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input {
  file {
    path => "/var/log/nginx/access.log"
    type => "nginx"
  }
}

output {
  elasticsearch {
    hosts => ["localhost:9200"]
    index => "nginx-access-%{+YYYY.MM.dd}"
  }
}

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{
  "trigger": {
    "schedule": {
      "interval": "10s"
    }
  },
  "input": {
    "search": {
      "request": {
        "indices": ["nginx-access-*"],
        "body": {
          "query": {
            "match": {
              "response": "500"
            }
          }
        }
      }
    }
  },
  "actions": {
    "send_email": {
      "email": {
        "to": "admin@example.com",
        "subject": "Error alert",
        "body": "An error occurred. Please check the server logs."
      }
    }
  }
}

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