Docker compose with simple redis 5 stack provided

.gitignore

@@ -5,3 +5,4 @@
 *pip-selfcheck.json
 *Python
 *__pycache__/
+chat-env

Dockerfile

@@ -0,0 +1,8 @@
+FROM python:3.9
+WORKDIR /app
+COPY app.py /app/
+
+COPY requirements.txt  /app/
+RUN pip install -r requirements.txt
+
+CMD cd /app/ && gunicorn  --worker-class=gevent -b 0.0.0.0:8000 -t 99999 app:app

README.md

@@ -1,9 +1,20 @@
+- [Chat](#chat)
+  - [Installation](#installation)
+  - [Running the app](#running-the-app)
+    - [Container based](#container-based)
+    - [Dev way](#dev-way)
+
+# Chat
 A primitive chat app created to experiment with Flask, Redis, Gevent & Server-Sent Events.
 
-## installation
+## Installation
     pip install flask redis gevent gunicorn
 
-## running the app
+## Running the app
+### Container based
+    docker-compose up
+### Dev way
     start the redis server
     redis-server
-    gunicorn --debug --worker-class=gevent -t 99999 app:app
+    REDIS_SERVER_NAME=localhost gunicorn --debug --worker-class=gevent -t 99999 app:app
+

app.py

@@ -3,11 +3,13 @@
 import flask
 import redis
 
+import os
 
 app = flask.Flask(__name__)
-app.secret_key = 'asdf'
-red = redis.StrictRedis()
-
+app.secret_key = 'docker-powered-chat'
+red = redis.StrictRedis(host=os.environ["REDIS_SERVER_NAME"])
+print("Connected servers so far", red.get("CONNECTED_SERVERS"))
+red.incr("CONNECTED_SERVERS")
 
 def event_stream():
     pubsub = red.pubsub()

docker-compose.yml

@@ -0,0 +1,17 @@
+version: '2'
+
+services:
+  chat_web:
+    image: redis_chat:0.0.1
+    build:
+      context: .
+    ports:
+      - 8000:8000
+    depends_on:
+      - chat_redis_server
+    environment:
+      - REDIS_SERVER_NAME=chat_redis_server
+  chat_redis_server:
+    image: redis:5
+    ports:
+      - 6379:6379

requirements.txt

@@ -0,0 +1,12 @@
+click==7.1.2
+Flask==1.1.2
+gevent==20.12.1
+greenlet==1.0.0
+gunicorn==20.0.4
+itsdangerous==1.1.0
+Jinja2==2.11.2
+MarkupSafe==1.1.1
+redis==3.5.3
+Werkzeug==1.0.1
+zope.event==4.5.0
+zope.interface==5.2.0