deploy: persistent systemd unit running a pinned release binary with Restart=on-failure + boot enable, plus a liveness timer that restarts the daemon if a register round-trip stops answering

deploy/echoircd-dev.service

@@ -0,0 +1,19 @@
+[Unit]
+Description=echoIRCd (production) — native Rust ircd
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+User=debian
+WorkingDirectory=/home/debian/irc/ircd/echoIRCd
+LimitNOFILE=200000
+# runs a PINNED release binary (bin/echoircd), not target/debug — so a stray
+# `cargo build` never changes what a restart would launch. Deploy = copy a fresh
+# `cargo build --release` binary over bin/echoircd, then `systemctl restart`.
+ExecStart=/home/debian/irc/ircd/echoIRCd/bin/echoircd /home/debian/irc/ircd/echoIRCd/echoircd.conf
+Restart=on-failure
+RestartSec=2
+
+[Install]
+WantedBy=multi-user.target

deploy/echoircd-liveness.service

@@ -0,0 +1,8 @@
+[Unit]
+Description=echoIRCd liveness probe — restart the daemon if it stops responding
+
+[Service]
+Type=oneshot
+# a hung (but not exited) daemon isn't caught by Restart=on-failure; this probe
+# does a real register round-trip and restarts the service if it doesn't answer.
+ExecStart=/home/debian/irc/ircd/echoIRCd/scripts/liveness.sh 6767

deploy/echoircd-liveness.timer

@@ -0,0 +1,10 @@
+[Unit]
+Description=Run the echoIRCd liveness probe periodically
+
+[Timer]
+OnBootSec=2min
+OnUnitActiveSec=2min
+AccuracySec=15s
+
+[Install]
+WantedBy=timers.target