Is docker a vps?

Docker is not vps. Docker is an open source application container engine, an advanced container engine based on LXC; vps is the abbreviation of "Virtual Private Server", which is a virtual private server. The technology to implement VPS is divided into containers and virtualization technology, so docker is not a vps.

The operating environment of this tutorial: linux7.3 system, docker-1.13.1 version, Dell G3 computer.

Is docker a vps

What does docker mean?

docker has two meanings:

1. The Chinese translation of the English word docker is dock worker (noun), and the third person plural is dockers;

2. Refers to the Docker container

Docker is an open source application container engine that allows developers to package their applications and dependency packages into a portable image and then publish it to any popular Linux or Windows operating system machine , virtualization can also be achieved. Containers completely use the sandbox mechanism and will not have any interfaces with each other.

Docker containers are similar to virtual machines, but they are different in principle. Containers virtualize the operating system layer, and virtual machines are virtualized hardware. Therefore, containers are more portable and use servers efficiently. Containers are used more to represent a standardized unit of software. Due to the standardization of containers, it can be deployed anywhere regardless of infrastructure differences. In addition, Docker also provides containers with stronger industry isolation compatibility.

Docker uses the resource separation mechanism in the Linux core, such as cgroups, and Linux core namespaces (namespaces), to create independent containers (containers). This can operate under a single Linux entity, avoiding the additional burden of launching a virtual machine [3]. The Linux kernel's support for namespaces completely isolates the application's view of the working environment, including the process tree, network, user ID and mounted file system, while the core cgroup provides resource isolation, including CPU, memory, block I/O and network. Starting from version 0.9, Dockers began to include the libcontainer library as a way to directly use the virtualization facilities provided by the Linux kernel on the basis of using abstract virtualization through the interface provided by libvirt's LXC and systemd-nspawn.

What does vps mean?

VPS (Virtual Private Server) technology divides a server into multiple virtual private servers to provide high-quality services. The technology to implement VPS is divided into container technology and virtualization technology. In a container or virtual machine, each VPS can be equipped with an independent public IP address and an independent operating system to isolate the disk space, memory, CPU resources, processes and system configurations between different VPSs, simulating a virtual environment for users and applications. The experience of "exclusive" use of computing resources. VPS can reinstall the operating system, install programs, and restart the server independently just like a standalone server. VPS provides users with the freedom of management and configuration, and can be used for enterprise virtualization or IDC resource rental. The specific management can be found on Alibaba Cloud.

IDC resource rental, provided by VPS provider. Due to differences in the hardware VPS software used by different VPS providers and different sales strategies, the VPS experience is also quite different. Especially when the VPS provider oversells and causes the physical server to be overloaded, VPS performance will be greatly affected. Relatively speaking, container technology is more efficient in hardware usage than virtual machine technology and is easier to oversell. Therefore, generally speaking, the price of container VPS is higher than the price of virtual machine VPS.

These VPS hosts share hardware, software licenses, and management resources for maximum efficiency. Each VPS host can be equipped with an independent public IP address, independent operating system, independent large space, independent memory, independent CPU resources, independent execution programs and independent system configuration. In addition to assigning multiple virtual hosts and unlimited In addition to corporate mailboxes, it also has independent host functions. You can install programs by yourself and restart or reinstall the host independently (some virtualization/container technologies do not support kernel replacement).

A simple understanding of VPS is a system isolated through virtualization technology.

Recommended learning: "docker video tutorial"

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