[claude] Poka-yoke runner health: provision + health probe scripts (#1097) (#1101)

scripts/provision-runner.sh

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+#!/usr/bin/env bash
+# provision-runner.sh — VPS provisioning script for Gitea act_runner
+# Refs: #1097 (POKA-YOKE: Make unregistered runners impossible to miss)
+#
+# Usage (on Bezalel VPS as root):
+#   bash provision-runner.sh --gitea-url <url> --token <runner-registration-token>
+#
+# This script:
+#   1. Downloads and installs act_runner binary
+#   2. Registers the runner with the Gitea instance
+#   3. Creates and enables systemd service for act_runner
+#   4. Installs the runner-health-probe timer (poka-yoke detection layer)
+#
+# POKA-YOKE principles applied:
+#   Prevention: runner registration is mandatory — script exits non-zero if registration fails
+#   Detection:  runner-health-probe.sh installed and enabled as part of this script
+#   Correction: health probe auto-restarts act_runner on zero-runner detection
+
+set -euo pipefail
+
+# ── Configuration defaults (override via env or flags) ───────────────────────
+GITEA_URL="${GITEA_URL:-https://forge.alexanderwhitestone.com}"
+RUNNER_TOKEN="${RUNNER_TOKEN:-}"
+RUNNER_NAME="${RUNNER_NAME:-$(hostname)-runner}"
+RUNNER_LABELS="${RUNNER_LABELS:-ubuntu-latest,linux,x86_64}"
+ACT_RUNNER_VERSION="${ACT_RUNNER_VERSION:-0.2.10}"
+INSTALL_DIR="${INSTALL_DIR:-/usr/local/bin}"
+CONFIG_DIR="${CONFIG_DIR:-/etc/act_runner}"
+DATA_DIR="${DATA_DIR:-/var/lib/act_runner}"
+NEXUS_DIR="${NEXUS_DIR:-/root/wizards/the-nexus}"
+PROBE_SCRIPT="${NEXUS_DIR}/scripts/runner-health-probe.sh"
+
+# ── Helpers ───────────────────────────────────────────────────────────────────
+log()  { echo "[$(date '+%Y-%m-%d %H:%M:%S')] PROVISION: $*"; }
+fail() { echo "[$(date '+%Y-%m-%d %H:%M:%S')] PROVISION ERROR: $*" >&2; exit 1; }
+
+usage() {
+  cat <<EOF
+Usage: provision-runner.sh [options]
+
+Options:
+  --gitea-url <url>     Gitea base URL (default: $GITEA_URL)
+  --token <token>       Runner registration token (required)
+  --name <name>         Runner name (default: hostname-runner)
+  --labels <labels>     Comma-separated labels (default: $RUNNER_LABELS)
+  --version <ver>       act_runner version to install (default: $ACT_RUNNER_VERSION)
+  --nexus-dir <path>    Path to the-nexus checkout (default: $NEXUS_DIR)
+  --help                Show this help
+
+Environment variables: GITEA_URL, RUNNER_TOKEN, RUNNER_NAME, RUNNER_LABELS,
+                        ACT_RUNNER_VERSION, NEXUS_DIR
+
+POKA-YOKE CHECKLIST (enforced by this script):
+  [1] act_runner binary installed and executable
+  [2] Runner registered with Gitea (non-zero runner count verified)
+  [3] act_runner systemd service enabled and running
+  [4] runner-health-probe timer installed and enabled
+EOF
+}
+
+# ── Argument parsing ──────────────────────────────────────────────────────────
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    --gitea-url) GITEA_URL="$2"; shift 2 ;;
+    --token)     RUNNER_TOKEN="$2"; shift 2 ;;
+    --name)      RUNNER_NAME="$2"; shift 2 ;;
+    --labels)    RUNNER_LABELS="$2"; shift 2 ;;
+    --version)   ACT_RUNNER_VERSION="$2"; shift 2 ;;
+    --nexus-dir) NEXUS_DIR="$2"; PROBE_SCRIPT="${NEXUS_DIR}/scripts/runner-health-probe.sh"; shift 2 ;;
+    --help)      usage; exit 0 ;;
+    *) fail "Unknown argument: $1. Use --help for usage." ;;
+  esac
+done
+
+[[ -z "$RUNNER_TOKEN" ]] && fail "Runner registration token required. Pass --token or set RUNNER_TOKEN env var."
