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Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/cron/install-explorer-cron.sh

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+#!/usr/bin/env bash
+# Install cron jobs in VMID 5000 to keep explorer API and nginx healthy and prevent disk full.
+# Run from repo root on Proxmox host that has VMID 5000, or with EXPLORER_VM_HOST=root@<node>.
+#
+# Cron installed inside the VM:
+#   - Every 5 min: health check + restart Blockscout/nginx if needed
+#   - Daily 03:15: safe disk prune (images + build cache only, no container prune)
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+REPO_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
+[ -f "$REPO_ROOT/../.env" ] && source "$REPO_ROOT/../.env" 2>/dev/null || true
+VMID="${EXPLORER_VMID:-5000}"
+EXPLORER_NODE="${EXPLORER_VM_HOST:-${PROXMOX_R630_02:-192.168.11.12}}"
+if [[ "$EXPLORER_NODE" == *"@"* ]]; then SSH_TARGET="$EXPLORER_NODE"; else SSH_TARGET="root@$EXPLORER_NODE"; fi
+
+# Remote mode
+if ! command -v pct &>/dev/null || ! pct list 2>/dev/null | grep -q "^$VMID "; then
+    if [ -n "${EXPLORER_VM_HOST:-}" ] || [ -n "${PROXMOX_R630_02:-}" ]; then
+        echo "Installing cron via SSH on $SSH_TARGET..."
+        scp -o StrictHostKeyChecking=no -o ConnectTimeout=10 "$SCRIPT_DIR/explorer-maintain.sh" "$SSH_TARGET:/tmp/explorer-maintain.sh" 2>/dev/null || true
+        scp -o StrictHostKeyChecking=no -o ConnectTimeout=10 "$SCRIPT_DIR/install-explorer-cron.sh" "$SSH_TARGET:/tmp/install-explorer-cron.sh" 2>/dev/null || true
+        ssh -o StrictHostKeyChecking=no -o ConnectTimeout=10 "$SSH_TARGET" "EXPLORER_VM_HOST= bash /tmp/install-explorer-cron.sh"
+        exit $?
+    else
+        echo "Run on Proxmox host that has VMID $VMID, or set EXPLORER_VM_HOST=root@<node-ip>"
+        exit 1
+    fi
+fi
+
+EXEC_PREFIX="pct exec $VMID --"
+MAINTAIN_SCRIPT="/usr/local/bin/explorer-maintain.sh"
+
+echo "=============================================="
+echo "Install explorer maintenance cron (VMID $VMID)"
+echo "=============================================="
+
+# Copy script into VM
+pct push $VMID "$SCRIPT_DIR/explorer-maintain.sh" "$MAINTAIN_SCRIPT"
+$EXEC_PREFIX chmod +x "$MAINTAIN_SCRIPT"
+echo "✅ Installed $MAINTAIN_SCRIPT"
+
+# Install crontab (append to existing)
+$EXEC_PREFIX bash -c '(crontab -l 2>/dev/null | grep -v explorer-maintain | grep -v /usr/local/bin/explorer-maintain.sh || true; echo "# explorer-maintain"; echo "*/5 * * * * /usr/local/bin/explorer-maintain.sh >> /var/log/explorer-maintain.log 2>&1"; echo "15 3 * * * RUN_PRUNE=1 /usr/local/bin/explorer-maintain.sh >> /var/log/explorer-maintain.log 2>&1") | crontab -'
+echo "✅ Cron installed:"
+$EXEC_PREFIX crontab -l 2>/dev/null | grep -E "explorer-maintain|explorer-maintain.sh" || true
+
+# Ensure log file exists and is writable
+$EXEC_PREFIX touch /var/log/explorer-maintain.log 2>/dev/null || true
+$EXEC_PREFIX chmod 644 /var/log/explorer-maintain.log 2>/dev/null || true
+
+echo ""
+echo "=============================================="
+echo "Done. Schedule:"
+echo "  - Every 5 min: health check + recover Blockscout/nginx"
+echo "  - Daily 03:15: safe disk prune (if usage >= 90%)"
+echo "  Log: pct exec $VMID -- tail -f /var/log/explorer-maintain.log"
+echo "=============================================="