Centos7 安装Docker
CentOS7 安装Docker
前情提要：使用任意方式安装好CentOS7 ， 确保主机可以接入网络。[ 虚拟机安装建议使用桥接模式 ]
使用 addr ip 查看主机ip
由于CentOS 7 默认是不启动网卡的
vi /etc/sysconfig/network-scripts/ifcfg-ens33
可以看到（ONBOOT=no）
把这一项改为YES（ONBOOT=yes）
然后重启网络服务： sudo service network restart
然后我们再输入 ip addr 命令
为了更方便的查看ip信息 建议安装 ifconfig 命令
yum search ifconfig
-- 通过yum search 这个命令我们发现ifconfig这个命令是在net-tools.x86_64这个包里，接下来我们安装这个包就行了
yum install net-tools.x86_64
Docker 要求 CentOS 系统的内核版本高于 3.10
通过 uname -r 命令查看你当前的内核版本
[root@localhost ~]# uname -r
3.10.0-862.el7.x86_64
这里我们安装 Docker CE 即社区免费版
如果你安装过旧版本，请卸载旧的版本：
yum remove docker \
docker-client \
docker-client-latest \
docker-common \
docker-latest \
docker-latest-logrotate \
docker-logrotate \
docker-selinux \
docker-engine-selinux \
docker-engine
安装一些必要的系统工具：
yum install -y yum-utils device-mapper-persistent-data lvm2
添加软件源信息：
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
更新 yum 缓存：
yum makecache fast
安装 Docker-ce：
yum -y install docker-ce
启动 Docker 后台服务
systemctl start docker
查看Docker版本
[root@localhost ~]# docker version
Client: Docker Engine - Community
Version: 19.03.3
API version: 1.40
Go version: go1.12.10
Git commit: a872fc2f86
Built: Tue Oct 8 00:58:10 2019
OS/Arch: linux/amd64
Experimental: false
Server: Docker Engine - Community
Engine:
Version: 19.03.3
API version: 1.40 (minimum version 1.12)
Go version: go1.12.10
Git commit: a872fc2f86
Built: Tue Oct 8 00:56:46 2019
OS/Arch: linux/amd64
Experimental: false
containerd:
Version: 1.2.10
GitCommit: b34a5c8af56e510852c35414db4c1f4fa6172339
runc:
Version: 1.0.0-rc8+dev
GitCommit: 3e425f80a8c931f88e6d94a8c831b9d5aa481657
docker-init:
Version: 0.18.0
GitCommit: fec3683
可见我们的 Docker 的 Client 和 Server 已经正常安装了
更改镜像源
vi /etc/docker/daemon.json
写入如下内容[使用网易镜像]
{
"registry-mirrors": ["http://hub-mirror.c.163.com"]
}
重启Docker服务
systemctl daemon-reload
systemctl restart docker
拉取Hello world 镜像
docker pull hello-world
[root@localhost ~]# docker pull hello-world
Using default tag: latest
latest: Pulling from library/hello-world
Digest: sha256:c3b4ada4687bbaa170745b3e4dd8ac3f194ca95b2d0518b417fb47e5879d9b5f
Status: Image is up to date for hello-world:latest
docker.io/library/hello-world:latest
查看镜像[ 如下 我们已经拉取hello world 到本地了 ]
[root@localhost ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
hello-world latest fce289e99eb9 9 months ago 1.84kB
下面运行hello world [ 如下已经顺利的运行的hello world ]
[root@localhost ~]# docker run hello-world
Hello from Docker!
This message shows that your installation appears to be working correctly.
To generate this message, Docker took the following steps:
1. The Docker client contacted the Docker daemon.
2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
(amd64)
3. The Docker daemon created a new container from that image which runs the
executable that produces the output you are currently reading.
4. The Docker daemon streamed that output to the Docker client, which sent it
to your terminal.
To try something more ambitious, you can run an Ubuntu container with:
$ docker run -it ubuntu bash
Share images, automate workflows, and more with a free Docker ID:
https://hub.docker.com/
For more examples and ideas, visit:
https://docs.docker.com/get-started/
如要您想要删除docker ce
$ sudo yum remove docker-ce
$ sudo rm -rf /var/lib/docker
? see you