使用Dockerfile实现容器内部服务随容器自启动的方法

# 下载pythonsudo docker pull python:3.8.2# 创建python容器sudo docker run -itd --name mypython python:3.8.2# 进入mypythonsudo docker exec -it mypython /bin/bash# 安装flask和gunicornpip install flaskpip install gunicorn

touch app.py

from flask import Flaskapp = Flask(__name__)@app.route("/")def hello():    return "Hello World"

sudo docker cp app.py mypython:/home/myflask

touch start_flask.sh

#!/bin/bash## Program:#       mypython flask# History#       2022-06-08 mason## 进入目录cd /home/myflask# 执行程序gunicorn -w 4 -b 0.0.0.0:5000 app:app

sudo docker cp start_flask.sh mypython:/home/myflask

# docker commit -m "说明" -a "作者" 容器名 镜像名:版本号sudo docker commit -m "my python " -a "mason" mypython mypython:v1.0# 查看镜像列表sudo docker images# 返回结果mypython                             v1.0                           875738200451   9 seconds ago   945MB

mkdir mypython-v1.0-dockerfile

# 进入目录cd mypython-v1.0-dockerfile# 创建文件touch Dockerfile

# 设置镜像FROM mypython:v1.0# 设置作者MAINTAINER mason# 开放5000端口EXPOSE 5000# 执行命令CMD ["sh", "/home/myflask/start_flask.sh"]

sudo docker build -t mypython:v2.0 mypython-v1.0-dockerfile/

# 创建容器sudo docker run -itd --name mytest -p 5000:5000 mypython:v2.0# 查看mytest的日志信息 sudo docker logs -f mytest

# 创建目录sudo mkdir mypython-1.0# 进入mypython-1.0cd mypython-1.0# 创建myflask目录sudo mkdir myflask

from flask import Flaskapp = Flask(__name__)@app.route("/")def hello():    return "Hello World"

#!/bin/bash## Program:#       mypython flask# History#       2022-06-08 mason## 进入目录cd /home/myflask# 执行程序gunicorn -w 4 -b 0.0.0.0:5000 app:app

# 设置镜像FROM python:3.8.2# 作者MAINTAINER Maon# 在容器中安装相关的环境RUN pip install flaskRUN pip install gunicorn# 设置工作目录WORKDIR /home# 复制文件，注意myflask目录要与Dockerfile在同一个目录# COPY会将myflask目录下的文件，全部拷贝到/home/myflask目录下COPY myflask /home/myflask# 开放端口5000EXPOSE 5000# 执行命令CMD ["sh", "/home/myflask/start_flask.sh"]

# 进入mypython-1.0目录cd mypython-1.0# 执行文件，注意后面的"."sudo docker build -t mypython:1.0 .# 执行过程如下Sending build context to Docker daemon  4.608kBStep 1/8 : FROM python:3.8.2 ---> 4f7cd4269fa9Step 2/8 : MAINTAINER Maon ---> Running in 01bd71948685Removing intermediate container 01bd71948685 ---> ddae7ce9a68dStep 3/8 : RUN pip install flask ---> Running in 58f3fcfe573cCollecting flask  Downloading Flask-2.1.2-py3-none-any.whl (95 kB)Collecting Jinja2>=3.0  Downloading Jinja2-3.1.2-py3-none-any.whl (133 kB)Collecting importlib-metadata>=3.6.0; python_version < "3.10"  Downloading importlib_metadata-4.11.4-py3-none-any.whl (18 kB)Collecting click>=8.0  Downloading click-8.1.3-py3-none-any.whl (96 kB)Collecting itsdangerous>=2.0  Downloading itsdangerous-2.1.2-py3-none-any.whl (15 kB)Collecting Werkzeug>=2.0  Downloading Werkzeug-2.1.2-py3-none-any.whl (224 kB)Collecting MarkupSafe>=2.0  Downloading MarkupSafe-2.1.1-cp38-cp38-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (25 kB)Collecting zipp>=0.5  Downloading zipp-3.8.0-py3-none-any.whl (5.4 kB)Installing collected packages: MarkupSafe, Jinja2, zipp, importlib-metadata, click, itsdangerous, Werkzeug, flaskSuccessfully installed Jinja2-3.1.2 MarkupSafe-2.1.1 Werkzeug-2.1.2 click-8.1.3 flask-2.1.2 importlib-metadata-4.11.4 itsdangerous-2.1.2 zipp-3.8.0WARNING: You are using pip version 20.1; however, version 22.1.2 is available.You should consider upgrading via the '/usr/local/bin/python -m pip install --upgrade pip' command.Removing intermediate container 58f3fcfe573c ---> a22c9de6e3d5Step 4/8 : RUN pip install gunicorn ---> Running in 5b635d18e39bCollecting gunicorn  Downloading gunicorn-20.1.0-py3-none-any.whl (79 kB)Requirement already satisfied: setuptools>=3.0 in /usr/local/lib/python3.8/site-packages (from gunicorn) (46.1.3)Installing collected packages: gunicornSuccessfully installed gunicorn-20.1.0WARNING: You are using pip version 20.1; however, version 22.1.2 is available.You should consider upgrading via the '/usr/local/bin/python -m pip install --upgrade pip' command.Removing intermediate container 5b635d18e39b ---> 8afabe6c3a62Step 5/8 : WORKDIR /home ---> Running in 45040c10af7cRemoving intermediate container 45040c10af7c ---> 15ef04626c92Step 6/8 : COPY myflask /home ---> b6736b08b1e3Step 7/8 : EXPOSE 5000 ---> Running in 0835fe7f5809Removing intermediate container 0835fe7f5809 ---> ebd8bd33c8dcStep 8/8 : CMD ["sh", "/home/myflask/start_flask.sh"] ---> Running in e1f867903175Removing intermediate container e1f867903175 ---> 8c1b7d276dbbSuccessfully built 8c1b7d276dbbSuccessfully tagged mypython:1.0

# 创建容器sudo docker run -itd --name mytest1.0 -p 5000:5000 mypython:1.0# 查看日志sudo docker logs -f mytest1.0