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
