• Proceedings of the Korean Society of Computer Information Conference
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• 2023.07a
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• pp.499-500
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• 2023

본 논문에서는 Docker를 활용하여 코드 테스트 API를 활용한 코딩 테스트 웹 사이트를 구현한 결과를 보인다. 코드 테스트에서 다양한 언어 지원을 위해 Dockerfile 템플릿을 개발하여 언어의 다양성을 확보하고 Docker를 이용하여 격리된 환경에서 코드를 실행하고 평가하여 안전하고 효율적으로 채점을 수행한다. Docker의 curl[1]를 이용해 실시간으로 서버와 통신을 통해 결과를 전송한다. 이를 통해 사용자는 작성한 코드에 대한 평가를 실시간으로 피드백 받을 수 있다.

• KIPS Transactions on Computer and Communication Systems
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• v.6 no.2
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• pp.75-86
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• 2017

Docker, which is one of the various virtualization technology in server systems, is getting popular as it provides more lightweight environment for service operation than existing virtualization technology. It supports easy way of establishment, update, and migration of server environment with the help of image and container concept. As the adoption of docker technology increases, the attack motive for the server for the distribution of docker images and the incident case of attacking docker-based hosts would also increase. Therefore, the method and procedure of digital forensic investigation of docker-based host including the way to extract the filesystem of containers when docker daemon is inactive are presented in this paper.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.15 no.3
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• pp.911-931
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• 2021

Recently, most cloud services use Docker container environment to provide their services. However, there are no researches to evaluate the performance of communication libraries for multi-GPU based distributed deep learning in a Docker container environment. In this paper, we propose an efficient communication architecture for multi-GPU based deep learning in a Docker container environment by evaluating the performances of various communication libraries. We compare the performances of the parameter server architecture and the All-reduce architecture, which are typical distributed deep learning architectures. Further, we analyze the performances of two separate multi-GPU resource allocation policies - allocating a single GPU to each Docker container and allocating multiple GPUs to each Docker container. We also experiment with the scalability of collective communication by increasing the number of GPUs from one to four. Through experiments, we compare OpenMPI and MPICH, which are representative open source MPI libraries, and NCCL, which is NVIDIA's collective communication library for the multi-GPU setting. In the parameter server architecture, we show that using CUDA-aware OpenMPI with multi-GPU per Docker container environment reduces communication latency by up to 75%. Also, we show that using NCCL in All-reduce architecture reduces communication latency by up to 93% compared to other libraries.

• Journal of the Korea Society of Computer and Information
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• v.25 no.11
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• pp.51-58
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• 2020

Most of the students in computer-related departments work on projects, and it is essential to use a database for project execution. To use such a database, it is necessary to install a Database Management System. However, it takes several minutes (hours) to install a DBMS, and some DBMS require a difficult installation process. Therefore, in order to solve this problem, this study proposed a system that can easily install DBMS using Docker. Docker is an open source project that automates the deployment of Linux applications into software containers. Docker Container is wrapped in a complete file system that includes everything necessary for the execution of software, and includes code, runtime, system tools, system libraries, and anything that is installed on the server. This guarantees that they will always run the same regardless of the environment in which they are running. After creating a database using this proposed system, you can check the database access information on the web and check the server status in minutes. As a result of of implementing this proposed system and applying it to the projects of 10 teams, the installation time was reduced by 94.5% for Maria DBMS and 98.3% for Oracle DBMS than individual installation, confirming improved efficiency.

• International journal of advanced smart convergence
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• v.9 no.2
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• pp.114-122
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• 2020

When replacing hardware due to obsolescence, discontinuation, and expansion of software-equipped electronic equipment, software changes are required in the past, but if virtualization technology is applied, it can be applied without software changes. In this regard, we studied in order to apply virtualization technology in the development of naval multi-function radar signal processing, we studied hardware and OS independency for Docker and performance comparison between Docker and virtual machine. As a result, it was confirmed that hardware and OS independence exist when using Docker and that high-speed processing is possible compared to the virtual machine.

