anti
f5a5fec607
Add deploy/ unit files for every DECNET daemon (agent, updater, api, web, swarmctl, listener, forwarder). All run as User=decnet with NoNewPrivileges, ProtectSystem, PrivateTmp, LockPersonality; AmbientCapabilities=CAP_NET_ADMIN CAP_NET_RAW only on the agent (MACVLAN/scapy). Existing api/web units migrated to /opt/decnet layout and the same hardening stanza. Make the updater's _spawn_agent systemd-aware: under systemd (detected via INVOCATION_ID + systemctl on PATH), `systemctl restart decnet-agent.service` replaces the Popen path so the new agent inherits the unit's ambient caps instead of the updater's empty set. _stop_agent becomes a no-op in that mode to avoid racing systemctl's own stop phase. Tests cover the dispatcher branch selection, MainPID parsing, and the systemd no-op stop.
50 lines
1.6 KiB
Desktop File
50 lines
1.6 KiB
Desktop File
[Unit]
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Description=DECNET Self-Updater (mTLS)
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Documentation=https://github.com/4nt11/DECNET/wiki/Remote-Updates
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After=network-online.target
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Wants=network-online.target
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# Deliberately NOT After=decnet-agent.service — the updater must come up even
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# when the agent is broken, since that is exactly when it is most useful.
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[Service]
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Type=simple
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User=decnet
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Group=decnet
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WorkingDirectory=/opt/decnet
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EnvironmentFile=-/opt/decnet/.env.local
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ExecStart=/opt/decnet/venv/bin/decnet updater \
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--host 0.0.0.0 --port 8766 \
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--updater-dir /etc/decnet/updater \
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--install-dir /opt/decnet \
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--agent-dir /etc/decnet/agent
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# The updater SIGTERMs the agent and spawns a new one. Same User=decnet means
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# signalling is allowed without CAP_KILL. It does not need NET_ADMIN/NET_RAW
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# itself — the new agent process picks those up from decnet-agent.service when
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# systemd restarts it (or from the agent's own unit's AmbientCapabilities when
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# spawned by the updater as a direct child).
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CapabilityBoundingSet=
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AmbientCapabilities=
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# Security Hardening
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NoNewPrivileges=yes
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ProtectSystem=full
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ProtectHome=read-only
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PrivateTmp=yes
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ProtectKernelTunables=yes
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ProtectKernelModules=yes
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ProtectControlGroups=yes
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RestrictSUIDSGID=yes
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LockPersonality=yes
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# Writes release slots, pip installs into venv, manages agent.pid.
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ReadWritePaths=/opt/decnet /var/log/decnet
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Restart=on-failure
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RestartSec=5
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# Self-update replaces the process image via os.execv; the new binary answers
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# /health within 30 s. Give it headroom before systemd's own termination.
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TimeoutStopSec=30
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[Install]
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WantedBy=multi-user.target
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