Merge pull request #1 from ProgrammingMuffin/create-flask-application

Create basic flask application

Author: ProgrammingMuffin

.gitignore

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+*/__pycache__

Dockerfile

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+FROM ubuntu:focal
+
+RUN apt update
+RUN apt -y install python3 pip mysql-client
+
+RUN mkdir /www
+RUN mkdir /www/app
+
+COPY ./ /www/app/
+
+RUN pip install -r /www/app/requirements.txt
+
+RUN ls /www/app
+
+ENTRYPOINT sh /www/app/docker-entrypoint.sh

alembic.ini

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+# A generic, single database configuration.
+
+[alembic]
+# path to migration scripts
+script_location = alembic/
+
+# template used to generate migration files
+# file_template = %%(rev)s_%%(slug)s
+
+# sys.path path, will be prepended to sys.path if present.
+# defaults to the current working directory.
+prepend_sys_path = .
+
+# timezone to use when rendering the date within the migration file
+# as well as the filename.
+# If specified, requires the python-dateutil library that can be
+# installed by adding `alembic[tz]` to the pip requirements
+# string value is passed to dateutil.tz.gettz()
+# leave blank for localtime
+# timezone =
+
+# max length of characters to apply to the
+# "slug" field
+# truncate_slug_length = 40
+
+# set to 'true' to run the environment during
+# the 'revision' command, regardless of autogenerate
+# revision_environment = false
+
+# set to 'true' to allow .pyc and .pyo files without
+# a source .py file to be detected as revisions in the
+# versions/ directory
+# sourceless = false
+
+# version location specification; This defaults
+# to alembic//versions.  When using multiple version
+# directories, initial revisions must be specified with --version-path.
+# The path separator used here should be the separator specified by "version_path_separator"
+# version_locations = %(here)s/bar:%(here)s/bat:alembic//versions
+
+# version path separator; As mentioned above, this is the character used to split
+# version_locations. Valid values are:
+#
+# version_path_separator = :
+# version_path_separator = ;
+# version_path_separator = space
+version_path_separator = os  # default: use os.pathsep
+
+# the output encoding used when revision files
+# are written from script.py.mako
+# output_encoding = utf-8
+
+sqlalchemy.url = mysql+pymysql://root:password@mysql-clusterip/taskmanager
+
+
+[post_write_hooks]
+# post_write_hooks defines scripts or Python functions that are run
+# on newly generated revision scripts.  See the documentation for further
+# detail and examples
+
+# format using "black" - use the console_scripts runner, against the "black" entrypoint
+# hooks = black
+# black.type = console_scripts
+# black.entrypoint = black
+# black.options = -l 79 REVISION_SCRIPT_FILENAME
+
+# Logging configuration
+[loggers]
+keys = root,sqlalchemy,alembic
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARN
+handlers = console
+qualname =
+
+[logger_sqlalchemy]
+level = WARN
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s
+datefmt = %H:%M:%S

alembic/README

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+Generic single-database configuration.

alembic/env.py

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+from logging.config import fileConfig
+
+from sqlalchemy import engine_from_config
+from sqlalchemy import pool
+
+from alembic import context
+
+# this is the Alembic Config object, which provides
+# access to the values within the .ini file in use.
+config = context.config
+
+# Interpret the config file for Python logging.
+# This line sets up loggers basically.
+fileConfig(config.config_file_name)
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+# from myapp import mymodel
+# target_metadata = mymodel.Base.metadata
+target_metadata = None
+
+# other values from the config, defined by the needs of env.py,
+# can be acquired:
+# my_important_option = config.get_main_option("my_important_option")
+# ... etc.
+
+
+def run_migrations_offline():
+    """Run migrations in 'offline' mode.
+
+    This configures the context with just a URL
+    and not an Engine, though an Engine is acceptable
+    here as well.  By skipping the Engine creation
+    we don't even need a DBAPI to be available.
+
+    Calls to context.execute() here emit the given string to the
+    script output.
+
+    """
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(
+        url=url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online():
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine
+    and associate a connection with the context.
+
+    """
+    connectable = engine_from_config(
+        config.get_section(config.config_ini_section),
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+
+    with connectable.connect() as connection:
+        context.configure(
+            connection=connection, target_metadata=target_metadata
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