• Smart Media Journal
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• v.4 no.4
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• pp.47-55
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• 2015

Recently, the computing paradigm has been changing and VoIP technology is being revisited to support various services in ICT field. In this paper, we have designed and implemented the systems of software PBX open source Asterisk using light-weighted virtualization Docker technique, hardware platform, and mobile devices to support voice service based on secured mobile VoIP. And we verified the delay test of network traffics and the secured voice communication test in global real network environment.

• Annual Conference of KIPS
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• 2018.10a
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• pp.71-73
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• 2018

소프트웨어 애플리케이션의 가상화를 지원하는 컨테이너(container)는 일반적인 가상머신과 같은 운영체제의 격리된 인스턴스 형태이지만 VM과는 달리 호스트 OS자원을 공유하여 자원을 효율적으로 사용할 수 있고 이식성이 좋으며 배포를 쉽게 할 수 있는 등 장점이 있다. 컨테이너의 중요성과 활용도가 높아지면서 그것을 관리하고 통제하는 오케스트레이션 솔루션도 각광을 받고 있다. 본 논문에서는 Docker에 내장된 오케스트레이션 기능 중 하나인 Docker Swarm이 과도하게 메모리를 사용하는 문제점을 해결하고자 한다. 먼저, Docker Swarm의 구조에서 Manager 노드와 Worker 노드의 서비스를 증가시켜 실행시킨 후 성능을 평가한 후 과점유의 원인을 파악한다. 실험 결과 메모리 과점유의 원인은 컨테이너가 작동을 멈춘 후에도 여전히 메모리를 점유하고 있어 컨테이너를 증가시킬수록 메모리 이용률이 줄어들지 않는 것이 증명되었다.

• Annual Conference of KIPS
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• 2020.05a
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• pp.24-27
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• 2020

Docker Swarm은 호스트 머신에서 여러 개의 컨테이너들을 실행할 때 발생하는 네트워크와 호스트 리소스 등을 포함한 여러 문제를 해결해 주기 위해 등장하였다. 하지만 컨테이너간의 메모리 경합으로 인한 성능 간섭 문제는 여전히 대두되고 있다. 본 논문에서는 성능 간섭 정도를 측정하기 위해 Docker Swarm을 이용하여 클러스터 환경을 구축하고 메모리 부하 작업을 수행하는 특정 스레드 개수 및 시간을 선정하여 다양한 실험을 진행하였다. 그 결과 특정 스레드 개수를 할당해 주었을 때 특정 시점에서 컨테이너간의 성능 간섭이 가장 크게 발생하였으며 그 이후의 시점부터는 성능 간섭 정도가 크게 나타나지 않는 것을 확인하였다. 이를 토대로 Docker Swarm에서 사용 중인 스케줄링 방법을 개선하여 컨테이너간의 성능 간섭을 최소화할 수 있는 향후 연구 방향을 모색할 수 있을 것으로 보인다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2022.10a
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• pp.341-343
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• 2022

Information service must ensure stability in service operation. For this purpose, many technologies related to HA (High-Availability) have been provided. Meanwhile, recently, a lot of information service implementations using containers are in progress. Therefore, it should be possible to implement HA in information service using containers. Docker, the most representative container platform, provides HA-related functions. In this study, we check how to implement HA using Docker and check the necessary settings. And based on the confirmed settings, the HA service using the container is implemented.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.18 no.11
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• pp.2670-2677
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• 2014

The technique of virtual machine construction using hypervisor such as Xen and KVM is mainly used for implementation of cloud computing infrastructure. This technique is efficient in allocating and managing resources compared to the existing operation methods. However it requires high resource usage when constructing virtual machines and results in wasting of resources when not using the allocated resources. Docker is a technique based on the container method to resolve such a problem. This paper shows the container method such as Docker is efficient as a web construction technique by comparing virtual machine method to container method. It is shown to be especially useful when storing data into DB or storage devices in such environments of web server or program development. In the upcoming cloud computing environment the container method such as Docker is expected to improve the resource efficiency and the convenience of management.