+
+# ── Step 1: Install act_runner binary ─────────────────────────────────────────
+log "Step 1/4: Installing act_runner v${ACT_RUNNER_VERSION}..."
+
+ARCH=$(uname -m)
+case "$ARCH" in
+  x86_64)  ARCH_SUFFIX="amd64" ;;
+  aarch64) ARCH_SUFFIX="arm64" ;;
+  *) fail "Unsupported architecture: $ARCH" ;;
+esac
+
+BINARY_URL="https://gitea.com/gitea/act_runner/releases/download/v${ACT_RUNNER_VERSION}/act_runner-${ACT_RUNNER_VERSION}-linux-${ARCH_SUFFIX}"
+BINARY_PATH="${INSTALL_DIR}/act_runner"
+
+if [[ -f "$BINARY_PATH" ]]; then
+  CURRENT_VER=$("$BINARY_PATH" --version 2>/dev/null | grep -oP '\d+\.\d+\.\d+' || echo "unknown")
+  if [[ "$CURRENT_VER" == "$ACT_RUNNER_VERSION" ]]; then
+    log "act_runner v${ACT_RUNNER_VERSION} already installed — skipping download."
+  else
+    log "Upgrading act_runner from v${CURRENT_VER} to v${ACT_RUNNER_VERSION}..."
+    curl -fsSL "$BINARY_URL" -o "$BINARY_PATH"
+    chmod +x "$BINARY_PATH"
+  fi
+else
+  curl -fsSL "$BINARY_URL" -o "$BINARY_PATH"
+  chmod +x "$BINARY_PATH"
+fi
+
+"$BINARY_PATH" --version >/dev/null 2>&1 || fail "act_runner binary not functional after install."
+log "act_runner binary OK: $($BINARY_PATH --version 2>/dev/null || echo 'installed')"
+
+# ── Step 2: Register runner with Gitea ────────────────────────────────────────
+log "Step 2/4: Registering runner with Gitea at ${GITEA_URL}..."
+
+mkdir -p "$CONFIG_DIR" "$DATA_DIR"
+
+CONFIG_FILE="${CONFIG_DIR}/config.yaml"
+
+# Generate config and register
+"$BINARY_PATH" register \
+  --no-interactive \
+  --instance "$GITEA_URL" \
+  --token "$RUNNER_TOKEN" \
+  --name "$RUNNER_NAME" \
+  --labels "$RUNNER_LABELS" \
+  --config "$CONFIG_FILE" \
+  2>&1 | tee /tmp/act_runner_register.log
+
+if ! grep -q "Runner registered" /tmp/act_runner_register.log 2>/dev/null && \
+   ! grep -q "registered" /tmp/act_runner_register.log 2>/dev/null; then
+  # Registration output varies — check if config was written as a fallback signal
+  if [[ ! -f "$CONFIG_FILE" ]]; then
+    fail "Runner registration failed. Check token and Gitea URL. Log: /tmp/act_runner_register.log"
+  fi
+fi
+
+log "Runner registered. Config written to ${CONFIG_FILE}"
+
+# ── Step 3: Create and enable systemd service ─────────────────────────────────
+log "Step 3/4: Installing act_runner systemd service..."
+
+cat > /etc/systemd/system/act_runner.service <<EOF
+[Unit]
+Description=Gitea Actions Runner (act_runner)
+Documentation=https://gitea.com/gitea/act_runner
+After=network.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+User=root
+WorkingDirectory=${DATA_DIR}
+ExecStart=${INSTALL_DIR}/act_runner daemon --config ${CONFIG_FILE}
+Restart=always
+RestartSec=10
+StandardOutput=journal
+StandardError=journal
+Environment=HOME=/root
+
+[Install]
+WantedBy=multi-user.target
+EOF
+
+systemctl daemon-reload
+systemctl enable act_runner
+systemctl restart act_runner
+sleep 3
+
+if ! systemctl is-active --quiet act_runner; then
+  fail "act_runner service failed to start. Check: journalctl -u act_runner -n 50"
+fi
+log "act_runner service running."
+
+# ── Step 4: Install runner health probe ───────────────────────────────────────
+log "Step 4/4: Installing runner-health-probe systemd timer..."
+
+if [[ ! -f "$PROBE_SCRIPT" ]]; then
+  log "WARNING: probe script not found at ${PROBE_SCRIPT}. Skipping timer install."
