Deploy Ktor App with Postgresql on Heroku

Photo by Kalen Emsley on Unsplash

So In this article we are going to learn how to deploy ktor app with postgresql database on Heroku server 😍 . I have already create a ktor application , if you want to get access of the project click here.

first we need to install heroku cli (command line interface) on your system 😉, through cli we will deploy ktor app on server.

For mac and linux installation , paste this command on terminal

brew tap heroku/brew && brew install heroku

for window installation , go to this website and download

The Heroku CLI

Let’s check , is heroku cli installed on your system or not ? type the below command on terminal

heroku --version

Now login into heroku through below command.

heroku login

Now it’s time to start the deployment process on heroku server , so go to your project , open build.gradle file and add the shadow plugin or dependencies and start sync.

So What’s shadow plugin does ? 🤔

So shadow plugin will create a fat jar file. The fat jar is the jar, which contains classes from all the libraries, on which your project depends and, of course, the classes of current project.

Now double click on build and jar file and wait to finish the build 👇🏻

Now you can run gradle command to build the jar file in the build/libs folder.

./gradlew build

Go to root folder -> build -> libs -> your jar file (In my case example-0.0.1-all.jar)

Now create a Procfile file on root folder of your project,and paste the below code.

web: java -jar build/libs/example-0.0.1-all.jar

Now create a .env file on root folder and paste the system environment credentials. This will helps you to run ktor app locally.

Now run the ktor app locally .. paste the below command on terminal

heroku local:start

and boom guys finally your ktor app running locally 🤩 and now it’s time to deploy and run app on heroku server.

First we need to create a git repository , where we push our code 😊

Go to VCS -> enable version control

Enter the below command to create repository

heroku create project_name

Then you have to set GRADLE_TASK in Heroku config vars , run this command on terminal.

heroku config:set GRADLE_TASK="shadowJar"

Now we will create a database for the heroku , where we will store our data..

heroku addons:create heroku-postgresql:hobby-dev

hobby-dev is a free database plan . Finally we have done with all the steps, now push the code on heroku master.

Go to your heroku sever , open the project -> go to setting

Click on Config Vars and add your system environment variable credentials.

Now you can test your api on postman 😍 click on open app

Hope you enjoyed the article , if you face any issue while deploying feel free to ask in the comment section , definitely will help you 😊 Keep learning happy coding ❤️