基础镜像管理命令
从dockerhub查找镜像，以nginx为例
[root@node1 docker]# docker search nginx
NAME DESCRIPTION STARS OFFICIAL
nginx Official build of Nginx. 19631 [OK]
unit Official build of NGINX Unit: Universal Web … 21 [OK]
nginx/nginx-ingress NGINX and NGINX Plus Ingress Controllers fo… 88
nginxinc/nginx-unprivileged Unprivileged NGINX Dockerfiles 141
nginx/nginx-prometheus-exporter NGINX Prometheus Exporter for NGINX and NGIN… 36
nginxinc/nginx-s3-gateway Authenticating and caching gateway based on … 6
nginx/unit This repository is retired, use the Docker o… 64
nginx/nginx-ingress-operator NGINX Ingress Operator for NGINX and NGINX P… 2
nginxinc/amplify-agent NGINX Amplify Agent docker repository 1
nginx/nginx-quic-qns NGINX QUIC interop 1
nginxinc/ingress-demo Ingress Demo 4
nginxproxy/nginx-proxy Automated nginx proxy for Docker containers … 131
nginxproxy/acme-companion Automated ACME SSL certificate generation fo… 130
bitnami/nginx Bitnami nginx Docker Image 182
解释说明：
NAME：镜像仓库源的名称
DESCRIPTION ：镜像的描述
STARS：类似点赞，喜欢的意思
OFFICIAL：是否docker官方发布下载镜像
[root@node1 docker]# docker pull nginx:latest #latest表示最新版本
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
[root@node1 docker]# 把镜像做成离线压缩包（可拷贝到其他机器上）
[root@node1 docker]# docker save -o nginx.tar.gz nginx
[root@node1 docker]# ls
nginx.tar.gz
[root@node1 docker]#
删除镜像
root@node1 docker]# docker rmi nginx:latest
Untagged: nginx:latest
Deleted: sha256:605c77e624ddb75e6110f997c58876baa13f8754486b461117934b24a9dc3a85
Deleted: sha256:b625d8e29573fa369e799ca7c5df8b7a902126d2b7cbeb390af59e4b9e1210c5
Deleted: sha256:7850d382fb05e393e211067c5ca0aada2111fcbe550a90fed04d1c634bd31a14
Deleted: sha256:02b80ac2055edd757a996c3d554e6a8906fd3521e14d1227440afd5163a5f1c4
Deleted: sha256:b92aa5824592ecb46e6d169f8e694a99150ccef01a2aabea7b9c02356cdabe7c
Deleted: sha256:780238f18c540007376dd5e904f583896a69fe620876cabc06977a3af4ba4fb5
Deleted: sha256:2edcec3590a4ec7f40cf0743c15d78fb39d8326bc029073b41ef9727da6c851f
[root@node1 docker]#
解压离线压缩包
[root@node1 docker]# docker load -i nginx.tar.gz
2edcec3590a4: Loading layer [==================================================>] 83.86MB/83.86MB
e379e8aedd4d: Loading layer [==================================================>] 62MB/62MB
b8d6e692a25e: Loading layer [==================================================>] 3.072kB/3.072kB
f1db227348d0: Loading layer [==================================================>] 4.096kB/4.096kB
32ce5f6a5106: Loading layer [==================================================>] 3.584kB/3.584kB
d874fd2bc83b: Loading layer [==================================================>] 7.168kB/7.168kB
Loaded image: nginx:latest
[root@node1 docker]# 容器相关命令
1、以交互式方式启动容器，以centos镜像为例
[root@node1 docker]# docker run --name=hello -it centos /bin/bash
--name 容器名称
-i 交互式
-t 分配伪终端
centos 指定使用的镜像
/bin/bash 说明容器的shell类型为bash
运行报错，排查发现确实libseccomp依赖，安装依赖
再次运行成功，进入交互式界面
exit退出容器
2、以守护进程的方式启动容器
[root@node1 lib]# docker run --name=hello01 -td centos
# -d 在后台运行docker
3、查看正在运行的容器
[root@node1 lib]# docker ps
参数：
-a 查看所有容器，包括正在运行和退出的容器
4、停止容器
[root@node1 lib]# docker stop hello01
5、启动已经停止的容器
[root@node1 lib]# docker start hello01
6、删除容器
[root@node1 lib]# docker rm -f hello01
-f 强制删除
部署nginx服务
[root@node1 lib]# docker run --name nginx -p 80 -itd nginx
-p 把容器端口映射到物理机的一个随机端口，可通过80:80指定物理机映射端口
通过docker ps 查看到物理机的随机端口为32769，测试用浏览器访问
查看容器 配置文件，可以查看IP，镜像等配置信息
[root@node1 lib]#docker inspect nginx