[Docker]Docker Common Commands Cheat Sheet

A recent project involved MongoDB clusters, Spark clusters, Hadoop clusters, Python 2.7, Python 3.5, various recommendation algorithms, Java Resin environment, LNMP environment, vsftpd, and more. Because it needed to be deployed across intranet, testing, and production environments, each deployment was painful. This is where Docker’s benefits really shone – packing Python environments, LNMP environments, vsftpd, and everything else into Docker containers was extremely satisfying. After 2 months of deployment and integration testing, I compiled some practical Docker commands. System environment: CentOS 7

Download, install Docker, and start the service
https://download.docker.com/linux/centos/7/x86_64/stable/Packages/
Download docker-ce-18.03.1.ce-1.el7.centos.x86_64.rpm
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yum install docker-ce-18.03.1.ce-1.el7.centos.x86_64.rpm service docker start

Common Docker commands
Fix error: WARNING: IPv4 forwarding is disabled. Networking will not work.

Step 1: On the host machine, run echo "net.ipv4.ip_forward=1" >>/usr/lib/sysctl.d/00-system.conf

Step 2: Restart network and Docker services

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[root@localhost /]# systemctl restart network && systemctl restart docker

Failed to get D-Bus connection: Operation not permitted

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docker run -d --name centos7 --privileged=true --net=host -v /home/code:/home/code centos:mysql_python3_jdk1.8 /usr/sbin/init

Run a Docker container for a long time with host path mounting

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docker run -dit -v /home/code:/home/code python35:latest /bin/bash

Enter a running Docker container

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docker exec -it container_id /bin/bash

Start a container image

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docker run -it python35:latest /bin/bash

Docker export:

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docker export -o /home/python35.tar container_id

docker save *.tar

Docker import:

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docker import /home/python35.tar

docker load < *.tar

Docker tagging

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docker tag image_id REPOSITORY:TAG

Docker specify host network

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docker run -dit --net=host python35:latest /bin/bash

Docker sync container and host time

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docker run -dit -v /etc/localtime:/etc/localtime python35:latest /bin/bash

Install JDK 1.8

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yum install java-1.8.0-openjdk* -y

Install MySQL 5.6

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rpm -Uvh http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm
yum -y install mysql-community-server
systemctl enable mysqld
systemctl start mysqld
Initialize:
mysql_secure_installation
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'remote_login_password' WITH GRANT OPTION;
FLUSH PRIVILEGES;

Python 3 encoding

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echo 'export LANG=zh_CN.UTF-8' >> ~/.bashrc