kubernetes（一）之Docker基础入门

[root@centos7-node1 ~]# systemctl stop firewalld && systemctl disable firewalld
[root@centos7-node1 ~]# sed -i "s/SELINUX=permissive/SELINUX=disabled/g" /etc/selinux/config && reboot -f
[root@centos7-node1 ~]# yum install chrony wget curl git -y && systemctl enable chronyd && systemctl start chronyd && timedatectl set-timezone Asia/Shanghai && timedatectl set-ntp yes    #时间同步
[root@centos7-node1 ~]# wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
[root@centos7-node1 ~]# yum -y install epel-release
[root@centos7-node1 ~]# echo "net.ipv4.ip_forward=1" >> /etc/sysctl.conf  &&  sysctl -p

# step 1: 安装必要的一些系统工具
 yum install -y yum-utils device-mapper-persistent-data lvm2
# Step 2: 添加软件源信息
yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
# Step 3: 更新并安装Docker-CE
yum makecache fast
yum -y install docker-ce

# 新增配置文件
 mkdir -p /etc/docker
 tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://0b8hhs68.mirror.aliyuncs.com"],
  "storage-driver": "overlay2",
  "graph":"/data/docker",
  "storage-opts": [
    "overlay2.override_kernel_check=true"
  ]
}
EOF
# 重载服务
sudo systemctl daemon-reload
sudo systemctl restart docker

docker info     #查看docker 信息
docker version   #查看版本信息

[root@centos7-node1 ~]# docker image -h
Flag shorthand -h has been deprecated, please use --help
Usage: docker image COMMAND
Manage images
Commands:
  build Build an image from a Dockerfile
  history Show the history of an image
  import Import the contents from a tarball to create a filesystem image
  inspect Display detailed information on one or more images
  load Load an image from a tar archive or STDIN
  ls List images
  prune Remove unused images
  pull Pull an image or a repository from a registry
  push Push an image or a repository to a registry
  rm Remove one or more images
  save Save one or more images to a tar archive (streamed to STDOUT by default)
  tag Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE

[root@centos7-node1 ~]# docker container -h
Flag shorthand -h has been deprecated, please use --help
Usage: docker container COMMAND
Manage containers
Commands:
  attach Attach local standard input, output, and error streams to a running container
  commit Create a new image from a container's changes
  cp Copy files/folders between a container and the local filesystem
  create Create a new container
  diff Inspect changes to files or directories on a container's filesystem
  exec Run a command in a running container
  export Export a container's filesystem as a tar archive
  inspect Display detailed information on one or more containers
  kill Kill one or more running containers
  logs Fetch the logs of a container
  ls List containers
  pause Pause all processes within one or more containers
  port List port mappings or a specific mapping for the container
  prune Remove all stopped containers
  rename Rename a container
  restart Restart one or more containers
  rm Remove one or more containers
  run Run a command in a new container
  start Start one or more stopped containers
  stats Display a live stream of container(s) resource usage statistics
  stop Stop one or more running containers
  top Display the running processes of a container
  unpause Unpause all processes within one or more containers
  update Update configuration of one or more containers
  wait Block until one or more containers stop, then print their exit codes

[root@centos7-node1 ~]# docker search redis    #查找redis镜像
[root@centos7-node1 ~]# docker pull redis:4-alpine    #拖镜像
[root@centos7-node1 ~]# docker images    #查看所有镜像
[root@centos7-node1 ~]# docker inspect redis:4-alpine     #查看镜像详情
[root@centos7-node1 ~]# docker rmi redis:4-alpine           #删除镜像
[root@centos7-node1 ~]# docker image save redis:4-alpine -o redis.tar     #导出镜像
[root@centos7-node1 ~]# docker image load -i redis.tar         #导入镜像

[root@centos7-node1 ~]# docker login --username=valiente0822 registry.cn-hangzhou.aliyuncs.com   #登陆我的阿里云docker镜像仓库
[root@centos7-node1 ~]# docker image tag redis:4-alpine registry.cn-hangzhou.aliyuncs.com/myimgs/redis:4-alpine   #拷贝并修改tag
[root@centos7-node1 ~]# docker push registry.cn-hangzhou.aliyuncs.com/myimgs/redis:4-alpine    #上传镜像
[root@centos7-node1 ~]# docker pull registry.cn-hangzhou.aliyuncs.com/myimgs/redis:4-alpine      #下载镜像

[root@centos7-node1 ~]# docker image pull centos:7   #拉取镜像
[root@centos7-node1 ~]# docker container run -it --name c1 centos:7 /bin/bash    #交互式运行容器
[root@centos7-node1 ~]# iptables -t nat -vnL    #新开终端，发现有nat iptables规则
[root@centos7-node1 ~]# docker ps -a             #查看运行或者停止状态的容器
[root@centos7-node1 ~]# docker start c1          #启动容器
[root@centos7-node1 ~]# docker ps                  #查看运行状态的容器