[Unit]
Description=MCNS Database Backup

[Service]
Type=oneshot
User=mcns
Group=mcns
ExecStart=/usr/local/bin/mcns snapshot --config /srv/mcns/mcns.toml
ExecStartPost=/usr/bin/find /srv/mcns/backups -name 'mcns-*.db' -mtime +30 -delete

# Security hardening
NoNewPrivileges=true
ProtectSystem=strict
ProtectHome=true
PrivateTmp=true
PrivateDevices=true
ProtectKernelTunables=true
ProtectKernelModules=true
ProtectControlGroups=true
RestrictSUIDSGID=true
RestrictNamespaces=true
LockPersonality=true
MemoryDenyWriteExecute=true
RestrictRealtime=true
ReadWritePaths=/srv/mcns