add app

lvthillo · lvthillo · commit 65d6b8262ba1 · 2018-07-17T23:30:06.000+02:00
diff --git a/Dockerfile b/Dockerfile
@@ -0,0 +1,8 @@
+FROM python:3.6
+LABEL maintainer="lorenz.vanthillo@gmail.com"
+COPY . /app
+WORKDIR /app
+RUN pip install -r requirements.txt
+ENTRYPOINT ["python"]
+EXPOSE 5000
+CMD ["app/app.py"]
diff --git a/README.md b/README.md
@@ -1,2 +1,38 @@
 # python-flask-docker
 Basic Python Flask app in Docker which prints the hostname and IP of the container
+
+### Build application
+Build the Docker image manually by cloning the Git repo.
+```
+$ git clone https://github.com/lvthillo/python-flask-docker.git
+$ docker build -t lvthillo/python-flask-docker .
+```
+
+### Download precreated image
+You can also just download the existing image from [DockerHub](https://hub.docker.com/r/lvthillo/python-flask-docker/).
+```
+docker pull lvthillo/python-flask-docker
+```
+
+### Run the container
+Create a container from the image.
+```
+$ docker run --name my-container -d -p 5000:5000 lvthillo/python-flask-docker
+```
+
+Now visit http://localhost:5000 
+Example of expected output:
+```
+ The hostname of the container is 6095273a4e9b and its IP is 172.17.0.2. 
+```
+
+### Verify the running container
+Verify by checking the container ip and hostname (ID):
+```
+$ docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' my-container
+172.17.0.2
+$ docker inspect -f '{{ .Config.Hostname }}' my-container
+6095273a4e9b
+```
+
+
diff --git a/app/app.py b/app/app.py
@@ -0,0 +1,17 @@
+from flask import Flask,render_template
+import socket
+
+app = Flask(__name__)
+
+@app.route("/")
+def index():
+    try:
+        host_name = socket.gethostname()
+        host_ip = socket.gethostbyname(host_name)
+        return render_template('index.html', hostname=host_name, ip=host_ip)
+    except:
+        return render_template('error.html')
+
+
+if __name__ == "__main__":
+    app.run(debug=True,host='0.0.0.0')
diff --git a/app/templates/error.html b/app/templates/error.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Error page</title>
+</head>
+<body>
+    Can not print the IP address of the container
+</body>
+</html>
diff --git a/app/templates/index.html b/app/templates/index.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Index page</title>
+</head>
+<body>
+The hostname of the container is <b>{{ hostname }}</b> and its IP is <b>{{ ip }}</b>.
+</body>
+</html>
diff --git a/requirements.txt b/requirements.txt
@@ -0,0 +1 @@
+flask==1.0.2
