获取镜像busybox

# sudo docker pull busybox
latest: Pulling from busybox
56ed16bd6310: Pull complete 
bc744c4ab376: Pull complete 
Digest: sha256:4a887a2326ec9e0fa90cce7b4764b0e627b5d6afcb81a3f73c85dc29cea00048
Status: Downloaded newer image for busybox:latest

查看本地镜像列表

# sudo docker images 
REPOSITORY          TAG                 IMAGE ID            CREATED             VIRTUAL SIZE
ubuntu              latest              7bd023c8937d        25 hours ago        122 MB
busybox             latest              bc744c4ab376        10 weeks ago        1.113 MB

查看镜像详细信息

# sudo docker inspect bc744c4ab376
[{
    "Architecture": "amd64",
    "Author": "",
    "Comment": "",
    ......

查找镜像

# sudo docker search ubuntu
NAME                              DESCRIPTION                                     STARS     OFFICIAL   AUTOMATED
ubuntu                            Ubuntu is a Debian-based Linux operating s...   3995      [OK]       
ubuntu-upstart                    Upstart is an event-based replacement for ...   63        [OK]       
rastasheep/ubuntu-sshd            Dockerized SSH service, built on top of of...   27                   [OK]

删除本地镜像

• rm Remove one or more containers
• rmi Remove one or more images

# sudo docker rmi bc744c4ab376
Error response from daemon: Conflict, cannot delete bc744c4ab376 because the container 18bf2972ebd8 is using it, use -f to force
FATA[0000] Error: failed to remove one or more images   

先删除依赖镜像

# sudo docker rm 18bf2972ebd8
18bf2972ebd8
# sudo docker rmi bc744c4ab376
Untagged: busybox:latest
Deleted: bc744c4ab376115cc45c610d53f529dd2d4249ae6b35e5d6e7a96e58863545aa
Deleted: 56ed16bd6310cca65920c653a9bb22de6b235990dcaa1742ff839867aed730e5

创建镜像

创建镜像有三种方法：

• 基于已有镜像的容器创建
• 基于本地模板导入
• 基于Dockerfile创建

基于已有镜像：使用docker commit命令

# sudo docker run -ti ubuntu:latest /bin/bash
root@9cc317a7ba54:/#

其中9cc317a7ba54为ubuntu运行中容器ID
-m --message = "" 提交消息
-a --authro = "" 作者信息

# sudo docker commit -m "Added a new dir /home/hqi" -a "hqi" 9cc317a7ba54 newbee_docker
8be5ada16b2d908640e018c3b31a2d43a7e5f12b575863dc840316300da39290

基于本地模板导入：推荐OpenVZ提供的模板

存入镜像

# sudo docker save -o ubuntu_0529.tar ubuntu:latest
# ls -l ubuntu_0529.tar
-rw-r--r-- 1 root root 127697408  5?.29 00:49 ubuntu_0529.tar

载入镜像（但是我载入后通过docker images没有查看到）

# sudo docker load < ./ubuntu_0529.tar