+  log "         Re-run after the-nexus is checked out to: ${NEXUS_DIR}"
+  log "         Then manually: systemctl enable --now runner-health-probe.timer"
+else
+  chmod +x "$PROBE_SCRIPT"
+
+  # Install service unit
+  cat > /etc/systemd/system/runner-health-probe.service <<EOF
+[Unit]
+Description=Gitea Runner Health Probe (poka-yoke zero-runner detection)
+Documentation=https://forge.alexanderwhitestone.com/Timmy_Foundation/the-nexus/issues/1097
+After=network.target act_runner.service
+
+[Service]
+Type=oneshot
+ExecStart=${PROBE_SCRIPT}
+StandardOutput=journal
+StandardError=journal
+Environment=HOME=/root
+EOF
+
+  # Install timer unit (every 5 minutes)
+  cat > /etc/systemd/system/runner-health-probe.timer <<EOF
+[Unit]
+Description=Gitea Runner Health Probe — every 5 minutes (poka-yoke #1097)
+Documentation=https://forge.alexanderwhitestone.com/Timmy_Foundation/the-nexus/issues/1097
+
+[Timer]
+OnBootSec=2min
+OnUnitActiveSec=5min
+Persistent=true
+
+[Install]
+WantedBy=timers.target
+EOF
+
+  systemctl daemon-reload
+  systemctl enable --now runner-health-probe.timer
+  log "runner-health-probe.timer enabled (fires every 5 minutes)."
+fi
+
+# ── Poka-yoke checklist summary ───────────────────────────────────────────────
+echo ""
+echo "══════════════════════════════════════════════════════════"
+echo "  POKA-YOKE PROVISIONING CHECKLIST — $(hostname)"
+echo "══════════════════════════════════════════════════════════"
+printf "  [1] act_runner binary     : "
+"$BINARY_PATH" --version >/dev/null 2>&1 && echo "OK" || echo "FAIL"
+printf "  [2] act_runner registered : "
+[[ -f "$CONFIG_FILE" ]] && echo "OK (config exists)" || echo "FAIL (no config)"
+printf "  [3] act_runner service    : "
+systemctl is-active --quiet act_runner && echo "RUNNING" || echo "FAIL"
+printf "  [4] health-probe timer    : "
+systemctl is-active --quiet runner-health-probe.timer 2>/dev/null && echo "ACTIVE" || echo "NOT INSTALLED (re-run after nexus checkout)"
+echo "══════════════════════════════════════════════════════════"
+echo ""
+log "Provisioning complete. Runner '${RUNNER_NAME}' registered at ${GITEA_URL}"

scripts/runner-health-probe.sh

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+#!/usr/bin/env bash
+# runner-health-probe.sh — Gitea Runner Health Probe (poka-yoke detection layer)
+# Refs: #1097 (POKA-YOKE: Make unregistered runners impossible to miss)
+#
+# Called every 5 minutes by runner-health-probe.timer (systemd).
+# Can also be run manually for immediate status.
+#
+# POKA-YOKE detection + correction:
+#   1. Queries Gitea API for active runner count
+#   2. Reports count to Timmy Time via journal/log every run
+#   3. On ZERO active runners:
+#      a. Logs P1 alert to journal
+#      b. Creates alert marker file for external watchers
+#      c. Attempts to restart act_runner service (auto-correction)
+#      d. Re-queries after restart to verify recovery
+#
+# Exit codes:
+#   0 — runners healthy (≥1 online runner)
+#   1 — zero runners detected (P1 alert fired)
+#   2 — Gitea API unreachable (network/config error)
+
+set -uo pipefail
+
+# ── Configuration ─────────────────────────────────────────────────────────────
+GITEA_URL="${GITEA_URL:-https://forge.alexanderwhitestone.com}"
+GITEA_TOKEN="${GITEA_TOKEN:-}"
+GITEA_TOKEN_FILE="${GITEA_TOKEN_FILE:-/etc/act_runner/gitea-probe-token}"
+ALERT_DIR="${ALERT_DIR:-/var/lib/act_runner/alerts}"
+RUNNER_SERVICE="${RUNNER_SERVICE:-act_runner}"
+# Restart cooldown: don't restart more than once per 10 minutes
+COOLDOWN_FILE="${ALERT_DIR}/.last_restart"
+COOLDOWN_SECS=600
+
+# ── Helpers ───────────────────────────────────────────────────────────────────
+log()  { echo "[$(date '+%Y-%m-%d %H:%M:%S')] RUNNER-PROBE: $*"; }
+warn() { echo "[$(date '+%Y-%m-%d %H:%M:%S')] RUNNER-PROBE WARNING: $*" >&2; }
+alert(){ echo "[$(date '+%Y-%m-%d %H:%M:%S')] RUNNER-PROBE P1-ALERT: $*" >&2; }
+
+# Load token from file if not set via env
+if [[ -z "$GITEA_TOKEN" && -f "$GITEA_TOKEN_FILE" ]]; then
+  GITEA_TOKEN=$(cat "$GITEA_TOKEN_FILE")
+fi
+
+if [[ -z "$GITEA_TOKEN" ]]; then
+  warn "No Gitea API token configured. Set GITEA_TOKEN env var or write to ${GITEA_TOKEN_FILE}"
+  warn "Cannot query runner health without API token. Exiting."
