Init

.idea/.gitignore

+# Default ignored files
+/workspace.xml

.idea/inspectionProfiles/profiles_settings.xml

+<component name="InspectionProjectProfileManager">
+  <settings>
+    <option name="USE_PROJECT_PROFILE" value="false" />
+    <version value="1.0" />
+  </settings>
+</component>
\ No newline at end of file

.idea/misc.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="JavaScriptSettings">
+    <option name="languageLevel" value="ES6" />
+  </component>
+  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.7" project-jdk-type="Python SDK" />
+</project>
\ No newline at end of file

.idea/modules.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/py-counter.iml" filepath="$PROJECT_DIR$/.idea/py-counter.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file

.idea/py-counter.iml

+<?xml version="1.0" encoding="UTF-8"?>
+<module type="PYTHON_MODULE" version="4">
+  <component name="Flask">
+    <option name="enabled" value="true" />
+  </component>
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+  <component name="TemplatesService">
+    <option name="TEMPLATE_CONFIGURATION" value="Jinja2" />
+  </component>
+</module>
\ No newline at end of file

.idea/vcs.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file

README.md

+# Multi docker compose file sample
+
+## How to run?
+1. Create network:
+```docker network create some_network_name```
+
+2. Start redis service
+```docker-compose -f redis/docker-compose.yml up -d```
+
+3. Start app service
+```docker-compose -f redis/docker-compose.yml up -d```
\ No newline at end of file

app/Dockerfile

+FROM python:3.7-alpine
+
+WORKDIR /app
+
+COPY . /app
+
+RUN pip install -r requriements.txt
+
+EXPOSE 80
+
+CMD ["python", "app.py"]
\ No newline at end of file

app/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)

app/docker-compose.yml

+version: '3'
+services:
+  app:
+    build: .
+    ports:
+      - 80:80
+    networks:
+      - some_network_name
+networks:
+  some_network_name:
+    external: true
\ No newline at end of file

app/requriements.txt

+Click==7.0
+Flask==1.1.1
+itsdangerous==1.1.0
+Jinja2==2.10.1
+MarkupSafe==1.1.1
+redis==3.3.8
+Werkzeug==0.15.5

redis/docker-compose.yml

+version: '3'
+services:
+  redis:
+    image: redis:5.0.7
+    networks:
+      - some_network_name
+networks:
+  some_network_name:
+    external: true
\ No newline at end of file