DEV Community

Cover image for Apache Airflow in Centos 7
Syamkumar
Syamkumar

Posted on

Apache Airflow in Centos 7

#airflow #opensource

Apache Airflow is an open-source workflow management platform. It started at Airbnb in October 2014 as a solution to manage the company's increasingly complex workflows. Creating Airflow allowed Airbnb to programmatically author and schedule their workflows and monitor them via the built-in Airflow user interface.

This document assumes you have a centos 7 VM with internet connectivity and a Sudo user.

  • Login as sudo 
sudo --login
Enter fullscreen mode Exit fullscreen mode
  • Update Packages 
yum update -y
Enter fullscreen mode Exit fullscreen mode
  • Install Epel release and yum-utils packages 
yum -y install epel-release yum-utils
Enter fullscreen mode Exit fullscreen mode
  • Install Development tools 
yum groupinstall "Development tools" -y
Enter fullscreen mode Exit fullscreen mode
  • Install required npm packages 
yum install -y zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel python-devel wget cyrus-sasl-devel.x86_64
Enter fullscreen mode Exit fullscreen mode
  • Install python and python developer tools Packages 
yum install -y python3 python3-devel
Enter fullscreen mode Exit fullscreen mode

Disable SeLinux 

setenforce 0
Enter fullscreen mode Exit fullscreen mode

Make the change permanent by editing

vi /etc/selinux/config
Enter fullscreen mode Exit fullscreen mode

change value

SELINUX=enforcing to SELINUX=disabled
Enter fullscreen mode Exit fullscreen mode

Install Postgres Database

  • Add Postgres repository to centos 
yum -y install https://download.postgresql.org/pub/repos/yum/reporpms/EL-7-x86_64/pgdg-redhat-repo-latest.noarch.rpm
Enter fullscreen mode Exit fullscreen mode
  • View info your Postgres repo by running 
rpm -qi pgdg-redhat-repo
Enter fullscreen mode Exit fullscreen mode
  • Enable and Install Postgresql 
yum-config-manager --enable pgdg12

yum install -y postgresql12-server postgresql12 postgresql-devel
Enter fullscreen mode Exit fullscreen mode
  • Initialize Database 
/usr/pgsql-12/bin/postgresql-12-setup initdb
Enter fullscreen mode Exit fullscreen mode
  • Enable and Start Postgresql Service 
systemctl enable --now postgresql-12
Enter fullscreen mode Exit fullscreen mode

Confirm Database is started by Running

systemctl status postgresql-12
Enter fullscreen mode Exit fullscreen mode

Configure a String Administrator Password for Postgres

  • Login to Postgresql 
su - postgres
Enter fullscreen mode Exit fullscreen mode
  • Open psql shell

psql

  • Run the alter user query 
alter user postgres with password 'StrongPassword';
Enter fullscreen mode Exit fullscreen mode
  • Edit the Postgres Service to enable MD5 authentication

vi /var/lib/pgsql/12/data/pg_hba.conf

# Accept from anywhere
host all all 0.0.0.0/0 md5

# Accept from trusted subnet
host all all 192.168.18.0/24 md5
Enter fullscreen mode Exit fullscreen mode

Choose according to your requirement.

Optional Step

  • Enable remote Postgres access ( Not recommended for Production systems

vi /var/lib/pgsql/12/data/postgresql.conf
Edit the above file Find the entry named listen_address
uncomment the entry and modify it as below.

listen_addresses = '192.168.10.10'
Enter fullscreen mode Exit fullscreen mode

or ( Not recommended in Production )

listen_addresses = '*'
Enter fullscreen mode Exit fullscreen mode

*Restart Postgres Service after you are done.

systemctl restart postgresql-12
Enter fullscreen mode Exit fullscreen mode

Top comments (0)

Read next

arindam_1729 profile image

9 Open Source Libraries to Supercharge Your Next Project 🔋⚡️

Arindam Majumder -

anthonymax profile image

🔥How to fetch HTML from server

Anthony Max -

anmolbaranwal profile image

These 7 AI Tools Helped Me Write Better Code in 2024

Anmol Baranwal -

abhirajadhikary06 profile image

UI Card Library

Abhiraj Adhikary -