afctl

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afctl helps to manage and deploy Apache Airflow projects faster and smoother.

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# afctl

The proposed CLI tool is authored to make creating and deployment of Apache Airflow (https://airflow.apache.org/) projects faster and smoother. 
As of now, there is no tool out there that can empower the user to create a boilerplate code structure for airflow 
projects and make development + deployment of projects seamless.

## Requirements
* Python 3.5+
* Docker

## Getting Started

### 1. Installation

Create a new python virtualenv. You can use the following command. 
```bash
python3 -m venv <name>
```
Activate your virtualenv 
```bash
source /path_to_venv/bin/activate
```

```bash
pip3 install afctl
```

### 2. Initialize a new afctl project. 
The project is created in your present working directory. Along with this a configuration file with the same name is 
generated in **/home/.afctl_configs** directory.

```bash
afctl init <name of the project>
```
Eg.
```bash
afctl init project_demo
```
* The following directory structure will be generated
```bash
.
├── deployments
│   └── project_demo-docker-compose.yml
├── migrations
├── plugins
├── project_demo
│   ├── commons
│   └── dags
├── requirements.txt
└── tests
```

If you already have a git repository and want to turn it into an afctl project.
Run the following command :-
```bash
afctl init .
```

### 3. Add a new module in the project.

```bash
afctl generate module -n <name of the module>
```

The following directory structure will be generated :

```bash
afctl generate module -n first_module
afctl generate module -n second_module

.
├── deployments
│   └── project_demo-docker-compose.yml
├── migrations
├── plugins
├── project_demo
│   ├── commons
│   └── dags
│       ├── first_module
│       └── second_module
├── requirements.txt
└── tests
    ├── first_module
    └── second_module

```

### 4. Generate dag
```bash
afctl generate dag -n <name of dag> -m <name of module>
```

The following directory structure will be generate :

```bash
afctl generate dag -n new -m first_module

.
├── deployments
│   └── project_demo-docker-compose.yml
├── migrations
├── plugins
├── project_demo
│   ├── commons
│   └── dags
│       ├── first_module
│       │   └── new_dag.py
│       └── second_module
├── requirements.txt
└── tests
    ├── first_module
    └── second_module
```

The dag file will look like this :

```python
from airflow import DAG
from datetime import datetime, timedelta

default_args = {
'owner': 'project_demo',
# 'depends_on_past': ,
# 'start_date': ,
# 'email': ,
# 'email_on_failure': ,
# 'email_on_retry': ,
# 'retries': 0

}

dag = DAG(dag_id='new', default_args=default_args, schedule_interval='@once')
```

### 5. Deploy project locally

You can add python packages that will be required by your dags in `requirements.txt`. They will automatically get
installed.

* To deploy your project, run the following command (make sure docker is running) :

```bash
afctl deploy local
```

If you do not want to see the logs, you can run 
```bash
afctl deploy local -d
```
This will run it in detached mode and won't print the logs on the console.

* You can access your airflow webserver on browser at `localhost:8080`

### 6. Deploy project on production

* Here we will be deploying our project to **Qubole**. Sign up at us.qubole.com.
* add git-origin and access-token (if want to keep the project as private repo
on Github) to the configs. [See how](#manage-configurations)
* Push the project once completed to Github.
* Deploying to Qubole will require adding deployment configurations.

```bash
afctl config add -d qubole -n <name of deployment> -e <env> -c <cluster-label> -t <auth-token>
```
This command will modify your config file. You can see your config file with the following command :
```bash
afctl config show
```

For example - 
```bash
afctl config add -d qubole -n demo -e https://api.qubole.com -c airflow_1102 -t khd34djs3
```

* To deploy run the following command
```bash
afctl deploy qubole -n <name>
```

### The following video also contains all the steps of deploying project using afctl - 
https://www.youtube.com/watch?v=A4rcZDGtJME&feature=youtu.be

## Manage configurations

The configuration file is used for deployment contains the following information.
```yaml
global:
-airflow_version:
-git:
--origin:
--access-token:
deployment:
-qubole:
--local:
---compose:
```

* `airflow_version` can be added to the project when you initialize the project.
```bash
afctl init <name> -v <version>
```

* global configs (airflow_version, origin, access-token) can all be added/ updated with the following command :

```bash
afctl config global -o <git-origin> -t <access-token> -v <airflow_version>
```

## Usage

Commands right now supported are
* init
* config
* deploy
* list
* generate

To learn more, run 
```bash
afctl <command> -h
```

### Caution
Not yet ported for Windows.

#### Credits
Docker-compose file : https://github.com/puckel/docker-airflow

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