{"id":5423,"date":"2021-03-18T09:58:00","date_gmt":"2021-03-18T02:58:00","guid":{"rendered":"https:\/\/briswell-vn.com\/?p=5423"},"modified":"2021-03-18T10:02:32","modified_gmt":"2021-03-18T03:02:32","slug":"launch-with-docker","status":"publish","type":"post","link":"https:\/\/www.briswell-vn.com\/en\/news\/launch-with-docker\/","title":{"rendered":"Launch Web with Docker"},"content":{"rendered":"

<\/p>\n

I. WHAT IS DOCKER?<\/strong><\/h2>\n

Docker is an open platform for developing, deploying, shipping, and running applications. Docker enables you to separate your applications from your infrastructure so you can deliver software quickly. With Docker, you can manage your infrastructure in the same ways you manage your applications. By taking advantage of Docker\u2019s methodologies for shipping, testing, and deploying code quickly, you can significantly reduce the delay between writing code and running it in production.<\/span><\/p>\n

II. BENEFITS OF DOCKER<\/strong><\/h2>\n

Unlike virtual machines, Docker starts and stops in seconds.<\/span><\/p>\n

You can launch the container on each system that you want.<\/span><\/p>\n

Containers can be built and removed faster than virtual machines.<\/span><\/p>\n

Easy to set up working environment. Just config once only and never have to reinstall dependencies.<\/span><\/p>\n

It keeps your work-space cleaner when you delete the environment that affects other parts.<\/span><\/p>\n

III. INSTALL<\/strong><\/h2>\n

See the instructions: <\/span>https:\/\/docs.docker.com\/get-docker\/<\/a><\/span><\/p>\n

IV. IMAGE<\/strong><\/h2>\n

Docker Image is a read-only template used to create containers. Image is structured of layers and all layers are read-only. Create an image can be based on another image with some additional customization. In short, Docker Image is a place to store environment settings such as OS, packages, software to run\u2026<\/span><\/p>\n

V. CONTAINER<\/strong><\/h2>\n

Docker Container is created from Docker Image, which contains everything needed to be able to run an application. As virtualization but the Container is very light, can be considered as a system process. It only takes a few seconds to start, stop or restart a Container. With a physical server, instead of running a few traditional virtual machines, we can run several dozen, even several hundred Docker Containers.<\/span><\/p>\n

VI. COMPARE CONTAINER AND VIRTUAL MACHINE<\/strong><\/h2>\n

\"\"<\/p>\n\n\n\n\n\n\n\n\n
<\/td>\nCONTAINER<\/strong><\/td>\nVIRTUAL MACHINE<\/strong><\/td>\n<\/tr>\n
Resource<\/span><\/td>\nThe process in the container directly uses real resources, but the operating system can stipulate each process a different resource limit\u00a0 (or unlimited).<\/span><\/td>\nEverything is limited by virtual hardware.<\/span><\/td>\n<\/tr>\n
Execution<\/span><\/td>\nThe real OS runs the software.<\/span><\/td>\nReal OS \u2192 Virtual OS \u2192 Virtual OS running the software. (For VPS, Hypervisor type 1 replaces the real OS)<\/span><\/td>\n<\/tr>\n
Performance<\/span><\/td>\nReal software runs on real hardware. Starting speed is almost a normal software.<\/span><\/td>\nReal hardware has to carry a virtual OS. Since the computer was booted up, it took time until the software was used.<\/span><\/td>\n<\/tr>\n
Security<\/span><\/td>\nProcesses in the same container can still affect each other. But normally each container should only run one process. Processes of different containers cannot affect each other.<\/span><\/td>\nSoftware has malicious code can affect other process resources in the same VM<\/span>.<\/span><\/td>\n<\/tr>\n
Support software<\/span><\/td>\nDocker Engine, LXC Linux Container, Apache Mesos, CRI-O (Kubernetes)\u2026<\/span><\/td>\nVirtualBox, VMWare, Microsoft Hyper-V, Parallels, Linux KVM, Docker Machine\u2026<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

VII. DOCKERFILE<\/strong><\/h2>\n

\u2013 Dockerfile is a config file for Docker to build the image. It uses a basic image to build the initial image class. Some basic images: python, ubuntu and alpine. Then if there are additional layers then it is stacked on top of the base layer.<\/span><\/p>\n

\u2013 The config :<\/span><\/p>\n