Niveditha/test airflow with python38 v1

.gitignore

@@ -21,3 +21,9 @@ Session.vim
 
 # sftp configuration file
 sftp-config.json
+
+# PyCharm junk
+.idea
+=======
+# Python
+__pycache__

LICENSE

@@ -0,0 +1,201 @@
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README.md

@@ -1,28 +1,36 @@
-## Airflow Dockerfile
+# docker-airflow
 
+This repository contains **Dockerfiles** for building Docker images containing
+[Airflow 2](https://github.com/apache/incubator-airflow) which are published to Google
+Container Registry in the `fathom-containers` project.
 
-This repository contains **Dockerfile** of [airflow](https://github.com/airbnb/airflow) for [Docker](https://www.docker.com/)'s [automated build](https://registry.hub.docker.com/u/puckel/docker-airflow/) published to the public [Docker Hub Registry](https://registry.hub.docker.com/).
+## Information
 
+-   Based on Python (3.6-slim) official Image [python:3.6-slim](https://hub.docker.com/_/python/)
+    and uses the official [Postgres](https://hub.docker.com/_/postgres/) as backend and
+    [Redis](https://hub.docker.com/_/redis/) as the queue.
 
-### Base Docker Image
+-   Install [Docker](https://www.docker.com/)
 
-* [debian:wheezy](https://registry.hub.docker.com/_/debian/)
+-   Uses the Airflow release from
+    [PYPI (Python Package Index)](https://pypi.python.org/pypi/apache-airflow)
 
+## Configuring Airflow
 
-### Installation
+It's possible to set any configuration value for Airflow from environment variables,
+which are used over values from the airflow.cfg.
 
-1. Install [Docker](https://www.docker.com/).
+The general rule is the environment variable should be named `AIRFLOW__<section>__<key>`
+, for example `AIRFLOW__CORE__SQL_ALCHEMY_CONN` sets the `sql_alchemy_conn`
+config option in the `[core]` section.
 
-2. Download [automated build](https://registry.hub.docker.com/u/puckel/docker-airflow/) from public [Docker Hub Registry](https://registry.hub.docker.com/): `docker pull puckel/docker-airflow`
+Check out the 
+[Airflow documentation](http://airflow.readthedocs.io/en/latest/howto/set-config.html#setting-configuration-options)
+for more details
 
-Alternatively, you can build an image from [Dockerfile](https://github.com/puckel/docker-airflow)
-
-### Usage
-
-
-```bash
-    docker run -d \
-        --name airflow \
-        -p 8080:8080
-        puckel/docker-airflow
-```
+You can also define connections via environment variables by prefixing them with
+`AIRFLOW_CONN_` - for example
+`AIRFLOW_CONN_POSTGRES_MASTER=postgres://user:password@localhost:5432/master`
+for a connection called "postgres_master". The value is parsed as a URI. This will 
+work for hooks etc, but won't show up in the "Ad-hoc Query" section unless an (empty)
+connection is also created in the DB.