云原生之容器编排实践-在CentOS7上安装使用Docker

[root@k8s0 local]# uname -a
Linux k8s0 3.10.0-1127.el7.x86_64 #1 SMP Tue Mar 31 23:36:51 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
[root@k8s0 local]# cat /proc/version
Linux version 3.10.0-1127.el7.x86_64 (mockbuild@kbuilder.bsys.centos.org) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-39) (GCC) ) #1 SMP Tue Mar 31 23:36:51 UTC 2020
[root@k8s0 local]# cat /etc/redhat-release
CentOS Linux release 7.8.2003 (Core)

内存：4G
处理器：2*2
硬盘：100G

# 安装依赖项
yum install -y yum-utils
yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum makecache fast
# 安装Docker
yum install docker-ce
# 查看版本信息
[root@k8s0 ~]# docker -v
Docker version 20.10.17, build 100c701
# 启动Docker
systemctl status docker
systemctl start docker
# 开机自启
systemctl enable docker
# 关闭防火墙
systemctl stop firewalld
systemctl disable firewalld

[root@k8s0 ~]# docker pull hello-world
Using default tag: latest
latest: Pulling from library/hello-world
2db29710123e: Pull complete 
Digest: sha256:7d246653d0511db2a6b2e0436cfd0e52ac8c066000264b3ce63331ac66dca625
Status: Downloaded newer image for hello-world:latest
docker.io/library/hello-world:latest
[root@k8s0 ~]# 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/

# 列出本地已有镜像
docker images
# 从远端下载镜像
docker pull <image name>
# 使用镜像创建并启动一个容器（若本地没有该镜像，则会先从远端下载，每次run都会生成一个容器，嗯，轻量~）
docker run hub.c.163.com/library/hello-world:latest
# 列出正在运行的容器
docker ps
# 列出所有容器（包括Exited）
docker ps -a
# 启动指定的容器
docker start <container id>
# 停止指定的容器
docker stop <container id>
# 停止所有运行中的容器
docker stop $(docker ps -q)
# 删除指定容器
docker rm <container id>
# 删除所有容器
docker rm $(docker ps -aq)
# 停止并删除容器
docker stop $(docker ps -q) & docker rm $(docker ps -aq)
# 删除指定镜像（删除镜像前须先停止并删除容器）
docker rmi <image id>