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System for Automated Server Administration
Pavelka, Martin ; Pánek, Richard (referee) ; Krčma, Martin (advisor)
The goal of this diploma thesis is to design the user interface and implement the information system as a web application. Using the custom implemented library the system communicates with GraphQL server which manages the client data. The thesis describes possible solutions for physical servers automatization. The application provides the application interface to manage virtual servers. Automatization is possible without human interaction. Connection to the virtualization technologies is handled by web interface APIs or custom scripts running in the virtual system terminal. There is a monitoring system built over project components. The thesis also describes the continuous integration using Gitlab tools. Running the configuration task is solved using the Unix CRON system.
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Smart Home: Digital Thermostatic Valve Controlled via WiFi
Smejkal, Jan ; Kapinus, Michal (referee) ; Materna, Zdeněk (advisor)
This bachelor thesis deals with smart home heating in households with radiators. The goal is to design a cheap digital heating head and to integrate it via WiFi and MQTT into the Home Assistant system. I have focused on keeping good design, head functions and a good user experience. Home Assistant enables showing graphs using InfluxDB and Grafana. Using a program in tool Node-RED enables it to lower heating temperature at the times of user absence and to schedule heating temperatures. The price of the complete unit is under 400 CZK. Temperature regulation was provided by a prediction controller, but it was replaced by a PID controller. The controller can regulate with the difference of maximal and minimal temperature of around 2 C. The user can control the boost mode of the head via a physical button or using the Home Assistant system. The resulting product is a good basis for a low-cost smart heating system.
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Systém pre zber a vizualizáciu údajov zo zariadení sieťovej infraštruktúry
Siroťák, Ondrej
This bachelor thesis focuses on the design and implementation of a system for collecting, storing and visualizing data from network devices at Mendel University in Brno. The introductory part deals with the issue of monitoring network devices. In the next part of the thesis, available monitoring systems are analyzed, which serve as a basis for the design of the proposed solution. At the end of the thesis, the implementation and testing of the proposed system is demonstrated.
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Mobile Application for Exporting Android Device Metrics into a Prometheus Database
Ptáček, Martin ; Burget, Radek (referee) ; Rychlý, Marek (advisor)
Tato práce se zabývá rozšířením ekosystému databáze časových řad Prometheus, aby bylo možné monitorovat také mobilní telefony s operačním systémem Android. Cílem této práce je implementovat Prometheus exportér pro Android. Výsledná implementace tohoto exportéru podporuje nejen zpřístupnění metrik pro databázi Prometheus, ale také ukládání metrik do paměti zařízení v případě nedostupnosti připojení a jejich následný dávkový export. Aplikace také obsahuje režim pro export metrik do databáze Prometheus přes NAT nebo podobnou síťovou bariéru. Aplikace exportuje přes 35 různých metrik z Android zařízení do databáze Prometheus. Čtenáři jsou předloženy výsledky testů týkající se energetické náročnosti implementace. Práce je publikována jako software s otevřeným zdrojovým kódem na platformě Github.
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Virtualized environment for testing the DDoS attacks
Král, Lukáš ; Safonov, Yehor (referee) ; Jurek, Michael (advisor)
The bachelor thesis focuses on the creation of a virtualized containerized environment for testing denial of service attacks. Theoretical part of the thesis analyses DDoS attacks, virtualization and Docker platform. In the practical part of the thesis, a web application is designed and implemented to test selected DDoS attacks. The impact of the attacks is then visualized using appropriate metrics through a monitoring system consisting of Prometheus and Grafana tools. Attackers, victim even monitoring components are generated using Docker containers.
