docker version和docker info

docker基本命令

docker version

[root@docker ~]# docker version
Client: Docker Engine - Community
 Version:           20.10.12
 API version:       1.41
 Go version:        go1.16.12
 Git commit:        e91ed57
 Built:             Mon Dec 13 11:45:41 2021
 OS/Arch:           linux/amd64
 Context:           default
 Experimental:      true

Server: Docker Engine - Community
 Engine:
  Version:          20.10.8
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.16.6
  Git commit:       75249d8
  Built:            Fri Jul 30 19:54:13 2021
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.4.12
  GitCommit:        7b11cfaabd73bb80907dd23182b9347b4245eb5d
 runc:
  Version:          1.0.2
  GitCommit:        v1.0.2-0-g52b36a2
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

　　

docker  info

docker info

Client:  # client端
 Context:    default
 Debug Mode: false # 是否开启debug模式
 Plugins:
  app: Docker App (Docker Inc., v0.9.1-beta3)
  buildx: Docker Buildx (Docker Inc., v0.7.1-docker)
  scan: Docker Scan (Docker Inc., v0.12.0)

Server:  # server端
 Containers: 29 # 容器个数
  Running: 7    # 正在运行的容器个数 
  Paused: 0     # 暂停的容器个数
  Stopped: 22   # 停止的容器个数 
 Images: 36     # 镜像个数 
 Server Version: 20.10.8    # 当前服务器docker server的版本
 Storage Driver: overlay2   # 存储驱动，一般为overlay2,性能好速度快 其它驱动：aufs,overlay,brtfs
  Backing Filesystem: xfs   # 服务器文件系统
  Supports d_type: true
  Native Overlay Diff: true
  userxattr: false
 Logging Driver: json-file  # 日志驱动
 Cgroup Driver: systemd     # 限制隔离的驱动，生产环境建议用systemd
 Cgroup Version: 1
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog  # docker支持的日志驱动
 Swarm: inactive                                                                       # docker官方的容器编排工具，inactive 表示不开启，active表示开启
 Runtimes: io.containerd.runc.v2 io.containerd.runtime.v1.linux runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: 7b11cfaabd73bb80907dd23182b9347b4245eb5d
 runc version: v1.0.2-0-g52b36a2
 init version: de40ad0
 Security Options:
  seccomp
   Profile: default
 Kernel Version: 3.10.0-1160.el7.x86_64
 Operating System: CentOS Linux 7 (Core)
 OSType: linux
 Architecture: x86_64
 CPUs: 4
 Total Memory: 3.682GiB
 Name: docker
 ID: Q6VL:YDEA:D2YS:RKAJ:IQSB:X5ZL:JA37:QOZI:QQZW:CFTC:V72F:RFXH
 Docker Root Dir: /var/lib/docker    # docker的根目录，建议和系统盘分开
 Debug Mode: false
 Registry: https://index.docker.io/v1/
 Labels:
 Experimental: false
 Insecure Registries:
  192.168.30.104
  127.0.0.0/8
 Registry Mirrors:
  https://registry.docker-cn.com/
  https://hub-mirror.c.163.com/
  https://docker.mirrors.ustc.edu.cn/
 Live Restore Enabled: false  # docker热更新，生产环境建议开启

　　

镜像操作

搜索镜像

docker search  imageName

 拉取镜像

docker pull  imageName:version
不加版本号默认为latest

查看镜像

docker images

修改标签

docker  tag  nginx:v1 nginx:v2
# v1 变为 v2

镜像仓库登录

docker  login

推送镜像到仓库

docker push  xxx/xxx/xxx:v1

 

容器操作

启动容器

使用 run   -it  前台启动一个容器

docker  run  -ti  nginx  bash
# 也可以使用  -ti  --rm   参数，表示启动的容器退出后即删除

如果一个容器需要一直运行，可以使用-d后台启动

docker  -tid   nginx  bash
# 也可以使用  --restart=always  指定重启策略，容器异常会自动重启