Gitops Training - python

app.py

from flask import Flask, jsonify, request
from flask_cors import CORS

app = Flask(__name__)
CORS(app)



@app.route('/ip', methods=["GET"])
def ip():
    pips= request.headers.get('X-Forwarded-For')
    pip = pips.split(",")
    return jsonify({'ip': pip[0]}), 200


@app.route('/api')
def api():
    twitter_handles = [
        "GianArb", 
        "ipedrazas", 
        "perezpardojc", 
        "gitirabassi", 
        "errordeveloper", 
        "LachlanEvenson",
        "Phisc0",
        "sublimino"
    ]
    return jsonify(results=twitter_handles)

@app.route('/')
def hello():
    return "Hello API!"

if __name__ == '__main__':
    app.run(debug=True, host='0.0.0.0')

flask.Dockerfile

#
#   Docker image for flask
#
FROM python:3.8.3-alpine as base

# Builder
FROM base as builder

RUN mkdir /install
WORKDIR /install
COPY requirements.txt /requirements.txt
RUN pip install --install-option="--prefix=/install" -r /requirements.txt

# App
FROM base as app
COPY --from=builder /install /usr/local

RUN \
    addgroup --system --gid 30000 user && \
    adduser --system --shell /sbin/nologin -u 30000 -G user user

WORKDIR /home/user
COPY . /home/user


# Unit test
FROM app as test

ENV GOSS_VERSION="v0.3.6"
USER root
RUN \
    set -x; \
    \
    apk add curl && \
    curl --fail -L "https://github.com/aelsabbahy/goss/releases/download/${GOSS_VERSION}/goss-linux-amd64" \
    -o /usr/local/bin/goss \
    && chmod +rx /usr/local/bin/goss

USER user
COPY goss-flask.yaml goss.yaml
RUN goss -g - validate < goss.yaml


# Metadata
FROM app as final

CMD ["gunicorn", "-w 4", "-b 0.0.0.0:8000", "app:app"]

ARG vcs_ref=unespecied
LABEL org.label-schema.name="Control Plane Flask image" \
      org.label-schema.description="Control Plane Base Flask image" \
      org.label-schema.build-date="${build_date}" \
      org.label-schema.vcs-url="https://github.com/controlplaneio/docker-base-images" \
      org.label-schema.vcs-ref="${vcs_ref}" \
      io.control-plane.ci-agent="circleci" \
      io.control-plane.test="goss-passed"

goss-flask.yaml

package:
  python:
    installed: false
port:
  tcp:8000:
    listening: false
    ip: []
user:
  user:
    exists: true
    uid: 30000
    gid: 30000
    groups:
    - user
    home: /home/user
    shell: /sbin/nologin
command:
  pip list:
    exit-status: 0
    stdout:
    - Package        Version
    - '-------------- -------'
    - aniso8601      8.0.0
    - click          7.1.2
    - Flask          1.1.2
    - Flask-Admin    1.5.6
    - flask-restplus 0.13.0
    - Flask-SSLify   0.1.5
    - gunicorn       19.10.0
    - itsdangerous   1.1.0
    - Jinja2         2.11.2
    - MarkupSafe     1.1.1
    - pip            20.1
    - pyrsistent     0.16.0
    - pytz           2020.1
    - setuptools     46.3.0
    - six            1.14.0
    - Werkzeug       1.0.1
    - wheel          0.34.2
    - WTForms        2.3.1
    stderr: []
    timeout: 10000

requirements.txt

Flask>=1.1.2,<1.2
flask-restplus>=0.13,<0.14
Flask-SSLify>=0.1.5,<0.2
Flask-Admin>=1.5.3,<1.6
gunicorn>=19,<20
flask-cors>=3.0.6,<3.1