anti
51012eaa67
The systemd unit templates hardcoded {{ install_dir }}/venv/bin/decnet.
On production hosts enroll_bootstrap.sh creates exactly that path so it
worked. On dev boxes where the operator runs `sudo decnet init` against
a source checkout with a differently-named venv (.venv, .311, .312),
every decnet-*.service looped forever in auto-restart with:
Failed at step EXEC spawning .../venv/bin/decnet: No such file or
directory
Templates now use {{ venv_dir }} as an independent Jinja2 var. `decnet
init` adds --venv-dir (explicit override), otherwise autodetects:
1. $VIRTUAL_ENV (only when inside --install-dir, so a user-home venv
never gets baked into a root-owned unit),
2. {install_dir}/venv (production default; what enroll_bootstrap
creates),
3. {install_dir}/{.venv,.311,.312,.313} (common dev conventions).
Init aborts before any file writes if nothing resolves — an
operator-friendly error beats journalctl spam on every unit restart.
python3-venv doesn't set a persistent system variable — $VIRTUAL_ENV
lives in the activated shell only — so this has to be decided + baked
in at init time; there's no way for systemd to "inherit the current
venv" at unit start.
Test mode (--prefix) skips venv validation so the existing test suite
doesn't need to stub up a venv tree per case.
50 lines
1.6 KiB
Django/Jinja
50 lines
1.6 KiB
Django/Jinja
[Unit]
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Description=DECNET Self-Updater (mTLS)
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Documentation=https://git.resacachile.cl/anti/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={{ install_dir }}
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EnvironmentFile=-{{ install_dir }}/.env.local
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ExecStart={{ venv_dir }}/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 {{ install_dir }} \
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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={{ install_dir }} /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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