[Unit]
Description=VPS Control monitoring agent
Documentation=https://github.com/example/vps-control
After=network-online.target
Wants=network-online.target

[Service]
Type=simple
User=vps-agent
Group=vps-agent
ExecStart=/usr/local/bin/vps-agent --config /etc/vps-agent/config.toml
Restart=on-failure
RestartSec=5s
TimeoutStopSec=15s

# Resource controls
MemoryHigh=48M
MemoryMax=64M
CPUQuota=10%
TasksMax=64

# Filesystem and privilege hardening
NoNewPrivileges=true
PrivateTmp=true
PrivateDevices=true
ProtectHome=true
ProtectSystem=strict
ProtectKernelTunables=true
ProtectKernelModules=true
ProtectKernelLogs=true
ProtectControlGroups=true
ProtectClock=true
ProtectHostname=true
RestrictSUIDSGID=true
LockPersonality=true
RestrictRealtime=true
RestrictNamespaces=true
CapabilityBoundingSet=
AmbientCapabilities=
SystemCallArchitectures=native
UMask=0077

# Read-only host information and bounded address families.
ProcSubset=all
ProtectProc=invisible
RestrictAddressFamilies=AF_UNIX AF_INET AF_INET6 AF_NETLINK

[Install]
WantedBy=multi-user.target