How To Deploy PostgreSQL with Docker on Kubernetes

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by Gursimran Singh | March 10, 2017  How To Deploy PostgreSQL with Docker on Kubernetes

What is PostgreSQL?

PostgreSQL is a powerful, open source Relational Database Management System. PostgreSQL is not controlled by any organization or any individual. Its source code is available free of charge. It is pronounced as "post-gress-Q-L". 

PostgreSQL has earned a strong reputation for its reliability, data integrity, and correctness. 

  • It runs on all major operating systems, including Linux, UNIX (AIX, BSD, HP-UX, SGI IRIX, MacOS, Solaris, Tru64), and Windows. 
  • It is fully ACID compliant, has full support for foreign keys, joins, views, triggers, and stored procedures (in multiple languages). 
  • It includes most SQL:2008 data types, including INTEGER, NUMERIC, BOOLEAN, CHAR, VARCHAR, DATE, INTERVAL, and TIMESTAMP. 
  • It also supports storage of binary large objects, including pictures, sounds, or video. 
  • It has native programming interfaces for C/C++, Java, .Net, Perl, Python, Ruby, Tcl, ODBC, among others, and exceptional documentation.


To follow this guide you need -

Step 1 - Create a PostgreSQL Container Image

Create a file name “Dockerfile” for PostgreSQL. This image contains our custom config dockerfile which will look like -

This Postgres image has a base image of ubuntu xenial. After that, we create Super User and default databases. Exposing 5432 port will help external system to connect the PostgreSQL server.

Step 2 - Build PostgreSQL Docker Image

Step 3 - Create a Storage Volume (Using GlusterFS)

Using below-mentioned command create a volume in GlusterFS for PostgreSQL and start it. As we don’t want to lose our PostgreSQL Database data just because a Gluster server dies in the cluster, so we put replica 2 or more for higher availability of data.


Step 4 - Deploy PostgreSQL on Kubernetes

Deploying PostgreSQL on Kubernetes have following prerequisites -

  • Docker Image: We have created a Docker Image for Postgres in Step 2

  • Persistent Shared Storage Volume: We have created a Persistent Shared Storage Volume in Step 3

  • Deployment & Service Files: Next, we will create Deployment & Service Files

Create a file name “deployment.yml” for PostgreSQL. This deployment file will look like -

We need to Define the Environment Variables for PostgreSQL

1. POSTGRES_USER (Super Username for PostgreSQL)

2. POSTGRES_PASSWORD (Super User password for PostgreSQL)

3. PGDATA (Data Directory for PostgreSQL Database)

Now we need to create a file named “service.yml” for PostgreSQL. This deployment file will look like -

Now let's deploy PostgreSQL using following commands:


Now you have successfully Deployed PostgreSQL on Kubernetes


PostgreSQL is a powerful, open source object-relational database system. PostgreSQL on kubernetes helped to utilize resources even much better than virtual machines and also provide isolation from other apps which are deployed on the same machine.

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