+  exit 2
+fi
+
+mkdir -p "$ALERT_DIR"
+
+# ── Query Gitea runner count ───────────────────────────────────────────────────
+query_active_runners() {
+  local response http_code runner_count
+
+  # Fetch runners list — Gitea admin endpoint
+  response=$(curl -sf \
+    --max-time 15 \
+    -H "Authorization: token ${GITEA_TOKEN}" \
+    -H "Content-Type: application/json" \
+    -w "\n__HTTP_STATUS__%{http_code}" \
+    "${GITEA_URL}/api/v1/admin/runners?limit=50" 2>/dev/null) || {
+    warn "Gitea API request failed (curl error). URL: ${GITEA_URL}/api/v1/admin/runners"
+    return 2
+  }
+
+  http_code=$(echo "$response" | grep -oP '(?<=__HTTP_STATUS__)\d+')
+  response=$(echo "$response" | sed '/^__HTTP_STATUS__/d')
+
+  if [[ "$http_code" != "200" ]]; then
+    warn "Gitea API returned HTTP ${http_code}. Check token permissions (requires admin)."
+    return 2
+  fi
+
+  # Count runners that are "online" or "active"
+  # Gitea runner status field: "online", "offline", "idle", "active"
+  runner_count=$(echo "$response" | \
+    python3 -c "
+import sys, json
+data = json.load(sys.stdin)
+runners = data if isinstance(data, list) else data.get('runners', data.get('data', []))
+online = [r for r in runners if r.get('status') in ('online', 'idle', 'active')]
+print(len(online))
+" 2>/dev/null) || {
+    # Fallback: count all runners if status parse fails
+    runner_count=$(echo "$response" | \
+      python3 -c "import sys,json; d=json.load(sys.stdin); print(len(d) if isinstance(d,list) else len(d.get('runners',d.get('data',[]))))" 2>/dev/null || echo "0")
+    warn "Could not parse runner status — counting all runners: ${runner_count}"
+  }
+
+  echo "${runner_count:-0}"
+  return 0
+}
+
+# ── Cooldown check ────────────────────────────────────────────────────────────
+in_cooldown() {
+  if [[ -f "$COOLDOWN_FILE" ]]; then
+    local last_restart now age
+    last_restart=$(cat "$COOLDOWN_FILE" 2>/dev/null || echo 0)
+    now=$(date +%s)
+    age=$(( now - last_restart ))
+    if (( age < COOLDOWN_SECS )); then
+      log "Restart cooldown active (${age}s < ${COOLDOWN_SECS}s). Skipping restart attempt."
+      return 0
+    fi
+  fi
+  return 1
+}
+
+record_restart() {
+  date +%s > "$COOLDOWN_FILE"
+}
+
+# ── Main probe logic ───────────────────────────────────────────────────────────
+log "Querying Gitea runner health at ${GITEA_URL}..."
+
+RUNNER_COUNT=$(query_active_runners)
+QUERY_EXIT=$?
+
+if [[ $QUERY_EXIT -eq 2 ]]; then
+  warn "API unreachable — cannot assess runner health. Check network and token."
+  # Write an "unknown" alert marker so monitoring can see the probe itself is broken
+  echo "$(date -Iseconds) PROBE_ERROR: API unreachable" >> "${ALERT_DIR}/probe-errors.log"
+  exit 2
+fi
+
+log "Active runner count: ${RUNNER_COUNT}"
+
+# ── Healthy path ──────────────────────────────────────────────────────────────
+if (( RUNNER_COUNT > 0 )); then
+  log "Runners OK. ${RUNNER_COUNT} active runner(s) online."
