docker 常用命令（一）
1）帮助启动类命令
systemctl start docker 启动docker
systemctl stop docker 停止docker
systemctl restart docker 重启docker
systemctl status docker 查看docker状态
systemctl enable docker 设置开机启动docker
Created symlink /etc/systemd/system/multi-user.target.wants/docker.service → /usr/lib/systemd/system/docker.service.
docker info查看docker简要信息
docker --help 查看docker帮助文档
docker cmd --help 查看docker命令帮助文档（具体的某个命令，比如run命令帮助文档：docker run --help）
查看docker cp命令帮助文档
[root@WIND ~]# docker cp --help Usage: docker cp [OPTIONS] CONTAINER:SRC_PATH DEST_PATH|- docker cp [OPTIONS] SRC_PATH|- CONTAINER:DEST_PATH Copy files/folders between a container and the local filesystem Use '-' as the source to read a tar archive from stdin and extract it to a directory destination in a container. Use '-' as the destination to stream a tar archive of a container source to stdout. Options: -a, --archive Archive mode (copy all uid/gid information) -L, --follow-link Always follow symbol link in SRC_PATH
2）docker镜像命令
docker images 查看本地镜像
[root@WIND ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE hello-world latest feb5d9fea6a5 5 months ago 13.3kB
REPOSITORY 仓库
TAG代表版本号
IMAGE ID 镜像ID
CREATED 创建时间
SIZE镜像大小
同一个镜像可以有多个TAG（多个版本号）
一般使用REPOSITORY:TAG来定义不同的镜像
如果不指定，默认就使用LATEST,如nginx:latest
docker search 查找镜像
[root@WIND ~]# docker search nginx NAME DEscriptION STARS OFFICIAL AUTOMATED bitnami/nginx Bitnami nginx Docker Image 119 [OK] bitnami/wordpress-nginx Bitnami Docker Image for WordPress with NGINX 55 [OK] ubuntu/nginx Nginx, a high-performance reverse proxy & we… 33 bitnami/nginx-ingress-controller Bitnami Docker Image for NGINX Ingress Contr… 16 [OK] rancher/nginx-ingress-controller 10 ibmcom/nginx-ingress-controller Docker Image for IBM Cloud Private-CE (Commu… 4 bitnami/nginx-ldap-auth-daemon 3 rancher/nginx-ingress-controller-defaultbackend 2 circleci/nginx This image is for internal use 2 bitnami/nginx-exporter 1 rancher/nginx 1 nginx Official build of Nginx. 0 [OK] wallarm/nginx-ingress-controller Kubernetes Ingress Controller with Wallarm e… 0 rancher/nginx-conf 0 rancher/nginx-ssl 0 ibmcom/nginx-ppc64le Docker image for nginx-ppc64le 0 rancher/nginx-ingress-controller-amd64 0 ibmcom/nginx-ingress-controller-ppc64le Docker Image for IBM Cloud Private-CE (Commu… 0 rancher/nginx-proxy 0 bitnami/nginx-intel 0 wallarm/nginx-ingress-controller-amd64 Kubernetes Ingress Controller with Wallarm e… 0 ibmcom/nginx-ingress-controller-amd64 0 ibmcom/nginx-ingress-controller-s390x 0 kasmweb/nginx An Nginx image based off nginx:alpine and in… 0 wallarm/nginx-amd64 0
我们可以看到有个offical那一列是带OK的，这个是官方认证的
一般用这个
如果觉得search出来的结果太多了，我们可以加–limit参数，不要那么多结果
[root@WIND ~]# docker search nginx --limit 10
docker pull 下载镜像
[root@WIND ~]# docker pull nginx Using default tag: latest latest: Pulling from library/nginx a2abf6c4d29d: Pull complete a9edb18cadd1: Pull complete 589b7251471a: Pull complete 186b1aaa4aa6: Pull complete b4df32aa5a72: Pull complete a0bcbecc962e: Pull complete Digest: sha256:0d17b565c37bcbd895e9d92315a05c1c3c9a29f762b011a10c54a66cd53c9b31 Status: Downloaded newer image for nginx:latest docker.io/library/nginx:latest 默认下载最新版latest镜像 查看下载到的镜像 [root@WIND ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE nginx latest 605c77e624dd 8 weeks ago 141MB hello-world latest feb5d9fea6a5 5 months ago 13.3kB [root@WIND ~]#docker pull nginx:1.16.0 1.16.0: Pulling from library/nginx 9fc222b64b0a: Pull complete 30e9fc7d9c5b: Pull complete 4b3a8aeaa40e: Pull complete Digest: sha256:3e373fd5b8d41baeddc24be311c5c6929425c04cabf893b874ac09b72a798010 Status: Downloaded newer image for nginx:1.16.0 docker.io/library/nginx:1.16.0 指定nginx镜像版
docker system df 查看镜像/容器/数据卷所占的磁盘空间
[root@WIND ~]# docker system df TYPE TOTAL ACTIVE SIZE RECLAIMABLE Images 4 1 346.1MB 346.1MB (99%) Containers 5 0 0B 0B Local Volumes 0 0 0B 0B Build Cache 0 0 0B 0B
Containers查看历史运行过多少个镜像
[root@WIND ~]# docker ps
ConTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
我们docker ps看到一个正在运行的镜像都没，但是加-a参考就可以看到，确实是有5个
[root@WIND ~]# docker ps -a
ConTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
5edb0ed93c92 hello-world “/hello” about an hour ago Exited (0) about an hour ago cranky_noether
cd4154169336 hello-world “/hello” 5 hours ago Exited (0) 5 hours ago crazy_shtern
34ce13d1b457 hello-world “/hello” 6 hours ago Exited (0) 6 hours ago elegant_mclaren
269efecd4202 hello-world “/hello” 6 hours ago Exited (0) 6 hours ago happy_wescoff
1edfabfbc754 hello-world “/hello” 6 hours ago Exited (0) 6 hours ago hopeful_rosalind
[root@WIND ~]#
删除镜像
docker rmi 镜像名字:TAG
docker rmi IMAGEID1 IMAGEID2
删除镜像的2种方式
可以加-f参数把正在使用的镜像也删除
删除全部docker进行 docker rmi -f $(docker images -qa)
生产环境千万不要轻易用这个命令
-f是强制删除，把正在使用的镜像也删除掉
docker 虚悬镜像： 仓库名和标签都是(没有仓库名和标签)
