fix: права доступа для zabbix-agent на файлы данных

- atomic_write: chmod 644 на файлы (было 600 от mkstemp)
- install.sh: chmod 755 на /var/lib/airflow-monitor
- problems.count: grep вместо python3 (не везде доступен)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

airflow_monitor/actions.py

@@ -53,6 +53,7 @@ class DataExporter:
             )
             with os.fdopen(fd, "w", encoding="utf-8") as f:
                 f.write(content)
+            os.chmod(tmp_path, 0o644)
             os.replace(tmp_path, str(path))
             logger.debug(
                 "File written: %s (%d bytes)",

build.sh

@@ -333,6 +333,8 @@ for dir in "$STATE_DIR" "$LOG_DIR"; do
     else
         echo "  Exists:  $dir"
     fi
+    # Ensure zabbix agent can read data files
+    sudo chmod 755 "$dir"
 done
 
 # --- Step 6: Install systemd service ---

zabbix/airflow-monitor.conf

@@ -17,7 +17,7 @@ UserParameter=airflow.dag.problems,cat /var/lib/airflow-monitor/problems.json 2>
 
 # Количество проблемных DAG-ов (для простых триггеров)
 # Zabbix item: type=Zabbix agent, key=airflow.dag.problems.count, type of info=Numeric (unsigned)
-UserParameter=airflow.dag.problems.count,python3 -c "import json,sys; print(len(json.load(open('/var/lib/airflow-monitor/problems.json'))))" 2>/dev/null || echo 0
+UserParameter=airflow.dag.problems.count,grep -o '"dag_id"' /var/lib/airflow-monitor/problems.json 2>/dev/null | wc -l
 
 # Heartbeat — epoch timestamp последнего успешного цикла
 # Zabbix item: type=Zabbix agent, key=airflow.monitor.heartbeat, type of info=Numeric (unsigned)