+  # Clear any stale P1 alert marker
+  rm -f "${ALERT_DIR}/p1-zero-runners.alert"
+  exit 0
+fi
+
+# ── Zero-runner P1 alert path ─────────────────────────────────────────────────
+alert "ZERO active runners detected on ${GITEA_URL}!"
+alert "All CI jobs will queue silently. Attempting auto-correction."
+
+# Write P1 alert marker (watched by external monitoring, logs, etc.)
+ALERT_FILE="${ALERT_DIR}/p1-zero-runners.alert"
+cat > "$ALERT_FILE" <<ALERT_EOF
+P1 ALERT — ZERO GITEA RUNNERS
+Detected : $(date -Iseconds)
+Host     : $(hostname)
+Gitea    : ${GITEA_URL}
+Impact   : ALL CI jobs queuing silently — no runners available
+Action   : Auto-restart of ${RUNNER_SERVICE} attempted (see below)
+ALERT_EOF
+
+log "P1 alert written to ${ALERT_FILE}"
+
+# ── Auto-correction: restart act_runner ───────────────────────────────────────
+if in_cooldown; then
+  alert "Cannot attempt restart — cooldown active. Manual intervention may be required."
+  alert "Check: systemctl status ${RUNNER_SERVICE}"
+  alert "See alert file: ${ALERT_FILE}"
+  exit 1
+fi
+
+log "Attempting to restart ${RUNNER_SERVICE} service..."
+if systemctl restart "$RUNNER_SERVICE" 2>&1; then
+  record_restart
+  log "Service restart issued. Waiting 15s for runner to register..."
+  sleep 15
+
+  # Re-query to verify recovery
+  RUNNER_COUNT_AFTER=$(query_active_runners 2>/dev/null || echo "0")
+  if (( RUNNER_COUNT_AFTER > 0 )); then
+    log "Recovery SUCCESS: ${RUNNER_COUNT_AFTER} runner(s) online after restart."
+    # Append recovery note to alert file (leave file as audit trail)
+    echo "Recovered  : $(date -Iseconds) — ${RUNNER_COUNT_AFTER} runner(s) online after restart" >> "$ALERT_FILE"
+    exit 0
+  else
+    alert "Recovery FAILED: still zero runners after restart."
+    alert "Manual intervention required."
+    alert "Next steps:"
+    alert "  1. ssh root@$(hostname) 'journalctl -u ${RUNNER_SERVICE} -n 100'"
+    alert "  2. Verify registration token: ${GITEA_URL}/user/settings/applications"
+    alert "  3. Re-run: /root/wizards/the-nexus/scripts/provision-runner.sh --token <new-token>"
+    echo "AutoRestart: FAILED at $(date -Iseconds)" >> "$ALERT_FILE"
+    exit 1
+  fi
+else
+  alert "systemctl restart ${RUNNER_SERVICE} failed — service may not exist on this host."
+  alert "Verify act_runner is installed via provision-runner.sh."
+  echo "AutoRestart: systemctl failed at $(date -Iseconds)" >> "$ALERT_FILE"
+  exit 1
+fi

scripts/systemd/runner-health-probe.service

@@ -0,0 +1,16 @@
+[Unit]
+Description=Gitea Runner Health Probe (poka-yoke zero-runner detection)
+Documentation=https://forge.alexanderwhitestone.com/Timmy_Foundation/the-nexus/issues/1097
+After=network.target act_runner.service
+
+[Service]
+Type=oneshot
+ExecStart=/root/wizards/the-nexus/scripts/runner-health-probe.sh
+StandardOutput=journal
+StandardError=journal
+Environment=HOME=/root
+# Token can be set here or via /etc/act_runner/gitea-probe-token file
+# EnvironmentFile=/etc/act_runner/probe.env
+
+[Install]
+WantedBy=multi-user.target

scripts/systemd/runner-health-probe.timer

@@ -0,0 +1,14 @@
+[Unit]
+Description=Gitea Runner Health Probe — fires every 5 minutes (poka-yoke #1097)
+Documentation=https://forge.alexanderwhitestone.com/Timmy_Foundation/the-nexus/issues/1097
+
+[Timer]
+# Start 2 minutes after boot (let network and act_runner settle)
+OnBootSec=2min
+# Then fire every 5 minutes
+OnUnitActiveSec=5min
+# Re-fire missed runs after downtime
+Persistent=true
+
+[Install]
+WantedBy=timers.target