test18-05-14_05-27_app.py

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)

test18-05-14_05-27_Dockerfile

# Use an official Python runtime as a parent image
FROM python:2.7-slim

# Set the working directory to /app
WORKDIR /app

# Copy the current directory contents into the container at /app
ADD . /app

# Install any needed packages specified in requirements.txt
RUN pip install --trusted-host pypi.python.org -r requirements.txt

# Make port 80 available to the world outside this container
EXPOSE 80

# Define environment variable
ENV NAME World

# Run app.py when the container launches
CMD ["python", "app.py"]

test18-05-14_05-27_requirements.txt

Flask
Redis

docker run -p 4001:80 --name SOMENAME friendlyhello

http://localhost:4001/
Hello World!
Hostname: d44577fc5295
Visits: cannot connect to Redis, counter disabled

C:\fre\private\docker\test18-05-14_05-27>docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
friendlyhello latest 7d4d1e0f78e6 5 hours ago 151MB

C:\fre\private\docker\test18-05-14_05-27>docker stop 7d4d1e0f78e6
Error response from daemon: No such container: 7d4d1e0f78e6

C:\fre\private\docker\test18-05-14_05-27>docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
friendlyhello latest 7d4d1e0f78e6 5 hours ago 151MB

http://localhost:4001/
not found

C:\fre\private\docker\test18-05-14_05-27>docker rm -f SOMENAME
SOMENAME

C:\fre\private\docker\test18-05-14_05-27>docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
friendlyhello latest 7d4d1e0f78e6 5 hours ago 151MB

C:\fre\private\docker\test18-05-14_05-27>docker rm -f friendlyhello
Error: No such container: friendlyhello

C:\fre\private\docker\test18-05-14_05-27>docker rm -f SOMENAME
Error: No such container: SOMENAME

C:\fre\private\docker\test18-05-14_05-27>docker rm -f 7d4d1e0f78e6
Error: No such container: 7d4d1e0f78e6

C:\fre\private\docker\test18-05-14_05-27>docker rm -f d44577fc5295
Error: No such container: d44577fc5295

C:\fre\private\docker\test18-05-14_05-27>docker ps -a
CONTAINER ID IMAGE COMMAND CREATED
STATUS PORTS NAMES
8e008ebf3ad7 friendlyhello "python app.py" 5 hours ago
Up 5 hours 0.0.0.0:4000->80/tcp eloquent_bhaskara

docker run -p 4001:80 --name SOMENAME friendlyhello

http://localhost:4001/
Hello World!
Hostname: d44577fc5295

C:\fre\private\docker\test18-05-14_05-27>docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
friendlyhello latest 7d4d1e0f78e6 5 hours ago 151MB

C:\fre\private\docker\test18-05-14_05-27>docker stop 7d4d1e0f78e6
Error response from daemon: No such container: 7d4d1e0f78e6

C:\fre\private\docker\test18-05-14_05-27>docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
friendlyhello latest 7d4d1e0f78e6 5 hours ago 151MB

http://localhost:4001/
not found

C:\fre\private\docker\test18-05-14_05-27>docker rm -f SOMENAME
SOMENAME

C:\fre\private\docker\test18-05-14_05-27>docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
friendlyhello latest 7d4d1e0f78e6 5 hours ago 151MB

C:\fre\private\docker\test18-05-14_05-27>docker rm -f friendlyhello
Error: No such container: friendlyhello

C:\fre\private\docker\test18-05-14_05-27>docker rm -f SOMENAME
Error: No such container: SOMENAME

C:\fre\private\docker\test18-05-14_05-27>docker rm -f 7d4d1e0f78e6
Error: No such container: 7d4d1e0f78e6

C:\fre\private\docker\test18-05-14_05-27>docker rm -f d44577fc5295
Error: No such container: d44577fc5295

docker run -p 4001:80 --name SOMENAME friendlyhello

http://localhost:4001/
Hello World!
Hostname: d44577fc5295

C:\fre\private\docker\test18-05-14_05-27>docker ps -a
CONTAINER ID IMAGE COMMAND CREATED
STATUS PORTS NAMES
ad4476db26bc friendlyhello "python app.py" About a minute ago Up About a minute 0.0.0.0:4001->80/tcp SOMENAME

docker run -p 4001:80 --name SOMENAME friendlyhello

http://localhost:4001/
Hello World!
Hostname: d44577fc5295

C:\fre\private\docker\test18-05-14_05-27>docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
friendlyhello latest 7d4d1e0f78e6 5 hours ago 151MB

C:\fre\private\docker\test18-05-14_05-27>docker stop 7d4d1e0f78e6
Error response from daemon: No such container: 7d4d1e0f78e6

C:\fre\private\docker\test18-05-14_05-27>docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
friendlyhello latest 7d4d1e0f78e6 5 hours ago 151MB

http://localhost:4001/
not found

C:\fre\private\docker\test18-05-14_05-27>docker rm -f SOMENAME
SOMENAME

C:\fre\private\docker\test18-05-14_05-27>docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
friendlyhello latest 7d4d1e0f78e6 5 hours ago 151MB

C:\fre\private\docker\test18-05-14_05-27>docker rm -f friendlyhello
Error: No such container: friendlyhello

C:\fre\private\docker\test18-05-14_05-27>docker rm -f SOMENAME
Error: No such container: SOMENAME

C:\fre\private\docker\test18-05-14_05-27>docker rm -f 7d4d1e0f78e6
Error: No such container: 7d4d1e0f78e6

C:\fre\private\docker\test18-05-14_05-27>docker rm -f d44577fc5295
Error: No such container: d44577fc5295

docker run -p 4001:80 --name SOMENAME friendlyhello

http://localhost:4001/
Hello World!
Hostname: d44577fc5295

C:\fre\private\docker\test18-05-14_05-27>docker ps -a
CONTAINER ID IMAGE COMMAND CREATED
STATUS PORTS NAMES
ad4476db26bc friendlyhello "python app.py" About a minute ago Up About a minute 0.0.0.0:4001->80/tcp SOMENAME