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This article is about how the Linux operating system builds Docker on ECS. The editor thought it was very practical, so I shared it with you as a reference. Let's follow the editor and have a look.

Build Docker (CentOS7) on ECS

This article describes the deployment process of Docker on the CentOS system. For the installation of Docker under Ubuntu system, please refer to the docker practice document.

Applicable object

It is suitable for developers who are familiar with Linux operating system and are just starting to use Aliyun ECS.

Main content

Deploy docker

Basic usage of docker

Mirror image production

Deploy Docker

This document mainly describes the steps of manually installing docker. You can also choose to purchase the corresponding image in the cloud market and deploy the CVM with one click.

The practical operating system version of this paper is CentOS 7.264 3.10.0-514.6.2.el7.x86_64.

Docker requires a 64-bit system with at least 3.10 kernel version

Add a yum feed.

# yum install epel-release-y # yum clean all# yum list

Install and run Docker.

# yum install docker-io-y # systemctl start docker

Check the installation results.

# docker info

The following xin message indicates that the installation was successful.

Basic usage of Docker

Docker daemon management.

# systemctl start docker # run the Docker daemon # systemctl stop docker # stop the Docker daemon # systemctl restart docker # restart the Docker daemon

Mirror management. This article uses an Apache image from Ali Cloud Warehouse.

# docker pull registry.cn-hangzhou.aliyuncs.com/lxepoo/apache-php5

Modify the tag. Because the image name of Ali Cloud Warehouse image is very long, you can modify the image tag in order to remember the difference.

# docker tag registry.cn-hangzhou.aliyuncs.com/lxepoo/apache-php5:latest aliweb:v1

View existing mirrors.

# docker images

Force the mirror to be deleted.

# docker rmi-f registry.cn-hangzhou.aliyuncs.com/lxepoo/apache-php5

Container management.

E121d5f99e1e is the IMAGE ID queried by executing the docker images command and entering the container using the docker run command.

# docker run-ti e121d5f99e1e / bin/bash

Use exit to exit the current container.

The run command with the-d argument allows you to run the container in the background, and-name specifies that the container is named apache.

# docker run-d-name apache e121d5f99e1e

Enter the container running in the background.

# docker exec-ti apache / bin/bash

Mirror the container.

# docker commit containerID/containerName newImageName:tag

In order to facilitate testing and recovery, first run the source image and then do a simple named image for testing.

# docker commit 4c8066cd8c01 apachephp:v1

Run the container and map the host's port 8080 to the container.

# docker run-d-p 8080VR 80 apachephp:v1

Enter the host ip plus port 8080 access test in the browser, and the following indicates that the operation is successful.

Mirror image production

Prepare the dockerfile content.

# vim Dockerfile FROM apachephp:v1 # declare the basic image source MAINTAINER DTSTACK # declare the commands that the owner of the image RUN mkdir / dtstact # RUN needs to execute before the container runs. Since the Dockerfile file cannot exceed 127lines, it is recommended to write the ENTRYPOINT ping www.aliyun.com # boot command to the script when there are too many commands. The last command here needs to be a command that can be continuously executed in the foreground. Otherwise, the container background runtime will exit because the command has been executed.

Build an image.

Docker build-t webcentos:v1. #. Is the path to the Dockerfile file. You cannot ignore docker images # to check whether docker run-d webcentos:v1 # backend runs the container docker ps # View the currently running containers docker ps-a # View all containers, including docker logs CONTAINER ID/IMAGE # that is not running, if you do not see the container you just ran Check the startup log docker commit fb2844b6c070 dtstackweb:v1 # commit with the container id or name, followed by the container id and the name and version number of the new image. Docker images # list local (downloaded and locally created) images docker push # push the image to the remote repository, default is Docker Hub

Push the image to registry.

Docker login-username=dtstack_plus registry.cn-shanghai.aliyuncs.com # enter the image repository password docker tag [ImageId] registry.cn-shanghai.aliyuncs.com/dtstack123/test: [image version number] docker push registry.cn-shanghai.aliyuncs.com/dtstack123/test: [image version number] Thank you for reading! On the Linux operating system on the ECS to build Docker method to share here, I hope the above content can be of some help to you, so that you can learn more knowledge. If you think the article is good, you can share it and let more people see it.

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