funman300
8ae432223a
Replaces the detached `setsid nohup … nsenter …` launch, which had no restart policy, no boot persistence and no supervisor-visible logs. Staging units are installed and proven; production units are TEMPLATES and are not installed. Three decisions, each measured rather than assumed: * `Wants=`, not `Requires=`, from host to Core. With `Requires`, stopping Core stopped the host AND a later Core start did not bring it back -- a routine Core restart would leave the client with no server. With `Wants` the host survives a Core outage, answers 503 core_unavailable, never falls back to Python, and resumes the moment Core returns with no intervention. Both halves tested. * Readiness is a bounded ExecStartPre TCP gate, because ordering proves nothing about readiness and Type=exec only proves the binary exec'd. Core binds its listener after migrations and content load, so "port open" is a real signal. The gate FAILS rather than blocking: a host that waits forever looks healthy while serving nobody. * The netns is resolved by container NAME every start. The container is restart=unless-stopped and its netns inode CHANGES on restart (measured: 4026539938 -> 4026540033), so a hardcoded pid is wrong by construction and anything left in the old namespace serves nobody. Proven equivalent to today's nsenter against a scratch container, never production's namespace. `systemd-analyze verify` caught two real defects before deployment: StartLimitIntervalSec/StartLimitBurst sat in [Service], where systemd 252 silently ignores them, so the crash-loop ceiling was not taking effect; and a Documentation URL containing %20 parsed as a specifier. Both fixed and the effective properties re-confirmed from the running units. Staging evidence: Core-first ordering, host refused when Core is absent or merely not listening, outage survival, automatic recovery, restart, graceful stop with no strays, boot simulated via multi-user.target, 3x SIGKILL contained at ~5s spacing, journald logs, and economy state byte-identical throughout (integrity ok, fk 0).
56 lines
2.0 KiB
Desktop File
56 lines
2.0 KiB
Desktop File
[Unit]
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Description=OpenFUT FIFA17 UTAS host (PRODUCTION) — client-facing, Core-dependent
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Documentation=file:///home/alex/OpenFUT/scripts/systemd/README.md
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# PRODUCTION TEMPLATE — NOT INSTALLED.
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Requires=openfut-netns.service
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After=openfut-netns.service
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Wants=openfut-core.service
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After=openfut-core.service
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# `Wants` on Core, deliberately NOT `Requires`/`BindsTo`/`PartOf` — measured on
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# staging: those propagate a Core stop into a host stop, and a later Core start
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# does NOT bring the host back, so a routine Core restart would leave the client
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# with no server at all. With `Wants` the host survives a Core outage, answers
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# 503 `core_unavailable` (never a Python fallback), and resumes serving the
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# moment Core returns with no supervisor intervention. Both halves were proven
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# on the staging units.
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#
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# `Requires` on the netns unit IS correct: without the namespace the host would
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# bind the wrong network entirely.
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# StartLimit* MUST live in [Unit]: systemd 252 silently IGNORES them in
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# [Service] (`systemd-analyze verify` flags it), which would have left the
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# crash-loop ceiling at the 10s/5 default instead of the intended 60s window.
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StartLimitIntervalSec=60
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StartLimitBurst=5
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[Service]
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Type=exec
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User=root
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NetworkNamespacePath=/run/netns/openfut
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EnvironmentFile=/etc/openfut/host.env
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# Admission gate. Ordering alone proves nothing about readiness (Type=exec only
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# proves the binary exec'd). Core binds its port only after migrations and the
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# content pack have loaded, so "port open" is a real readiness signal here.
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# Bounded and FAILING rather than blocking: a host that waits forever looks
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# healthy to the supervisor while serving nobody.
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ExecStartPre=/home/alex/OpenFUT/scripts/systemd/openfut-wait-tcp.sh 127.0.0.1 18080 30
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ExecStart=/home/alex/openfut-migration/promote-contract-20260822-184409/artifacts/openfut-utas-host
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KillSignal=SIGTERM
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KillMode=mixed
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TimeoutStopSec=30
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Restart=on-failure
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RestartSec=5s
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StandardOutput=journal
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StandardError=journal
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SyslogIdentifier=openfut-host
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[Install]
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WantedBy=multi-user.target
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