1.创建空目录
$ cd /home/xm6f/dev $ mkdir myapp $ cd myapp/
2.vim Dockerfile，内容如下：
## 一个基础的 python 运行环境 FROM python ## 设置工作目录 WORKDIR /app ## 将当前系统文件夹内容复制到容器的 app 目录 ADD . /app ## 安装必要的依赖包 RUN pip install -r softwares.txt ## 开放端口，供容器外访问 EXPOSE 80 EXPOSE 3088 EXPOSE 8080 EXPOSE 8066 ## 定义环境变量 ENV NAME HELLO ## 运行命令 CMD ["python","app.py"]
3.安装依赖
vim softwares.txt，内容如下：
Flask Redis
4.vim app.py，内容如下：
from flask import Flask
from redis import Redis, RedisError
import os
import socket
# Connect to Redis
redis = Redis(host="redis", db=0, socket_connect_timeout=2, socket_timeout=2)
app = Flask(__name__)
@app.route("/")
def hello():
try:
visits = redis.incr("counter")
except RedisError:
visits = "<i>cannot connect to Redis, counter disabled</i>"
html = "<h3>Hello {name}!</h3>" \
"<b>Hostname:</b> {hostname}<br/>" \
"<b>Visits:</b> {visits}"
return html.format(name=os.getenv("NAME", "world"), hostname=socket.gethostname(), visits=visits)
if __name__ == "__main__":
app.run(host='0.0.0.0', port=80)
5.编译
$ docker build -t myfirstapp .
6.查看新生成了一个image
$ docker images REPOSITORY TAG IMAGE ID CREATED SIZE myfirstapp latest 01ea1129a831 2 hours ago 699MB
7.启动image
$ docker run -p 4000:80 myfirstapp
也可以放在后台运行:
$ docker run -d -p 4000:80 myfirstapp
8.访问服务
# curl http://localhost:4000 <h3>Hello world!</h3><b>Hostname:</b> a6655d0d7e74<br/><b>Visits:</b> <i>cannot connect to Redis, counter disabled</i>
或者浏览器访问服务：http://192.168.1.160:4000
9.查看当前运行的镜像
$ docker ps CONTAINER ID MAGE COMMAND CREATED STATUS PORTS NAMES 2db45cab2bb4 myfirstapp "python app.py" 2 minutes ago Up 2 minutes 0.0.0.0:4000->80/tcp elastic_wilson
10.停止镜像
$ docker stop 2db45cab2bb4
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
