Python Flask app deployed to OPenShift using Wercker CI
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This talk will show you how to create a really simple Flask API application. Keep its source code on Github and have wercker CI to automatically deploy successful commits to an OpenShift application CODE on github: https://github.com/rochacbruno/flask-openshift-wercker
})
if __name__ == "__main__":
api.run(debug=True)](https://image.slidesharecdn.com/pythonflaskonopenshiftdeployedbywerckerci-150822152715-lva1-app6891/85/Python-Flask-app-deployed-to-OPenShift-using-Wercker-CI-7-320.jpg)
})
# Break the tests!!!
return jsonify({"result": "error"})](https://image.slidesharecdn.com/pythonflaskonopenshiftdeployedbywerckerci-150822152715-lva1-app6891/85/Python-Flask-app-deployed-to-OPenShift-using-Wercker-CI-33-320.jpg)
})
$ git commit -m"Fixing the tests!!!"
$ git push -u origin master](https://image.slidesharecdn.com/pythonflaskonopenshiftdeployedbywerckerci-150822152715-lva1-app6891/85/Python-Flask-app-deployed-to-OPenShift-using-Wercker-CI-39-320.jpg)
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Python Flask app deployed to OPenShift using Wercker CI
- 2. Python & Flask on OpenShift deployed by wercker CI
- 3. 1. Flask creating an API 2. Github and webhooks 3. OpenShift what is and how it works w/ Python 4. Wercker CI and deployment targets
- 4. Objective: This talk will show you how to create a really simple Flask API application. Keep its source code on Github and have wercker CI to automatically deploy successful commits to an OpenShift application.
- 5. pip install -r requirements.txt # The Flask Framework flask # A helper to run wsgi apps on OPenShift shiftpy # Test runner pytest pytest-flask
- 6. '/calc/<string:op>/<int:number>/<int:other>' "sum", "sub", "mul", "div" $ python api.py - running on localhost:5000
- 7. api.py from flask import Flask, jsonify api = Flask(__name__) @api.route('/calc/<string:op>/<int:number>/<int:other>') def calc(op, number, other): operations = {"sum": lambda a, b: a + b, "mul": lambda a, b: a * b, "sub": lambda a, b: a - b, "div": lambda a, b: a / b} return jsonify({"result": operations[op](number, other)}) if __name__ == "__main__": api.run(debug=True)
- 8. tests.py import pytest from flask import jsonify from api import calc, api @pytest.fixture def app(): return api def test_sum(app): assert calc('sum', 1, 2).data == jsonify({'result': 3}).data def test_mul(app): assert calc('mul', 5, 3).data == jsonify({'result': 15}).data def test_sub(app): assert calc('sub', 10, 5).data == jsonify({'result': 5}).data def test_div(app): assert calc('div', 10, 2).data == jsonify({'result': 5}).data
- 9. py.test tests.py ====== test session starts ======= plugins: flask collected 4 items tests.py .... ==== 4 passed in 0.13 seconds ====
- 10. STEP 1: Create a github repository
- 11. Push to github: $ ls api_project .. api.py tests.py requirements.txt $ git init $ git remote add origin https://github.com/username/repo $ git commit -am"first commit" $ git push -u origin master
- 12. DEPLOY: $ ssh [email protected] $ sudo apt-get install <all_deps> $ git clone https://github.com/repo $ # run tests on production environment $ # setup paths and virtualenv $ # setup webserver $ # setup firewall
- 13. DEPLOY IN 1997: $ ssh [email protected] $ sudo apt-get install <all_deps> $ git clone https://github.com/repo $ # run tests on production environment $ # setup paths and virtualenv $ # setup webserver $ # setup firewall
- 16. wercker.yml box: wercker/python build: steps: - virtualenv: name: My virtualenv install_wheel: false - script: name: Install main requirements code: pip install -r requirements.txt - script: name: Run Tests code: py.test tests.py
- 18. Add wercker to project: $ git add wercker.yml $ git commit -m"added wercker CI" $ git push -u origin master
- 20. wsgi.py or app.py from app import app from shiftpy.wsgi_utils import envify app = application = envify(app)
- 21. .openshift/action_hooks/deploy #!/bin/bash source ${OPENSHIFT_PYTHON_DIR}virtenv/bin/activate cd $OPENSHIFT_REPO_DIR echo "installing requirements" pip install -r requirements.txt --upgrade
- 22. Add OpenShift to project: $ git add wsgi.py $ git add .openshift $ git commit -m"added openshift" $ git push -u origin master
- 26. box: wercker/python build: steps: - virtualenv: name: My virtualenv install_wheel: false - script: name: Install main requirements code: pip install -r requirements.txt - script: name: Run Tests code: py.test tests.py deploy: steps: - script: name: production code: fab -R prod_server deploy Custom Deploy Target - fabric, ansible, chef, puppet etc
- 27. DEPLOY TO
- 30. seunome
- 33. Lets break the tests @api.route('/calc/<string:op>/<int:number>/<int:other>') def calc(op, number, other): operations = {"sum": lambda a, b: a + b, "mul": lambda a, b: a * b, "sub": lambda a, b: a - b, "div": lambda a, b: a / b} # return jsonify({"result": operations[op](number, other)}) # Break the tests!!! return jsonify({"result": "error"})
- 34. $ git commit -m"Breaking the tests!!!" $ git push -u origin master
- 39. Fix it! @api.route('/calc/<string:op>/<int:number>/<int:other>') def calc(op, number, other): operations = {"sum": lambda a, b: a + b, "mul": lambda a, b: a * b, "sub": lambda a, b: a - b, "div": lambda a, b: a / b} return jsonify({"result": operations[op](number, other)}) $ git commit -m"Fixing the tests!!!" $ git push -u origin master