docker入门教程

1. docker安装

  请参考:[https://www.jianshu.com/p/665...]

2.制作docker镜像

2.1 准备测试程序docker_test.cpp

#include <stdio.h>
#include <unistd.h>
#include <string.h>
int main(int argc, char** args)
{
    FILE* pfile = fopen("docker_test.txt", "wb");
    if(NULL == pfile)
    {
        return 0;
    }
    char buf[50] = "hello, welcome to learn docker";
    while(1)
    {
        printf(buf);
        fwrite(buf, 1, strlen(buf), pfile);
        sleep(1);
    }
    return 0;
}

2.2 编写docker文件

FROM centos
RUN yum install -y gcc gcc-c++ make patch sudo
RUN mkdir /usr/src/docker_test
COPY docker_test.cpp /usr/src/docker_test
WORKDIR /usr/src/docker_test
RUN g++ -o test docker_test.cpp
CMD ["./test"]

2.3 编译

$sudo docker build -t docker-test:v1 .

2.4 运行docker镜像

$sudo docker images
REPOSITORY TAG  IMAGE ID        SIZE
docker-test v1  ba22adea3409    399MB
$sudo docker run -d docker-test:v1

##2.5 进入/退出docker

$ sudo docker ps
CONTAINER ID     IMAGE          COMMAND         a13f3b550314    docker-test:v1  "./test"
$ sudo docker exec -it f7fff670a3a4 /bin/bash
$ cd /usr/src/docker_test/
$ ls
docker_test.cpp  docker_test.txt  test
$exit