Docker 镜像制作方法

Posted 2022-04-04 青衫解衣

​方法1:docker commit​

说明:从容器生成新镜像。

docker commit [OPTIONS] CONTAINER [REPOSITORY[:TAG]]

​用法​

####查看当前运行的容器####
[root@harbor <sub>]# docker ps
CONTAINER ID   IMAGE     COMMAND                  CREATED         STATUS         PORTS      NAMES
7377e020567a   redis     "docker-entrypoint.s…"   2 minutes ago   Up 2 minutes   6379/tcp   redis

#####在当前运行的容器redis的/tmp目录下创建1.txt文件
[root@harbor </sub>]# docker exec -it redis touch /tmp/1.txt

#####提交当前运行容器状态为新的docker 镜像redis:v1
[root@harbor <sub>]# docker commit redis redis:v1
sha256:cc6cf492f5953414156563ca122d7e1ef151bba3b4ffad103f586a050d08faba

######docker image中查看新生成的镜像
[root@harbor </sub>]# docker images  | grep redis
redis        v1        cc6cf492f595   14 seconds ago   113MB
redis        latest    7614ae9453d1   3 months ago     113MB

#####运行新的镜像并查看/tmp目录下1.txt文件
[root@harbor ~]# docker run -it redis:v1 ls /tmp/
1.txt

​方法2:docker build​

说明:使用Dockerfile文件自动生成docker 镜像。

​用法​

Dockerfile文件如下:

FROM centos:centos7.9.2009

COPY ./jdk-8u321-linux-x64.rpm /tmp/
RUN yum update -y \\
    && yum install telnet -y \\
    && cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime \\
    && yum install -y /tmp/jdk-8u321-linux-x64.rpm \\
    && rm -rf /tmp/jdk-8u321-linux-x64.rpm \\
    && yum clean all

构建docker镜像:

docker build --no-cache -t jdk:v6 .

查看生成的docker镜像:

[root@harbor ~]# docker images
REPOSITORY                                           TAG                      IMAGE ID            CREATED             SIZE
jdk                                                  v6                       4b2890f7fb4d        49 seconds ago      818MB