Cust1
Customer 1 runs a small web platform on a single host.
Host[edit]
- FQDN: cust1.gobyl.cc
- OS: Ubuntu 24.04
- Access: ssh as root, key in OpenBao at
secret/customers/cust1
Services[edit]
| Service | How it runs | Port | Notes |
|---|---|---|---|
| Website | nginx, static files in /var/www/html | 80 | Public marketing site |
| Application | systemd unit nodeapp, code in /opt/app |
3000 | Node.js, reads config from /opt/app/config.json, needs PostgreSQL |
| Database | PostgreSQL (distro package), data on / | 5432 (localhost) | Used by the application only |
Operational notes[edit]
- Restart services with
systemctl restart nginx|nodeapp|postgresql. - Application logs:
journalctl -u nodeapp. It exits nonzero if /opt/app/config.json is missing or the database is unreachable. - PostgreSQL config lives in /etc/postgresql/16/main/. The application expects the default port 5432.
- Disk pressure history: log growth under /var/log has filled the disk before. Safe to delete old files in /var/log/app-debug/.
- Monitoring: Icinga checks website, nodeapp, disk and postgres from the ops core host.
Escalation[edit]
Before changing anything, check the Maintenance calendar and open tickets for planned work. If the fix is not obvious or requires data-destructive steps, stop and hand over to the on-call engineer in the Incidents channel.