Docker Machine远程部署Docker

一、docker machine概要

Docker Machine发布之前，你可能会遇到以下问题：

①你需要登录主机，按照主机及操作系统特有的安装以及配置步骤安装Docker，使其能运行Docker容器
②你需要研发一套工具管理多个Docker主机并监控其状态
③你在本地开发，产品部署在公有云平台，你希望能尽可能的减小两个环境的差异性

Docker Machine的出现解决了以上问题。

①Docker Machine简化了部署的复杂度，无论是在本机的虚拟机上还是在公有云平台，只需要一条命令便可搭建好Docker主机
②Docker Machine提供了多平台多Docker主机的集中管理
③Docker Machine 使应用由本地迁移到云端变得简单，只需要修改一下环境变量即可和任意Docker主机通信部署应用

二、docker machine在远程主机部署docker

环境:

docker-machine主机：192.168.1.9  docker版本：docker-ce
docker主机：192.168.1.10

步骤：
①更新curl
[root@node1 ~]#yum update curl -y

②安装docker-machine
安装可参考docker-machine官网
linux下载路径：

curl -L https://github.com/docker/machine/releases/download/v0.13.0/docker-machine-`uname -s`-`uname -m` >/tmp/docker-machine && install /tmp/docker-machine /usr/local/bin/docker-machine

按需求直接复制粘贴安装即可
[root@node1 ~]# docker-machine -v
docker-machine version 0.13.0, build 9ba6da9

③创建ssh密钥对，实现两主机无密登录
[root@node1 ~]# ssh-keygen
[root@node1 ~]# ssh-copy-id 192.168.1.10

④为本地下载更多镜像源，避免在创建machine时找不到软件包
此为阿里云centos7镜像源：

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

第三方源：
[root@node1 ~]# yum install epel-release

⑤开启machine通讯端口
[root@node1 ~]# firewall-cmd --add-port=2376/tcp --permanent
[root@node1 ~]# firewall-cmd --reload

⑥创建docker主机,命名host1
[root@node1 ~]# docker-machine create -d generic --generic-ip-address=192.168.1.10 host1

Running pre-create checks...
Creating machine...
(swarm-master) No SSH key specified. Assuming an existing key at the default location.
Waiting for machine to be running, this may take a few minutes...
Detecting operating system of created instance...
Waiting for SSH to be available...
Detecting the provisioner...
Provisioning with centos...
Running...

[root@node1 ~]# docker-machine ls

NAME           ACTIVE   DRIVER    STATE     URL                       SWARM                   DOCKER        ERRORS
host1   -        generic   Running   tcp://192.168.1.10:2376      v17.12.1-ce

⑦变更docker环境变量
[root@node1 ~]# docker-machine env host1

export DOCKER_TLS_VERIFY="1"
export DOCKER_HOST="tcp://192.168.1.10:2376"
export DOCKER_CERT_PATH="/root/.docker/machine/machines/host1"
export DOCKER_MACHINE_NAME="host1"
# Run this command to configure your shell: 
# eval $(docker-machine env host1)

[root@node1 ~]# eval $(docker-machine env host1)

⑧运行容器查看两端是否同步
[root@node1 ~]# docker run -d busybox
[root@node1 ~]# docker-machine ssh host1
[root@host1 ~]# docker image ls

REPOSITORY              TAG                 IMAGE ID            CREATED             SIZE
busybox                 latest              f6e427c148a7        6 days ago          1.15MB

[root@host1 ~]# docker ps

CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS                         PORTS                              NAMES
8d9b5005a264        busybox             "sh"                     17 seconds ago      Up 16 seconds ago                                         modest_joliot

[root@host1 ~]# exit
[root@node1 ~]# docker ps

CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS                         PORTS                              NAMES
8d9b5005a264        busybox             "sh"                    57seconds ago      Up 16 seconds ago                                         modest_joliot

镜像容器同步测试成功

Docker Machine远程部署Docker