Introduction to Docker in devops

Introduction to Docker

Docker is open to develop, send and process applications. The Docker allows you to separate your requests for your infrastructure so that you can quickly submit to the program. With Dock, you can manage your infrastructure the same way as you manage your applications. Through Docker's methodologies, experimenting and implementing the law quickly, you can greatly reduce the delay of writing and executing products.

Docker Equipment

The Docker offers the ability to connect and apply the application in a flexible and isolated environment called a container. Routine and security allow you to get more containers to accompany a host. The containers are mild, because they do not need extra pressure on the drawer, but can work directly on the host computer. This means you can transfer multiple computers to a compatible device if you are using a technical machine. You can even put Docker containers inside the hosting machines of the actual machines!

The docker provides tools and web pages to manage the life cycle of its container:

Improve your applications and support areas by using containers.
The container will be a unit to divide and test your application.
When you are ready, implement your application in your product area, such as the orchestra or utility service. This works in the same way as if your product environment is a local data center, both the cloud carrier or the knife.

Docker Engine

Docker is a client-client application with major categories:

A service that is part of a long-term program known as an embargo (dockerd rule).
The REST API identifies the integration of programs they can use to talk about ethnicity and tell them what to do.
Mediation Client (CLI)

The CLI uses the Docker REST API to control or interrupt Docker loyalty through CLI directives or text. Many other applications of Docker use the API and CLI. The boat creates and manages Docker items, such as drawings, containers, networks and volumes.

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What can I use for Docker?

Rapid discharge and regular payment of your applications

The Docker will advance the life cycle of development by allowing the development to work in the ordinary environments using local products that offer their applications and services. Containers are very good at regular interdisciplinary work and regular delivery (CI / CD).

Consider the following events:

Developers write local code and share their work with friends using the Docker containers.
Use Docker to take their application tests to an environment and carry automated and manual tests.
When developers find fault, they can correct the development environment and re-deploy the environment for the tests and approvals.
Once the exam is completed, the availability of the client solution is as easy as sending a new image of the product environment.

Expensive and intangible

Temporary transit scheme of the package allows for serious work. The length containers can work on the manufacturer's own laptop, physical or mechanical machines in a data center, essential suppliers or integrated areas.

Kaaraynta and the nature of light Docker also enable active management of labor, increasing or reducing looga applications and services such as business needs require, almost in real time.

Working on many challenges on one device

The movement is fast and easy. It provides a reasonable and cost-effective replacement of machines on the basis of the customer, so you can use many of your competencies to reach your business goals. The docker is suited to the high density environment and small and medium-sized areas that you need to do more than just a few resources.

Docker architecture

Docker uses server-server-client clients. Docker customers talk to the clay pot, who is responsible for the construction, execution and distribution of clothing items. The client and the Docker can operate in the same system, or you can connect a Docker customer at a remote location. Docker and client devices are passed through the API REST, through a UNIX or networked network.

Docker daemon

The Docker tool (rock) listens to the Docker API applications and and management of drug substances, such as photos, articles, websites and volume. The boat may also be able to contact other pets to run Docker services.

Docker customers

Docker customers are the most commonly used tool users in the Docker. When you use the rules for enforcing the document, the client will order these orders to set up, which enforces. The command prompt uses the API Docker. Docker customers can contact more than one campus.

Docker Register

The Docker Register saves the pictures of the clothes. Hub Hub and Docker Cloud are public records that anyone can use, Docker is defined to search the Docker Hub default images. You can also manage the private register. If you use the Docking Datacenter (DDC), it includes Datasheet Register (DTR).

When you use a drag / drop or longitude codec, the required sounds are found on your record. When you use a mobile phone code, your photo is uploaded to your registry.

The Docker Store allows you to buy and sell images that are posted or distributed free of charge. For example, you can buy a Docker Card in an application or service from a dealer who uses a photo to implement the application in the test, storage, and production areas. You can renew the application by dragging a new image of the image and recycling containers.

Important elements

When you use the Docker, you can create and use the pictures, boards, networks, volume, mixtures, and other objects. This section is a brief description of some of these items.

Image

A photo is a read-only format with instructions for creating a closed container. Often, one image is based on another feature, with some additional consideration. For example, you can create a photo-based image, but install the Apache website and its application, as well as details of the configuration required to make your request.

You can create special pictures or just use those created by others that are published in the registry. To create your own image, create Dockerfile using a simple word to describe the necessary steps to create a picture and image. Each hint of Dockerfile creates the image layer. When you change Dockerfile and rebuild the image, only the layers of the layers have been rebuilt. This is part of what makes the pictures very light, small, faster, compared to other artistic designs

Container

The container is an example of a picture. You can create, start, stop, move or delete a container using the Docker API or CLI. You can attach a container to one or more networks, post storage or even create a new image based on the current situation.

Accordingly, the container is well separated from other containers looga host machine. You can control the segmentation of the network, storage, or other substances contained in the container of other containers or guest machines.

The container is defined as its appearance, as well as the configuration designs that it provides when starting or starting. Once the container is canceled, a change in its government is not stored for regular storage.

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