Installing Docker under CENTOS7 (14 installing Docker machine)

Before we did the experiment is on a host, in fact, in the real environment there are multiple hosts, containers on these hosts to start, run, stop and destroy, related containers will communicate with each other over the network, whether they are running on the same host.

For this kind of song Multi-host environment, how should we manage it efficiently?

The first problem is: Install and configure Docker for all hosts

Previously, we installed a Docker host manually:

1. Install the HTTPS CA certificate

2. Add GPG Key

3. Add Docker apt Source

4. Installing Docker

for multi-master environments where manual methods are inefficient and not easy to guarantee consistency, the solution for Docker is the Docker machine

Docker machine allows you to install and configure Docker host in bulk, which can be a local VM, a physical machine, or a cloud host in a public cloud

Docker machine supports the installation of Docker host in different environments, including:

1. Regular Linux operating system;

2. Virtualization Platform-virtualbox,vmware,hyper-v

3.Openstack

4. Public cloud-amazon Web services,microsoft azure,google Compute engine,digital Ocean etc.

Docker Machine has a unified name for these environments: provider

Configure the Docker host with the appropriate driver installation for a specific provider,docker machine

Installing Docker Machine

Lab Environment: Host name IP operating system

Docker 192.168.7.222 Centos7

Docker1 192.168.7.235 centos7

Docker2 192.168.7.231 centos7

I'll install Docker machine on 192.168.7.222 Docker and then deploy Docker on the other two hosts with the Docker machine command

To install Docker machine, refer to the official documentation: https://docs.docker.com/machine/install-machine/#install-machine-directly

Executes the docker-machine version Validation command is available

Note: It is recommended to build according to official documents

Install bash Completion script so that bash can fill commands and Parameters with tab:

Download Completion Script:docker-machine-prompt.bash Docker-machine-wrapper.bash Docker-machine.bash place it in/etc/bash_compl Under the ETION.D directory

The command is: Scripts= (Docker-machine-prompt.bash docker-machine-wrapper.bash docker-machine.bash ); For i in "${scripts[@]}"; Do sudo wget https://raw.githubusercontent.com/docker/machine/v0.13.0/contrib/completion/bash/${I }-P/ETC/BASH_COMPLETION.D; Done

Then add the following code to the ~/.BASHRC

Ps1= ' [\[email protected]\h \w$ (__docker_machine_ps1)]\$ '

If a situation arises:

Change ~/.BASHRC and add the following three lines in BASHRC:

Source/etc/bash_completion.d/docker-machine-wrapper.bash
Source/etc/bash_completion.d/docker-machine-prompt.bash
Source/etc/bash_completion.d/docker-machine.bash

Re-source under BASHRC

Source/root/.bashrc

The installation is complete at this location Docker-machine!

How to uninstall Docker-machine, you can refer to the official documentation!

Installing Docker under CENTOS7 (14 installing Docker machine)