What is Dockerfile: Dockerfile similar script that we've learned, we've learned will achieve out of the mirror above docker, using an automated way. Dockerfile role:
1, find a mirror: ubuntu
2, create a container: docker run ubuntu
3, into the container: docker exec -it container command
4, operation: Configuration applications ....
5, construct a new image: docker commit
Dockerfile use guidelines:
1 large: the first letter must be uppercase D
2, empty: as far as possible Dockerfile in an empty directory.
3, single-: each container has only one possible function.
4, less: command execution, the better.
Dockerfile divided into four parts:
Mirroring the basis of information come from?
Maintainer information Who am I?
Mirroring operation instructions how to do it?
Hey instruction execution when the container starts! ! !
Dockerfile contents of the file:
The first line annotations
Command (uppercase) parameters
Dockerfile use the command:
[Python]
plain text view Copy the code
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#构建镜像命令格式：
docker build
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t [镜像名]:[版本号][Dockerfile所在目录]
#构建样例：
docker build
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t nginx:v0.
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/
opt
/
dockerfile
/
nginx
/
#参数详解：
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t 指定构建后的镜像信息，
/
opt
/
dockerfile
/
nginx
/
则代表Dockerfile存放位置，如果是当前目录，则用 .(点)表示
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