alembic/script.py.mako

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+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision = ${repr(up_revision)}
+down_revision = ${repr(down_revision)}
+branch_labels = ${repr(branch_labels)}
+depends_on = ${repr(depends_on)}
+
+
+def upgrade():
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade():
+    ${downgrades if downgrades else "pass"}

alembic/versions/fb82c06d1fa2_create_lists_subsystem.py

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+"""create lists subsystem
+
+Revision ID: fb82c06d1fa2
+Revises: 
+Create Date: 2021-10-09 08:37:34.878611
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = 'fb82c06d1fa2'
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    op.create_table("lists",
+        sa.Column("id", sa.BIGINT, primary_key=True),
+        sa.Column("name", sa.Text, nullable=False),
+        sa.Column("recurring_deadline", sa.Time, nullable=False),
+        sa.Column("created_at", sa.DateTime, nullable=False),
+        sa.Column("modified_at", sa.DateTime, nullable=False)
+    )
+
+
+def downgrade():
+    op.drop_table("lists")
+

config.py

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+SQLALCHEMY_DATABASE_URI = 'mysql+pymysql:////root:password@mysql-clusterip/taskmanager'

deploy.sh

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+kubectl delete deployments taskmanager-deployment mysql-deployment
+
+minikube image rm taskmanager
+
+sudo docker build . -t taskmanager
+
+minikube image load taskmanager
+
+kubectl apply -f mysql-deployment.yaml
+
+sleep 25
+
+kubectl apply -f taskmanager-deployment.yaml

docker-entrypoint.sh

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+run_migration() {
+	cd /www/app
+	alembic upgrade head
+}
+
+run_taskmanager_application() {
+	python3 /www/app/main.py
+}
+
+run_migration
+run_taskmanager_application

docs/taskmanager-dbdiagram.drawio

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+<mxfile host="app.diagrams.net" modified="2021-10-04T18:50:34.385Z" agent="5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.71 Safari/537.36" etag="2aQIa0IshziU_Q4f-3TO" version="15.4.1" type="device"><diagram id="R2lEEEUBdFMjLlhIrx00" name="Page-1">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</diagram></mxfile>

lists/__init__.py

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+from main import db
+import flask_sqlalchemy as sa
+
+class List(db.Model):
+    ''' This class represents a list '''
+    

lists/models.py

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+from flask import Blueprint
+
+
+lists = Blueprint("list_controller", __name__)
+
+@lists.route("", methods=["POST"])
+def createList():
+    return "created a list"
+

lists/views.py

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+from flask import Flask
+from flask_sqlalchemy import SQLAlchemy
+import os
+from lists.views import lists
+
+
+app = Flask(__name__)
+app.config.from_pyfile(os.path.join('.', 'config.py'))
+db = SQLAlchemy(app)
+
+app.register_blueprint(lists, url_prefix="/lists")
+
+if __name__=='__main__':
+    app.run(host='0.0.0.0', port=5000, debug=True)
+

main.py

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+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: mysql-deployment
+spec:
+  selector:
+    matchLabels:
+      database: mysql
+  replicas: 1 
+  template:
+    metadata:
+      name: mysql
+      labels:
+        database: mysql
+    spec:
+      containers:
+      - name: mysql
+        image: mysql:8.0
+        ports:
+        - containerPort: 3306
+        env:
+          - name: MYSQL_ROOT_PASSWORD
+            value: password
+          - name: MYSQL_DATABASE
+            value: taskmanager
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: mysql-clusterip
+spec:
+  selector:
+    database: mysql
+  ports:
+    - port: 3306
+      targetPort: 3306
+  type: ClusterIP
+---

mysql-deployment.yaml

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+Flask == 2.0.1
+Flask_SQLAlchemy == 2.5.1
+PyMySQL == 1.0.2
+alembic == 1.7.4
+cryptography == 35.0.0