MAC安装Docker Desktop

MAC上安装Docker Desktop可以网站下载安装，也可以通过brew安装。这里记录brew安装的命令：

brew cask install docker

安装完成后，创建Dockerfile

FROM nginx
RUN echo 'Hello this is mywebsite' > /usr/share/nginx/html/index.html

开启Goolge Cloud Container Registy权限：

gcloud auth configure-docker

创建Dockerfile：

from flask import Flask
from datetime import datetime
import socket

app = Flask(__name__)

@app.route("/")
def hello():
    now = datetime.now()
    html1 = str(socket.gethostname())
    html2 = now.strftime("%m/%d/%Y, %H:%M:%S")
    html = "<h1>Time: " + html2 + "\n" + "Hostname is: " + html1 + "</h1>\n"
    return html

if __name__ == "__main__":
  app.run(host='0.0.0.0', port=80)

安装列表requirements.txt：

Flask

程序代码app.py:

from flask import Flask
import socket

app = Flask(__name__)

@app.route("/")
def hello():
    html = socket.gethostname()
    return html

if __name__ == "__main__":
  app.run(host='0.0.0.0', port=80)

Build Docker Image并上传:

docker build ./ -t gcr.io/central-segment-217003/web-hostname:1.0
docker push gcr.io/central-segment-217003/web-hostname:1.0

用此docker image创建docker：

docker run -d -p 127.0.0.1:80:80 gcr.io/central-segment-217003/web-hostname:1.0
$ curl localhost
423fcf67c506

查看docker情况：

$docker ps
CONTAINER ID        IMAGE                                            COMMAND             CREATED             STATUS              PORTS                  NAMES
423fcf67c506        gcr.io/central-segment-217003/web-hostname:1.0   "python app.py"     41 seconds ago      Up 39 seconds       127.0.0.1:80->80/tcp   sweet_napier

和显示的hostname相同。