通过dockerfile build一个base image，在上面运行一个c程序
首先
1、创建一个目录。
2、然后创建一个c写的小程序，并且gcc编译好。
3、创建一个Dockerfile
FROM scratch #scrath表示运行在内核之上 ADD soeasy2 / #增加文件 CMD ["/soeasy2"]#运行程序
4、build image
5、运行image
[root@localhost docker_test]# ls Dockerfile soeasy2 soeasy.c soeasy.sh [root@localhost docker_test]# vim Dockerfile [root@localhost docker_test]# docker build -t bigni/test1 . #-t表示tag 最后的点号，表示在当前目录寻找Dockerfile Sending build context to Docker daemon 865.8kB Step 1/3 : FROM scratch ---> Step 2/3 : ADD soeasy2 / ---> 3ec8199c2855 Step 3/3 : CMD ["/soeasy2"] ---> Running in 7fcaf3239425 Removing intermediate container 7fcaf3239425 ---> f5620b92331c Successfully built f5620b92331c Successfully tagged bigni/test1:latest [root@localhost docker_test]# docker image ls REPOSITORY TAG IMAGE ID CREATED SIZE bigni/test1 latest f5620b92331c 12 seconds ago 861kB ubuntu 14.04 2c5e00d77a67 7 weeks ago 188MB centos latest 9f38484d220f 3 months ago 202MB hello-world latest fce289e99eb9 6 months ago 1.84kB [root@localhost docker_test]# docker run f5620b92331c #运行image docker so easy [root@localhost docker_test]# cat Dockerfile FROM scratch ADD soeasy2 / CMD ["/soeasy2"] [root@localhost docker_test]# cat soeasy.c #include<stdio.h> int main() { printf("docker so easy "); } [root@localhost docker_test]#
把程序改成shell脚本，然后还是在linux kernel上构建base image，结果程序运行不起来，改成在centos image上构建，则运行成功。
[root@localhost docker_test]# vim soeasy.sh [root@localhost docker_test]# cat soeasy.sh #!/bin/bash echo "docker so easy !" [root@localhost docker_test]# vim Dockerfile [root@localhost docker_test]# cat Dockerfile FROM scratch ADD soeasy.sh / CMD ["/soeasy.sh"] [root@localhost docker_test]# docker build -t bigni/test2 . Sending build context to Docker daemon 865.8kB Step 1/3 : FROM scratch ---> Step 2/3 : ADD soeasy.sh / ---> 93d27c3e1b5b Step 3/3 : CMD ["/soeasy.sh"] ---> Running in 4af6bd362099 Removing intermediate container 4af6bd362099 ---> e2b5b08cc31c Successfully built e2b5b08cc31c Successfully tagged bigni/test2:latest [root@localhost docker_test]# docker image ls REPOSITORY TAG IMAGE ID CREATED SIZE bigni/test2 latest e2b5b08cc31c About a minute ago 36B bigni/test1 latest f5620b92331c 18 minutes ago 861kB ubuntu 14.04 2c5e00d77a67 7 weeks ago 188MB centos latest 9f38484d220f 3 months ago 202MB hello-world latest fce289e99eb9 6 months ago 1.84kB [root@localhost docker_test]# docker run e2b5b08cc31c #运行image standard_init_linux.go:211: exec user process caused "no such file or directory" [root@localhost docker_test]# vim Dockerfile [root@localhost docker_test]# cat Dockerfile FROM centos #改成centos ADD soeasy.sh / CMD ["/soeasy.sh"] [root@localhost docker_test]# docker build -t bigni/test3 . Sending build context to Docker daemon 865.8kB Step 1/3 : FROM centos ---> 9f38484d220f Step 2/3 : ADD soeasy.sh / ---> 9ae6ad56171a Step 3/3 : CMD ["/soeasy.sh"] ---> Running in b53205a3eb75 Removing intermediate container b53205a3eb75 ---> cfbfd0a29d1c Successfully built cfbfd0a29d1c Successfully tagged bigni/test3:latest [root@localhost docker_test]# docker image ls REPOSITORY TAG IMAGE ID CREATED SIZE bigni/test3 latest cfbfd0a29d1c 13 seconds ago 202MB bigni/test2 latest e2b5b08cc31c 5 minutes ago 36B bigni/test1 latest f5620b92331c 22 minutes ago 861kB ubuntu 14.04 2c5e00d77a67 7 weeks ago 188MB centos latest 9f38484d220f 3 months ago 202MB hello-world latest fce289e99eb9 6 months ago 1.84kB [root@localhost docker_test]# docker run cfbfd0a29d1c docker so easy ! [root@localhost docker_test]#