gateway-hub.service

[Unit]
Description=Gateway Hub (tenant registry, mTLS CA, admin API)
After=network-online.target
Wants=network-online.target
StartLimitIntervalSec=120
StartLimitBurst=5

[Service]
Type=simple
User=gateway
Group=gateway
ExecStart=/usr/local/bin/gateway-hub --config=/etc/gateway/config.yaml
Restart=on-failure
RestartSec=5s
LimitNOFILE=65535
Environment=GOMEMLIMIT=1GiB

# Directories — systemd creates/cleans these automatically.
RuntimeDirectory=gateway
RuntimeDirectoryMode=0750
StateDirectory=gateway gateway/hub gateway/tor
StateDirectoryMode=0700
LogsDirectory=gateway
LogsDirectoryMode=0750

# --- Sandboxing: minimum privilege. ---
ProtectSystem=strict
ProtectHome=yes
PrivateTmp=yes
PrivateDevices=yes
ProtectKernelTunables=yes
ProtectKernelModules=yes
ProtectControlGroups=yes
ProtectClock=yes
ProtectHostname=yes
ProtectKernelLogs=yes
RestrictAddressFamilies=AF_UNIX AF_INET AF_INET6 AF_NETLINK
RestrictNamespaces=yes
RestrictRealtime=yes
RestrictSUIDSGID=yes
LockPersonality=yes
MemoryDenyWriteExecute=yes
SystemCallArchitectures=native
SystemCallFilter=@system-service
SystemCallFilter=~@privileged @resources

NoNewPrivileges=yes
CapabilityBoundingSet=
AmbientCapabilities=

ReadWritePaths=/var/lib/gateway /var/log/gateway /run/gateway

[Install]
WantedBy=multi-user.target