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Predictive maintenance with wireless data transfer
Pernica, Michal ; Najman, Jan (referee) ; Dobossy, Barnabás (advisor)
This thesis deals with predictive maintenance and the use of NB-IoT network for its purpose. In the first part of the thesis, the wireless technologies for data transmission are presented, followed by a description of the different types of communication protocols, and lastly, the process of developing predictive maintenance is described. In the second part of the thesis, a server application for predictive maintenance purposes is presented, system control using a microcontroller, the NB-IoT module SIM700E is introduced along with its specifications, connection to the NB-IoT network and implementation of the MQTT protocol. Also, the server software composed of the MQTT broker, Node-Red, Influx DB and Grafana is described. The third section describes the application of predictive maintenance on two devices, namely a thermal chamber and a pneustand. The function of these systems is described, followed by the modifications applied. Afterwards, the fault conditions we want to detect are mentioned and then classifiers are trained to determine the condition. Finally, the control of the systems is redesigned so that it can be done using a microcontroller. Finally, experiments are performed while operating the device and verifying the functionality of predictive maintenance to identify the condition.
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Environmental Sensor for succulent plants
Horčička, Vít ; Hammer, Miloš (referee) ; Šoustek, Petr (advisor)
The aim of this thesis is to perform a research in the field of environmental sensors for plants, to get acquainted with the Arduino platform and to create a custom sensor design for plant care. The proposed solution is capable of monitoring ambient air temperature and humidity, soil moisture and light intensity. The measured values, along with the battery voltage, are sent via Wi-Fi to the InfluxDB database to be displayed in the Grafana environment.
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Data processing from fibre optic temperature sensors
Carboch, David ; Tomašov, Adrián (referee) ; Dejdar, Petr (advisor)
The bachelor thesis is dealing with fiber optic sensor systems, their division and properties. Furthermore, the thesis discusses the possibilities of fiber optic measurements in the nuclear power environment. Then the thesis contains possible methods of temperature measurement and their comparison. The thesis deals with the design of the sensing probe. Through the probe, the mechanical resistance of the sensing fiber and the handling of the sensing fiber have been improved. Furthermore, the thesis deals with the creation of an interactive chart of the relative temperature of a nuclear reactor in real time. In the chart, the dependence of reactor temperature change on reactor power and air temperature change can be observed. The measured results can be exported from the chart.
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Návrh dílčí části systému pro monitoring bezpečnostních incidentů
Koch, Michael ; Neuwirth, Bernard (referee) ; Novák, Lukáš (advisor)
The thesis focuses on the implementation of a part of the information system for security incident analysis within PwC. The system serves to complement the current solution, which lags behind future and existing requirements. The first part describes the theoretical background to understand the concept of the thesis and the technologies used in the implementation of the system. The following section contains an analysis of the current state of the existing system. The principle on which it works and the shortcomings that caused the necessity to implement a new solution. The third chapter deals with the actual design and implementation of the new solution. In the last part of the thesis an economic evaluation of the costs and benefits of the solution is made.
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Quantum key distribution
Klíčník, Ondřej ; Burda, Karel (referee) ; Münster, Petr (advisor)
This thesis is indirectly related to the bachelor thesis Quantum key distribution over optical fiber infrastructure. Unlike the previous paper, the focus will be mainly on the practical application of the QKD (Quantum key distribution) system Clavis3. For this reason, physical phenomena related to practically used QKD protocols are briefly explained in the theoretical part. These are mostly based on phase coding. In particular, special attention is paid to the Coherent one-way protocol (COW) implemented in Clavis3 devices. This protocol is also compared with practical implementations of the BB84 protocol. Furthermore, the principles of other advanced QKD techniques are outlined and the phenomena in the optical fiber that may affect the quantum channel are discussed. A separate chapter is also devoted to standardization and topologies of QKD networks. Last but not least, the thesis addresses the topic of attacks against practical implementations of QKD protocols. In the practical part, measurements aimed at practical deployment of Clavis3 devices in a common communication network are performed. These include the possibility of combining a quantum channel into a single fiber together with classical channels using Wavelength-division multiplexing (WDM) and the analysis of the effect of Raman noise on the maximum communication distance. At the same time, the robustness of the system against polarization changes and fiber manipulation is verified. Finally, the performance of the system using three-state and four-state versions of the COW protocol is compared and the eavesdropping simulation module is tested.
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