Package a Docker image so that your friends can load and open a container and output hello and world to the specified file every second,

Package a Docker image so that your friends can load and open a container and output hello and world to the specified file every second,

I. Two script codes

Dockerfile

1 FROM bash2 COPY . /usr/herui/3 WORKDIR /usr/herui/4 CMD [ "sh", "hello_world.sh" ]

Hello_world.sh

1 #!/bin/bash2 while true3 do4 echo 'hello world!' >> /usr/herui/hello_world.log5 sleep 16 done

 

Ii. package it into an image

1,

 1 [root@localhost herui]# docker build -t hello_world:1.01 2 "docker build" requires exactly 1 argument(s). 3 See 'docker build --help'. 4  5 Usage:  docker build [OPTIONS] PATH | URL | - 6  7 Build an image from a Dockerfile 8 [root@localhost herui]# docker build -t hello_world:1.01 . 9 Sending build context to Docker daemon  3.072kB10 Step 1/4 : FROM bash11  ---> 906f4bf24f0012 Step 2/4 : COPY . /usr/herui/13  ---> Using cache14  ---> ab38183c9bcb15 Step 3/4 : WORKDIR /usr/herui/16  ---> Using cache17  ---> 24442df0587c18 Step 4/4 : CMD sh hello_world.sh19  ---> Using cache20  ---> 9413de166e6f21 Successfully built 9413de166e6f22 Successfully tagged hello_world:1.01

Note that the packaging command must be executed under Dockerfile and hello_world.sh, And the last "." command is followed by the context path.

2. Check the image file list to see if it is successful.

1 [root@localhost herui]# docker images2 REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE3 hello_world         1.01                9413de166e6f        2 days ago          12.1MB

 

Save the three directories in the tar.gz format and check whether the packages in the current directory exist.

1 [root@localhost herui# docker save hello_world:1.01 | gzip > hello_world.tar.gz2 [root@localhost herui]# ls -lh hello_*3 -rw-r--r--. 1 root root   92 Aug 31 17:53 hello_world.sh4 -rw-r--r--. 1 root root 4.4M Sep  3 01:29 hello_world.tar.gz