# VM Dokumentation – opensuse-4gb-nbg1-4
+
+Stand: 2025-08-14T17:19:07+00:00
+
+## System
+- Hostname: opensuse-4gb-nbg1-4
+- OS: openSUSE Leap 15.6
+- Kernel: 6.4.0-150600.23.53-default
+- Podman: podman version 5.5.2
+- Node: v20.19.2
+- npm: 10.8.2
+- Rust: rustc not installed
+- Cargo: cargo not installed
+
+## Netzwerk/Ports (Auszug)
+
+
+
+## Container-Stack (Podman, Host-Networking)
+
+
+
+### Reverse Proxy (Caddy)
+Caddyfile unter `/root/Caddyfile`:
+
+
+## Netzwerk/Ports (Auszug)
+
+    Netid State  Recv-Q Send-Q Local Address:Port  Peer Address:PortProcess                                                                                                                                                                         
+
+## Container-Stack (Podman, Host-Networking)
+
+    NAMES               IMAGE                                            STATUS       PORTS
+f42c882bb639-infra  localhost/podman-pause:4.9.5-1748865600          Up 5 days    0.0.0.0:3002->3000/tcp, 0.0.0.0:8081->8080/tcp, 0.0.0.0:9090->9090/tcp, 0.0.0.0:9093->9093/tcp, 0.0.0.0:9100->9100/tcp
+snake-test          localhost/snake-game:test                        Up 5 days    0.0.0.0:3006->3003/tcp
+gitea               docker.io/gitea/gitea:1.21                       Up 5 days    22/tcp, 3000/tcp
+caddy               docker.io/library/caddy:2-alpine                 Up 5 days    80/tcp, 443/tcp, 2019/tcp, 443/udp
+woodpecker-agent    docker.io/woodpeckerci/woodpecker-agent:latest   Up 4 days    3000/tcp
+woodpecker-server   docker.io/woodpeckerci/woodpecker-server:latest  Up 4 days    80/tcp, 443/tcp, 8000/tcp, 9000/tcp
+rust-server         localhost/rust-server:latest                     Up 19 hours  127.0.0.1:3010->8080/tcp
+rust-game           docker.io/didstopia/rust-server:latest           Up 4 hours   0.0.0.0:28015-28016->28015-28016/tcp, 0.0.0.0:28015->28015/udp, 8080/tcp, 28082/tcp
+
+### Reverse Proxy (Caddy)
+Caddyfile unter `/root/Caddyfile`:
+
+    git.pp1l.de {
+    reverse_proxy localhost:3000
+}
+
+ci.pp1l.de {
+    reverse_proxy localhost:8000
+}
+
+# Rust Service
+rust.pp1l.de {
+    reverse_proxy localhost:3010
+}
+
+# Fallback für localhost-Zugriff
+localhost:80 {
+    redir / /3000
+}
+
+- Domains:
+  - git.pp1l.de → Gitea (localhost:3000)
+  - ci.pp1l.de → Woodpecker Web (localhost:8000)
+  - rust.pp1l.de → Rust Service (localhost:3010)
+
+## Applikationen
+
+- Snake Game (`/root/snake-game`)
+  - Node.js App, Pipeline via `.woodpecker.yml`
+  - Remote:
+
+        origin	http://automation:changeme@localhost:3000/pp1l/snake-game-cicd.git (fetch)
+origin	http://automation:changeme@localhost:3000/pp1l/snake-game-cicd.git (push)
+
+- OS Upgrade Automation (`/root/os-upgrade-automation`)
+  - Ansible Projekt, CI konfiguriert
+  - Remote:
+
+        origin	http://automation:changeme@localhost:3000/pp1l/os-upgrade-automation.git (fetch)
+origin	http://automation:changeme@localhost:3000/pp1l/os-upgrade-automation.git (push)
+
+- Rust Service (`/root/rust-server`)
+  - Containerfile, exposed über Caddy `rust.pp1l.de`
+  - Inhalte (Top-Level):
+ - Cargo.toml
+ - Containerfile
+ - src
+
+## CI/CD
+- Gitea: Host-Networking, Volume `gitea-data`
+- Woodpecker Server/Agent: Host-Networking, Volume `woodpecker-server-data`
+- Konfiguration:
+  - Server Env: `/etc/woodpecker/server.env` (OAuth-Client/Secret nicht veröffentlichen)
+  - Agent Env: `/etc/woodpecker/agent.env`
+- Wrapper-Skript: `/root/cicd-wrapper.sh`
+  - Befehle: start|stop|restart|status|logs|enable|disable|monitoring {start|stop|status|logs|urls}
+
+## Monitoring
+- Verzeichnis: `/root/monitoring`
+- Startskript: `start-monitoring-podman.sh`
+- Standard-Ports: Prometheus 9090, Grafana 3002, cAdvisor 8081, Node Exporter 9100, Alertmanager 9093
+
+## Sicherheit & Secrets
+- Secrets: `/root/secrets`, Woodpecker Envs in `/etc/woodpecker` (restriktive Rechte)
+- Git-Creds lokal in `~/.git-credentials`
+
+## Betrieb
+- CI/CD: `/root/cicd-wrapper.sh status`, `/root/cicd-wrapper.sh restart`
+- Monitoring: `/root/cicd-wrapper.sh monitoring start`, `/root/cicd-wrapper.sh monitoring status`
+
+## Hinweise
+- Host-Networking bewusst genutzt; persistente Volumes: gitea-data, woodpecker-server-data
+- Standard-Passwörter ändern; Secrets mit sops/age oder Vault verwalten
+